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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.
16
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.
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