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INSTALLATION
CAUTION
•
Before connecting the ducts, check that no sawdust or any other foreign material
(scaps of paper, vinyl, building material etc.) exist in the ducts.
•
Make sure service doors open easily and fan/ filter can be pulled out.
•
Pay attention to the warnings before connecting the units to ducts.
Preparation of roof bolts
Hang the rubber anti-vibration pad to the bolt and balance the unit so that it remain
horizontally. Make sure the unit is attached securely with a lock nut.
CAUTION
Control the strength of the bolts before installation.
CAUTION
Do not install the ducts as shown on the following figures. Doing so will
increase the pressure drop, decrease the air volume from the unit and
give rise to abnormal sounds.
Extremely
sharp bends
The distribution ducts should be connected to the unit through rigid or semi flexible ducts
in order to avoid abnormal sounds and vibration. Flexible ducts may also be used ensuring
that the structure of the duct does not block the air stream and cause vibration. The unit is
equipped with pre-drilled duct flanges made of ABS for distribution duct connections.
1 Set the supplied ABS-made duct adapter to each duct connection to assure a good junction
of the ducts.
2 Fit the ducts securely into the duct connection flanges and wind Aluminum tape to prevent
air leakages.
3 Suspend the ducts from the ceiling so that their weight will not be applied to the unit.
4 The outdoor ducts must be covered with heat insulating material in order to prevent
forming of condensation.
Multiple
Bends right next
Bends
to the outlet.
7
Recuperator
Anti-vibration pad
(vibration absorber)
Sudden contraction and/or
expansions in duct diameter
Bolt (M10 or M12)
Nut
Washer
Lock nut
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