Design Technical Manual

Table Of Contents
3-5. INSTALLATION ON EACH FLOOR
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Precautions when installing on each oor
When installing the product on each oor, be careful because updraft may cause a short
circuit. If a short circuit occurred, the cooling and heating capacity and EER, COP (efciency)
may drop and in the worst case, high pressure protection may cause operation to stop.
Regarding the installation dimensions, refer to the gure below and provide an ample intake
space.
Provide service space and refrigerant piping and electric wiring space.
Install an outlet duct at each outdoor unit.
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Installation example when installed on each oor
An installation example assuming conditions like those shown in the table below is shown in
the gure below
Height / oor Capacity / oor Number of installable oors
13ft. (4000mm) 24 Ton 20 oors
If the installation differs from the example, be careful to avoid short circuiting.
The outlet air velocity Vo = 18 to 25 ft./s (5.5 to 7.5m/s)
The intake air velocity Vi = 4 ft./s (1.2m/s) or less.
[Example of each oor]
8 (200) or
more
8 (200) or
more
20 (500) or
more
20 (500) or
more
front rear
rearrearrear
158
(4000)
Vi
Vo
4(100)
or more
4(100)
or more
8 (200) or
more
20 (500) or
less
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When installing a louver
When installing a louver, pay attention to the following:
Fit the outlet duct tightly to the louver so that short circuit will not occur.
Make the louver angle 0° to 20° down.
If installed facing up, short circuit is easily generated by updraft.
Make the opening ratio of the outlet louver 75% or greater.
Unit : in. (mm)
- (03 - 24) -
OUTDOOR
UNITS
OUTDOOR
UNITS