Insulating The Refrigerant Tubing - Panasonic S-12MY2U6 Installation Instructions Manual

5-3. Insulating the Refrigerant Tubing

Tubing Insulation
● Thermal insulation must be applied to all units tubing, including
distribution joint (local supply).
* For gas tubing, the insulation material must be heat resistant
to 248°F (120°C) or above. For other tubing, it must be heat
resistant to 176°F (80°C) or above.
Insulation material thickness must be 13/32" (10 mm) or
greater.
If the conditions inside the ceiling exceed DB 86°F (30°C) 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 a square duct covering, make sure you
CAUTION
allow sufficient space to access 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)
Heat Insulation
Be sure to perform heat insulation on the drain, liquid and gas piping.
CAUTION
Imperfection in heat insulation work leads to water leakage.
(1) Use the heat insulation material for the refrigerant piping
which has an excellent heat-resistance (over 248°F (120°C)).
(2) Precautions in high humidity circumstance.
This air conditioner has been tested according to the "JIS
Standard Conditions with Mist" and have been confirmed that
there are no faults. However, if it is operated for a long time
in high humid atmosphere (dew point temperature: more than
73.4°F (23°C)), water drops are liable to fall. In this case, add
heat insulation material according to the following procedure:
• Heat insulation material to be prepared... Adiabatic glass
wool with thickness 13/32" (10 mm) to 25/32" (20 mm).
• Stick glass wool on all air conditioners that are located in
ceiling atmosphere.
• In addition to the normal heat insulation (thickness: more
than 5/16" (8 mm)) for refrigerant piping (gas piping: thick
piping) and drain piping, add a further of 13/32" (10 mm)
to 1 3/16" (30 mm) thickness material.
–
Wall seal
● When the outdoor unit is installed on a higher position than the
indoor unit, install the trap so as not to instill rain water into the
wall by transmitting in piping.
● Stuff the space among piping, the electric wire, and the drain
hose with putty and seal the penetration wall hole. Make sure
that rain water do not instill into the wall.
* Put the incision at the trap part of the heat insulator (for water
drain)
Two tubes arranged together
Liquid tubing
Insulation
Band
(Accessory)
Indoor
unit
Pipe down
Indoor
unit
Drain pipe
15
Gas tubing
Overlap with heat
insulator for piping.
Heat insulator for piping
(Local supply)
Heat insulator
(Accessory)
Putty
Pipe
Fig. 5-7
Fig. 5-8
Trap
Incision
Fig. 5-9