English
11
CAUTION
Be sure to insulate any field piping all the way to the piping connection inside the unit. Any exposed piping
may cause condensation or burns if touched.
7. DRAIN PIPING WORK
(1)
Carry out the drain piping
• Lay pipes so as to ensure that drainage can occur with no problems.
• Employ a pipe with either the same diameter or with the diameter larger (excluding the raising section)
than that of the connecting pipe (PVC pipe, nominal diameter 20 mm, outside diameter 26 mm).
• Keep the drain pipe short and sloping downwards at a gradient of at least 1/100 to prevent air pockets
from forming.
• If the drain hose cannot be sufficiently set on a slope, refer to PRECAUTIONS FOR DRAIN RAISING PIP-
ING on page 12.
• To keep the drain hose from sagging, space hanger bracket every 1 to 1.5 m.
CAUTION
Water pooling in the drainage piping can cause the drain to clog.
• Use the attached drain hose (1) and metal clamp (2).
• Insert the drain hose into the drain socket up to the base, and tighten the clamp securely within the portion of
a gray tape of the hose-inserted tip. Tighten the clamp until the screw head is less than 4 mm from the hose.
• Wrap the attached large sealing pad (10) over the metal clamp (2) and drain hose to insulate.
• Make sure that heat insulation work is executed on the following 2 spots to prevent any possible water
leakage due to dew condensation.
• Indoor drain pipe
• Drain socket
Hanger bracket
GOOD
WRONG
Fig. 17
Fig. 18
WRONG
gradient or more
1/100
Metal
clamp (2)
Metal
clamp (2)
Drain hose (1)
Tape (Gray)
4mm
(accessory)
(accessory)
(accessory)
(accessory)
Large sealing pad (10)
Fig. 19
Fig. 20
01_EN_3P184443-5S.fm Page 11 Friday, October 16, 2015 6:44 PM
