Panasonic S-200PE2E5 Technical Data & Service Manual page 52

1
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 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.
WARNING
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 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. 1- 26)
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.
WARNING
4. Taping the Tubes
(1) At this time, the refrigerant tubes (and electrical wiring
if local codes permit) should be taped together with
armoring tape in 1 bundle. To prevent condensation
from overflowing the drain pan, keep the drain hose
separate from the refrigerant tubing.
(2) Wrap the armoring tape from the bottom of the outdoor
unit to the top of the tubing where it enters the wall.
As you wrap the tubing, overlap half of each previous
tape turn.
(3) Clamp the tubing bundle to the wall, using 1 clamp
approx. each meter. (Fig. 1- 27)
NOTE
Do not wind the armoring tape too tightly since this will
decrease the heat insulation effect.
Also ensure that the condensation drain hose splits away
from the bundle and drips clear of the unit and the tubing.
5. Finishing the Installation
After finishing insulating and taping over the tubing, use sealing putty to seal
off the hole in the wall to prevent rain and draft from entering. (Fig. 1- 28)
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.
Liquid tubing
Insulation
Flare insulator (supplied)
Flare union
Unit side
Flare nut
Apply putty here
1-46
Two tubes arranged together
Gas tubing
Fig. 1- 25
Insulation tape
(white)(supplied)
Tube insulator
(not supplied)
Heat resistant
120°C or above
Fig. 1- 26
Clamp
Drain hose
Insulated tubes
Fig. 1- 27
Tubing
Fig. 1- 28