This air conditioner uses a drain up motor. Horizontally install
the unit using a level gauge.
CEILING OPENING DIMENSIONS AND HANGING BOLT
LOCATION
The paper model for installation expand or shrink according to
temperature and humidity.
Check on dimensions before using it.
CAUTION During the installation, care must be taken not to
damage electric wires.
• The dimensions of the paper model for installations the
same as those of the ceiling opening dimensions.
• Be sure to discuss the ceiling drilling work with the workers
concerned.
Refrigerant is charged to the outdoor unit. For details, see the
manual for installation work of outdoor unit. (Additional
charging, etc.)
1. Brazing for piping.
a. Execute brazing before tightening the flare nut.
b. Brazing must be executed while blowing nitrogen gas.
(This prevents generation of oxidized scale in copper
pipe.)
2. When there is a lot of brazings for long piping, install a
strainer midway of the piping. (The strainer is locally
supplied.)
3. Use clean copper pipe with inner wall surface free from mist
and dust. Blow nitrogen gas or air to blow off dust in the
pipe before connection.
4. Form the piping according to its routing. Avoid bending and
bending back the same piping point more than three times.
(This will result in hardening of the pipe).
5. After deforming the pipe, align centers of the union fitting of
the indoor unit and the piping, and tighten them firmly with
wrenches.
6. Connect pipe to the service valve or ball valve which is
located below the outdoor unit.
7. After completed the piping connection, be sure to check if
there is gas leakage in indoor and outdoor connection.
11.2.2. INSTALLATION OF INDOOR UNIT
POSITIONS OF AIR CONDITIONER BODY AND CEILING SURFACE
11.2.3. REFRIGERANT PIPING
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CS-E15DB4EW CU-E15DBE / CS-E18DB4EW CU-E18DBE / CS-E21DB4ES CU-E21DBE