5. Set the refrigerant cylinder onto the electronic scale, then correct the hose the cylinder and to the connection port for the
electronic scale. (1)(2)
Precaution:
Be sure to set up the cylinder for liquid charging. If you use a cylinder equipped with a siphon tube, you can charge the liquid
without having to turn the cylinder around
6. Remove the charging hose of the manifold gauge from the vacuum pump adaptor, and connect it to the connection port of the
electronic scale. (2)(3)
7. Open the valve of the refrigerant cylinder, then open the charging valve slightly and close it. Next, press the check valve of the
manifold gauge and purge the air. (2)(4) (Watch the liquid refrigerant closely at this point.)
8. After adjusting the electronic scale to zero, open the charging valve, then open the valve Lo of the manifold gauge and charge
with the liquid refrigerant. (2)(5) (Be sure to read the operating instructions for the electronic scale.)
9. If you cannot charge the stipulated amount, operate the unit in the cooling mode while charging a little of the liquid at a time
(about 150 g/time as a guideline). If the charging amount is insufficient from one operation, wait about one minute, then use the
same procedure to do the liquid charging again.
Precaution:
Never use the gas side to allow a larger amount of liquid refrigerant to be charged while operating the unit.
10. Close the charging valve, and after charging the liquid refrigerant inside the charging hose, fully close the valve Lo of the
manifold gauge, and stop the operation of the unit. (2)(5)
11. Quickly remove the charging hose from the service port. (6) If you stop midway through, the refrigerant that is in the cycle will
be discharged.
12. After putting on the caps for the service port and operating valve, inspect around the caps for a gas leak. (6)(7)
Fig. 13 Re-charging refrigerant
11.4.6. Brazing
As brazing requires sophisticated techniques and experiences, it must be performed by a qualified person.
In order to prevent the oxide film from occurring in the pipe interior during brazing, it is effective to proceed with brazing while letting
dry nitrogen gas (N2) flow.
54
CS-V7CKP CU-V7CKP5 / CS-V9CKP CU-V9CKP5 / CS-V12CKP CU-V12CKP5
Summary of Contents for CU-V7CKP5
Page 12: ...4 Dimensions 12 CS V7CKP CU V7CKP5 CS V9CKP CU V9CKP5 CS V12CKP CU V12CKP5...
Page 13: ...13 CS V7CKP CU V7CKP5 CS V9CKP CU V9CKP5 CS V12CKP CU V12CKP5...
Page 14: ...5 Refrigeration Cycle Diagram 14 CS V7CKP CU V7CKP5 CS V9CKP CU V9CKP5 CS V12CKP CU V12CKP5...
Page 15: ...6 Block Diagram 15 CS V7CKP CU V7CKP5 CS V9CKP CU V9CKP5 CS V12CKP CU V12CKP5...
Page 63: ...63 CS V7CKP CU V7CKP5 CS V9CKP CU V9CKP5 CS V12CKP CU V12CKP5...
Page 64: ...64 CS V7CKP CU V7CKP5 CS V9CKP CU V9CKP5 CS V12CKP CU V12CKP5...
Page 72: ...72 CS V7CKP CU V7CKP5 CS V9CKP CU V9CKP5 CS V12CKP CU V12CKP5...
Page 74: ...19 1 REMOTE CONTROL 74 CS V7CKP CU V7CKP5 CS V9CKP CU V9CKP5 CS V12CKP CU V12CKP5...
