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9-9-2. Charging additional refrigerant
Charge the calculated amount of refrigerant in the liquid state to the unit through the service port after the completion
of piping work. Upon completion of all work, securely tighten all service port caps and shaft caps to prevent refrigerant
leakage.
<Notice>
・Do not vent the refrigerant into the atmosphere.
・Refer to the table below for the appropriate tightening torque.
Pipe size [mm (in)]
Shaft cap (N·m)
ø22.2 (ø7/8)
ø28.58 (ø1-1/8)
・If the refrigerant tank does not have a siphon pipe, charge the liquid refrigerant with the tank upside-down as shown
in the figure below.
・After evacuation and refrigerant charging, ensure that the service valves are fully open. Do not operate the unit
with the service valves closed.
・Ensure that contamination of different refrigerants does not occur when using charging equipment. Hoses and
pipes shall be as short as possible to minimize the amount of refrigerant contained in them.
・The refrigerant tank shall be kept upright.
・Ensure that the refrigerant system is earthed prior to charging the system with refrigerant.
・Record the added refrigerant amount on the label attached to the control box panel for future servicing.
・Extreme care shall be taken not to overfill the refrigerant system.
WT09050X01
Shaft (N·m)
Size of hexagonal wrench [mm (in)]
22
-
22
-
Service port cap (N·m)
-
-
40
16
16
Ⓐ
Ⓐ
Siphon pipe
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