Harbor Point HF-25GW/GX1b Installation, Operation And Maintenance Manual page 16

HARBOR POINT WALL SPLIT DUCTLESS SYSTEMS
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.
Example of typical system operations:
Conditions
Return Gas Psig
Superheat
Conditions
High Side Gas Psig
Sub-Cooling
FIELD CHARGING
Cooling Cycle
80°F DB/50% RH Indoors
82°F DB Outdoors
140 (49° F Saturated Temperature)
Refer to supplied superheat chart (16° F)
Heat Cycle
70° F Indoors
47° F Outdoors
350/375 (107/112° F Saturated Temperature)
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.
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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.