Carrier 4850TJ Thermostat User Manual

Home

48/50HJ004-024

0TFQ004-012, 48/50TF,TM004-014

0HJQ004-016, 48/50TJ,TM016-028

Apollo Control

Installation, Operation, and

Troubleshooting Instructions

SAFETY CONSIDERATIONS

The TEMP System thermostat maintains proper tempera-

tures by controlling the amount of heated or cooled air supplied

to the area in which it is installed or the area it controls (if using

a remote room sensor).

Read these instructions entirely before modifying the base

rooftop unit.

Each thermostat is responsible for controlling the tempera-

ture conditions in its space. Each thermostat will maintain its

own independent occupied/unoccupied time schedule and heat-

ing (if applicable) and cooling set points. This allows the user

to program the TEMP System thermostat so that it will main-

tain different temperature ranges at different times.

Before beginning any modification, make sure all power is

disconnected to the unit and locked out. Failure to discon-

nect power supply prior to servicing may result in serious

injury. All wiring must comply with applicable national

and local codes.

TEMP System Components — The Carrier TEMP

System consists of one or more thermostats that communicate

by way of a communication bus. Each thermostat controls an

Apollo control which in turn controls the Carrier rooftop unit.

See Fig. 1.

Each thermostat can be connected to others to provide com-

munication between thermostats. Only one thermostat per sys-

tem can have a timeclock that will broadcast time to the rest of

the system. See Fig. 2.

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should

install, repair, or service air-conditioning equipment.

Untrained personnel can perform the basic maintenance

functions of replacing filters. All other operations should be

performed by trained service personnel. When working on air-

conditioning equipment, observe precautions in the literature,

tags and labels attached to the unit, and other safety precautions

that may apply.

TEMP SYSTEM THERMOSTATS — The 33CSTMT-01,

or 33CSVMT-XX (with timeclock) and 33CSTM-01 or

3CSVM-XX (without timeclock) TEMP System thermostats

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloth for unbrazing operations. Have

fire extinguishers available for all brazing operations.

(

see Fig. 3) have the following features:

•

controls temperature to user-defined set points

eliminates the need for external timeclocks, manual

override timer, night low limit thermostat, battery

backup, or unit time guard

•

operates with 3 system switches for supply-air fan and

the unit heating (if applicable) and cooling stages

When removing panels from the unit, be careful not to

damage the roof or other surfaces with the panels.

NOTE: For 33CSVM(T)-XX thermostats, the “XX” will be

either “04,” “16,” or “32.”

GENERAL

The Apollo control is a relay pack which is factory wired

and mounted in the Carrier rooftop unit. The Apollo control

allows the unit to be connected to a thermostat and a communi-

cation bus. The rooftop unit can then be used as part of a

system which is controlled by devices on the communication

bus. The thermostat and communication bus wiring must be

field installed.

Do not turn on unit power until Apollo control and thermo-

stat have been installed. Unit is shipped with loose leads

which may cause electrical shock or death.

HVAC

—

Heating, Ventilation, and Air Conditioning

Carrier TEMP System — The Carrier TEMP System

usually consists of more than one thermostat and can be ex-

panded to meet whatever number of single zone systems are

required.

Where “XX” will be “04,” “16,” or “32.”

Fig. 1 — Carrier TEMP System Components

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 534-80082 Printed in U.S.A. Form 48/50H,T-15SI Pg 1 8-01 Replaces: 48/50H,T-2SI

Book 1

Tab 1a 1b 5a 5a 6a 6b

APOLLO CONTROL — The Apollo control (see Fig. 4) has

the following features:

WIRING TO

APOLLO

CONTROL

WIRING

THERMOSTAT CONTROL

•

serves as interface between thermostat, Carrier rooftop

unit, and any external field-supplied sensors

•

0 vdc. This power is supplied by the Carrier rooftop

unit.

The Apollo control must be used in conjunction with a

Carrier 33CSTM(T)-01 or 33CSVM(T)-XX master thermo-

stat. Figure 5 shows the Apollo control factory-installed in a

rooftop unit.

Where “XX” will be “04,” “16,” or “32.”

Fig. 2 — TEMP System Communication

Fig. 5 — Apollo Control Factory-Installed

In Typical Unit

INSTALLATION

Wiring Requirements — The wiring requirements for

the TEMP System are:

THERMOSTAT TO THERMOSTAT COMMUNICATION

BUS — Use field-supplied, 18 gage, 3-conductor, shielded,

stranded wire, color coded (red, black, green), plenum rated (if

required by code). Be sure wire is long enough to run from

thermostat to thermostat in daisy-chain configuration.

THERMOSTAT TO APOLLO CONTROL — Use field-

supplied, 18 gage, 5-conductor, shielded, stranded wire,

color-coded (red, white, blue, yellow, green), plenum rated (if

required by code). Be sure wire is long enough to run from

thermostat to the Apollo control. The Apollo control is easily

accessible in the Carrier rooftop unit. It is found in the unit

control box.

Fig. 3 — TEMP System Thermostat

(

With Timeclock Shown)

IMPORTANT: Do not run the thermostat communication

bus and the control wire in the same conduit for more than

ft. Never run wires near any cable carrying AC voltage.

For further wiring information, consult your local Carrier

distributor.

Factory-supplied power required by each Apollo control is

4 vac/10 va. Typical wiring is 18-gage thermostat wire. Power

to the Apollo control may be wired to the Carrier rooftop unit

transformer if transformer is of sufficient va capacity. Other-

wise, a dedicated transformer has been factory provided. The

maximum load of a relay contact is 24 vac, 1 amp. A short in

the field wiring or Carrier rooftop unit will cause non-warranty

damage to the relay board. Test wiring before attaching to

Apollo control.

Call your local Carrier representative for more information

about wiring the Apollo control as needed.

NOTE: The indicator lights verify each mode of operation.

Fig. 4 — Apollo Control

Thermostat Installation — Begin the thermostat in-

stallation by determining where the thermostat will be located.

In most cases, this will be pre-determined by the building

plans.

Locate the thermostat on an interior wall, about 5 ft from the

ground. The thermostat should be located away from direct

sunlight, drafts, or interior heat sources which may influence

temperature readings.

The thermostat may also be mounted in a remote location

with the use of an optional remote room sensor. Refer to the

specific thermostat information for more details on thermostat

installation.

AUTO. Fan Mode — The fan will energize any time the

system energizes heating or cooling. The only exception is

when the thermostat controls a gas heating rooftop unit. In this

application, the thermostat will allow the rooftop unit to control

the fan during Heating mode, and the fan will run in Cooling

mode.

ON Fan Mode — The fan will operate continuously dur-

ing the occupied mode. In unoccupied mode, the fan will only

operate when a system mode is energized.

AUTO. Heating Mode — When the Heat switch is set to

AUTO. position, the Apollo control will energize heating when

the heating demand is 1.5° F or greater. The second stage of

heating will energize when the demand becomes 2.0° F or

greater.

Wiring Connections

OFF Heating Mode — When the Heat switch is set to

OFF position, the Apollo control will not allow the rooftop unit

to energize heating.

Electric shock can cause injury or death. Ensure power to

the rooftop unit has been disconnected, before wiring.

AUTO. Cooling Mode — When the Cool switch is set

to AUTO. position, the Apollo control will energize cooling

when the cooling demand is 1.5° F or greater. The second stage

of cooling will energize when the demand becomes 2.0° F or

greater.

WIRE APOLLO CONTROL TO THERMOSTAT — Wire

each thermostat to its respective Apollo control as shown in

Fig. 6. Make wiring connections at the wiring connector board

of the thermostat.

WIRE THERMOSTAT TO COMMUNICATION BUS —

The thermostat is connected to the communication bus through

the thermostat wiring connection block. Connect the black, red,

and green wires from the communication bus to the thermostat

wiring connection block. See Fig. 6. To connect other devices

to the communication bus, refer to the application manual for

that device.

OFF Cooling Mode — When the Cool switch is set to

OFF position, the Apollo control will not allow the rooftop unit

to energize cooling.

Temperature Trend Staging — When the Tempera-

ture Trend Staging option has been configured at the thermo-

stat, the thermostat tracks the temperatures at regular intervals

in each cooling or heating mode. As long as the space tempera-

ture is improving, the Apollo control will not allow the second

stage to be energized. If the space temperature stays the same

or the demand becomes greater, the second stage will energize.

Provide Power To Apollo Control — After the wir-

ing has been completed, provide power to the Apollo control.

Once power has been provided, the Apollo control will power

the thermostat. The heating (if applicable) and/or cooling set

points will appear on the thermostat display screen. The ther-

mostat is now ready to be programmed. If the display is blank

or blinking, recheck the wiring connections between the ther-

mostat and Apollo control.

Heating Lockout — When the heating lockout tempera-

ture set point has been configured, and the heating lockout op-

tion has been configured to ON, the Apollo control will not al-

low heating to energize when the outdoor-air temperature rises

above the heating lockout set point.

OPERATION

Cooling Lockout — When the cooling lockout tempera-

ture set point has been configured, and the cooling lockout op-

tion has been configured to ON, the Apollo control will not al-

low cooling to energize when the outdoor-air temperature

drops below the cooling lockout set point.

There are 3 system switches which are used to control oper-

ation at the thermostat: Heat, Cool, and Fan. The Heat and

Cool switches can be set to either AUTO. or OFF position. The

Fan switch can be set to either AUTO or ON position. When

the fan is running, the FAN indicator will be shown on the ther-

mostat display screen. When Cooling mode is energized, the

COOL indicator will be shown on the thermostat display

screen. When Heating mode is energized, the HEAT indicator

will be shown on the thermostat display screen. When the

second stage of heating or cooling is energized, a decimal point

is displayed between the heating and cooling set points.

Time-Delay Relay — The thermostat and the Apollo

control utilize a 5-minute time delay between the different

modes of operation for the rooftop unit. When a mode of oper-

ation is deenergized, another mode cannot begin for 5 minutes.

NOTE: Refer to Product Support Bulletin No. 93-005 for shielded wire applica-

tions when wiring the thermostat to the Apollo control and for all communication

bus wiring connections or contact your local representative.

Fig. 6 — Thermostat and Apollo Control Wiring

TROUBLESHOOTING

2. The thermostat is displaying the decimal point.

a. Check to see if the H2 LED is lit on the Apollo

control. If it is not lit, replace the Apollo control.

See Fig. 7-10 for Apollo factory, control, and system wiring.

Blank Display or Blinking Display at the

Thermostat

b. The LED is lit, but second stage is not energized.

Check the voltage across the H2 relay contact. If it

reads 24 vac, replace the relay board. If it reads 0 to

. Check to ensure there is at least 20.5 vac across the 2 termi-

nals labelled 24 vac. If there is not at least 20.5 vac, check

the unit transformer which is powering the Apollo control.

vac, check the H2 contactor and the unit transformer.

The Control Will Not Energize Cooling

. If an ac voltage between 20.5 and 30 vac is read, check for

. The thermostat is not displaying the cool indicator.

0 vdc between the terminals labelled WHT and RED. If

a. Check the cooling lockout temperature set point

and options to make sure the outdoor-air tempera-

ture is not locking out Cooling mode.

there is 0 vdc between the terminals, replace the Apollo

control. If a value between 1 and 10 vdc is read, check the

wiring between the thermostat and the Apollo control.

b. Ensure that a sensor in the system is not reading

below the cooling low limit temperature. If a sup-

ply air sensor or a direct expansion (DX) coil sen-

sor is not connected to the relay pack, turn off High

and Low Limits at the thermostat.

c. Check the Cool switch and make sure it is in the

AUTO. position.

. If the thermostat display is blinking on and off, this is an

indication that there is a communication problem be-

tween the thermostat and the Apollo control. The thermo-

stat and the Apollo control communicate on the blue and

yellow wires. If either one is shorted, open, or crossed, it

will cause the thermostat display to blink.

To check the wiring between the thermostat and the Apollo

control:

2. The thermostat is displaying the cool indicator.

. Remove the thermostat and connector board.

a. Check to see if the C1 LED is lit on the Apollo con-

trol. If it is not, replace the Apollo control. If the C1

LED is lit on the Apollo control, check the voltage

across the C1 relay contact. If it reads 24 vac, replace

the Apollo control. If it reads 0 to 2 vac, check the C1

contactor and the unit transformer.

2. Wire the connector board to the Apollo control with a

short piece of field-supplied 5-conductor cable.

3. Plug the thermostat into the connector board.

a. If thermostat powers up, there is a wiring problem.

Find the open or shorted wire, or replace the wiring

between the thermostat and the Apollo control.

b. If the thermostat does not power up, try another

thermostat. If the new thermostat powers up,

replace the off thermostat. If the new thermostat

will not power up, replace the Apollo control.

The Control Will Not Energize Second Stage

Cooling

1. The thermostat is not displaying the second stage indica-

tor. A decimal point on the thermostat display screen is the

indication that the thermostat is asking for second stage.

a. Check to see if the space demand is equal to or

greater than 2° F. The control must see a 2° F

demand before it will call for second stage.

b. Check the Temperature Trend Staging option. If

this option is configured to “on” and space condi-

tions are improving, the control will not energize

the second stage.

. The thermostat is displaying the decimal point.

a. Check to see if the C2 LED is lit on the Apollo

control. If it is not lit, replace the Apollo control.

The Control Will Not Energize Heating

1. The thermostat is not displaying the heat indicator:

a. Check the heating lockout temperature set point

and options to make sure the outdoor-air tempera-

ture is locking out Heating mode.

b. Ensure that a sensor in the system is not reading

above the heating high limit temperature. If a sup-

ply air sensor or a direct expansion (DX) coil sen-

sor is not connected to the Apollo control, turn off

the High and Low Limits option at the thermostat.

b. The LED is lit, but second stage is not energized.

Check the voltage across the C2 relay contact. If it

reads 24 vac, replace the relay board. If it reads 0

to 2 vac, check the C2 contactor and the unit

transformer.

c. Check the Heat switch and make sure it is in the

AUTO. position.

. The thermostat is displaying the heat indicator.

a. Check to see if the H1 LED (light-emitting diode)

is lit on the Apollo control. If it is not, replace the

Apollo control. If the H1 LED is lit on the Apollo

control, check the voltage across the H1 relay con-

tact. If it reads 24 vac, replace the Apollo control.

If it reads 0 to 2 vac, check the H1 contactor and

the unit transformer.

The Control Will Not Energize The Fan

1. The fan indicator is not lit on the thermostat.

a. The Fan switch is in the AUTO. position and the

control is not in a mode (HEAT or COOL

position).

The Control Will Not Energize Second Stage

Heating

b. The fan switch is in the ON position but the ther-

mostat is in setback and has no mode.

c. The thermostat has just received power or has just

reset and is going through its initialization process.

. The thermostat is not displaying the second stage indica-

tor. A decimal point on the thermostat display screen is the

indication that the thermostat is asking for second stage.

2. The fan indicator is lit on the thermostat.

a. Check to see if the space demand is equal to or

greater than 2° F. The control must see a 2° F

demand before it will call for second stage.

b. Check the Temperature Trend Staging option. If

this option is configured to “on” and space condi-

tions are improving, the control will not energize

the second stage.

a. Check the fan LED on the Apollo control. If it is

not lit, replace the Apollo control.

b. If the fan LED is lit, check the voltage across the

fan relay contact. If it reads 24-vac, replace the

relay board. If it reads 0 to 2 vac, check the fan

contactor and the unit transformer.

LEGEND

COM

— Communication

ECONO — Economizer

— Normally Closed

Fig. 7 — Factory-Supplied Wiring to Rooftop Unit and Apollo Control

Filter status switch and humidity sensor cannot function

simultaneously. Only one sensor can be wired.

LEGEND

—

Contactor

IAQ

—

Indoor Air Quality

Normally Closed

Normally Open

CHAS

COM

Ground

Common

Direct Expansion

OAT

SAT

Outdoor-Air Thermostat

Saturated-Air Temperature

Factory Wiring

ECON — Economizer

GND

—

Ground

Heat

Field Wiring

Fig. 8 — Apollo Control Wiring Schematic — 48/50HJ, 3 to 20 Ton Units;

8/50TF,TM, 3 to 12-1/2 Ton Units; 48/50TJ,TM, 15 to 25 Ton Units; 50HJQ/TFQ, 3 to 10 Ton Units

Filter status switch and humidity sensor cannot function

simultaneously. Only one sensor can be wired.

LEGEND

—

Contactor

IAQ

—

Indoor Air Quality

Normally Closed

Normally Open

CHAS

COM

Ground

Common

Direct Expansion

OAT

SAT

Outdoor-Air Thermostat

Saturated-Air Temperature

Factory Wiring

ECON — Economizer

GND

—

Ground

Heat

Field Wiring

Fig. 9 — Apollo Control Wiring Schematic — 50HJQ, 12 / and 15 Ton Units

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1

PC 111 Catalog No. 534-80082 Printed in U.S.A. Form 48/50H,T-15SI Pg 8 8-01 Replaces: 48/50H,T-2SI

Tab 1a 1b 5a 5a 6a 6b

Lux Products PSP721U Thermostat User Manual

Honeywell T87F DESIGNER Thermostat User Manual

White Rodgers 1F96 Thermostat User Manual

Honeywell RTH9580 Thermostat User Manual

Honeywell TH6320U Thermostat User Manual

Lux Products PH521 Thermostat User Manual

Emerson 1F80ST 0471 Thermostat User Manual

Honeywell TB6980 Thermostat User Manual

White Rodgers 1F81 71 Thermostat User Manual

White Rodgers IF58 72 Thermostat User Manual