Duct Connection - Hitachi RCI Service Manual

2 Unit installation
Prepare the sling bolts.
Fit the anchor bolts on the suspension bracket and adjust to ensure
the unit is installed horizontally.
Thread on the nuts and fit the washers for all the bolts, as shown
in the figure.
Fit two suspension brackets onto the nut and washer of each bolt,
starting on one side.
Check that the nuts and washers are correctly secured with the
suspension bracket retainers and fit the brackets onto their nuts
and washers on the other side.
C A U T I O N
The unit control box is fragile. Do not apply force to the control box.
Where the sling bolts are too short, fit the suspension bracket in an alternative position.
1 Remove the bolts from the upper installation position.
2 Remove the suspension brackets and fit in a higher installation position.
3 Tighten the bolts in the holes from which the suspension brackets have been removed to avoid air leaks.
C A U T I O N
• Before lifting the unit, prepare any necessary means (ladders, scaffolding, elevator platform, etc.) and check
that the current safety regulations in the place where the installation is taking place are met.
• Check that the lifting work can be carried out without the risk of injuries to you or others in the surrounding
area.
• Request the assistance of another person to lift the unit.
Lift the unit carefully.
Check that the condensate discharge system in the unit works
correctly. To do so, check the level of the drain pan using a spirit
level or a clear flexible pipe full of water. The side of the unit on
which the drain hose is located must be around 5 mm lower than
the opposite side.
Apply a thread-locking product to the bolts and nuts to prevent them from loosening. Otherwise, abnormal noise may be
caused by mechanical vibrations and the indoor unit may become loose.
Apply protective paint to the bolts and nuts to prevent rusting.
C A U T I O N
Completely cover the unit with a sheet of plastic to protect it during installation work.

2.9.3 Duct connection

N O T E
• Use field-supplied flexible ducts to avoid abnormal acoustic vibrations.
• The unit is fitted with a pre-drilled hose to connect the supply duct.
63
SMGB0063 rev. 1 - 10/2010
2