Main Unit and Piping
Electrical
Test Operation
Reference
11
3. Installation
3-3. Foundation and anchor bolt specifications
1) Foundation shape
�
The foundation must have sufficient strength in accordance with the drawings below. In order to protect the out-
door unit from rain, dust or damage, the height of the foundation must be 8 inch (200) from the ground.
The foundation must have grooves around itself that directs drain water to the drainage port.
�
The foundation must support the mass of the outdoor unit evenly and must be flat and smooth so that water will
not accumulate on the upper surface.
�
Never use a foundation that consists of more than one piece of block. Such a foundation will not provide neces-
sary strength.
�
Condensation water may drip from the bottom of the outdoor unit. Install a drain pan if the condensation water
could cause problems.
Warning
�
The foundation must provide a firm and level surface for installing the outdoor unit so that the
outdoor unit does not tip over in the event of strong winds (gust, etc.) or earthquakes.
If the foundation strength is insufficient, the outdoor unit could tip over and cause fuel gas
leakage or injury.
Installation location/
Designed earthquake resistance
Foundation dimensions feet (mm)
Anchor bolt spacing feet (mm)
a
b
A
B
Ground/
Horizontal 0.4 G, Vertical 0.2 G
5-3/4’ (1750)
3’ 1/8” (956)
Important reminder
�
If the foundation is smaller than the specified dimensions or if the designed earthquake resis-
tance value needs to be higher than that shown in the table above, appropriate design change
such as connecting the foundation to the building (floor slab) with steel rods is necessary. Such
design changes should be done in accordance with the appropriate building equipment seismic
tolerance design and installation policy.
Anchor bolts
8 (200)
1-13/32 (35)
Drainage grooves
Chamfered corners
on the concrete
A
(Foundation concrete)
Anchor bolts
Length: inch (mm)
a or more
B
b or more
(F
oundation concrete)
(Anchor bolt
spacing)
(Anchor bolt
spacing)
>
s
n
o
i
s
n
e
m
i
d
n
o
it
a
d
n
u
o
F
<
>
n
o
it
a
ll
a
t
s
n
i
d
n
u
o
r
G
<
2’ 8” (841)
4’ (1100)