Carrier Thermostat 48 50HJ004 024 User Manual

48/50HJ004-024  
50TFQ004-012, 48/50TF,TM004-014  
50HJQ004-016, 48/50TJ,TM016-028  
Apollo Control  
Installation, Operation, and  
Troubleshooting Instructions  
The TEMP System thermostat maintains proper tempera-  
SAFETY CONSIDERATIONS  
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.  
TEMP SYSTEM THERMOSTATS — The 33CSTMT-01,  
or 33CSVMT-XX (with timeclock) and 33CSTM-01 or  
33CSVM-XX (without timeclock) TEMP System thermostats  
(see Fig. 3) have the following features:  
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.  
Follow all safety codes. Wear safety glasses and work  
gloves. Use quenching cloth for unbrazing operations. Have  
fire extinguishers available for all brazing operations.  
• 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  
NOTE: For 33CSVM(T)-XX thermostats, the “XX” will be  
either “04,” “16,” or “32.”  
When removing panels from the unit, be careful not to  
damage the roof or other surfaces with the panels.  
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  
1
1
4
4
4
Tab 1a 1b 5a 5a 6a 6b  
 
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.  
Wiring Connections  
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.  
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.  
OPERATION  
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  
3
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  
4
 
TROUBLESHOOTING  
See Fig. 7-10 for Apollo factory, control, and system wiring.  
Blank Display or Blinking Display at the  
Thermostat  
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. If an ac voltage between 20.5 and 30 vac is read, check for  
10 vdc between the terminals labelled WHT and RED. If  
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.  
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:  
1. Remove the thermostat and connector board.  
5
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  
Contactor  
IAQ  
NC  
Indoor Air Quality  
Normally Closed  
Normally Open  
C
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;  
48/50TF,TM, 3 to 12-1/2 Ton Units; 48/50TJ,TM, 15 to 25 Ton Units; 50HJQ/TFQ, 3 to 10 Ton Units  
6
 
*Filter status switch and humidity sensor cannot function  
simultaneously. Only one sensor can be wired.  
LEGEND  
Contactor  
IAQ  
NC  
Indoor Air Quality  
Normally Closed  
Normally Open  
C
CHAS — Ground  
COM  
DX  
Common  
NO  
Direct Expansion  
OAT  
SAT  
Outdoor-Air Thermostat  
Saturated-Air Temperature  
Factory Wiring  
ECON — Economizer  
GND  
HT  
Ground  
Heat  
Field Wiring  
Fig. 9 — Apollo Control Wiring Schematic — 50HJQ, 121/2 and 15 Ton Units  
7
 
Copyright 2001 Carrier Corporation  
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 8 8-01 Replaces: 48/50H,T-2SI  
Book 1  
1
1
4
4
4
Tab 1a 1b 5a 5a 6a 6b  
 

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