Q7300H Series 2000 Commercial
The Q7300H Thermostat Subbases are used with
T7300F Thermostats to provide electronic control of
commercial 24 Vac single or multistage heat pump or
conventional heating and cooling systems. All models
have EB terminals for L
Depends on model.
Designed for heat applications using a valve and valve actuator (see Table 2).
The valve does not close unless correct
valve and valve actuator combination is used.
See Table 2.
Table 2. Valve and Valve Actuator Combinations.
Table 3. Output Relay Maximum Current (at 30 Vac).
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Copyright © 2001 Honeywell •
Table 1. Q7300 Subbase Description.
Valve Actuator Model
Maximum Current (in Amps)
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Terminals are also provided for the T7047 Remote
Sensor or the T7147 Remote Sensor and Override
Module. See Table 1. Select models are designed for
heat applications using a valve and valve actuator
combination for hydronic heating with 2-speed fan
control. See Table 4. All Q7300 Thermostat Subbases
require a common wire to the supply power.
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of the old thermostat.
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
3. Installer must be a trained, experienced service
4. After completing the installation, use these
instructions to check out the product operation.