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I Split System Condensers
Table A-1 shows the subcooling range at 47 degrees F
outdoor ambient and 70 degrees F dry bulb indoor ambient
temperature conditions.
Table A-1
Heat Pump Model
(Description)
14 SEER - 2 Ton
14 SEER - 2.5 Ton
14 SEER - 3 Ton
14 SEER - 3.5 Ton
14 SEER - 4 Ton
14 SEER - 5 Ton
12 SEER - 4 Ton
12 SEER - 5 Ton
Subcooling Range at
the Outdoor Unit
40 to 45 Deg. F Subcooling
40 to 45 Deg. F Subcooling
40 to 45 Deg. F Subcooling
30 to 35 Deg. F Subcooling
40 to 45 Deg. F Subcooling
30 to 35 Deg. F Subcooling
40 to 45 Deg. F Subcooling
40 to 45 Deg. F Subcooling
Defrost System (Heat Pump Only)
Time / Temperature Type:
The defrost system is electronic with an adjustable time in-
terval of 90, 60, or 30 minutes. It is factory set at 60 or 90
minutes. At the selected time interval with the outdoor coil
temperature at approximately 28°F, the system will defrost.
When the sensor sees the correct rise in the outdoor coil
temperature or after approximately 10 minutes, the defrost
will be terminated.
Demand Type:
The defrost frequency is demand based on the coil reach-
ing atemperature of 35 °F for a minimum of 34 minutes and
a maximum of 6 hours of run time. The actual time interval
will vary depending on the outdoor temperature which the
control is also sensing. This can not be adjusted, but the
defrost termination temperature can be. Factory setting is
50°F for termination or after approximately 14 minutes, the
defrost will be terminated. Temperature can be set higher if
all the ice is not melting off the coil.
In some areas, with high humidity, the time interval or tem-
perature termination may require adjustment for complete
removal of ice from the coil. For best economy, always set
to the longest interval or lowest temperature that will keep
the coil clear of ice.
NOTE: The term ice means hard but not frost. During nor-
mal operation, the coils may become coated with frost until
they are solid white. The time interval for the defrost should
be set so the frost and ice melt off completely without hard
ice building up on the coil.
Defrost Control
Time Interval Adjustment
(Except Demand Defrost)
To adjust defrost frequency, turn off all power to the Heat
Pump. Remove control box cover and locate the electronic
defrost control board.
The defrost control board has a jumper clip that fits over
two pins. To change the time interval, remove the jumper
clip and place it on pins for the desired time interval, 30, 60
or 90 minutes.
Figure 18 [
Installation Instructions
Adjusting Defrost Time -
Time Temperature Type
Jum
Temperature Adjustment
(Demand Defrost)
Turn off all power to the Heat Pump. Remove control box
cover and locate the electronic defrost control board.
The defrost control board has a jumper clip that fits over
two pins. To change the temperature termination, remove
the jumper clip and place iton pins for the desired interval of
50, 60, 70 or 80 degrees.
Functional Check (Demand Defrost)
Toforce a defrost cycle place the jumper on the TEST pins.
This will cause an accelerated test defrost cycle. Revers-
ing valve will energize, condenser fan stop and electric
heat should come on. This will verify the switching func-
tions of the board.
Figure!9 [ Adjusting Defrost-Demand Type
Jumper
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