Installation Guide

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
CAUTION
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.
SUPERHEAT FORMULA = SUCT. LINE TEMP. - SAT. SUCT. TEMP.
1. Purge gauge lines. Connect service gauge manifold to
base-valve service ports. Run system at least 10 minutes
to allow pressure to stabilize.
2. Temporarily install a thermometer 4-6" from the compres-
sor on the suction line. Ensure the thermometer makes
adequate contact and is insulated for best possible read-
ings. Use vapor temperature to determine superheat.
3. Refer to the superheat table provided for proper system
superheat. 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
60
10 13 17 20 23 26 29 30 31
65
8 1114161922262729
70
5 8 10 13 15 19 23 24 25
75
---- ---- 6 9 11 15 20 21 23
80
---- ---- ---- ---- 7 12 17 18 20
85
---- ---- ---- ---- ---- 8 13 15 16
90
---- ---- ---- ---- ---- 7 10 11 13
95
---- ---- ---- ---- ---- ---- 7 8 10
100
---- ---- ---- ---- ---- ---- ---- 7 8
105
---- ---- ---- ---- ---- ---- ---- ---- 7
110
---- ---- ---- ---- ---- ---- ---- ---- ----
115
---- ---- ---- ---- ---- ---- ---- ---- ----
SYSTEM SUPERHEAT + / - 1.0°
Outdoor Dry Bulb
Temperature, °F
Indoor Wet Bulb Temperature, °F