Under Ceiling Type | Installation Manual |
5 DRAIN PIPING WORK
CAUTION
•Following the Installation Manual, perform the drain piping work so that water is properly drained, and apply a heat insulation so as not to cause a dew dropping.
Inappropriate piping work may result in water leakage in the room and wet of furniture.
Piping/Heat insulating material
Require the following materials for piping and heat insulating at site.
Piping | Hard vinyl chloride pipe VP20 | |
(Outer dia.: Ø1.0” (26 mm)) | ||
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Heat insulator | Foam polyethylene: | |
Thickness 0.4” (10 mm) or more | ||
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REQUIREMENT
•Be sure to perform heat insulation of the drain pipes of the indoor unit.
•Never forget to perform heat insulation of the connecting part with the indoor unit.
An incomplete heat insulation causes dew dropping.
•Set the drain pipe with downward slope (1/100 or more), and do not make swelling or trap on the piping. It may cause an abnormal sound.
•For length of the traversing drain pipe, restrict 65’7” (20 m) or less.
In case of a long pipe, provide support brackets with interval of 4’11” - 6’7” (1.5 - 2 m) in order to prevent waving.
4’11” - 6’7” (1.5 - 2 m) | Support |
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1/100 or more |
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downward |
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Thermal insulator |
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Arched shape | NO |
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Trap |
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•Set the collective piping as shown in the below figure.
As long as possible (3.9” (100 mm))
VP20 VP20 VP20
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| Extended |
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| ventilating |
VP30 or more | Downward slope | pipe |
| 1/100 or more |
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<Collective piping>
•Be sure not to apply force to the connecting part of the drain pipe.
•The hard
For connection with the drain pipe connecting port, be sure to use/fix the attached flexible hose with the hose band, otherwise a damage or water leak is caused on the drain pipe connecting port.
Drain pipe connecting |
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| Attached flexible hose |
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port (Hard socket) |
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| Attached hose band |
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| Attached hose band | |||
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Drain pan
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| Soft socket |
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| Soft socket |
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Adhesive agent |
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| VP20 vinyl chloride pipe | ||||||
prohibited |
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| (procured locally) | ||||
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Adhesive inhibited:
Use the attached flexible hose and hose band for connecting the drain hose to the clear drain socket. If applying the adhesive, socket will be damaged and cause water leakage.
Drain up
When not securing down slope on the drain pipe, use a Drain pump kit sold separately.
Also refer to the “Drain pump kit installation manual”. The drain pipe can be raised 23.6” (600 mm) from the top face of the main unit.
*When using Drain pump kit, both drain pipe and refrigerant pipe can be taken only from upper side.
*VP25 PVC pipe is needed when a drain pump is used.
EN |
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