Carrier Comfort 50VT-C24 Installation Instructions Manual page 30

14 seer single - packaged heat pump, system with puron (r-410a) refrigerant
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OUTDOOR FAN
RELAY
DEFROST THERMOSTAT
MUST BE CLOSED BEFORE
DEFROST TIMER BEGINS
T1 - ENABLES DEFROST
Y OUTPUT TO PRESSURE
SWITCHES AND CONTACTOR
TIMER.MUST BE
ENERGIZED FOR
DEFROST TIMER
TO START
C - COMMON
O - REVERSING VALVE
SPEEDUP
THERMOSTAT INPUTS
A150622
Fig. 19 - - Defrost Control
30

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