Honeywell G User Manual

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T7047C,G,H REMOTE SPACE SENSORS
OPERATION AND CHECKOUT
Operation
The T7047C,G Remote Sensor control element is a 
negative temperature coefficient (NTC) thermistor. As 
the room temperature increases, the resistance of the 
thermistor decreases.
The T7047H Remote Sensor control element is a 
positive temperature coefficient (PTC) thermistor. As 
the room temperature increases, the resistance of the 
thermistor increases.
The change in the thermistor resistance causes the 
motor, system logic panel, or system transmitter bridge 
circuit to become unbalanced. As the electronic motor, 
system logic panel or system transmitter circuits react to 
rebalance the circuit, damper or valve movement, or 
sequential staging of heating and/or cooling equipment 
occurs.
Low Range Thermostat
Use caution when setting temperatures below 40°F 
(5°C). A low temperature setpoint can result in 
temperatures below freezing in areas distant from the 
remote sensor.
Calibration
The T7047 Remote Space Sensor is accurately 
calibrated at the factory. It cannot be field calibrated.
Checkout
Allow the T7047 Remote Space Sensor to stabilize to 
ambient conditions before taking a resistance 
measurement. Measure nominal resistance according 
to the values described in the Specifications section. 
Measure the sensor resistance in accordance with the 
temperature curves. See Fig. 3 through 7.
Check operation of the complete control systems as 
directed in the associated technical publications.