3
[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 35kgf/cm
2
or over.
2
Charge hose
·Only for R407C.
·Use pressure performance of 52kgf/cm
2
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.
[2] Notice on repair service
·After recovering all the refrigerant in the unit, work may be started.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the system with the specified amount of the
liquid refrigerant.
[3] Refrigerant recharging
(1) Refrigerant recharging process
Direct charging from the cylinder.
·Confirm that the cylinder is suitable for syphoning.
·Raise the cylinder and recharge the unit by syphoning liquid refrigerant.
(2) Recharge when refrigerant leakage has occurred.
·After recovering all the refrigerant in the unit, work may be started.
·Do not release the refrigerant in the air.
·After completing the repair service, recharge the system with the specified amount of
the liquid refrigerant.
Gravimeter
Unit
OC236(181A)---1.qxp 01/9/27 5:30 PM Page 3
