2 Unit installation
Optional accessories
SMGB0099 rev.0 - 12/2016
80
Remarks for PD-75A
Indoor unit HP
Maximum capacity of fresh air intake (m
3
/min)
(1.0-2.5) HP
1.0
(3.0-6.0) HP
2.0
The outdoor air inlet duct reference PD-75A resistance data, is indicated in the following figure. Use as a guide for fan
selection.
40
20
0
0
1
2
60
Air flow volume
Pass ressistance
Example of the duct fan installation
Nº
Part
1
Duct (made of non-combustible materials only)
2
Thermal insulation (non-combustible materials)
3
Outdoor air inlet hood with gallery (attached drip-proof hood type)
4
Air filter
5
Duct fan
6
Service panel
7
Damper
The air through the duct does not pass through the air filter of the indoor units. Fit an air filter (Field supplied) to the
suction side of the outdoor air inlet duct in a position that allows for easy maintenance operations.
Insulate the duct and its connection using fireproof insulating materials only.
?
N O T E
The parts shown in the above figure will be field-supplied.
Install an inspection panel -6- below the duct fan so that maintenance operations can be carried out on the air filter and
the damper.
Always use a damper and adjust the amount of air where a fan with a supply volume higher than the outdoor air inlet
volume limit is used.
