Toshiba RAV-SP1404AT8ZG-E 109, Optional Installation Parts Locally procured, EN-16, 17-EN

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￿Optional Installation Parts (Locally procured)

	Parts name	Q’ty
	Refrigerant piping
A	Liquid side: Ø9.5 mm	One each
	Gas side: Ø15.9 mm
B	Pipe insulating material	1
	(polyethylene foam, 10 mm thick)
C	Putty, PVC tape	One each

Flaring

1. Cut the pipe with a pipe cutter.

Be sure to remove burrs that may cause a gas leak. 2. Insert a flare nut into the pipe, and then flare the pipe.

Use the flare nuts supplied with the air conditioner or those for R410A.

Insert a flare nut into the pipe, and flare the pipe. As the flaring sizes of R410A differ from those of refrigerant R22, the flare tools newly manufactured for R410A are recommended.

However, the conventional tools can be used by adjusting the projection margin of the copper pipe.

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￿Tightening of Connecting Part

1. Align the centers of the connecting pipes and fully tighten the flare nut with your fingers. Then fix the nut with a wrench as shown in the figure and tighten it with a torque wrench.

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

CAUTION

1. Do not put the crescent wrench on the cap or cover. The valve may break.

2. If applying excessive torque, the nut may break according to some installation conditions.

NO GOOD Cover

– 109 –

￿Refrigerant Piping Connection

CAUTION

TAKE NOTE OF THESE 4 IMPORTANT POINTS BELOW

FOR PIPING WORK

1. Keep dust and moisture away from inside the connecting pipes.

2. Tightly connect the connection between pipes and the unit.

3. Evacuate the air in the connecting pipes using a

VACUUM PUMP.

4.Check for gas leaks at connection points.

Piping connection

	Liquid side
Outer diameter		Thickness
Ø9.5 mm		0.8 mm

Projection margin in flaring: B (Unit: mm)

B

Rigid (Clutch type)

Outer diam. of	R410A tool used				Conventional tool
copper pipe					used
			R410A
9.5		0 to 0.5			1.0 to 1.5
15.9
Flaring diameter size: A (Unit: mm)
				A

2. As shown in the figure, be sure to use two wrenches to loosen or tighten the flare nut of the valve on the gas side. If you use a single crescent, the flare nut cannot be tightened to the required tightening torque.

On the other hand, use a single crescent to loosen or tighten the flare nut of the valve on the liquid side.

	(Unit: N•m)
Outer dia. of copper pipe	Tightening torque
9.5 mm (diam.)	33 to 42 (3.3 to 4.2 kgf•m)
15.9 mm (diam.)	68 to 82 (6.8 to 8.2 kgf•m)

	Cover
Cap
Loosened	Piping valve

Cap

•After the installation work, be sure to check for gas leaks of the pipe connections with nitrogen.

•Pressure of R410A is higher than that of R22 (Approx.

1.6 times).

Therefore, using a torque wrench, tighten the flare pipe connecting sections that connect the indoor/outdoor units at the specified tightening torque.

Incomplete connections may cause not only a gas leak, but also trouble with the refrigeration cycle.

Do not apply refrigerating machine oil to the flared surface.

	Gas side
Outer diameter		Thickness
Ø15.9 mm		1.0 mm

Outer diam. of copper pipe	A+0
	–0.4
9.5	13.2
15.9	19.7

*In case of flaring for R410A with the conventional flare tool, pull the tool out approx. 0.5 mm more than that for R22 to adjust it to the specified flare size.

The copper pipe gauge is useful for adjusting the projection margin size.

Tightened

Flare nut

Valve at gas side

EN-16 16 17 17-EN