Insulating The Refrigerant Tubing - Panasonic S-15MF3E5AN Installation Instructions Manual

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 flare 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.
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.
NOT E
If noise bothers you from the area between indoor and outdoor units' connection pipes, it is
effective to wind the soundproofing materials (field 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.
Flare insulator
(supplied)
Unit side
Flare nut
Flare union
Two tubes arranged together
Liquid tube
Insulation tape
(supplied)
Tube insulator
(not supplied)
Heat resistant
120°C or above
37
Insulation
Gas tube