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Thermistors
Thermistors
Thermistors provide temperature feedback to the
main board to maintain proper room temperature
and operating conditions of the sealed system.
On heat pump models (AZ65), thermistors also
provide outdoor air temperature and outdoor
coil temperature in order for the main board to
operate the Zoneline by the most efcient means.
Thermistors: All Zoneline models have two
indoor thermistors which are attached to the
indoor coil.
The indoor air thermistor is mounted on the front
of the coil to sample the incoming room air.
The indoor coil thermistor is mounted on the right
side of the coil in a copper well to sample the coil
temperature.
Indoor Thermistor Resistance (ohms)
All Zoneline heat-pump models have two indoor
thermistors and two outdoor thermistors.
°F Air Coil
10 28030 28030
30 15340 15340
32 14570 14570
50 8850 8850
70 5300 5300
90 3280 3280
Thermistors Indoor
Thermistors Outdoor
Outdoor Thermistors Resistance (ohms)
°F AIR COIL
10 63260 94900
30 34620 51940
32 32860 49330
50 19970 29960
70 11950 17930
90 7320 10970
One outdoor thermistor is attached to the outdoor
coil and the other outdoor thermistor is set into
the base assembly, enabling it to monitor outdoor
air temperature.
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