Hitachi 3HRNM1Q, Installation & Maintenance Manual

Page: 15 / 36

4.4 Installation Work
(1) Secure the outdoor unit with the anchor
bolts.
Fig. 4.2 Installation of Anchor Bolts
Fix the outdoor unit to the anchor bolts by
special washer of factory-supplied
accessory.
(2) When installing the outdoor unit, fix the unit
by anchor bolts. Refer to Fig. 4.3
regarding the location of fixing holes.
(3) Example of fixing outdoor unit by anchor
bolts.
Max. 21mm
Air Flow Direction
Anchor Bolt
M12
Base of Outdoor Unit
Nut
Special Washer
Filled Mortar
Concrete
Cut this portion when this type
of anchor bolt is used.
If not, it is difficult to remove
the service cover.
Concrete Anchor Bolt
Max. 21mm (After cut "A
" )
A
NOTE:
When the mark * dimension is secured, piping
work from bottom side is easy without
interference of foundation.
Fig. 4.3 Position of Anchor Bolts
Fig. 4.4 Fixing Example
Hole
for Anchor Bolt
(4) Fix the outdoor unit firmly so that declining,
making noise, and falling down by strong
wind or earthquake is avoided.
Fixing Plate
(Field-Supplied)
Both sides on the unit fixing
can be possible.
When vibration measures
are necessary,
add vibration proof rubber.
(Field-Supplied)
Fig. 4.5 Additional Fixing Arrangement
(5) When installing the unit on a roof or a
veranda, drain water sometimes turns to
ice in a cold morning. Therefore, avoid
draining in an area where people often use
because it is slippery.
(6) In case of the drain piping is necessary for
the outdoor unit, use the drain-kit
(DBS-26 or DBS-26L:Optional Parts) .
Drain Hole
Air Inlet
Drain Hole
(7) The whole of the base of the outdoor unit
should be installed on a foundation. When
using vibration-proof mat, it should also be
positioned the same way.
When installing the outdoor unit on a field-
supplied frame, use metal plates to adjust
the frame width for stable installation as
shown in Fig. 4.6.
(unit:mm)
(unit:mm)
(unit:mm)