5-3. Insulating The Refrigerant Tubing - Panasonic U-72MF1U9 Installation Instructions Manual

5-3. Insulating the Refrigerant Tubing

Tubing Insulation
● Thermal insulation must be applied to all unit tubing,
including the distribution joint (purchased separately).
(Fig. 5-7)
* 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
valves has been finished with
CAUTION
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 supplied black insulation tape.
Finally, fasten the insulator at both ends with the
supplied vinyl clamps. (Fig. 5-8)
Two tubes arranged together
Liquid tubing
Insulation
Three tubes arranged together
Cosmetic
(finishing) tape
Liquid tubing
Insulation
Four tubes arranged together
Cosmetic
(finishing) tape
Discharge tubing
Balance tubing
Insulation
Sealer (supplied)
Insulation tape (white)
Unit side
insulator
Flare nut
Vinyl clamps (supplied)
34
Gas tubing
Gas tubing
Balance tubing
Suction tubing
Liquid tubing
Fig. 5-7
(supplied)
Flare insulator (supplied)
Tube insulator
(not supplied)
Heat resistant
248°F or above
Fig. 5-8