Mitsubishi Electric PCA Series Service Manual page 4

[1] Cautions for service

(1) Perform service after recovering the refrigerant left in unit completely.

(2) Do not release refrigerant in the air.

(3) After completing service, charge the cycle with specified amount of refrigerant.

(4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.

[2] Additional refrigerant charge

When charging directly from cylinder

(1) Check that cylinder for R410A on the market is a syphon type.

(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)

[3] Service tools

Use the below service tools as exclusive tools for R410A refrigerant.

No.

Tool name

1

Gauge manifold

2

Charge hose

3

Electronic scale

4

Gas leak detector

5

Adaptor for reverse flow check

6

Refrigerant charge base

7

Refrigerant cylinder

8

Refrigerant recovery equipment

OCH638

Electronic weighing scale

Only for R410A

Use the existing fitting specifications . (UNF1 2)

Use high-tension side pressure of

Only for R410A

Use pressure performance of 3 .2 SIG

Use the detector for R134a, R40 C or R410A.

Attach on vacuum pump.

Only for R410A

Cylinder with syphon

Unit

Specifications

.

—

—

Top of cylinder ( ink)

—

4

SIG

.3

a.G or over.

.0

a.G or over.