Toshiba RAV-SM801AT-E, RAV-SM1101AT-E No Good, Tightening of Connecting Part, Requirement

RAV-SM561AT-E, RAV-SM801AT-E

4 REFRIGERANT PIPING

Tightening of Connecting Part

	(Unit: N•m)
Outer diam. of copper pipe	Tightening torque
6.4 mm (diam.)	14 to 18 (1.4 to 1.8 kgf•m)
9.5 mm (diam.)	33 to 42 (3.3 to 4.2 kgf•m)
12.7 mm (diam.)	50 to 62 (5.0 to 6.2 kgf•m)
15.9 mm (diam.)	68 to 82 (6.8 to 8.2 kgf•m)

Flare at

indoor unit side

REQUIREMENT

1.Do not put the spanner on the cap. The valve may be broken.

2.If applying excessive torque, the nut may be broken according to some installation condi- tions.

•After the installation work, be sure to check gas leak of connecting part of the pipes with nitrogen.

NO GOOD

Flare at

outdoor unit side

•Align the centers of the connecting pipes and tighten the flare nut strong as far as possible with your fingers.

Then fix the nut with a spanner and tighten it with torque wrench as shown in the figure.

Half union or packed valve		Flare nut
Externally		Internally
threaded side		threaded side
Fix with spanner.	Tighten with torque wrench.

•As shown in the figure, be sure to use a double spanner to loosen or tighten the flare nut of the valve at gas side. If using a single spanner, the nut cannot be tightened with necessary tightening torque.

On the contrary, use a single spanner to loosen or tighten the flare nut of the valve at liquid side.

Flare nut

Spanner for work

Spanner for fixing

Loosened

Single spanner is prohibited

•Pressure of R410A is higher than that of R22 (Approx. 1.6 times). Therefore, using a torque wrench, tighten the flare pipe connecting sections which connect the indoor/outdoor units at the specified tightening torque. Incomplete connections may cause not only a gas leak, but also a trouble of the refrigeration cycle.

Do not apply refrigerating machine oil to the flared surface.

Cap Tightened

SM80 type valve at gas side

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