Manual

I Split System Condensers Installation Instructions
Ifthe actual superheat readings are higher than shown, the
system is most likely under-charged, and charge should
be added. Add charge in 4 ounce increments, and recalcu-
late superheat values. Continue adjusting charge until the
actual superheat approximately matches the recom-
mended values.
Ifthe actual superheat readings are lower than shown, the
system is most likely over-charged, and charge should be
removed. Remove charge in 4 to 6 ounce increments, and
recalculate superheat values. Continue adjusting charge
until the actual superheat approximately matches the rec-
ommended values.
NOTE: Each time that charge is added or removed from
the system, allow the system to run approximately 15 min-
utes before pressure and temperature readings are taken
and superheat calculations made.
NOTE: Indoor Wet Bulb Temperature ( and Relative Hu-
midity) will alter superheat values. All readings should be
at 50% humidity inside and 350 to 450 CFM per ton across
the indoor coil.
Heating Checkout (Heat Pump Only)
1. Turn thermostat heat-cool switch to OFF. Turn ther-
mostat fan switch to AUTO.
2. Turn on all power except 230 volt line to outdoor sec-
tion.
3. Turn fan switch on thermostat to ON. Blower should
run. Reset to AUTO; blower should turn off.
4. Set thermostat below room temperature. Turn selec-
tor switch to heat. Move thermostat above room tem-
perature. Blower should run on heating speed and a
click should be heard in the condensing unit outside
(contactor closing). The sequencer coils for auxiliary
heat should be energized. After approximately 30
seconds the contacts in the sequencers should close
and the electric heat elements start heating. Allow 3
minutes for all heaters to come on.
5. Set system switch to OFF> Turn the thermostat
above room temperature. Turn on the 230 volt power
to the outdoor unit. Nothing apparent will be happen-
ing, but the crankcase heater is now energized. If the
outdoor temperature is below 75 °F allow the unit to
stay in this mode at least 6 hours. This is needed to
vaporize any refrigerant that may be in the compres-
sor oil.
6. Set the thermostat above room temperature. Move
system switch to heat. Count to 5 (about 5 seconds).
Turn the electric power off at the condensing unit dis-
connect switch. Check that there is no clattering or
unusual noises. The outdoor fan blade should have
started turning and a humming noise should have
been heard from the compressor. The indoor fan
should continue to run at its normal speed and elec-
tric elements continue to heat.
7. Wait 2 minutes, then repeat the procedure and re-
check the same things in case you missed something
during the first power application.
.
With the unit operating, close all doors, windows,
storm windows, and openings to the house. Set the
thermostat to the desired setting. Set outdoor ther-
mostat (if installed) to balance point of house. If tem-
perature of house is at least two degrees below
thermostat setting, heat pump and auxiliary heat not
controlled by outdoor thermostats will continue to run
until room temperature is approximately 2° below
thermostat set point. Auxiliary heat light should go
out and auxiliary heat cycle off. Heat pump should
continue to run until thermostat reaches set point.
To Check System Refrigerant Charge
(Heating Mode)
For models with an outdoor restrictor orifice, optimum heat-
ing performance will be achieved when the operating
charge produces 10° - 20° F suction superheat at com-
pressor with 47° F outdoor ambient and 70° F dry bulb in-
door temperature (ARI "High Heat" test conditions) at rated
airflow.
The recommended method of addition or removal of
charge in the heating mode is by weight. The system op-
eration may be checked against the performance charts.
Remember, indoor airflow must be approximately 400
CFM per ton to compare operation to performance charts.
Defrost System (Heat Pump Only)
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 de-
frost. When the sensor sees a rise in the outdoor coil tem-
perature to approximately 10 minutes, the defrost will be
terminated.
In some areas, with high humidity, the time interval may re-
quire adjustment for complete removal of ice from the coil.
For best economy, always set to the longest interval 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.
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