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Honeywell Q7300A Installation Instructions Manual

Series 2000 commercial thermostat subbases
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APPLICATION
The Q7300 Thermostat Subbases are used with T7300
Thermostats to provide electronic control of commercial
Model
Applications
Q7300A
Conventional
Q7300C
Q7300D
Q7300G
Conventional
a
Depends on model.
RECYCLING NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do n
control in the trash
Contact your local waste management authority for
instructions regarding recycling and the proper
disposal of the old thermostat.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
the instructions can damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out the product operation.
® U.S. Registered Trademark
Copyright © 1996 Honeywell Inc. •
Commercial Thermostat Subbases
Table 1. Description of Q7300 Subbases.
Thermostat Required
Heat Pump
Heat Pump
ot
place your old
• All Rights Reserved
Q7300A,C,D,G Series 2000
24 Vac single or multistage heat pump or conventional
heating and cooling systems. Select models have termi-
nals for LEDs and remote temperature sensors. Refer to
Table 1. All Q7300 Thermostat Subbases require a
common wire to the supply power.
Maximum Stages
Heat
T7300D, F
T7300E, F
T7300E, F
T7300D, F
Location
Subbase without Remote-Mounted
Temperature Sensor
Install the thermostat about 5 ft (1.5m) above the floor in
an area with good air circulation at average temperature.
See Fig. 1.
Do not install the thermostat where it can be affected by:
— drafts, or dead spots behind doors and in corners.
— hot or cold air from ducts.
— radiant heat from sun or appliances.
— concealed pipes and chimneys.
— unheated (uncooled) areas such as an outside wall
behind the thermostat.
Subbase with Remote-Mounted
Temperature Sensor(s)
If only the remote-mounted temperature sensor(s) is used
to sense and control room temperature, then install the
thermostat in an area that is accessible for setting and
adjusting the temperature and settings.
If both the subbase and remote-mounted temperature
sensor(s) are used to sense and control room tempera-
ture, then install the subbase about 5 ft above the floor in
an area with good air circulation.
X-XX UL
INSTALLATION INSTRUCTIONS
a
Cool
2
2
3
2
3
2
3
3
Hookup Drawing
9-12
13-15
16
17
62-0135

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  Summary of Contents for Honeywell Q7300A

  • Page 1 5 ft above the floor in an area with good air circulation. ® U.S. Registered Trademark 62-0135 Copyright © 1996 Honeywell Inc. • • All Rights Reserved X-XX UL...
  • Page 2 Q7300A,C,D,G SERIES 2000 COMMERCIAL THERMOSTAT SUBBASES 5 FEET (1.5 METERS) M4823A Fig. 1. Typical location of thermostat or remote-mounted sensor. Install the remote-mounted sensor(s) about 5 ft (1.5m) SUBBASE above the floor in an area with good air circulation at average temperature.
  • Page 3: Mounting Subbase

    Q7300A,C,D,G SERIES 2000 COMMERCIAL THERMOSTAT SUBBASES SUBBASE WALL T7047G T7047G WIRES THROUGH WALL T7047G WALL ANCHORS T7047G T7047G M4841 MOUNTING HOLES Fig. 5. Five T7047G Sensors providing temperature averaging network for MOUNTING T7300/Q7300 Thermostat/Subbase. SCREWS M10237 SUBBASE LEDS Fig. 7. Mounting the subbase.
  • Page 4 JUMPER RC TERMINAL TO RH TERMINAL WHEN INSTALLED ON A SYSTEM WITH ONE TRANSFORMER. CONNECT GND TO EARTH GROUND. INSTALL FIELD JUMPER BETWEEN X4 AND X TO POWER LEDS. M4939A Fig. 9. Typical hookup of T7300D,F/Q7300A in one-stage heat and one-stage cool conventional system with two transformers. SUBBASE COMPRESSOR...
  • Page 5 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED. JUMPER RC TERMINAL TO RH TERMINAL WHEN INSTALLED ON A SYSTEM WITH ONE TRANSFORMER. M10236 Fig. 11. Typical hookup of T7300D,F/Q7300A in two-stage heat and two-stage cool conventional system with two transformers. SUBBASE...
  • Page 6 Q7300A,C,D,G SERIES 2000 COMMERCIAL THERMOSTAT SUBBASES SUBBASE EQUIPMENT RELAY DISCHARGE MONITOR 2 T7147 REMOTE COMFORT ADJUST MODULE SENSOR HEAT COMPRESSOR EQUIPMENT EM. HT. RELAY 2 CONTACTOR 1 RELAY MONITOR 1 ECONOMIZER COOL HEAT CHANGEOVER CHANGEOVER VALVE VALVE (HOT) TRANSFORMER POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
  • Page 7 Q7300A,C,D,G SERIES 2000 COMMERCIAL THERMOSTAT SUBBASES SUBBASE HEAT COMPRESSOR EQUIPMENT RELAY 2 MODE CONTACTOR 2 MONITOR 2 EM. HT. COMPRESSOR HEAT RELAY RELAY 3 CONTACTOR 1 EQUIPMENT MONITOR 1 COOL HEAT CHANGEOVER RELAY CHANGEOVER VALVE VALVE (HOT) TRANSFORMER POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
  • Page 8 Q7300A,C,D,G SERIES 2000 COMMERCIAL THERMOSTAT SUBBASES SUBBASE A2 A3 HEAT COMPRESSOR ECONOMIZER COMPRESSOR EQUIPMENT RELAY 2 CONTACTOR 1 DISCHARGE CONTACTOR 2 MONITOR 2 SENSOR T7147 REMOTE COMFORT ADJUST MODULE EQUIPMENT COMPRESSOR RELAY CONTACTOR 3 MONITOR 1 HEAT RELAY 3 HEAT...

This manual is also suitable for:

Q7300cQ7300dQ7300g