User's Manual

Page 15
5. Back Draft Shutter System
Vertical Installation
Figure 9 shows an example of vertical installation.
Back Draft Shutter System Fitment to Bell-mouth Adaptor
This back draft shutter suitable for Isodrive 650 motor only. This back draft shutter system cannot be installed
in eave type installation.
Figure 8
Figure 9
Back draft shutter system
Bell-mouth adaptor
Fit exi-duct over shutter assembly
Tape over anges
100mm pipe
to fan
Direction of
airow
To fan
IMPORANT
If shutter system
is mounted in the
horizontal position,
shutter shaft should
be vertical.
Part number: 150 MMBDSS
Back draft shutter system
Tape over anges
Air ow