Honeywell T7047C Manuel D’Utilisation
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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
negative temperature coefficient (NTC) thermistor. As
the room temperature increases, the resistance of the
thermistor decreases.
thermistor decreases.
The T7047H Remote Sensor control element is a
positive temperature coefficient (PTC) thermistor. As
the room temperature increases, the resistance of the
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
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
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
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
(5°C). A low temperature setpoint can result in
temperatures below freezing in areas distant from the
remote sensor.
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
ambient conditions before taking a resistance
measurement. Measure nominal resistance according
to the values described in the Specifications section.
to the values described in the Specifications section.
Check operation of the complete control systems as
directed in the associated technical publications.