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System Cooling
1. Set the thermostat’s system mode to COOL and the
fan mode to AUTO. Gradually lower the thermostat
temperature setpoint below room temperature and
verify the outdoor unit and indoor blower energize.
2. Verify blower wheel is spinning in direction indicated by
arrow. Feel the air being circulated by the indoor blower
and verify that it is cooler than ambient temperature.
Listen for any unusual noises. If unusual sounds
occur, determine the source of the noise and correct
as necessary.
3. Verify HI and LO refrigerant pressures.
4. Allow the system to operate for several minutes
and then set the temperature selector above room
temperature. Verify the fan and compressor cycle off
with the thermostat. NOTE: The blower should also
stop unless fan mode is set to the ON position.
System Heating (optional)
1. Set the thermostat's system mode to HEAT and the
temperature mode above room temperature.
2. Verify the optional heating equipment (furnace or
electric heat) and indoor blower energize. Feel the air
being circulated by the indoor blower and verify that
it is warmer than ambient temperature. Listen for any
unusual noises. If unusual sounds occur, determine
the source of the noise and correct as necessary.
Refrigerant Charging
WARNING:
This split system air conditioner left the factory
with a nitrogen holding charge. DO NOT
operate any unit while it contains a Nitrogen
holding charge. Doing so may damage the
units compressor. Follow these charging
instructions for maximum unit performance and
efficiency. Some local codes require licensed
installation/service personnel to service this
type of equipment. Refrigerant charging must
be done by qualified personnel familiar with safe
and environmentally responsible refrigerant
handling procedures. Under no circumstances
should the owner attempt to install and/or
service this equipment. Failure to comply with
this warning could result in property damage,
personal injury, or death.
This unit may contain a compressor with POE oil. If the
compressor model contains an E before the first hyphen,
then it is a POE oil compressor. If it does not then it is a
mineral oil compressor. (Example: ZR42K5E-PFV-130
isaPOEoilcompressor,whileZR42K5-PFV-130isa
mineral oil compressor).
To properly charge these units:
1. Read all Installation Instructions first.
2. Complete any brazing operations. (e.g. Split system
line-sets)
3. Leak check and evacuate the whole system using
proper methods.
4. Purge the nitrogen holding charge.
5. Evacuate the unit to 350-500 microns.
6. Allow the unit to remain under vacuum for at least 30
min.
7. Weigh-In the proper amount of new (or reclaimed)
R-22 refrigerant. Refer to Table 3 or the units rating
label to determine the correct amount of charge.
• Refrigerant charging charts are applicable only to
matched assemblies of this equipment and listed
airflows for the indoor coil. Refer to Figures 4 - 10
(Pages 9 - 12) for correct system charging.
• Outdoor units with indoor coils not listed are not
recommended. Deviations from rated airflows or non-
listed combinations may require modification to the
expansion device and refrigerant charging procedures
for proper and efficient system operation.
• Therefrigerantchargecanbecheckedandadjusted
through the service ports provided external to the
outdoor unit. Use only gage line sets which have a
“Schrader” depression device present to actuate the
valve.
Charging an R-22 system in AC mode at outdoor tem-
peratures above 55° F for optimized sub-cooling of 10°
F - 12° F.
1. With the system operating at steady-state, measure
the liquid refrigerant pressure (in psig) at the outdoor
unit service valve.
2. Measure the liquid refrigerant temperature (in
Fahrenheit) at the service valve.
3. Determine the required liquid refrigerant pressure.
Refer to Tables 4 - 10 (pages 13 - 16) for correct
system charging.
• Ifthe pressure measured in Step 1 is greater than
the required liquid refrigerant pressure determined in
Step 3, then there is too much charge in the system.
Remove refrigerant and repeat Steps 1 through 3 until
the system is correctly charged.
• IfthepressuremeasuredinStep1islessthanthe
required liquid refrigerant pressure determined in
Step 3, there is too little charge in the system. Add
refrigerant and repeat Steps 1 through 3 until the
system is correctly charged.
Table 3. Refrigerant Metering Device
for 13 SEER Split System Air Conditioner
Model
Number
Restrictor Bore
Size (inches)
System charge
R-22 (oz.)
018KA
0.053 78
024KB 0.060 53
030KB 0.065 56
036KB 0.075 68
042KA 0.078 122
048KA 0.089 126
060KA
0.099 160