be purged each time a full container of refrigerant is connected, and changing containers should
be done as quickly as possible to minimize the loss of refrigerant.
Refrigerant is furnished in cylinders containing either 30, 50, 125, 1,025 or 1750 lbs. (13.6, 22.6, 56.6,
464 or 794 kg) of refrigerant.
Note:
The nameplate on the chiller contains the correct refrigerant charge information for the
chiller.
Checking the refrigerant charge during unit shutdown
The refrigerant charge is specified for each chiller model. Charge the correct amount of refrigerant
and record the level in the evaporator sight glass.
The refrigerant charge should always be checked and trimmed when the system is shut down.
The refrigerant charge level must be checked after the pressure and temperature have equalized
between the condenser and evaporator. This would be expected to be 4 hours or more after the
compressor and water pumps are stopped. The level should visible in the sight glass.
Charge the refrigerant in accordance with the method shown under the
. The
refrigerant level should be observed and the level recorded after initial charging.
Handling refrigerant for dismantling and repairs
If it becomes necessary to open any part of the refrigerant system for repairs, it is necessary to
remove the charge before opening any part of the unit. If the chiller is equipped with optional
valves, the refrigerant can be isolated in either the condenser, or evaporator or compressor, while
making any necessary repairs.
35
Model YK Style G R-134a or R-513A
