Design Technical Manual

Table Of Contents
3. INSTALLATION SPACE
Caution
When installing the outdoor unit, pay attention to the following items.
To prevent shut down due to discharge air short circuiting, reduction in capacity and high pressure
protection, refer to the installation space requirements shown in the following diagrams in order to
provide sufficient space.
Provide sufficient space to allow for rigging and setting of unit, installation, maintenance and
access.
Do not obstruct discharge air flow. Provide discharge duct if required for proper air discharge.
If there is a wall in front of the unit, provide 20in. (500mm) or more clearance for maintenance.
If there is a wall on the left side of the unit, provide 2in. (30mm) or more clearance for maintenance.
When installing units, provide sufficient space for refrigerant piping.
An outdoor temperature of 95°F (35°C) (DB) in air-conditioned operation is assumed for the
installation space in this item. If the outdoor temperature exceeds 95°F (35°C) (DB) and the
outdoor unit is operating at a load exceeding its rated ability, provide a larger inlet space.
3-1. WHEN INSTALLATION IS NEAR LIMITED HEIGHT WALL
SINGLE AND MULTIPLE INSTALLATIONS
There are no restrictions on the height of the side wall.
Provide installation spaces L1 and L2 in accordance with the table below according to the
wall height (front side, rear side) conditions.
Provide installation spaces other than L1 and L2 in accordance with the conditions shown in
the gure below.
Air ow resistance can be ignored when the distance from a wall or other equipment is more
than 79in. (2m)
Wall height condition Necessary installation space
When H1 is 59 (1500) or less L1 ≥ 20 (500)
When H1 is 59 (1500) or more L1 ≥ 20 (500) + h1 ÷ 2
When H2 is 19 (500) or less L2 ≥ 4 (100)
When H2 is 19 (500) or more L2 ≥ 4 (100) + h2 ÷ 2
Unit : in. (mm)
h1
59(1500)
H1
L1
L2
19(500)
h2
H2
<Side view>
Front Rear
Wall Wall
L2
L1
<Top view>
2 (30) or
more
1 (10) or
more
Single installation
Side wall
Side wall
Front
Rear
L2
L1
<Top view>
Side wall
Side wall
Multiple installations
Front
Rear
2 (30) or
more
1 (20) or
more
1 (20) or
more
1 (10) or
more
<Front view>
Side
wall
Side
wall
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OUTDOOR
UNITS
OUTDOOR
UNITS