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12-3. Tools Specifically for R410A

For servicing, use the following tools for R410A

Gauge manifold

Charging hose

Gas leak detector

Refrigerant cylinder

Charging cylinder

Refrigerant recovery unit

Vacuum pump with anti-reverse flow (*1)

(Solenoid valve-installed type, which prevents oil from flowing back into the

unit when the power is off, is recommended.)

Vacuum pump (*2)...can be used if the following adapter is attached.

Vacuum pump adapter (reverse-flow prevention adapter) (*3).

(Solenoid valve-installed adapter attached to a conventional vacuum pump.)

Electronic scale for charging refrigerant

Flare tool

Bender

Torque wrench

Cutter, reamer

Welding machine, nitrogen gas cylinder

Tools specifically for R410A

Tool Distinction

Tool Name

Tools which can be com-

monly used for R22,

R407C, and R410A

CAUTION

The above tools specifically for R410A must not be used for R22 and R407C.

Doing so will cause malfunction of the unit.

For the above vacuum pump (*1, *2) and vacuum pump adapter (*3), those for

R22-type units can be used for R410A-type. However, they must be used

exclusively for R410A and never alternately with R22 and R407C.

For details on tubing installation procedures, refer to the installation manuals attached to the indoor

unit and outdoor unit.

To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, sizes of the service ports

and flare nuts of the narrow tube service valve and wide tube service valve have been altered.

12-4. Tubing Installation Procedures

When the tubes are connected,

always apply HAB oil on the flare portions to improve the sealing of tubing.

The following is the HAB oil generally used:

Esso: ZERICE S32

NOTE