6-3. Insulating the Refrigerant Tubing

Tubing Insulation

Thermal insulation must be applied to all unit tubing, including 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" 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.

Two tubes arranged together

Liquid tubing

Gas tubing

Insulation

Fig. 6-7

Taping the flare nuts

CAUTION

If the exterior of the outdoor unit 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.

Sealer (supplied)

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 supplied 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 easily absorb moisture.

CAUTION

After a tube has been

insulated, never try to bend it

 

 

 

into a narrow curve because it

 

can cause the tube to break or

 

crack.

 

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)

Fig. 6-8

 

Refrigerant tubing and insulator

Drain insulator

(not supplied)

Drain pipe and insulator

and clamp.

Large

(not supplied)

(supplied)

 

Packing

 

clamp.

Insulation

Small

tape

hose band

Vinyl

(supplied)

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.

63

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Sanyo 85464359981002 Insulating the Refrigerant Tubing Tubing Insulation, Two tubes arranged together, Insulation material

85464359981002 specifications

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