Panasonic S-22KA1E5S Service Manual page 142

11.10.5 INDOOR UNIT DRAIN PIPING
•
Drain piping must have down-slope (1/50 to
1/100); be sure not to provide up-and-down slope
to prevent reversal flow.
•
During drain piping connection, be careful not to
exert extra force on the drain port at the indoor
unit.
•
The outside diameter of the drain connection at
the indoor unit is 16 mm.
Piping material: Polyvinyl chloride pipe VP-16 and
pipe fittings.
•
Be sure to perform heat insulation on the drain
piping.
Heat insulation material: Polyethylene foam with
thickness more than 8 mm (local supply).
11.10.6 HEAT INSULATION
Be sure to perform heat insulation on the drain, liquid and gas piping. Imperfection in heat insulation work leads to water
Caution
leakage.
1. Use the heat insulation material for the refrigerant piping which has an excellent heat-resistance (over 120°C).
Band
(Accessory)
Indoor
unit
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 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 10 to 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 8 mm) for refrigerant
piping (gas piping: thick piping) and drain
piping, add a further of 10 mm to 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.
Heat insulator
for piping
(Local supply)
Heat insulator
(Accessory)
Indoor
unit
Pipe clamp
Down-slope
Hose clip (Accessory)
Heat insulator (Local
supply) (The thickness
must be at least 8 mm.)
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.
Pipe down
Indoor
unit
✳ Put the incision at the trap part of the heat insulator
(for water drain)
142
Upward routing
Trap
Flexible hose with
heat insulator
(Accessory)
PVC pipe
(O.D. ø16)
(Local supply)
To be glued
Putty
Pipe
Trap
Drain pipe
Incision