32
11.1.5 Heat
Insulation
Be sure to perform heat insulation on the drain, liquid and gas piping. 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:
o
Heat insulation material to be prepared… Adiabatic glass wool with thickness 3/8" to 1 3/16" (10 to
20 mm).
o
Stick glass wool on all air conditioners that are located in ceiling atmosphere.
o
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 3/8" (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.
Overlap with heat
insulator for piping.
Indoor
unit
Band
(Accessory)
Heat insulator
for piping
(Local supply)
Heat insulator
(Accessory)
Hose clip (Accessory)
Heat insulator (Local supply)
(The thickness must be at
least
5
/
16
"
(8 mm).)
Flexible hose with
heat insulator
(Accessory)
PVC pipe
(O.D. ø1
"
(ø26)
(Local
supply)
To be glued
It may be required to take off this part for checking or
servicing the drain up motor. Please do not glue.
Make sure that there is no clearance here.
Put the incision at the trap part of the heat
insulator (for water drain)
Pipe down
Indoor
unit
Pipe
Putty
Trap
Incision
Drain pipe
