7
Final Charge Adjustment
The outdoor temperature must be 60°F or higher. Set the room
thermostat to COOL, fan switch to AUTO, and set the temperature
control well below room temperature.
After system has stabilized per startup instructions, check
subcooling and superheat as detailed in the following section.
Fixed Orifice
To prevent personal injury, carefully connect and disconnect
manifold gauge hoses. Escaping liquid refrigerant can cause burns.
Do not vent refrigerant into the atmosphere. Recover all
refrigerant during system repair and before final unit disposal.
CAUTION
1. Purge gauge lines. Connect service gauge manifold to base-
valve service ports. Run system at least 10 minutes to allow
pressure to stabilize.
SUPERHEAT FORMULA = SUCT. LINE TEMP. - SAT. SUCT. TEMP.
2. Temporarily install a thermometer 4-6" from the compres-
sor on the suction line. Ensure the thermometer makes ad-
equate contact and is insulated for best possible readings.
Use vapor temperature to determine superheat.
3. Refer to the superheat table provided for proper system su-
perheat. Add charge to lower superheat or recover charge to
raise superheat.
4. Disconnect manifold set, installation is complete.
Superheat Formula = Suct. Line Temp. - Sat. Suct. Temp.
55 57 59 61 63 65 67 69 71
10 13 17 20 23 26 29 30 31
8 1114161922262729
5 8 10 13 15 19 23 24 25
------ 6 9 1115202123
--- --- --- --- 7 12 17 18 20
--- --- --- --- --- 8 13 15 16
--- --- --- --- --- 7 10 11 13
--- --- --- --- --- --- 7 8 10
--- --- --- --- --- --- --- 7 8
--- --- --- --- --- --- --- --- 7
--- --- --- --- --- --- --- --- ---
--- --- --- --- --- --- --- --- ---
105
110
115
75
80
85
90
95
100
SYSTEM SUPERHEAT (+/- 1.0 °F)
Indoor Wet Bulb Temperature, °F
Outdoor Dry Bulb
Temperature, °F
60
65
70
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