3
[3] Refrigerant recharging
(1) Refrigerant recharging process
1
Direct charging from the cylinder.
· R407C cylinder are available on the market with a syphon pipe.
· Leave the syphon pipe cylinder standing and recharge it. (By liquid refrigerant)
(2) Recharge in refrigerant leakage case
· After recovering all the refrigerant in the unit, repairs/servicing can proceed.
· Do not release the refrigerant in the air.
· After completing the repair service, recharge the circuit with the specified amount of liquid refrigerant.
Gravimeter
Unit
[1] 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 R407C.
5
Adaptor 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.
[2] Notice on repair service
· After recovering all the refrigerant in the unit, repairs/servicing can proceed.
· Do not release refrigerant in the air.
· After completing the repair service, recharge the circuit with the specified amount of liquid refrigerant.
