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PGD4 Series K WPG4 Series K: Installation Instructions
Table 7 – Color Coding for Indoor Fan Motor Leads
Black = High Speed
Orange = Med-High Speed
Red = Med Speed
Pink = Med-Low Speed
Blue = Low Speed
Cooling Sequence of Operation
With the room thermostat SYSTEM switch in the COOL position and
the FAN switch in the AUTO position, the cooling sequence of operation
is as follows:
1. When the room temperature rises to a point that is slightly above
the cooling control setting of the thermostat, the thermostat
completes the circuit between thermostat terminal R to terminals Y
and G.
2. The normally open contacts of energized contactor (C) close and
complete the circuit through compressor motor (COMP) to
condenser (outdoor) fan motor (OFM). Both motors start instantly.
3. The set of normally open contacts on the interface fan board (IFB)
are closed which energizes a circuit to the indoor fan motor (IFM).
NOTE: Once the compressor has started and then stopped, it should not
be started again until 5 minutes have elapsed. The cooling cycle remains
on until the room temperature drops to a point that is slightly below the
cooling control setting of the room thermostat. At this point, the
thermostat breaks the circuit between thermostat terminal R to terminals
Y and G. These open circuits deenergize contactor coil C. The condenser
and compressor motors stop. After a 60-sec. delay, the blower motor
stops. The unit is in a standby condition, waiting for the next call for
cooling from the room thermostat.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Shunt in no
dehumidification
position
Fig. 22 – IGC Board
28
DH
DH
DH
DH
Shunt in
dehumidification
position
A14399
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