3
Ceiling Exhaust and Inline Fans
Ceiling Radiation Damper (CRD)
If fan is to be used in a fire resistive membrane
ceiling, a ceiling radiation damper must be used.
If the ceiling radiation damper is already mounted to
the fan from the factory, proceed to Install the Fan.
Attachment Tabs
B-Models
To mount the ceiling radiation damper to fan, make sure
grille attachment tabs are facing down. Then place the inlet
part of the fan into the ceiling radiation damper collar, and
use self-tapping sheet metal screws (by others) to screw
through the damper collar and into the fan housing. If the
fan/light combination is being used, make sure ceiling
radiation damper has
an electrical plug in it.
The electrical plug must
be inserted into the fan.
Make sure the electrical
wire will not interfere with
damper operation as
shown in figure below.
Discharge Installation SP-A 50-90 Models
A-50-510, 710, 780 Models
Wires from lighted grille
Wires to ceiling fan
Do not allow
interference
in this area
A-700, 900-1550 Models
SP-A Box Slot
Plastic SP-A
Duct Adapter Tabs
Insert plastic duct tab into SP-A box slots.
Plastic SP-A
Duct Adapter (PN 473322)
Sheet Metal Screw #10x3/8
Phillips Head (PN 415838)
SP-A Box
Sheet Metal Screw #10x3/8
Phillips Head (PN 415838)
SP-A Box
Plastic SP-A
Duct Adapter (PN 473322)
Screw Tabs
Sheet Metal Screw #10x3/8
Phillips Head (PN 415838)
Screw holes
Rotate plastic SP-A duct adapter (PN 473322)
until the screw tabs meets SP-A box.
1
2
Install screws provided to secure discharge.
3
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