Cautions For Service; Additional Refrigerant Charge; Service Tools - Mitsubishi Electric EHST20C-VM6HB Service Manual

[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) 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 refrigerant cylinder
· Check that cylinder for R410A on the market is syphon type.
· Charging should be performed with the refrigerant cylinder of syphon stood vertically. (Refrigerant is charged from liquid
phase.)

[3] Service tools

Use the service tools below as exclusive tools for R410A refrigerant.
No. Tool name
1
Gauge manifold
2
Charge hose
3
Electronic scale
4
Gas leak detector
Adaptor for reverse flow check
5
Refrigerant charge base
6
7
Refrigerant cylinder
Refrigerant recovery equipment
8
OCH531
Gravimeter
· Only for R410A
· Use the existing fitting specifications . (UNF1/2)
· Use high-tension side pressure of 5.3 MPa·G or over.
· Only for R410A
· Use pressure performance of 5.09 MPa·G or over.
· Use the detector for R14a, R407C or R410A
· Attach on vacuum pump.
· Only for R410A
· Cylinder with syphon
Specifications
·Top of cylinder (Pink)
5
Unit
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