Panasonic S-73MF3E5AN - Insulating the Refrigerant Tubing

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5-3. Insulating the Refrigerant Tubing
Tubing Insulation
● Thermal insulation must be applied to all units tubing,
including distribution joint (field supply).
* For gas tubing, the insulation material must be heat
resistant to 120°C or above. For other tubing, it must be
heat resistant to 80°C or above.
Insulation material thickness must be 10 mm or greater.
If the conditions inside the ceiling exceed DB 30°C and RH 70%, increase the thickness of
the gas tubing insulation material by 1 step.
CAUTION
If the exterior of the outdoor unit valves has been finished with a square duct covering,
make sure you allow sufficient space to access the valves and to allow the panels to be
attached and removed.
Tapingthearenuts
Wind the insulating tape around the flare nuts at the gas / liquid tube connections.
Then cover up the tubing connections with the flare insulator (supplied).
Wrap with the flare insulator facing its seam upward.
Flare insulator
(supplied)
Insulation tape
(supplied)
Tube insulator
(not supplied)
Heat resistant
120°C or above
Flare union
Flare nut
Unit side
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.
NOTE
If noise bothers you from the area between indoor and outdoor units’ connection pipes, it is
effective to wind the soundproong materials (eld supply) to reduce noise.
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.
Never grasp the drain or refrigerant connecting outlets when moving the unit.
Two tubes arranged together
Liquid tube
Insulation
Gas tube
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