3
[2] Refrigerant recharging
(1) Refrigerant recharging process
1
Direct charging from the cylinder.
·R407C cylinder are available on the market has a syphon pipe.
·Leave the syphon pipe cylinder standing and recharge it.
(By liquid refrigerant)
(2) Recharge in refrigerant leakage case
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
[1] Cautions for service
·After recovering the all refrigerant in the unit, proceed to working.
·Do not release refrigerant in the air.
·After completing the repair service, recharge the cycle with the specified amount of
liquid refrigerant.
Gravimeter
Unit
[3] Service tools
Use the below service tools as exclusive tools for R407C refrigerant.
No.
Tool name
Specifications
1
Gauge manifold
·Only for R407C.
·Use the existing fitting SPECIFICATIONS. (UNF7/16)
·Use high-tension side pressure of 3.43MPa·G or over.
2
Charge hose
·Only for R407C.
·Use pressure performance of 5.10MPa·G or over.
3
Electronic scale
4
Gas leak detector
·Use the detector for R134a or R407C.
5
Adapter for reverse flow check.
·Attach on vacuum pump.
6
Refrigerant charge base.
7
Refrigerant cylinder.
·For R407C
·Top of cylinder (Brown)
·Cylinder with syphon
8
Refrigerant recovery equipment.
OC357A--1.qxp 06.7.18 9:04 AM Page 3
