Gree KWCA09A0 - Field Charging

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EnviroAir High Wall Ductless Split Systems
16
Instructions:
1. Measure suction pressure and deter-
mine evaporator-refrigerant temperature
on R410A scale of low-side gauge.
2. Measure suction-line temperature on
suction line of the unit.
3. Measure outdoor and indoor tempera
-
tures.
4. Determine from the table what the
superheat should be for the indoor and
outdoor temperatures.
5. Adjust charge if needed. Be sure unit is
running at stabilized condition.
ENVIROAIR HIGH WALL DUCTLESS SPLIT SYSTEMS
FIELD CHARGING
Example of typical system operations:
Cooling Cycle
Conditions
80°F DB/50% RH Indoors
82°F DB Outdoors
Return Gas Psig 140 (49° F Saturated Temperature)
Superheat Refer to supplied superheat chart (16° F)
Heat Cycle
Conditions
70° F Indoors
47° F Outdoors
High Side Gas Psig 350/375 (107/112° F Saturated Temperature)
Sub-Cooling 10 - 15° F
Note: When the system is in heat cycle, the refriger-
ant charge is checked by using the liquid sub-
cool method. Liquid sub-cool is the temperature
below the high side pressure at its saturation
temperature.