Insulating The Refrigerant Tubing - Panasonic S-12MU1U6 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.
CAUTION
Taping the fl are nuts
Wind the white insulation tape around the fl are nuts at the
gas tube connections. Then cover up the tubing
connections with the fl are insulator, and fi ll 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)
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. (Fig. 5-9)
CAUTION
VRF_Indoor_US.indb 73 VRF_Indoor_US.indb 73
If the exterior of the outdoor
unit valves has been fi nished
with a square duct covering,
make sure you allow
suffi cient space to use the
valves and to allow the
panels to be attached and
removed.
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.
Two tubes arranged together
Liquid tubing
Insulation
Three tubes arranged together
Cosmetic
(fi nishing) tape
Liquid tubing
Insulation
Three tubes arranged together
Cosmetic
(fi nishing) tape
Discharge tubing
Balance tubing
Insulation
Fig. 5-7
Sealer (supplied)
Insulation tape (white)
(supplied)
Unit side
insulator
Flare nut
Vinyl clamps (supplied)
Fig. 5-8
Refrigerant tubing and insulator
(not supplied)
Drain insulator
Drain pipe and insulator
and clamp.
(not supplied)
Large
(supplied)
Packing
clamp.
Small
hose
band
(supplied)
Seal
Fig. 5-9
Never grasp the drain or refrigerant connecting outlets
when moving the unit.
73
Gas tubing
Gas tubing
Balance tubing
Suction tubing
Liquid tubing
Flare insulator (supplied)
Tube insulator
(not supplied)
Heat resistant
248°F or above
Insulation
tape
Vinyl
clamp
Flare
insulator
The procedure used for
installing the insulator
for both gas and liquid
tubes are the same.
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