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Drain piping
CAUTION
Following the Installation Manual, perform the drain piping work that water is properly drained, and apply a heat
insulation not to cause a dew condensation.
Inappropriate piping work may cause the water leakage in the room and wet of furniture.
REQUIREMENT
• The drain piping flows the natural drainage. Make sure to set the drain piping from the unit with descending slope of 1/50 to
1/100 and do not make up-down or trap in the midway.
• Set the horizontal pulling of the drain pipe to 65.7' (20 m) or less. When drain piping is too long, attach the support bracket
at intervals of 4'11" to 6'7" (1.5 m to 2 m) to avoid the pipe becomes undulant as shown in figure below.
• Be sure to connect the drain pipe to the air conditioner with adhesive to avoid water leakage from the joint portion.
• Condensation may occur on the drain pipes including collective pipes. All drain pipes must be wrapped with heat insulator
to prevent dew condensation. Especially a part where drain pipe is connected to the indoor unit must be firmly insulated with
the provided heat insulator.
Pipe material, size and insulator
The following materials for piping work and insulating process are locally procured.
Connecting drain pipe
REQUIREMENT
• Using adhesive agent for vinyl chloride, connect the hard vinyl chloride pipes certainly so that water does not leak.
• It takes some time to dry and indurate the adhesive agent. (Refer to the manual of adhesive agent.) Do not apply any extra
force on the connecting section until the adhesive agent dried.
Pipe material
Hard vinyl chloride pipe socket for VP25
Hard vinyl chloride pipe VP25 (Nominal outer diameter Ø1.3" (32 mm))
Insulator
Foamed polyethylene foam, thickness: 0.4" (10 mm) or more
<Example for installation of the main piping (Incl. piping support)>
4'11" to 6'7" (1.5 m to 2 m)
As long as possible
Up-down bend
Trap
VP-30
Descending slop of
1/50 to 1/100
Descending slop of
1/50 to 1/100
INCORRECT
Check the draining
Check the water drainage is surely performed at the test run. Check also no water leakage is found at the pipe
connecting part.
REQUIREMENT
• Be sure to check draining even if installing the unit in heating season.
• Using a kettle or hose, pour water gradually from the drain pan at the air supply port.
Service panel
Pour water into the drain pan using hose, etc.
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+00EHEH99887601.book Page 10 Thursday, April 21, 2016 9:44 AM
