Specs

23
TYPICAL WIRING SCHEMATIC (CONT)
Wires to be removed
A14444
Accessory Electric Heater Wiring
CONTROLS
Sequence of operation
When power is supplied to unit, the transformer (TRAN) is
energized.
Cooling Operation — With a call for cooling (O,Y,G), the
reversing valve, contactor, and indoor fan are energized. When the
cooling demand is met, Y and G are de--energized, shutting off the
contactor (compressor, outdoor fan). The indoor fan stops after a
60 second delay.
Heating Operation — With a call for heating (Y,G), the contactor
and indoor fan are energized. When the heating demand is met, Y
and G are de--energized, shutting off the contactor (compressor,
outdoor fan). The indoor fan stops after a 60 second delay.
Continuous Fan — With the continuous indoor fan option
selected on the thermostat, G is continuously energized keeping the
indoor fan running at all times.
Defrost — The defrost control is a time/temperature control which
includes a field--selectable time period between defrost cycles of
30, 60, and 90 minutes. Electronic timer and defrost cycle start
only when contactor is energized and defrost thermostat (DFT) is
closed.
Defrost mode is identical to cooling mode, except outdoor fan
motor stops and a bank of optional electric heat turns on to warm
air supplying the conditioned space.
APPLICATION DATA
Condensate trap — A 2--in. (51 mm) condensate trap must be field
supplied.
1” (25 mm) MIN
.
2” (51 mm) MIN.
TRAP
OUTLET
Maximum cooling airflow — To minimize the possibility of
condensate blow--off from the evaporator, airflow through the units
should not exceed 450 CFM/ton.
Minimum cooling airflow — The minimum cooling airflow is
350 cfm/ton.
Minimum cooling operating outdoor air temperature —All
standard units have a minimum ambient operating temperature of
40F(4.4C). With accessory low ambient temperature kit, units
can operate at temperatures down to 0F (--17.8C).
Maximum operating outdoor air temperature —Maximum
outdoor operating air temperature for cooling is 125F (51.7C).
PH4Z