Product data

Discharge Temperature Switch (DTS) Heat Pump Only
Switch used only on sizes 030 and 036 with scroll compressors, senses high discharge temperature levels reached under
extreme operating conditions ( low charge or low evaporator airflow) Approximate cut in and cut out temperatures 290f and
140f respectively.
Thermistors
The outdoor coil temperature thermistor and outdoor air temperature thermistor are used only with duct free systems that use
a microprocessor control. Refer to separate installation instructions for High Wall Systems.
Time Delay Relay (TDR1) Heat Pump Only
Relay used only on sizes 030 and 036 with scroll compressors, ensures that compressor comes to a complete stop before
restarting.
Time Delay Relay (TDR2) Heat Pump Only
Relay prevents nuisance tripping of the low-pressure switch during system switchover after defrost.
Compressor Lock out Switch – Heat Pump Only
Units with compressor lockout protective device shut down on any safety trip. Determine reason for safety trip. To restart,
turn the thermostat to OFF position and then to COOL position. MORE ON NEXT PAGE