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9-2-6. Refrigerant Charging
Required equipment:Bombe,R600a refrigerant (75g)
• First remove fire appliances and heating source for performing work when charging scaled refrigerant.(Do not spray
refrigerant indoor.)
• Measure the accurate quantity (75g)of refrigerant to charge it into a Bombe.
• Make the Bomber as vacuum status to charge refrigerant. (If there is air or moisture in a Bombe,it may give effect on
performance of a cooling cycle.)
• Please manage refrigerant quantity as 75g11.Different from R134a,R600a gives much effect on cooling performance
depending on change of refrigerant quantity.
♦ GR-1137GPNM Model uses refrigerant 42g
♦ GR-3137GPNM Model uses refrigerant 44g
Refrigerant quantity =Weight after charging -Weight before charging (weight of vacuumed Bombe)
• Connect Bombe with a charging tube to charge refrigerant.
• Turn on power of refrigerator to operate a compressor.
• Measure Bombe weight after 5 through 10 minutes to check remained refrigerant quantity to complete charging of refrigerant.
(After charging refrigerant,never perform welding work or work using fire appliances.)
9-2-7. Leak Inspection and Cycle Check
Required equipment:Leakage checking machine (foam and leakage inspection machine)
• Check f
or leakage by using form or a leakage inspection machine at the worked part if charging of refrigerant is completed.
• Check for leakage at the low pressure part with the compressor stopped,and check at the high pressure part with the
compressor being operating.
• If leakage is detected,proceed to repair according to repair process again starting from“2-1. Return of Refrigerator Refrigerant
”.(Never perform welding work or work using fire appliances.)
• Check that h
eat remains at a discharge pipe or condenser with the hands if leakage check is completed.If heat
remains,the
cooling cycle is normal.(Take care since a discharge pipe may be hot.)
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