14
Installation Procedure
English
Installation Pr
oc
edur
e
• Do not apply force to the piping on the unit side when
connecting the drain hose. The hose should not be
allowed to hang loose from its connection to the unit.
Fasten the hose to a wall, frame or other support as
close to the unit as possible.
Ceiling
Support pieces
1 to 1.5 m
(3.28~4.92 ft)
Slope of the horizontal drain pipe:
1/100 or more
• Install
horizontally.
Indoor unit
Be horizontal
Flexible hose
• Max. allowable aixs gap
Max. 20 mm (13/16 inch)
Indoor unit
• Max. allowable bending angle
đɇуߥߢઘ
Indoor unit
NOTE
• If a concentrated drain pipe is installed, refer to the
figure below.
Centralized horizontal drain pipe
(more than 1/100 slope)
Main drain pipe
Full thread bolt hanger
550 (21-5/8)
or less
200 (7-7/8)
or more
Individual
air vent
Main air vent
(must be installed)
Unit:mm(inch)
1 to 1.5 m (3.28~4.92 ft)
• If 3 or more units are installed, install the main air vent
at the front of the farthest indoor unit from the main
drain pipe.
• To prevent water from flowing back to indoor units, install
an individual air vent at the top of each indoor unit.
– The air vents should be T or 7 shaped to prevent
dust or foreign substances from entering.
– You may not need to install air vent if the horizontal
drain pipe is in proper slope.
Step 11 Performing the drainage test
1
Do a leak test at the connection part of the flexible
hose and the drain pipe:
a
Connect a general hose to the connection part of
the flexible hose of the indoor unit, and pour in
some water.
Hose
Flexible hose
Water leakage
check part
Summary of Contents for AM NN1DCH Series
Page 43: ...43 English Appendix Memo...
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