3
OCH715
3
[1] Cautions for service
(1) Perform service after collecting the refrigerant left in the unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) When performing service, install a filter drier simultaneously.
Be sure to use a filter drier for new refrigerant.
[2] Additional refrigerant charge
When charging directly from cylinder
(1) Check that cylinder for R410A on the market is syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Electronic weighing scale
Unit
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name Specifications
1
Gauge manifold · Only for R410A
· Use the existing fitting
specifications
. (UNF1/2)
· Use high-tension side pressure of 768.7 PSIG [5.3MPa.G] or over.
2
Charge hose · Only for R410A
· Use pressure performance of 738.2 PSIG [5.09MPa.G] or over.
3
Electronic weighing scale
—
4
Gas leak detector · Use the detector for R134a, R407C or R410A.
5
Adaptor for reverse flow check · Attach on vacuum pump.
6
Refrigerant charge base
—
7
Refrigerant cylinder · Only for R410A Top of cylinder (Pink)
Cylinder with syphon
8
Refrigerant recovery equipment
—
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