Sanyo CH0971, CH1271 service manual Tools Specifically for R410A, Tubing Installation Procedures

11-3. Tools Specifically for R410A

For servicing, use the following tools for R410A

Tool Distinction	Tool Name
	Gauge manifold
	Charging hose
	Gas leak detector
	Refrigerant cylinder
	Charging cylinder
	Refrigerant recovery unit
Tools specifically for R410A	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
Tools which can be com-	Bender
	Torque wrench
monly used for R22,	Cutter, reamer
R407C, and R410A
	Welding tool, nitrogen gas cylinder

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.

To prevent other refrigerants (R22, R407C) from being mistakenly charged to this unit, shape and external diameter of the service port screw has been altered.

<External diameter of service port>	R410A : 5/16"
	R22, R407C : 1/4"

11-4. 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 For details on tubing installation procedures, refer to the installation manuals attached to the indoor unit and outdoor unit.

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