Sanyo 85464359982001 Two tubes arranged together, Three tubes arranged together

07-007 W-2WAY_II_NA 1/23/07 6:09 PM Page 65

6-3. Insulating the Refrigerant Tubing

Tubing Insulation

●Thermal insulation must be applied to all unit tubing, including the distribution joint (purchased separately).

*For gas tubing, the insulation material must be heat resistant to 248°F or above. For other tubing, it must be heat resistant to 176°F or above.

Insulation material thickness must be 25/64 in. or greater. If the conditions inside the ceiling exceed DB 86°F and RH 70%, increase the thickness of the gas tubing insulation material by 1 step.

If the exterior of the outdoor unit CAUTION valves has been finished with a

square duct covering, make sure you allow sufficient space to use the valves and to allow the panels to be attached and removed.

Taping the flare nuts

Wind the white insulation tape around the flare nuts at the gas tube connections. Then cover up the tubing connections with the flare insulator, and fill the gap at the union with the sup- plied black insulation tape. Finally, fasten the insulator at both ends with the supplied vinyl clamps. (Fig. 6-8)

Insulation material

The material used for insulation must have good insulation characteristics, be easy to use, be age resistant, and must not

Two tubes arranged together

Liquid tubing Gas tubing

Insulation

Three tubes arranged together

Cosmetic

(finishing) tape Gas tubing

Liquid tubing

Insulation	Balance tubing
	Fig. 6-7

Sealer (supplied)

	Insulation tape (white)
	(supplied)
		Flare insulator (supplied)
Unit side		Tube insulator
		(not supplied)
insulator		Heat resistant
		248°F or above

Flare nut

Vinyl clamps (supplied)

easily absorb moisture.

After a tube has been insulated, CAUTION never try to bend it into a narrow

curve because it can cause the tube to break or crack.

Drain insulator and clamp. Large (supplied)

Packing clamp. Small hose band (supplied)

Fig. 6-8

Refrigerant tubing and insulator (not supplied)

Drain pipe and insulator (not supplied)

Insulation

tape

Vinyl

Flare clamp

insulator

Seal

The procedure used for installing the insulator for both gas and liquid tubes is the same.

Fig. 6-9

Never grasp the drain or refrigerant connecting outlets when moving the unit.

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