Air Duct Connection; Maintenance Of The Suction Air Filter - Hitachi RCI Service Manual

2 Unit installation
Check that the condensate discharge system in the indoor 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 front side.
Once adjusted, tighten the suspension bracket nuts.
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.
Secure the drain hose with the clamp and adhesive supplied.
C A U T I O N
Completely cover the unit with a sheet of plastic to protect it during installation work.

2.6.3 Air duct connection

N O T E
• Use field-supplied flexible ducts to avoid abnormal acoustic vibrations.
• RPI units are supplied with a standard air filter on the suction side. This filter is supplied for cases where no
suction duct is applied (or when the duct is very short).
Secure the flexible air duct to the outsides of the hoses supplied with the unit.
Bear in mind the following instructions depending on the installation
type:
1 Where the suction duct is not used, keep the standard air filter.
2 Where the suction duct is used, fit the air filter at the suction
duct inlet point, removing the standard air filter from the unit.
This air filter must be field-supplied or a factory-adapted one must be used.

2.6.4 Maintenance of the suction air filter

Simply remove the set screws from the bar -1- (RPIM units: 2
screws, RPI units: 3 screws) and remove it to pull the filter
downwards.
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SMGB0063 rev. 1 - 10/2010
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