Bryant T6 PRH A Thermostat User Manual

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T 6 - P R H - A , T 6 - N R H - A  
               
PREFERREDt SERIES  
THERMIDISTAT  
Installation Instructions  
A07045  
A07044  
Programmable Control  
Non --- Programmable Control  
NOTE: Read the entire instruction manual before starting the installation.  
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TABLE OF CONTENTS  
PAGE  
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2  
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3  
INSTALLATION CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4  
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8  
SYSTEM START -- UP AND CHECKOUT . . . . . . . . . . . . . . . . . . . . . . . . . . 43  
OPERATIONAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54  
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57  
WIRING DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61  
THERMIDISTAT CONTROL CONFIGURATION RECORD . . . . . . . . . . . 81  
SAFETY CONSIDERATIONS  
Read and follow manufacturer instructions carefully. Follow all local electrical  
codes during installation. All wiring must conform to local and national electrical  
codes. Improper wiring or installation may damage Thermidistat Control.  
Recognize safety information. This is the safety -- alert symbol  
. When you see  
this symbol on the equipment and in the instruction manual, be alert to the  
potential for personal injury.  
Understand the signal words DANGER, WARNING, and CAUTION. These  
words are used with the safety -- alert symbol. DANGER identifies the most  
serious hazards which will result in severe personal injury or death. WARNING  
signifies a hazard which could result in personal injury or death. CAUTION is  
used to identify unsafe practices which may result in minor personal injury or  
product and property damage. NOTE is used to highlight suggestions which will  
result in enhanced installation, reliability, or operation.  
2
INTRODUCTION  
Bryant’s 7 -- day, 5/2 -- day, 1 -- day programmable and non -- programmable  
Preferred Series Thermidistat Control is a wall -- mounted, low -- voltage control  
which combines temperature and humidity control in either a single unit or a  
two -- piece unit. In two -- piece configuration, the relays are located near the  
equipment and a two -- wire connection is used between the Display Module and  
the Equipment Control Module. Single -- piece installation requires more wiring  
and results in a higher profile. The Preferred Series Thermidistat has no need for  
batteries to store user -- configured settings in memory. During power loss its  
internal memory saves settings for unlimited time, and the clock continues to run  
for at least 24 hours. An extension of Bryant’s proven line of thermostats; it  
provides separate setpoints for heating and cooling in addition to humidification  
and dehumidification.  
In the Preferred Series Thermidistat Control’s programmable configuration,  
different heating and cooling setpoints and times are programmable for 4 periods  
per day or 2 periods per day. Programming can be done for 7 days per week, 5/2  
days per week, or 1 day. The programmable Thermidistat Control can also be  
user configured as a non -- programmable Thermidistat Control. When operating  
as non -- programmable, the Thermidistat Control will still have both temperature  
and humidity control.  
The non -- programmable Thermidistat Control features Touch ’N’ Got settings  
for quick and easy temperature change without complicated programming  
schedules. The non -- programmable Thermidistat Control will still have both  
temperature and humidity control. And, its Touch ’N’ Go technology enables the  
user to switch between three different user -- configurable settings through  
intuitive buttons located just below the display.  
3
INSTALLATION CONSIDERATIONS  
Power  
This control is powered by 24VAC only. It requires 24VAC (Rh and/or Rc and C  
terminals) of the low -- voltage transformer to be connected to it for proper  
operation. It will not operate without these 2 connections. Rh and Rc are  
connected via PCB breakout jumper. See Fig. 1. For applications using two  
2
4VAC transformers, one in the indoor unit and one in the outdoor unit, connect  
the common from each to the C terminal. Connect R from the indoor unit to the  
Rh terminal. Connect R from the outdoor unit to the Rc terminal. Then, break  
jumper on the circuit board. The W and HUM signals are taken from the Rh  
power and the G signal is taken from the Rc power. If Thermidistat Control has  
been installed in a two -- transformer application that is later changed to a  
single -- transformer installation, installer must install a field supplied jumper  
between Rc and Rh. Depending on the installation, up to 14 wires may be  
required. Installation as two -- piece unit is recommended. Only 2 wires are  
required for connection between Display Module and Equipment Control  
Module. These two wires (V+ and Vg) do not provide ordinary 24VAC. They  
carry a combination of power and communications data that is unique to these  
products.  
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A07052  
Fig. 1 -- PCB Breakout Jumper  
Models  
There are programmable and non -- programmable models for all applications.  
They can be configured for AC or HP, 1 -- or 2 -- speed compressor, and for Hybrid  
Heatt installations, allowing it to be used in place of all Bryant thermostats.  
Programmable Thermidistat Controls may be configured as non -- programmable  
if user desires.  
Humidify Equipment and Connections  
The humidify output connects directly to 24VAC operated humidifiers. No other  
connection or interlock is required. Any of several installer -- selectable operating  
modes are available.  
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!
WARNING  
ELECTRICAL OPERATION HAZARD  
Failure to follow this warning could result in personal injury  
or death.  
DO NOT connect furnace HUM terminal directly to  
Thermidistat Control HUM terminal. This will bypass furnace  
safety controls. See Low Voltage Wiring Diagrams and notes  
for proper connection.  
Dehumidify Equipment and Connections  
The dry contact output connects to the dehumidify input on variable -- speed  
furnaces and fan coils. Additional dehumidification is done by controlling the  
compressor. A variety of operating modes are available. The dry contact must be  
configured for dehumidification in setup Option 19. See Wiring Diagrams for  
more information.  
Outdoor Temperature Sensor  
Outdoor air temperature sensor is included in the box with the Thermidistat  
Control. Optimum performance is obtained when an outdoor temperature sensor  
is used with the Thermidistat Control. Plan installation so that 2 wires can be run  
from Equipment Control Module to an outdoor location, preferably on the north  
side of the house or refer to Installation Instructions included with the outdoor  
temperature sensor for simplified connection. Sensor can be mounted to outdoor  
unit and existing control wires may be used for its connection. Details are  
provided in sensor instructions.  
6
Remote Indoor Temperature Sensor  
A remote temperature sensor may be used with the programmable model, where  
it is desirable to install the Thermidistat Control in a limited access location while  
measuring the temperature in the living space. The remote room sensor may be  
used as a stand alone or average with local sensor.  
Two-Piece Thermidistat Control Configuration  
The Preferred Series Thermidistat Control can be installed in one of two  
configurations. The control may be installed as a single -- piece Thermidistat or it  
may be split into two pieces and mounted in separate locations. As a single -- piece  
unit, all required wiring must be brought to the Equipment Control Module for  
connection to the terminal strip. In two -- piece configuration, the Display Module  
can be mounted in the living space while the Equipment Control Module may be  
mounted near the indoor furnace or fan coil. Connection from the display to the  
Equipment Control Module requires only two wires. All other control wires are  
connected to the Equipment Control Module from the HVAC equipment. This  
configuration results in a slimmer display and locates the Equipment Control  
Module containing the switching relays away from the main living space where  
relay clicking will not be heard.  
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INSTALLATION  
Carton contains the following components. See Fig. 2 for T6 -- PRH or Fig. 3 for  
T6 -- NRH.  
A07752  
Fig. 2 -- T6 -- PRH -- A Carton Contents  
1
2
3
4
. Display Module  
. Stand -- off for Equipment Control Module  
. Outside Air Temperature Sensor, screws and pigtail.  
. Equipment Control Module  
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A07753  
Fig. 3 -- T6 -- NRH -- A Carton Contents  
. Display Module  
1
2
3
4
. Stand -- off for Equipment Control Module  
. Outside Air Temperature Sensor, screws and pigtail.  
. Equipment Control Module  
Thermidistat Control Location  
Thermidistat Control should be mounted:  
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Approximately 5 ft (1.5m) from floor.  
Close to or in a frequently used room, preferably on an inside parti-  
tioning wall.  
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On a section of wall without pipes or duct work.  
Thermidistat Control should NOT be mounted:  
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Close to a window, on an outside wall, or next to a door leading to the  
outside.  
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Exposed to direct light or heat from a lamp, sun, fireplace, or other  
temperature -- radiating objects which could cause a false reading.  
Close to or in direct airflow from supply registers and return -- air regis-  
ters.  
In areas with poor air circulation, such as behind a door or in an al-  
cove.  
Installer should determine whether control will be installed as single -- piece or  
two -- piece. In single -- piece configuration, as many as 14 wires may need to run  
to wall mounting location for connection to the control. In two -- piece  
configuration, the Display Module and Equipment Control Module are  
connected by two wires.  
Install Thermidistat Control  
!
WARNING  
ELECTRICAL OPERATION HAZARD  
Failure to follow this warning could result in personal injury  
or death.  
Before installing Thermidistat Control, turn off all power to  
equipment. There may be more than 1 power disconnect.  
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CAUTION  
UNIT DAMAGE HAZARD  
Failure to follow this caution may result in equipment damage  
or improper operation.  
Improper wiring or installation may damage Thermidistat  
Control. Check to make sure wiring is correct before  
proceeding with installation or turning on power.  
1
. Turn off all power to equipment.  
2
. If an existing Thermidistat Control or thermostat is being replaced:  
a. Remove existing control from wall.  
b. Disconnect wires from existing thermostat, 1 at a time.  
c. As each wire is disconnected, record wire color and terminal marking.  
d. New or additional wires may be needed to accommodate added hu-  
midity outputs.  
e. Discard or recycle old control.  
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CAUTION  
ENVIRONMENTAL HAZARD  
Failure to follow this caution may result in environmental  
damage.  
Mercury is a hazardous waste. Federal regulations require that  
Mercury be disposed of properly.  
Two-Piece Installation  
The following steps should be followed for the installation of the two -- piece  
configuration.  
NOTE: The 2 -- wire pigtail is not intended to support the weight of the User  
Interface. Do not hang the User Interface from the Equipment Control Module  
screw terminals.  
1
. Remove mounting plate from back of Display Module by pressing the  
two tabs on the bottom edge and pulling away. See Fig. 4 and 5.  
1
2
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A07225  
Fig. 4 -- Press Tabs to Remove Backplate  
A07226  
Fig. 5 -- Take Apart  
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3
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2
. Route wires through large hole in mounting base. Level mounting base  
against wall (for aesthetic value only—Display Module need not be lev-  
eled for proper operation) and mark wall through 2 mounting holes. See  
Fig. 6.  
A07165  
Fig. 6 -- Backplate Mounting  
3
. Drill two 3/16 -- in. mounting holes in wall where marked. Thermidistat  
Control may be mounted to a standard junction box, if desired. Hole pat-  
tern on Thermidistat Control mounting base matches junction box mount-  
ing holes.  
4
5
. Secure rear plastic mounting base to wall with 2 screws and anchors pro-  
vided. Additional mounting holes are available for more secure mounting  
if needed. Make sure all wires extend through hole in mounting base.  
. Adjust length and routing of each wire to reach proper connector block  
and terminal on mounting base with 1/4 -- in. extra wire.  
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. Match and connect equipment wires to proper terminals of each connector  
block, being careful not to over tighten the screws. Correct polarity must  
be observed when connecting the two wires from the Equipment Control  
Module to the Thermidistat Control mounting base. If wires are con-  
nected incorrectly, the Display Module will not operate. See Fig. 7, 8 and  
9
.
A08072  
Fig. 7 -- Control Module Wiring Guide  
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Red is V+  
Black is Vg  
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A07166  
Fig. 8 -- Secure Wires to Terminal Strip  
A07167  
Fig. 9 -- Connect Pigtail Wires to Display Module  
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NOTE: The 2 -- wire pigtail is not intended to support the weight of the User  
Interface. Do not hang the User Interface from the Equipment Control Module  
screw terminals.  
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Red of the pigtail is V+  
Black of the pigtail is Vg  
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7
8
9
. Push any excess wire into wall and against mounting base. Seal hole in  
wall to prevent air leaks. Leaks can affect operation and cause incorrect  
temperature and/or humidity measurement.  
. Make sure to attach 2 -- wire pigtail to Display Module mounting base. It is  
packed loose in the box from the factory. Then attach 2 -- wire pigtail to the  
back of the Display Module via 2 pin, keyed connector.  
. Reattach Display Module body to mounting base by first setting on at top  
of mounting base and then push bottom corners of Display Module to  
snap into place. See Fig. 10.  
A07169  
Fig. 10 -- Attach Display to Backplate  
1
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1
0. Find suitable indoor mounting location for Equipment Control Module,  
either near or on equipment. See Fig. 11.  
IMPORTANT NOTE: Equipment Control Module should not be mounted  
to duct work or below any other controls or equipment (i.e. humidistat,  
humidifier, etc.).  
A07217  
Fig. 11 -- Equipment Control Module on Equipment  
11. Route wires through rear of Equipment Control Module using either a  
clearance hole or supplied standoff. See Fig. 12.  
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A07227  
Fig. 12 -- Standoff  
NOTE: Standoffs are provided as an aid when installing Equipment Control  
Module on inside equipment or a solid wall.  
1
2. Match and connect equipment wires to proper terminals of each connector  
block being careful not to over tighten the screws. Correct polarity must  
be observed when connecting the two wires from the Equipment Control  
Module to the Thermidistat Control mounting base. If wires are con-  
nected incorrectly, the Display Module will not operate. See Fig. 7, 8 and  
9
.
1
3. Snap cover over top of Equipment Control Module. See Fig. 13.  
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A07218  
Fig. 13 -- Cover on Equipment Control Module  
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4. Turn on power to equipment. On power up, all display segments will  
light for 5 sec. For the next 5 sec a 2 -- digit code appears on large display  
which identifies Thermidistat Control configuration. Refer to Option 33.  
a. AC — 1 -- stage air conditioner  
b. HP — 1 -- stage heat pump  
c. A2 — 2 -- stage air conditioner  
d. H2 — 2 -- stage heat pump  
e. hh — Hybrid Heat system with 1 -- stage heat pump  
f. h2 — Hybrid Heat system with 2 -- stage heat pump  
g. H — heating only system  
h. C — cooling only system  
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Single-Piece Installation  
The following steps should be followed for the installation of the single -- piece  
configuration.  
1
. Remove cover from Equipment Control Module by pressing the two tabs  
on the bottom edge and pulling away. Route wires through large hole in  
Equipment Control Module. Level Equipment Control Module against  
wall (for aesthetic value only -- Equipment Control Module need not be  
leveled for proper operation) and mark wall through 2 mounting holes.  
2
3
4
. Drill two 3/16 -- in. mounting holes in wall where marked. Thermidistat  
Control may be mounted to a standard junction box if desired. Hole pat-  
tern on Equipment Control Module matches junction box mounting  
holes.  
. Secure rear plastic Equipment Control Module to wall with 2 screws and  
anchors provided. Additional mounting holes are available for more se-  
cure mounting if needed. Make sure all wires extend through hole in  
Equipment Control Module.  
. Adjust length and routing of each wire to reach proper connector block  
and terminal on Equipment Control Module with 1/4 -- in. extra length.  
See Fig. 14.  
2
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A07219  
Fig. 14 -- Equipment Control Module  
5
6
. Match and connect equipment wires to proper terminals of each connector  
block.  
. Push any excess wire into wall and against Equipment Control Module.  
Seal hole in wall to prevent air leaks. Leaks can affect operation and cause  
incorrect temperature and/or humidity measurement.  
7
8
. Attach 2 -- wire pigtail to Equipment Control Module terminal block (ter-  
minals V+ and Vg). Attach 2 -- wire pigtail to the back of the Display  
Module via 2 pin, keyed connector.  
. Reattach Display Module body to Equipment Control Module by first  
setting on at top and then push bottom corners to snap into place. See Fig.  
1
5.  
2
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A07221  
Fig. 15 -- Reattach Display Module  
9
. Turn on power to equipment. On power up, all display segments will  
light for 5 sec. For the next 5 sec a 2 -- digit code appears on large display  
which identifies Thermidistat Control configuration. Refer to Option 33.  
a. AC — 1 -- stage air conditioner  
b. HP — 1 -- stage heat pump  
c. A2 — 2 -- stage air conditioner  
d. H2 — 2 -- stage heat pump  
e. hh — Hybrid Heat system with 1 -- stage heat pump  
f. h2 — Hybrid Heat system with 2 -- stage heat pump  
g. H — heating only system  
h. C — cooling only system  
2
3
Set Thermidistat Control Configuration  
Configuration options enable the installer to configure the Thermidistat Control  
for a particular installation. Most are not presented to the homeowner and  
therefore must be properly set by the installer. (Only those marked with an  
asterisk  
* below are available to the homeowner.) The homeowner  
configurations are described in the owner’s manual. A special procedure allows  
entry into the configuration mode. While in configuration mode, up to 33  
selections can be made. Description of each selection and how to use the  
configuration mode follows.  
CONFIGURATION OPTIONS -- SUMMARY  
Option 01 — Equipment Type  
Option 02 — Clean Filter Timer Adjustment  
Option 03* — Fahrenheit/Centigrade Selection  
Option 04 — Fan (G) on with W/W1 Selection  
Option 05 — Room Air Temperature Sensing (programmable  
models only)  
Option 06 — Cooling Lockout Below 55_F/13_C Selection (only  
available if outdoor air sensor is present)  
Option 07 — Zoning  
Option 08 — Auxiliary Heat Lockout Temperature Setting (only  
available when heat pump is used and when  
outdoor air temperature sensor is present)  
Option 09 — Heat Pump Lockout Temperature (only available when  
outdoor air temperature sensor is present)  
Option 10 — Reversing Valve  
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4
Option 11 — Adjustable Setpoint Deadband (not available on  
heat only and cool only systems)  
Option 12 — Smart Recovery (programmable models only)  
Option 13 — Room Temperature Offset Adjustment  
Option 14 — Humidity Offset Adjustment  
Option 15 — Enable Auto Mode  
Option 16 — Cycles Per Hour  
Option 17 — Time Between Stages  
Option 18* — Backlight Configuration  
Option 19 — Dry Contact  
Option 20 — Outdoor Air Temperature Offset Adjustment  
Option 21* — Keypad Lockout  
Option 22 — High Cool Latch Temperature  
Option 23 — High Heat Latch Temperature  
Option 24* — Programmable/Non -- Programmable  
(
programmable models only)  
Option 25* — Number of Programmable Periods per Day  
programmable models only)  
(
Option 26 — Minimum Cooling Setpoint  
Option 27 — Maximum heating Setpoint  
Option 28 — UV Light Reminder  
Option 29 — Humidifier Pad Reminder  
Option 30* — Programmable Fan (programmable models only)  
2
5
Option 31* — Daylight Savings Time Configuration  
programmable models only)  
(
Option 32 — Furnace Heat Staging  
Option 33 — Single or Two -- Piece Installation  
Option 40 — Fan Humidify  
Option 41 — Variable Speed Blower  
Option 42 — Variable Speed Super Dehumidification  
Option 43 — Intelligent Heat Staging  
Option 44 — Super Comfort Heat  
Option 99 — Reset to Factory Defaults  
TO ENTER CONFIGURATION MODE  
Press and hold FAN button for approximately 10 sec. The Display Module is  
now in configuration mode. It will automatically exit this mode if no button is  
pressed for 3 minutes. Pressing the DONE button will exit configuration mode  
immediately.  
WHILE IN CONFIGURATION MODE  
The option number is displayed in the heat setpoint location and the  
configuration setting is displayed in the cool setpoint location. On the  
T6 -- PRH -- A (programmable) model, a box will surround the option number. The  
mode button is used to move the box between the two displayed values. The soft  
keys below the listed values may also be used to move the box between selected  
values. The value inside the box is changed by using the UP/DOWN buttons. On  
the T6 -- NRH -- A (non -- programmable) model, one of the values will be flashing.  
The mode button is used to change which value is flashing or the Home and  
Sleep buttons may also be used to select which value to flash. The value that is  
flashing is changed by using the UP/DOWN buttons. All changes made are  
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saved at the time of selection and will be saved in the event of the 3 minute  
time -- out or when installer exits from configuration menu.  
Configuration Options —Selection  
Option 01 — Equipment Type  
Range: H2, A2, HP, AC, hh, h2, H, C  
H2 — operates a two -- speed heat pump with a fan coil  
HP — operates a single -- speed heat pump with a fan coil  
A2 — operates a two -- speed AC  
AC — operates a single -- speed AC  
hh — operates a single -- speed heat pump with a furnace  
h2 — operates a two -- speed heat pump with a furnace  
H
— operates a heat -- only system. Furnace or fan coil only;  
no outdoor unit.  
C
— operates a cool only -- system. Outdoor AC unit with an  
indoor fan coil with no strip heaters.  
Default is H2.  
Option 02 — Clean Filter Timer  
Select hours of blower operation (heating, cooling, or fan) before CHECK  
FILTER icon is displayed. With OF selected, icon will never come on, disabling  
this feature. Time selection can range from 800 to 7200 hr by selecting numbers  
1
through 9. (Time is 800 X number selected.) Default is 4 (3200 hr).  
Recommended selections are disposable filter -- 800 to 2400 hr, media filter -- 2400  
to 3200 hr, or electronic air cleaner -- 1600 to 2400 hr of blower operation. For  
higher efficiency filter, please consult filter’s Installation Instruction for details.  
2
7
Option 03 — Fahrenheit/Centigrade  
Select between Fahrenheit (F) and Centigrade (C) operation. Factory default is  
Fahrenheit (F).  
Option 04 — Fan (G) On With W/W1  
This selection determines whether fan (G) output is to be On or OFF when any  
W/W1 (furnace or strip heat) output is On. Most furnaces and fan coils manage  
their own blowers and do not require separate G signal. For these applications,  
select OFF. Some auxiliary heaters require separate G signal to turn on blower. In  
this case, select On.  
Default is OF (off).  
Option 05 — Room Air Temperature Sensing (programmable models only)  
This selection determines which sensor the control will use for measuring room  
air temperature. Room air temperature can be sensed in one of three ways; the  
local sensor (L) located on the Display Module, the remote room air sensor (r),  
or the average of local and remote sensors (Lr). Settings are L, r, Lr.  
Default is L.  
Option 06 — Cooling Lockout Below 55_F/13_C  
This selection disables cooling when outdoor temperature is below 55_F/13_C.  
It requires an outdoor temperature sensor. Setting is not available if valid outdoor  
sensor is not connected. Set to OF (off) to allow cooling below 55_F/13_C. Set  
to On to prevent cooling below 55_F/13_C.  
Factory default is OF (off).  
Option 07 — Zoning  
This selection should be set to On when the Thermidistat Control is to be used as  
part of a zoning system. It is assumed that the zoning equipment will take care of  
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8
time guard and cycle timers. The minimum On time is still controlled by the  
Thermidistat Control.  
Default is OF (off).  
Option 08 — Auxiliary Heat Lockout Temperature  
This selection is available on heat pump systems with a valid outdoor  
temperature sensor connected. Available settings are: Off, 5, 10, 15, 20, 25, 30,  
3
5, 40, 45, 50, 55.  
OF (off) -- function is disabled. Auxiliary heat is allowed to operate whenever  
sufficient demand for heat is available.  
5
-- 55_F/ -- 1 5 -- 1 3 _C -- Outdoor temperature above which the auxiliary heat is not  
allowed to operate (unless MODE is set to Emergency Heat).  
Default is OF (off).  
Option 09 — Heat Pump Lockout Temperature (only available when heat  
pump is used and when outdoor air temperature sensor is present)  
This selection is only available on Hybrid Heat systems. A Hybrid Heat system  
is selected via the Option 1 Equipment Type configuration. Configurations  
settings are: OF (off), 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55.  
OF (off) — the heating cycle will always start with heat pump heating.  
5
-- 55_F / -- 1 5 -- 1 3 _C — the outdoor temperature below which heat pump  
operation is not allowed.  
When emergency heat mode is selected, only auxiliary heat will operate.  
Default is OF (off).  
Option 10 — Reversing Valve  
This selection is only available on heat pump systems. “O” terminal can be  
configured to be energized in either heating mode or in cooling mode, depending  
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on heat pump operation. “O” is used to describe a heat pump system that  
energizes its reversing valve in cooling. “B” is used to describe a heat pump  
system that energized its reversing valve in heating.  
H — Reversing valve output (O/W2/B) is energized when HEAT mode is  
selected.  
C — Reversing valve output (O/W2/B) is energized when COOL mode is  
selected.  
Default is C.  
Option 11 — Deadband Setting Between Heat & Cool  
This option is not available on Heat Only and Cool Only systems. The selection  
allows the installer to choose how much differential exists between the heating  
and cooling setpoints. Allowable selections are 1 -- 6.  
Default is 2.  
Option 12 — Smart Recovery  
Smart Recovery OF (off) means setpoints change precisely at setback recovery  
time. Thirty, 60, or 90 selects the number of minutes recovery starts before  
programmed recovery time. Recovery takes place smoothly during the selected  
recovery time, ending at the recovery time and temperature which is  
programmed. Not available with non -- programmable Thermidistat Controls or  
when Thermidistat Control is configured as non -- programmable.  
Default is 90.  
Option 13 — Room Air Temperature Offset Adjust  
The number of degrees to be added to the displayed temperature to calibrate or  
deliberately miscalibrate the measured room temperature ( -- 5 to +5_).  
Default is 0.  
3
0
Option 14 — Humidity Display Offset Adjust  
The percentage to be added to the displayed humidity to calibrate or deliberately  
miscalibrate the measured room humidity ( -- 9% to +9% RH).  
Default is 0.  
Option 15 — Enable Auto Mode  
This selection is not available if the Thermidistat Control is configured as Heat  
Only or Cool Only in Option 1. This allows the homeowner to select auto  
changeover mode in addition to heat and cool. This allows the Thermidistat  
Control to automatically change between heating mode and cooling mode when  
sufficient demand for heating or cooling exists.  
On — Auto mode is available.  
OF — Auto mode is not available.  
Default is On.  
Option 16 — Maximum Cycles Per Hour  
This selection limits the number of cycles per hour that the Thermidistat Control  
allows the system to operate. Selections are 2, 4, 6.  
2
— The heating and cooling outputs will be energized no more than 2 times per  
hour. When an output is energized, it will not be energized again for 30 minutes.  
— The heating and cooling outputs will be energized no more than 4 times per  
hour. When an output is energized, it will not be energized again for 15 minutes.  
— The heating and cooling outputs will be energized no more than 6 times per  
4
6
hour. When an output is energized, it will not be energized again for 10 minutes.  
Default is 4.  
3
1
Option 17 — Time Between Equipment Stages  
This selection is only available for heat pump systems. This determines the  
minimum number of minutes of equipment operation on the highest compressor  
stage before allowing the transition to auxiliary heat. Available selections are 10,  
1
5, 20, and 25. The time between stages of any individual piece of equipment,  
such as low speed and high speed compressor or fan coil stages, will be fixed at  
0 minutes.  
1
Default is 15.  
Option 18 — Backlight Configuration  
When OF (off), the backlight will be lit for 10 seconds after a button is pressed.  
After 10 seconds of no button presses, the backlight turns off. When On, the  
backlight will normally be on and dim in appearance. The backlight brightness  
becomes brighter when a button is pressed. After 10 seconds of no button  
presses, the backlight will return to the dimmer level until another button press  
occurs. The range of brightness is 1 through 5 with 5 being full brightness.  
Default is 3.  
Option 19 — Dry Contact Configuration (programmable models only)  
There are 3 available selections, OF, 1 and 2.  
OF — The dry contact is always de -- energized.  
1
— The dry contact will be energized for the specified number of minutes per  
hour. This selection is programmable by period. When this selection is changed  
from OF to 1, the period icons are shown and the minute segments of the clock  
display are shown. The triangle icon next to the WAKE period will be on and a  
value between 0 and 60 will be shown in the minutes display. See Operational  
Information and Wiring Diagrams for further explanation of dry contact  
configuration and use. To change the period or minutes, press the soft key below  
3
2
the period or minutes and then use the UP/DOWN buttons to change to the  
desired value.  
2
— The dry contact will operate as a DH relay. This relay is reverse logic. When  
the humidity level is above the dehumidify setpoint, the dry contact D1 -- D2 will  
be opened. When the humidity level is below the dehumidify setpoint, D1 -- D2  
will be closed. There is a +/ -- 2% hysteresis around the dehumidify setpoint to  
prevent rapid on/off cycling of the DH output. When configured for  
dehumidification, the Rc terminal must be connected to one of the dry contact  
terminals. This provides power to energize the dehumidify terminal on the  
cooling equipment when the dry contact is closed. See Wiring Diagrams for  
more information.  
Default is OF (off).  
Option 19 — Dry Contact Configuration (non -- programmable models only)  
OF — The dry contact is always de -- energized.  
ON — The dry contact will operate as a DH relay. This relay is reverse logic.  
When the humidity level is above the dehumidify setpoint, the dry contact  
D1 -- D2 will be opened. When the humidity level is below the dehumidify  
setpoint, D1 -- D2 will be closed. There is a +/ -- 2% hysteresis around the  
dehumidify setpoint to prevent rapid on/off cycling of the DH output. When  
configured for dehumidification, the Rc terminal must be connected to one of the  
dry contact terminals. This provides power to energize the dehumidify terminal  
on the cooling equipment when the dry contact is closed. See Wiring Diagrams  
for more information.  
Default is OF (off).  
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3
Option 20 — Outdoor Air Temperature Offset Adjustment  
This selection allows the calibration, or deliberate miscalibration of the outdoor  
air temperature sensor reading. The selection ranges from -- 5 to +5_.  
Default is 0.  
Option 21 — Keypad Lockout (programmable models only)  
This selection allows the installer to limit access to the keypad. Selections are OF  
(off), 1, 2, 3. These options are independent of Option 24, which allows the  
programmable model to be configured as a non -- programmable thermostat.  
OF (off) — The user has full access to the keypad.  
1
2
3
— The user has access to change the setpoints, time of day and calendar.  
— The user has access to change the setpoints only.  
— The entire keypad is locked. When a button is pressed, the backlight will  
turn on but none of the operating parameters will be changed.  
When the keypad lock selection is turned on, the padlock icon will be displayed.  
To unlock the keypad, press and hold the UP/DOWN buttons simultaneously for  
five seconds. When the keypad is unlocked, the padlock icon will turn off. The  
keypad will remain unlocked for two minutes after the last button press. After  
two minutes with no button presses, the keypad will lock again. The keypad will  
not lock in the software configuration mode or in the installer test mode.  
Default is OF (off).  
Option 21 — Keypad Lockout (non -- programmable models only)  
This selection allows the installer to limit access to the keypad. Selections are OF  
(off), 1, 2.  
OF (off) — The user has full access to the keypad.  
3
4
1
— The user has access to modify Home, Sleep, Away, and UP/DOWN  
setpoints.  
— The entire keypad is locked. When a button is pressed, the backlight will  
2
turn on but none of the operating parameters will be changed.  
When the keypad lock selection is turned on, the padlock icon will be displayed.  
To unlock the keypad, press and hold the UP/DOWN buttons simultaneously for  
five seconds. When the keypad is unlocked, the padlock icon will turn off. The  
keypad will remain unlocked for two minutes after the last button press. After  
two minutes with no button presses, the keypad will lock again. The keypad will  
not lock in the software configuration mode or in the installer test mode.  
Default is OF (off).  
Option 22 — High Cool Latch Temperature (only available if outdoor  
sensor is present)  
An outdoor sensor is required for high cool latch feature.  
This selection is only available when Option 1 is set to H2, A2, or h2 and when  
Option 7 (zoning) is set to OF (off). Configuration settings are OF (off), 80, 85,  
9
0, 95, 100, 105, 110, On.  
OF (off) — Cooling always starts in low stage (Y1) and stages up to high stage  
Y1 and Y/Y2) when demand is sufficient and staging timer constraints have  
been satisfied.  
0 -- 110_F/27 -- 43_C — Outdoor temperature above which both first and second  
(
8
stages of the compressor are energized to satisfy all cooling demands. When a  
cycle starts under a high cool latch, it will finish the cooling cycle on high stage.  
If the cooling equipment is energized to satisfy a dehumidify demand only (no  
cooling demand), the latch will not be applied.  
3
5
On — The Y1 and Y/Y2 outputs are simultaneously energized to satisfy all  
cooling demands.  
Default is OF (off).  
Option 23 — High Heat Latch Temperature (only available if outdoor  
sensor is present)  
This selection is only available when Option 1 is set to H2, or h2 and Option 7  
(
4
zoning) is set to OF (off). Configuration settings are OF (off), 20, 25, 30, 35, 40,  
5, 50, On.  
OF (off) —Heating always starts in low stage (Y1) and stages up to high stage  
Y1 and Y/Y2) when demand is sufficient and staging timer constraints have  
been satisfied.  
0 -- 50_F/ -- 7 -- 10_C — Outdoor temperature below which both first and second  
(
2
stages of the compressor are energized to satisfy all heating demands. When a  
cycle starts under a high heat latch, it will finish the heating cycle on high stage.  
On — The Y1 and Y/Y2 outputs are simultaneously energized to satisfy all  
heating demands.  
Default is OF (off).  
Option 24 — Programmable/Non -- Programmable (programmable models  
only)  
This selection allows the installer to configure the Thermidistat Control as either  
programmable or non -- programmable. Selections are P, nP.  
Default is P.  
Option 25 — Number of Programmable Periods (programmable models  
only)  
This selection allows the installer to configure the Thermidistat Control for two  
or four periods per day. Two periods is a common commercial application and  
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6
four periods is more common for residential. This selection is not available if  
Option 24 has been set to nP to configure the Thermidistat Control for  
non -- programmable operation.  
2
4
— Periods DAY and SLEEP are available  
— Periods WAKE, DAY, EVE, and SLEEP are available.  
Default is 4.  
Option 26 — Minimum Cooling Setpoint  
This selection allows the installer to configure the minimum cooling setpoint that  
the user is allowed to set. The range is based on the value of the adjustable  
deadband Option 11, such that the minimum of the range is 50_F/10_C plus the  
adjustable deadband and the maximum is 90_F/32_C.  
Default is 52_F/11_C (based on the adjustable deadband default = 2).  
Option 27 — Maximum Heating Setpoint  
This selection allows the installer to configure the maximum heating setpoint.  
The range is based on the adjustable deadband value Option 11, such that the  
minimum of the range is 50_F/10_C and the maximum is 90_F/32_C minus the  
deadband.  
Default is 88_F/31_C (based on the adjustable deadband default = 2).  
Option 28 — UV Light Reminder  
This selection allows the installer to select the number of months after which the  
UV Light icon will be displayed to indicate to the homeowner that it is time to  
call the dealer to have the UV Lights replaced. Selections available are OF (off),  
6
, 12, 18, 24, 30, 36, 42, 48.  
OF (off) — The UV Light reminder is turned off and will never be displayed.  
3
7
6
-- 48 — The number of months after which the UV Light reminder will be  
displayed, “CHECK UV LIGHT”.  
Default is OF (off).  
Option 29 — Humidifier Pad Reminder  
This selects the number of months after which the Humidifier Pad Reminder  
icon will be displayed. This is not based on run time.  
OF (off) — The Humidifier Pad Reminder is disabled and will never be  
displayed.  
1
-- 24 — The number of months after which the Humidifier Pad Reminder icon  
will be displayed, “CHECK HUM PAD”.  
Default is OF (off).  
Option 30 — Programmable Fan (programmable models only)  
This selection allows the homeowner to program the fan selection to “Auto” or  
“On” fan operation for each of the program schedule periods. This selection is  
only available on programmable Thermidistat Controls.  
OF (off) — Programmable fan is disabled and the homeowner must manually  
select “Auto” or “On” for fan operation.  
On — Programmable fan is enabled. The homeowner can program “Auto” or  
“On” fan operation along with the heat and cool setpoints for each programmed  
period. When the program schedule is running, the programmed heat setpoint,  
cool setpoint, and fan selection for that period will be used. If the homeowner  
“overrides” the programmed fan setting by pressing the fan button, the override  
selection will remain in effect until the next programmed period time.  
Default is OF (off).  
3
8
Option 31 — Daylight Savings Time Configuration (programmable models  
only)  
This selection allows the installer to set the Thermidistat Control to automatically  
change by one hour on the specified day, month, and week specified.  
OF (off) — Daylight Savings Time Function disabled.  
1
,2 On — The first time the UP/DOWN button is pressed, the value of this  
selection changes from OF (off) to 1. When 1 is displayed, the days of the week  
and clock digits will be turned on. The installer will set the start date (Spring) for  
Daylight Savings Time by setting the day of the week by selecting the  
appropriate triangle icon next to the days of the week, the month of the year will  
be set in the clock hours location (range 1 -- 12) and the week of the month will be  
set in the clock minutes location. The week of the month selections will be F, 2,  
3
, 4, and L for First, 2nd, 3rd, 4th, and Last. So for the first Sunday in April, the  
display would show SUN, 4, F. When 2 is displayed, the installer will then  
choose the end date for daylight savings time (Fall). To activate the function, the  
installer changes the “2” by pressing the up button and “On” is displayed. The  
setting shall be left “On” to enable the Daylight Savings Time function.  
Default is On (on).  
Option 32 — Furnace Heat Staging Control (available only when the  
Thermidistat Control is configured to operate AC or A2 equipment).  
1
— Thermidistat Control controls W1 output only and furnace controls the turn  
on and turn off of higher stages of heat.  
— Thermidistat Control will control the W1 and O/W2/B outputs.  
Default is 1.  
2
3
9
Option 33 — Single or Two -- Piece Installation  
This configuration allows the Thermidistat Control to compensate for the  
amount of heat generated by the Thermidistat Control electronics to allow more  
accurate sensing of the temperature sensor. The amount of heat compensation  
will be different between single installation and two -- piece installation.  
Range: 1P or 2P  
1
2
P — The installation is single piece.  
P — The installation is two separate pieces.  
Default is 2P.  
Option 40 — Humidify Fan  
This selection controls whether humidification can only be done when a heating  
demand is present. If the homeowner turns humidification OFF, this  
configuration operates as if the selection was set to OFF.  
OF -- The humidity output will only energize when there is a humidity demand  
and the heating equipment is energized.  
On -- The humidity output and the fan will energize anytime humidification is  
needed during heating mode regardless of the state of the heating equipment.  
Factory default is OF (Off)  
Option 41 — Variable Speed Blower  
This selection allows the installer to select between a single speed or variable  
motor. In a system with a two speed compressor (A2, h2, H2), if a  
dehumidification demand exists and the compressor is energized for cool to  
dehumidify, cooling, or both, and the system has a PSC blower (Option 41 =  
OFF), then both Y/Y2 and Y1/W2 are energized.  
Off -- The system has a single speed (PSC) blower.  
4
0
On -- The system has a variable speed blower.  
Factory default is OF (Off)  
Option 42 — Variable Speed Super Dehumidification  
This option will only be available if the Variable Speed Blower setup (Option  
4
1) has been set to ON.  
OF -- The fan output (G) is energized when the compressor is on for cool to  
dehumidify functionality.  
On -- The fan output (G) is de -- energized when the compressor is running for  
cool to dehumidify functionality. In this setup the fan will run at very low speed  
because a Y/Y2 or Y1/W2 is present but the G signal is not. The fan output (G)  
will be energized any time the compressor is energized in response to a cooling  
demand.  
Factory default is OF (Off)  
Option 43 — Intelligent Heat Staging  
This function is only available if the equipment configuration is a single speed  
heat pump (Option 01 = HP) and the thermostat is a Tx -- PRH or Tx -- NRH  
model. The Y1/W2 output, which energizes the second stages of heat, is only  
populated on these models.  
Off -- Electric heat will not be staged.  
On -- Three stages of electric heat will be staged.  
This switch should be set to On if the HVAC equipment has two banks of strip  
heaters. When electric heat is required, the thermostat will energize the smallest  
bank first (W1 only), then the larger bank (turning the smaller bank off -- Y1/W2  
only), and then both banks together (both W1 and Y1/W2). When power is  
cycled to the thermostat, this unit configuration will be displayed as HS.  
Factory defaults is OF (Off)  
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Option 44 — Super Comfort Heat  
This option is only available on heat pump units HP (HP, H2, hh, and h2) when  
Option 41 (Variable Speed Blower) is set to On and the system has a valid OAT  
sensor.  
OF (Off) -- Comfort Heat is off  
On -- Comfort Heat feature is on.  
If the outdoor air temperature is between 12 -- 40_F / -- 1 1 -- 4 _C and the  
compressor is running in heating, then the fan output is turned off. This will  
signal the variable speed blower to reduce the air speed. The fan output is turned  
off even if the user has the fan selection set to continuous fan. The fan output  
will be turned back on in this temperature range if the maximum capacity of  
auxiliary heat is on due to system demand (auxiliary heat on in response to a  
defrost signal shouldn’t cause the fan to turn back on).  
If the outdoor air temperature is below 12_F/ -- 11_C and there is sufficient  
demand for the equipment to be on, then the fan output is turned back on and the  
W/W1 output is energized. In a two speed unit the Y/Y2 output should be  
energized in addition to the W/W1 output. This logic does not apply to a hybrid  
heat system. In the unlikely event that the installer has selected a heat pump  
lockout temperature (Option 09) of 5_F/ -- 15_C in a hybrid heat system and the  
comfort heat feature is on, then the comfort heat feature will turn the W/W1 on  
and the compressors off when the outdoor air temperature drops below  
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2_F/ -- 11_C instead of at the lower temperature of 5_F/ -- 15_C.  
NOTE: All temperature boundaries have a +/ -- 2_ hysteresis  
Factory default is OF (Off).  
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Option 99 — Reset to Factory Defaults  
Use this capability to reset the Thermidistat Control to “out of the box”  
conditions. BEWARE! All configuration settings, program settings, clock, and  
calendar which have been manually entered will be lost!  
When this option is selected, the configuration number (99), will appear on the  
left and 10 will appear on the right. To perform the reset, first use the MODE key  
to move the box from the 99 to the 10 (programmable model) or to flash the 10  
(non -- programmable model). Then press and hold the DOWN key. The 10 will  
start counting down toward zero. If the DOWN key is kept pressed until the  
count reaches zero, the reset will be performed. When the value reaches zero, the  
heat setpoint shall display -- -- . The cool setpoint shall display -- and the room air  
temperature shall display Fd. When the factory defaults have been restored, the  
Thermidistat Control will act as if power was cycled and return to normal  
operation. If the DOWN key is released early, the number will return to 10 and  
the reset will not occur.  
SYSTEM START -- UP AND CHECKOUT  
The Thermidistat Control is designed with a built -- in installer test capability. It  
allows easy operation of equipment without delays or setpoint adjustments to  
force heating or cooling. To enable installer test mode, press and hold the fan  
button for 15 seconds. After 10 seconds, the Thermidistat Control will enter  
Configuration Mode. Continuing to hold the Fan button through 15 seconds will  
cause the Thermidistat Control to enter Installer Test Mode. Pressing the Mode  
button will change the system operating mode to test the heating and cooling  
equipment. Auto Mode is not available during Installer Test Mode. If no buttons  
are pressed for 15 minutes, the installer test mode will be terminated. Pressing  
DONE at any time will exit installer test mode.  
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Heat -- The first stage of heating will be energized for three minutes, then the first  
and second stages (if a second stage exists) will turn on for an additional three  
minutes. During the first stage of heating, the HEAT ON icons will be displayed.  
During the second stage of heating (if one exists), the “2” next to the “On” will  
be displayed if the system has a two -- stage compressor (A2, h2, or H2 unit  
types). The “auxiliary heat on” icon will be displayed if the second stage is  
electric heat (HP unit type). For Hybrid Heat installation or heat pump  
installation, only 1 stage of auxiliary heat is available. Any staging of auxiliary  
heat must be managed by the furnace or fan coil. While the heating test is active,  
the humidify output can be toggled. On the programmable models, pressing the  
button below the humidify icon shall toggle the state of the humidify output. On  
the non -- programmable models, pressing the features button shall toggle the state  
of the humidify output.  
Installer test for cooling is the same as described for heating above. COOL ON  
will be displayed during cooling in Installer Test Mode. While the cooling test is  
active, the dehumidify icon shall be displayed if the dry contact has been  
configured as a DH output. On the programmable models, pressing the button  
below the dehumidify icon shall toggle the state of the dry contact output. On the  
non -- programmable models, pressing the features button shall toggle the state of  
the dry contact.  
In a heat pump application, when the mode is set to “em heat” the auxiliary heat  
will turn on for 3 minutes. The clock display will count down from 180 to 0  
during this test.  
TO TEST FAN  
Fan button switches FAN icon between AUTO and On. While On is displayed,  
G output will be energized, turning fan on. Allow up to 10 sec after button is  
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pressed for fan to turn On and off. On some fan coils, fan continues to operate  
for 90 sec after G signal is removed.  
Final Settings  
Be sure to press DONE to exit installer setup mode. If the system is to be left in  
operation after installation is complete, use MODE button to select between  
HEAT, COOL, or AUTO to provide desired operation of heating, cooling, or  
auto.  
On the programmable models, the default setpoints and programmed schedule  
conform to the Energy Starr requirements of the U.S. Department of Energy for  
both heating and cooling. These provide energy saving temperature settings.  
Refer to Table 1.  
Table 1 – Energy Star Default Schedule  
SCHEDULE  
Wake 6:00 AM  
Day 8:00 AM  
Evening 5:00 PM  
Sleep 10:00 PM  
HEAT  
COOL  
68_F/20_C  
60_F/16_C  
68_F/20_C  
60_F/16_C  
78_F/26_C  
85_F/29_C  
78_F/26_C  
82_F/28_C  
If the programmed schedule is to be used, make sure the triangle icon next to the  
FOLLOW SCHEDULE icon is turned on. Pressing the Schedule button will  
cycle the triangle icon through the FOLLOW SCHEDULE, HOLD and  
VACATION selections.  
If fixed temperatures are desired, use SCHEDULE button to turn on arrow icon  
next to HOLD. This will maintain setpoints, not allowing them to change with  
programmed schedule.  
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The FAN button may be used to select between AUTO (fan on only with  
equipment) and On (fan on continuously) fan modes. For further information on  
temperature selection and programming, refer to Homeowner’s Guide.  
Setting The Clock, Calendar, Daily Schedule, and Vacation  
Settings (programmable models only)  
To set the clock, press the SET button once. The Clock will be displayed at the  
bottom center of the screen. Use the soft keys to move the box around the digits  
to be set and the UP/DOWN buttons to change the setting. Concurrent presses of  
the set button will cycle through the calendar, daily schedule, and vacation  
settings.  
Calendar may be changed by using the soft keys to select the Month, Day, or  
Year. The UP/DOWN buttons are used to change the Month, Day, or Year setting  
when the box surrounds it. Day of the week (Mon -- Sun) is determined by  
calendar settings and is not directly adjustable.  
When changing daily schedule settings, the soft keys are used to set the days,  
period times, heating setpoints, and cooling setpoints. The UP/DOWN buttons  
are used to change the setting with the box around it. ALL PROGRAM  
PERIODS (WAKE, DAY, EVE, SLEEP) MUST OCCUR WITHIN THE SAME  
2
4 HOUR PERIOD.  
When changing Vacation settings, the soft keys are used to choose the selection  
to be adjusted and the UP/DOWN buttons are used to change the setting.  
Humidify setting may only be changed when heat mode is selected and  
Dehumidify setting may only be changed when cool mode is selected.  
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Humidity Control Features  
The various humidity control features of the Thermidistat Control are explained  
below. They are grouped into 2 sections, humidification and dehumidification.  
Instructions on how to select each feature are given at the end of each section.  
Humidification  
The Thermidistat Control directly connects to a standard 24VAC humidifier to  
control humidification in the home. A humidify setpoint between 10 and 46% in  
2
% increments relative humidity is selected by the homeowner, or all  
humidification can be turned off. When humidity in home drops below setpoint,  
humidifier will be turned on to raise humidity level. Humidification can only  
occur while heating. See Table 2 for reference.  
Table 2 – Humidification Selections  
HUMIDIFY SETPOINT  
SELECTION  
FAN DISPLAY  
DISPLAY  
10---46  
1 --- 9  
Normal Humidify  
Auto Humidify  
Humidify Off  
Blank  
AUTO  
Blank  
OF (Off)  
1
. Humidify  
In normal humidify, humidifier will be on if there is humidity demand  
and any heating equipment is on. This will include furnace, heat pump, or  
auxiliary heat.  
2
. Auto Humidify  
Thermidistat Control will automatically adjust the humidity setpoint ac-  
cording to the outdoor temperature. As the outdoor temperature de-  
creases, the humidity setpoint also decreases. Settings ranging from 1 to  
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, 1 being the lowest and 9 the highest, will be visible to the homeowner.  
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See Fig. 16 for outdoor temperature/indoor humidity relationship in auto  
humidify mode.  
3
. Humidify Off  
The humidify function can be turned off completely. This does not re-  
quire changing existing setpoints.  
To Select Humidification (programmable)  
Press the soft key below the humidify icon to bring up humidity select screen.  
Humidify options are only available when in Heating mode. When system is in  
AUTO mode, humidify options are available if the last system operation was a  
call for heat.  
To Select Humidification (non -- programmable)  
Press the features button twice. The first press displays the outdoor air  
temperature and the second press displays the humidity value and humidify  
target.  
Pressing the mode button shall cycle through the available humidification  
selections (Off, Humidify and Auto Humidify).  
Additional Humidify Comments  
The humidifier is actually turned on when humidity is 1% below setpoint and  
turned off when it reaches 1% above setpoint. This built -- in hysteresis prevents  
humidify output from toggling on and off when humidity level is near setpoint.  
Dehumidification  
Dehumidification is done only during cooling. Depending on type of equipment  
used, compressor speed, blower speed, setpoint adjustment, and equipment  
cycling are modified to provide added dehumidification. A dehumidification  
setpoint (separate from humidification setpoint) is available to the homeowner. It  
can range from 46% to 66% relative humidity. When actual humidity is higher  
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than setpoint, a dehumidification demand exists. The Thermidistat Control  
responds by activating the dry contact (when enabled in Option 19). It may also  
control the compressor and blower, depending on equipment type and  
dehumidify selection choice. The 3 available selections are described below. A  
mandatory 5 minute blower off delay will be enforced if there has been a call for  
dehumidification during a cooling call. The amount of extra dehumidification  
available is very dependent on the type of equipment in the home. Without a  
variable -- speed blower, the system’s ability to adjust dehumidification is very  
limited.  
1
. Normal Dehumidify Operation  
When normal dehumidify is selected, the compressor will not turn on  
without a cooling demand. If dehumidify demand exists while cooling,  
dry contact will also be active (24VAC removed). This output commands  
variable -- speed blowers to reduce their airflow, which improves water re-  
moval from the cooled air.  
2
. Cool to Dehumidify  
The cool to dehumidify selection tells the system to operate the compres-  
sor, within limits, when there is a dehumidify demand even if there is no  
cooling demand. The limits are that the system may overcool up to 3_,  
but no more, while attempting to satisfy a dehumidify demand. Within  
this 3_ range, there is an additional balance between overcooling and hu-  
midity satisfaction. When overcooling must occur, the dehumidify set-  
point is adjusted upward by 2% per degree of overcooling. For example,  
a cooling setpoint of 76_F/24_C and a dehumidify setpoint of 60% is  
equivalent to a cooling setpoint of 75_F/24_C and a dehumidify setpoint  
of 62%. This dehumidify setpoint change is internal to the Thermidistat  
Control and is not shown on the display.  
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A06599  
Fig. 16 -- Auto Humidity  
3
. Dehumidify Off  
Dehumidification can be turned off completely. This can be done without  
changing existing setpoints.  
To Select Dehumidification (programmable -- between NORMAL, COOL  
TO, and OFF)  
Press the soft key below the dehumidify icon button to bring up dehumidify  
selections. Dehumidify options are only available when in Cooling mode. When  
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system is in AUTO mode, dehumidify options are available if the last system  
operation was a call for cooling.  
To Select Dehumidification (non -- programmable -- between NORMAL,  
COOL TO, and OFF)  
Press the features button three times. The first press displays the outdoor air  
temperature, the second press displays the humidify options and the third press  
will display the current dehumidify selections.  
The mode button is used to cycle through the dehumidify selections.  
Additional Dehumidify Comments  
Dehumidification can be enhanced (with some efficiency loss) by turning blower  
off immediately at the end of each cooling cycle (eliminating normal 90 sec  
blower off delay). Where maximum humidity removal is desired, this should be  
done. Fan coils have the capability of removing this off delay. On FK or FV Fan  
Coils, set delay tap to 0/0. On standard fan coils, a jumper can be cut to disable  
off delay. Refer to fan coil Installation Instructions for details. If FAN is set for  
continuous operation (fan On icon displayed), G output is turned off for 5  
minutes at the end of each cooling cycle as long as dehumidify demand exists.  
Like humidify, dehumidify actions are initiated when humidity is 1% above  
setpoint and are terminated when humidity drops to 1% below setpoint. This  
prevents unnecessary toggling of dehumidify actions when humidity is near  
setpoint.  
Dehumidify Output and Equipment Connections  
When there is a dehumidify demand, dry contact is activated, meaning that a  
2
4VAC signal is removed from the DHUM or DH output terminal. In other  
words, dehumidify output logic is reversed -- output is turned On when no  
dehumidify demand exists and is turned OFF when demand exists.  
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Bryant FK and FV series variable -- speed fan coils, all variable -- speed furnaces,  
and select single and multi -- stage furnaces with the dehumidify connection have  
dehumidify inputs which connect directly to Thermidistat Control dry contact.  
Refer to the furnace literature for dehumidification options.  
The FK and FV series fan coils have a terminal marked DH which should be  
connected to the Thermidistat Control dry contact output. Jumper J1 on fan coil  
MUST be removed. It is located behind the DH terminal. Additionally blower  
delay tap on fan coil should be set to 0/0 (no On delay and no OFF delay) when  
using cool to dehumidify. With this selection, the blower stops when G signal is  
removed, preventing re -- evaporation of water from the coil which would occur  
during the normal 90 sec blower off delay. See fan coil installation instructions  
for more information. (See Wiring Diagram Reference Chart and Fig. 2 through  
2
0 in Wiring Diagram section at the back of this piece literature.)  
The furnace dehumidify input acts differently depending on which style of  
variable speed, select single -- stage or multi -- stage furnace control you have.  
Vacation (programmable models only)  
A vacation selection is available specifically for times where the home will not  
be occupied for an extended period. Vacation mode has an automatic hold,  
meaning that setpoints are not affected by the programmed schedule. Vacation  
mode is active for a specified period of time. While in vacation mode, the system  
provides temperature and humidity protection for the home in the selected mode,  
but not comfort. When vacation mode is active, an arrow will be displayed  
beside “VACATION” in the upper left corner of the display.  
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Vacation Setpoints  
A special set of temperature and humidity setpoints exist which are active in  
vacation mode. They are adjustable by the homeowner, are exclusively for  
vacation mode, and are remembered from one vacation selection to the next. See  
Table 3 for default values.  
Table 3 – Vacation Setpoints Default Values  
MODE  
Fan  
Heat Setpoint  
Cool Setpoint  
Humidify Setpoint  
Dehumidify Setpoint  
AUTO  
Auto  
55  
85  
20  
60  
Vacation Humidification  
Normal humidify is available using vacation setpoints. Auto humidification is  
available, adjusting its setpoint with outdoor temperature the same as when  
occupied. Vacation humidification can be turned off independently of occupied  
humidification. While setting the Vacation setpoints, the Vacation humidify  
setpoint is accessible by pressing the soft key below the humidify icon when the  
box is around the heating setpoint.  
Vacation Dehumidification  
Normal Dehumidify, Cool to Dehumidify, and Dehumidify OFF are all available  
in vacation mode, and selection of one of these can be different from that of  
occupied. Vacation dehumidification selection and setpoints are remembered the  
next time vacation is used. While setting Vacation setpoints, the Vacation  
dehumidify setpoint is accessible by pressing the soft key below the dehumidify  
icon when the box is around the cooling setpoint.  
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OPERATIONAL INFORMATION  
Timers  
Five -- Minute Compressor Timeguard  
This timer prevents compressor from starting unless it has been off for at least 5  
minutes. It can be overridden for 1 cycle by simultaneously pressing FAN and  
UP buttons.  
Cycle Timer  
Based on the selection of 2, 4, or 6 cycles per hour, this timer is set to 30, 15, or  
1
0 minutes. This much time must elapse from the start of one cycle before  
another cycle can start. It serves to impose the cycles per hour limits. It can be  
defeated for one cycle by simultaneously pressing the FAN and UP buttons.  
Ten -- Minute Staging Timer  
In multistage heating or cooling, this timer prevents any higher stage from  
turning on until preceding stage has been on for 10 minutes. When staging  
between compressor and electric heat or between compressor and furnace heat,  
the time is configurable. The timer is configurable via Option 17. This timer is  
overridden if temperature error is greater than 5_ (usually due to a large change  
in desired temperature) and equipment stages up in 60 second intervals.  
Defrost  
When defrost occurs in a Hybrid Heat system, the furnace will operate during the  
defrost cycle. At the end of the defrost cycle, the furnace and heat pump will be  
de -- energized while the fan is energized for 2 minutes allowing the heat  
exchanger to cool down. At the end of the 2 minute time, the heat pump will be  
re -- energized if a call for heat still exists.  
Detection of defrost will not work properly if the installer has configured the  
O/W2/B output to function as a B output. During heat pump heating, a defrost  
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signal shall be considered valid if the compressor output is energized and the  
defrost signal has been active for less than 15 consecutive minutes. Any defrost  
signal present for longer than 15 minutes shall be considered invalid.  
Heat pump/fan coil and hybrid heat systems shall use this input to:  
S
Detect that defrost is in progress and energize the auxiliary heat to  
provide homeowner comfort during the defrost cycle  
S
Allow a defrost cycle to run to completion regardless of the system  
demand  
Three -- Minute Minimum on Time  
In normal operation, when a stage turns on, it will not turn off for a minimum of  
3
minutes. If the setpoint is changed, this timer is canceled, allowing the  
equipment to turn off immediately when the demand is removed.  
Heat/Cool Setpoints (Desired Temperature)  
A minimum difference of 1_ and maximum of 6_ is enforced between heating  
and cooling desired temperatures. This is done by allowing 1 setting to “push”  
the other, to maintain this difference. This difference is adjustable via  
Configuration Option 11.  
Equipment On Indicators  
When cooling equipment is on, a COOL ON icon is displayed. While cooling  
equipment operation is delayed by the time guard or cycle timer, COOL ON will  
flash. The same is true for HEAT ON icon.  
During second stage compressor operation a “2” will be displayed with the  
HEAT ON or COOL ON icon. This is displayed when the Thermidistat Control  
is configured as H2, A2, or h2.  
When the W is energized in a heat pump or Hybrid Heat system, the “auxiliary  
heat on” icon will be displayed.  
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Humidify and Dehumidify Indicators  
When the Display Module door is closed, the humidify icon will be displayed  
when humidification is active and the dehumidify icon will be displayed when  
dehumidification is active.  
Auto Changeover  
When auto changeover mode is selected, a change from heat to cool (or vice  
versa) will not occur until an opposite mode demand has existed for 20 minutes.  
If setpoint is changed, 20 -- minute requirement is deleted.  
Emergency Heat Mode  
When Thermidistat Control is configured as a heat pump and emergency heat is  
selected, all Y signals are locked out, and W becomes energized upon a call for  
heat.  
Programmable Fan (programmable models only)  
The fan output can be programmed based on period of the day. When  
programming for each day and period the fan can be set to On or AUTO.  
Dry Contact  
On the programmable models, the dry contact that can be used for control of an  
auxiliary device. The dry contact may be configured to be closed for a specific  
number of minutes per hour for each period of the program schedule. This can  
be used to operate a ventilator, damper, system blower, or other auxiliary device.  
There are two terminals, D1 and D2.  
On both the programmable and non -- programmable models, when configured as  
a dehumidify output, it will operate cooling equipment capable of dehumidify  
function. When configured for dehumidification, the Rc terminal must be  
connected to one of the dry contact terminals. The other dry contact terminal is  
connected to the dehumidify terminal on the furnace or fan coil. This provides  
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power to energize the dehumidify terminal on the cooling equipment when the  
dry contact is closed.  
If it is desired to operate a ventilator or other device, the D1 and D2 terminals  
can be connected directly to the equipment. This will provide a closed contact  
for the specified number of minutes per hour. See Option 19.  
If timed control of the system blower is required, the dry contact can be used for  
this function. The G terminal can be connected to one of the dry contact  
terminals with the other terminal being connected to Rc and/or Rh for timed  
control of the fan. Note that this is not the same as programmable fan Option 30.  
See Wiring Diagrams for more information.  
TROUBLESHOOTING  
If the display module doesn’t power up after power is applied, check the Rc/Rh  
and C terminals for 24VAC. If 24VAC is present, check the voltage between Vg  
and V+. This voltage will be approximately 12 -- 20VDC. If voltage is present,  
check the polarity to make sure it is wired correctly. The display will not power  
up if polarity is reversed.  
Error Codes  
“
-- -- ” -- If Thermidistat Control cannot properly read room temperature, display  
will indicate “ -- -- ” and all outputs (except fan, if on) will turn off. In the case  
where the installer has selected to average the local sensor and the remote room  
sensor, the Thermidistat Control display will alternate between “ -- -- ” for the  
failed sensor and the temperature sensed by the working sensor every 10  
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7
seconds. The control will operate from the temperature sensed by the working  
sensor.  
E1 -- If the Display Module and the Equipment Control Module cannot  
communicate via two -- wire connection, an E1 will be displayed.  
E2 -- There is no E2 error message.  
E3 -- If Thermidistat Control cannot properly read outdoor temperature, and it is  
needed for proper operation, display will indicate “ -- -- ” in the outdoor  
temperature location. If Option 06, 08, 09, 22, 23 or 44 is not set to OFF, display  
will indicate “ -- -- ” in the outdoor temperature location.  
E4 -- If Thermidistat Control’s internal memory fails, E4 will be displayed.  
Replace Thermidistat Control.  
E5 -- If Thermidistat Control cannot properly read humidity, E5 will be  
displayed. Replace Thermidistat Control. If both Humidify and Dehumidify  
have been set to OF, the humidity value will be shown as “ -- -- ” when viewed  
from the humidity menu, but no E5 will be shown in the display.  
Table 4 can be used as a troubleshooting tool for determining which outputs will  
be active for a particular configuration and each operating mode.  
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Table 4 – Equipment Configuration Outputs  
EQUIP  
CONFIG  
OPTION 01  
EM  
HEAT  
STG 1  
EM  
HEAT  
STG 2  
FACTORY  
CONFIG  
COOL  
STG 1  
COOL  
STG 2  
HEAT  
STG 1  
HEAT  
STG 2  
HEAT  
STG 3  
HEAT  
STG 4  
SS AC  
AC  
Y/Y2  
-
W/W1  
-
-
-
-
-
W/W1  
O/W2/B  
(if  
HP  
SS AC  
Y/Y2  
-
W/W1  
-
-
-
-
2S  
Opt32=2)  
SS HP  
RVS = O  
Y/Y2,  
O/W2/B  
Y/Y2,  
W/W1  
HP  
HP  
-
-
Y/Y2  
-
-
-
-
W/W1  
W/W1  
-
-
Y/Y2,  
W/W1,  
O/W2/B  
SS HP  
RVS = B  
Y/Y2,  
O/W2/B  
Y/Y2  
SS HP  
RVS = O  
Opt43 = On  
Y/Y2  
W/W1  
Y1/W2  
Y/Y2,  
O/W2/B  
Y/Y2,  
W/W1  
Y/Y2  
Y1/W2  
W/W1  
Y1/W2  
2S  
-
-
Y/Y2  
W/W1  
W/W1  
Y/Y2,  
Y1/W2,  
W/W1  
SS HP  
RVS = B  
Opt43 = On  
Y/Y2,  
W/W1,  
O/W2/B  
Y/Y2,  
Y1/W2,  
O/W2/B  
Y/Y2,  
O/W2/B  
W/W1  
Y1/W2  
2S  
2S  
Y/Y2  
O/W2/B  
Y/Y2,  
Y1W2  
W/W1  
O/W2/B  
2
SPD AC  
SPD HP  
Y1/W2  
W/W1  
-
-
-
-
-
Y1/W2  
Y/Y2  
O/W2/B  
Y1/W2  
Y/Y2  
W/W1  
2
Y1/W2  
O/W2/B  
Y1/W2  
Y/Y2  
2S  
Y1/W2  
-
W/W1  
RVS = O  
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Table 4 -- Equipment Configuration Outputs (cont)  
EQUIP  
CONFIG  
OPTION 01  
EM  
HEAT  
STG 1  
EM  
HEAT  
STG 2  
FACTORY  
CONFIG  
COOL  
STG 1  
COOL  
STG 2  
HEAT  
STG 1  
HEAT  
STG 2  
HEAT  
STG 3  
HEAT  
STG 4  
Y1/W2  
Y/Y2  
O/W2/B  
W/1  
Y1/W2  
Y/Y2  
O/W2/B  
2
SPD HP  
Y1/W2  
Y/Y2  
Y1/W2  
O/W2/B  
2S  
Y1/W2  
-
W/W1  
-
RVS = B  
SS Hybrid  
Heat  
RVS = O  
SS Hybrid  
Heat  
Y/Y2,  
O/W2/B  
2S  
2S  
2S  
2S  
-
Y/Y2  
W/W1  
W/W1  
-
-
-
-
-
W/W1  
W/W1  
W/W1  
W/W1  
-
-
-
-
Y/Y2  
O/W2/B  
Y/Y2  
-
-
RVS = B  
2S Hybrid  
Y1/W2  
Y/Y2  
O/W2/B  
Y1/W2  
O/W2/B  
Y1/W2  
Y/Y2  
Heat  
Y1/W2  
W/W1  
W/W1  
RVS = O  
2S Hybrid  
Y1/W2  
Y/Y2  
O/W2/B  
If HP or  
2S board  
AND  
Y1/W2  
Y/Y2  
Y1/W2  
O/W2/B  
Heat  
RVS = B  
Y1/W2  
-
AC  
HP  
Heat Only  
Unit  
-
W/W1  
-
-
-
-
2S  
Opt32 = 2  
Cool Only  
Unit  
Cool Only  
Y1/W2  
Y/Y2  
2S  
Y1/W2  
Y/Y2  
-
-
-
-
-
-
-
-
-
-
-
AC  
HP  
-
-
Unit  
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WIRING DIAGRAMS  
Display module  
wall mount  
Display module  
Equipment Control Module  
Fan Coil  
Heat Pump  
V+  
Vg  
V+  
Vg  
V+  
Vg  
V+  
Vg  
O
W3  
W2  
Y
O
RVS/Heat Stage 2  
Heat Stage 1  
O/B W2  
W/W1  
Y/Y2  
Y1 / W2  
G
W2  
Compressor  
Y
R
Fan  
G
R
24VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
24VAC Common  
C
C
C
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
OAT  
RRS  
Outdoor Sensor *  
SRTN  
Remote Room  
Sensor *  
A08151  
Fig. 17 -- Display to Equipment Control Module Connection  
*
Indicates connection may not be required/available.  
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Equipment Control Module  
Fan Coil  
Heat Pump  
O
W1  
W2  
Y1  
O
RVS Cooling  
Heat Stage 3  
Heat/Cool Stage 1  
Heat/Cool Stage 2  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W1  
Remove J2  
jumper for  
heat staging  
Y1  
Y/Y2  
G
Y/Y2  
24VAC Hot Heating  
Rh  
R
R
2
4VAC Hot Cooling  
Rc  
Remove J1  
jumper for  
Dehumidify  
modes  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DH  
C
2
4VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Valve *  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08123  
Fig. 18 -- FV/FK Fan Coil with 2 -- Stage Heat Pump  
*
Indicates connection may not be required/available.  
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Typical  
Fan Coil  
Single-Stage  
Heat Pump  
Equipment Control Module  
O
RVS Cooling  
Heat Stage 2  
Heat Stage 3  
Heat/Cool Stage 1  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
E
W2  
W2  
W3  
Y
R
G
R
24VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
24VAC Common  
C
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08124  
Fig. 19 -- Typical Fan Coil with Heat Pump  
*
Indicates connection may not be required/available.  
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Equipment Control Module  
RVS/Heat Stage 2  
Heat Stage 1  
Compressor Low  
Compressor High  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W3  
W2  
G
R
24VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
Aux. Connection  
24VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08125  
Fig. 20 -- Fan Coil Shown w/Aux. Connection #1  
Heat Pump/Air Conditioner removed for clarity.)  
(
*
Indicates connection may not be required/available.  
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Equipment Control Module  
Fan Coil  
Air Conditioner  
O
W2  
W1  
Y1  
Remove J2  
Jumper for  
heat staging  
Heat Stage 2  
Heat Stage 1  
Cool Stage 1  
Cool Stage 2  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
Y1  
Y2  
Y/Y2  
G
24VAC Hot Heating  
Rh  
R
R
2
4VAC Hot Cooling  
Rc  
Remove J1  
jumper for  
Dehumidify  
modes  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DH  
C
2
4VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08126  
Fig. 21 -- FV/FK Fan Coil w/2 -- Stage Air Conditioner  
*
Indicates connection may not be required/available.  
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Typical  
Fan Coil  
Single-Stage  
Air Conditioner  
Equipment Control Module  
O
E
Heat Stage 2  
Heat Stage 1  
N/A  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W3  
W2  
Y
Cool Stage 1  
Fan  
Y
R
G
24VAC Hot Heating  
Rh  
R
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
24VAC Common  
C
C
C
*
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08127  
Fig. 22 -- Typical Fan Coil with Air Conditioner  
*
Indicates connection may not be required/available.  
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Equipment Control Module  
Fan Coil  
RVS/Heat Stage 2  
Heat Stage 1  
Compressor Low  
Compressor High  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W3  
W2  
G
R
24VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
Aux. Connection  
24VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08128  
Fig. 23 -- Fan Coil Shown with Aux. Connection #2  
Heat Pump/Air Conditioner removed for clarity.)  
(
*
Indicates connection may not be required/available.  
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Equipment Control Module  
Fan Coil  
O
Heat Pump  
O
RVS Cooling  
Heat Stage 2  
Heat Stage 3  
Heat/Cool Stage 1  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W2  
Remove J2  
Jumper for  
heat staging  
W1  
W2  
Y/Y2  
G
Y
24VAC Hot Heating  
Rh  
R
R
2
4VAC Hot Cooling  
Rc  
Y1  
Remove J1  
Jumper for  
Dehumidify  
modes  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DH  
C
2
4VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08129  
Fig. 24 -- FV/FK Fan Coil with 1 -- Stage Heat Pump  
*
Indicates connection may not be required/available.  
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Typical  
Fan Coil  
Equipment Control Module  
RVS/Heat Stage 2  
Heat Stage 1  
Compressor Low  
Compressor High  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
E
W2  
G
R
24VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
24VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08130  
Fig. 25 -- Typical Fan Coil Heating Only  
*
Indicates connection may not be required/available.  
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Equipment Control Module  
RVS/Heat Stage 2  
Heat Stage 1  
Compressor Low  
Compressor High  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
G
R
24VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
24VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
A08131  
Fig. 26 -- Thermidistat Control w/Dry Contact Control for Fan Run Time  
*
Indicates connection may not be required/available.  
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Equipment Control Module  
Fan Coil  
Air Conditioner  
O
W2  
W1  
Y1  
Remove J2  
Jumper for  
heat staging  
Heat Stage 2  
Heat Stage 1  
N/A  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
Heat/Cool Stage 1  
Fan  
Y/Y2  
G
Y
R
2
4VAC Hot Heating  
Rh  
R
Remove J1  
Jumper for  
Dehumidify  
modes  
2
4VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DH  
C
2
4VAC Common  
C
C
*
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08132  
Fig. 27 -- FV/FK Fan Coil with 1 -- Stage Air Conditioner  
*
Indicates connection may not be required/available.  
7
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Typical  
Fan Coil  
Single-Stage  
Air Conditioner  
Equipment Control Module  
RVS/Heat Stage 2  
Heat Stage 1  
Compressor Low  
Compressor High  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
Y
R
G
R
24VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
*
24VAC Common  
C
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08133  
Fig. 28 -- Typical Fan Coil Cooling Only  
*
Indicates connection may not be required/available.  
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Variable Speed/Multi-Stage  
Furnace  
Equipment Control Module  
Heat Pump  
O
RVS Cooling  
Heat Stage 3 (furnace)  
Heat/Cool Stage 1  
Heat/Cool Stage 2  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W2  
W/W1  
W2  
Y1  
*
Y/Y2  
G
Y/Y2  
2
4VAC Hot Heating  
Rh  
R
R
C
2
4VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DHUM  
COM  
24VAC Common  
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08134  
Fig. 29 -- Variable Speed/Multi -- Stage Furnace with 2 -- Stage Heat Pump  
*
Indicates connection may not be required/available.  
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Single-Stage  
Furnace  
Single-Stage  
Heat Pump  
Equipment Control Module  
O
RVS Cooling  
Heat Stage 2 (furnace)  
N/A  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W
W2  
Y
*
Heat/Cool Stage 1  
Fan  
Y
G
R
24VAC Hot Heating  
Rh  
R
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DHUM  
COM  
2
4VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08135  
Fig. 30 -- Single -- Stage Furnace with Heat Pump  
Hybrid Heat)  
(
*
Indicates connection may not be required/available.  
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Variable Speed/Multi-Stage  
Furnace  
Equipment Control Module  
Air Conditioner  
Heat Stage 2  
Heat Stage 1  
Cool Stage 1  
Cool Stage 2  
Fan  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W2  
W1  
Y1  
Y/Y2  
G
Y/Y2  
2
4VAC Hot Heating  
Rh  
R
R
C
2
4VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DHUM  
COM  
24VAC Common  
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08136  
Fig. 31 -- Variable Speed/Multi -- Stage Furnace w/2 -- Stage Air Conditioner  
*
Indicates connection may not be required/available.  
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Single-Stage  
Furnace  
Single-Stage  
Air Conditioner  
Equipment Control Module  
N/A  
Heat Stage 1  
N/A  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W
Cool Stage 1  
Fan  
Y
G
R
Y
R
2
4VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DHUM  
COM  
2
4VAC Common  
C
C
*
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08137  
Fig. 32 -- Single -- Stage Furnace with Air Conditioner  
*
Indicates connection may not be required/available.  
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Variable Speed/Multi-Stage  
Furnace  
Equipment Control Module  
Heat Pump  
O
RVS Cooling  
Heat Stage 3 (furnace)  
Heat Stage 2 (furnace)  
Heat/Cool Stage 1  
Fan  
O/B W2  
Y1 / W2  
W/W1  
Y/Y2  
G
W2  
W1  
Y1  
W2  
Y/Y2  
G
Y
R
24VAC Hot Heating  
Rh  
R
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DHUM  
COM  
2
4VAC Common  
C
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08138  
Fig. 33 -- Variable Speed/Multi -- Stage Furnace w/Single -- Stage Heat Pump  
*
Indicates connection may not be required/available.  
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Single-Stage  
Furnace  
Equipment Control Module  
N/A  
Heat Stage 1  
N/A  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W
N/A  
Fan  
G
R
2
4VAC Hot Heating  
Rh  
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DHUM  
COM  
2
4VAC Common  
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08139  
Fig. 34 -- Single -- Stage Furnace Heating Only  
*
Indicates connection may not be required/available.  
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Variable Speed/Multi-Stage  
Furnace  
Equipment Control Module  
Air Conditioner  
Heat Stage 2  
Heat Stage 1  
N/A  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W2  
W1  
Y1  
Cool Stage 1  
Fan  
Y/Y2  
G
Y
R
24VAC Hot Heating  
Rh  
R
24VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DHUM  
COM  
2
4VAC Common  
C
C
*
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08140  
Fig. 35 -- Variable Speed/Multi -- Stage Furnace with Single -- Stage  
Air Conditioner  
Indicates connection may not be required/available.  
*
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Single-Stage  
Furnace  
Equipment Control Module  
Air Conditioner  
Heat Stage 2  
Heat Stage 1  
N/A  
O/B W2  
W/W1  
Y1 / W2  
Y/Y2  
G
W1  
Y1  
Cool Stage 1  
Fan  
Y/Y2  
G
Y
R
C
2
4VAC Hot Heating  
Rh  
R
2
4VAC Hot Cooling  
Rc  
Dry Contact 1  
D1  
Dry Contact 2  
D2  
DHUM  
COM  
24VAC Common  
C
Humidify  
HUM  
OAT  
RRS  
SRTN  
Humidifier Solenoid  
Valve *  
Outdoor Air Temp  
Remote Room Sensor  
OAT/RRS Com  
Outdoor Sensor *  
Remote Room  
Sensor *  
A08160  
Fig. 36 -- Single -- stage Furnace with Air Conditioner and Split Power  
*
Indicates connection may not be required/available.  
NOTE: Rc/Rh jumper is cut on the Equipment Control Module.  
8
0
THERMIDISTAT CONTROL CONFIGURATION  
RECORD  
Installer  
________________________  
Model Number  
______________________________  
Date  
_
_________________________  
A. Hardware Configuration  
_________ Seal Hole In Wall  
B. Mode Settings  
_
_
_
_
_
_________  
_________  
_________  
_________  
Mode (Off, Heat, Cool, Auto, Em Heat)  
Heating Setpoint Value  
Cooling Setpoint Value  
Fan (Auto or On)  
C. Home, Away, Sleep Settings  
Heat Cool  
Home  
_
_
_
___ ____  
___ ____  
___ ____  
Away  
Sleep  
D. Schedule (For Programmable Thermidistat Controls)  
Period 1 Period 2  
Period 3  
Period 4  
Time Heat Cool Time Heat Cool Time Heat Cool Time Heat Cool  
All Days  
_
_
_
___ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____  
___ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____  
___ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____ ____  
Weekdays  
Weekend  
8
1
E Configuration Options  
Equipment Type  
Option 01  
Option 02  
Option 03*  
Option 04  
Option 05  
Option 06  
Option 07  
Option 08  
Option 09  
Option 10  
_
_
_
_
_
_
_
_
_
_
_
____  
____  
____  
____  
____  
____  
____  
Clean Filter Timer Adjustment  
Fahrenheit/Centigrade Selection  
Fan (G) on with W/W1 Selection  
Room Air Temperature Sensing (programmable models only)  
Cooling Lockout Below 55_F/13_C Selection (only available if outdoor air sensor is present)  
Zoning  
Auxiliary Heat Lockout Temperature Setting (only available when heat pump is used and when outdoor air  
____ temperature sensor is present)  
Heat Pump Lockout Temperature  
____  
Reversing Valve  
____  
Option 11  
Option 12  
Option 13  
Adjustable Setpoint Deadband (not available on Heat Only and Cool Only systems)  
____  
_____ Smart Recovery (programmable models only)  
Room Air Temperature Offset Adjustment  
_____  
_____  
_____  
_____  
_____  
_____  
Option 14  
Option 15  
Option 16  
Option 17  
Option 18*  
Humidity Offset Adjustment  
Enable Auto Mode  
Cycles Per Hour  
Time Between Stages  
Backlight Configuration  
8
2
E Configuration Options (cont)  
Dry Contact (programmable models only)  
Option 19  
Option 20  
Option 21*  
Option 22  
Option 23  
Option 24*  
Option 25*  
Option 26  
Option 27  
Option 28  
Option 29  
Option 30*  
Option 31*  
Option 32  
Option 33  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
_____  
Outdoor Air Temperature Offset Adjustment  
Keypad Lockout  
High Cool Latch Temperature  
High Heat Latch Temperature  
Programmable/Non-Programmable (programmable models only)  
Number of Programmable Periods Per Day (programmable models only)  
Minimum Cooling Setpoint  
Maximum Heating Setpoint  
UV Light Reminder  
Humidifier Pad Reminder  
Programmable Fan (programmable models only)  
Daylight Savings Time Configuration (programmable models only)  
Furnace Heat Staging  
Single or Two-Piece Installation  
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E Configuration Options (cont)  
Option 40  
Option 41  
Option 42  
Option 43  
Option 44  
Option 99  
Fan Humidity  
_____  
_____  
_____  
_____  
_____  
_____  
Variable Speed Blower  
Variable Speed Super Dehumidification  
Intelligent Heat Staging  
Super Comfort Heat  
Reset to Factory Defaults  
*
Options with an asterisk can also be set/changed by the homeowner.  
E2008 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231  
Printed in U.S.A.  
Edition Date: 03/08  
C a t a l o g N o : I I T 6 --- P R H --- 0 3  
Manufacturer reserves the right to change, at any time, specifications  
and designs without notice and without obligations.  
R e p l a ce s: IIT6 --- P R H --- 0 2  
8
4

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