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506695−01 11/10
TO LIQUID
LINE SERVICE
VALVE
TEMPERATURE
SENSOR
DIGITAL SCALE
REFRIGERANT TANK
TEMPERATURE SENSOR
(LIQUID LINE)
MANIFOLD GAUGE SET
A
Close manifold gauge set valves and connect the center hose to a cylinder of HCFC−22. Set for liquid phase charging.
B
Connect the manifold gauge set’s low pressure side to the true suction port.
C
Connect the manifold gauge set’s high pressure side to the liquid line service port.
D
Position temperature sensor on liquid line near liquid line service port.
OUTDOOR UNIT
CHARGE IN
LIQUID PHASE
CONNECTIONS FOR TESTING AND CHARGING
GAUGE SET
A
C
D
LOW
HIGH
B
INSIDE OUTDOOR UNIT
TRUE SUCTION
PORT
CONNECTION
NOTE Refrigerant tank should be
turned right−side−up to deliver vapor
during charge optimizing procedure.
Figure 14. Gauge Set Connections for Initial Weigh
WEIGH−IN CHARGING
Liquid Line
Set Diameter
Ounces per 5 feet (g per 1.5 m)
adjust from 15 feet (4.6 m) line set*
3/8" (9.5 mm)
3 ounce per 5’ (85 g per 1.5 m)
NOTE − *If line length is greater than 15 ft. (4.6 m), add this
amount. If line length is less than 15 ft. (4.6 m), subtract this
amount.
Refrigerant Charge per Line Set Length
ADD AMOUNT OF HCFC−22
REFRIGERANT AS SPECIFIED ON UNIT
NAMEPLATE
ADJUST AMOUNT FOR VARIATION IN
LINE SET LENGTH AS LISTED BELOW
TOTAL CHARGE
+
=
Figure 15. Gauge Set Charge Setup and Weigh In