3
C
TDR
LPS
LPS
C
TDR
T
LOW-PRESSURE SWITCH
CONTACTOR COIL
TIME DELAY RELAY
RELAY COIL
FACTORY WIRING
FIELD WIRING
T
A93165
Fig. 5
—
Low Voltage Wiring for Winter Start Control
START--UP
To start units equipped with the low--ambient pressure switch,
perform the following steps:
1. Turn power on to unit.
2. Set thermostat below room temperature.
3. Wait for the unit to start. There may be a 5--minute delay
in the thermostat or in the outdoor unit.
4. Observe unit operation as described below.
a. The fan will be off when compressor starts.
b. At outdoor temperatures around 0
_
F, fan may not run
at all.
c. At summer temperatures, fan will start after 10 to 30
sec of compressor operation and may not turn off until
thermostat is satisfied.
d. At outdoor ambients between 80
_
F and 20
_
F, fan will
turn on and off to maintain pressure as shown in Table
1.
KS
A
LA
