Carrier 4850HJ004 024 Thermostat User Manual

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48/50HJ004-024  
0TFQ004-012, 48/50TF,TM004-014  
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5
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  
3
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  
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Tab 1a 1b 5a 5a 6a 6b  
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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  
powered by 24 vac/10 va; supplies thermostat with  
1
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  
5
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  
2
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  
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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.  
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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  
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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  
1
. 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.  
2
vac, check the H2 contactor and the unit transformer.  
The Control Will Not Energize Cooling  
2
. If an ac voltage between 20.5 and 30 vac is read, check for  
1
. The thermostat is not displaying the cool indicator.  
1
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.  
3
. 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.  
1
. 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.  
2
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.  
2
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.  
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.  
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.  
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LEGEND  
COM  
Communication  
ECONO — Economizer  
NC  
 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  
C
Contactor  
IAQ  
NC  
Indoor Air Quality  
Normally Closed  
Normally Open  
CHAS  
COM  
DX  
Ground  
Common  
NO  
Direct Expansion  
OAT  
SAT  
Outdoor-Air Thermostat  
Saturated-Air Temperature  
Factory Wiring  
ECON — Economizer  
GND  
HT  
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  
4
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*
Filter status switch and humidity sensor cannot function  
simultaneously. Only one sensor can be wired.  
LEGEND  
C
Contactor  
IAQ  
NC  
Indoor Air Quality  
Normally Closed  
Normally Open  
CHAS  
COM  
DX  
Ground  
Common  
NO  
Direct Expansion  
OAT  
SAT  
Outdoor-Air Thermostat  
Saturated-Air Temperature  
Factory Wiring  
ECON — Economizer  
GND  
HT  
Ground  
Heat  
Field Wiring  
1
Fig. 9 — Apollo Control Wiring Schematic — 50HJQ, 12 / and 15 Ton Units  
2
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Copyright 2001 Carrier Corporation  
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.  
Book 1  
1
1
4
4
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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  

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