Greenheck CRD-3XX and CRD-7XX Series for SP fans (452832) - Manual (Page 2)

Ceiling Exhaust Fan Support
The following two mounting methods may be used.
1) Suspend fan/damper assembly using #10 -32
threaded steel rod as shown in Figure 4. Suspend
from joists or cold rolled channels (do not suspend
from beams). If vibration isolators are used, fender
washers must have a larger outside diameter than
the holes in the fan mounting angle.
2) Support fan/damper assembly using (2) minimum 16
ga. x 1 1/2 in. steel channels with 9/16 in. flanges.
Suspend from joists or cold rolled channels (do not
suspend from beams). Alternatively, bolt channels
ends directly to joists or other cold rolled channels
using minimum #10 bolts. See Figure 5.
Do not support fan/damper assembly by ceiling tile
or ceiling grid (Tee) members when using with a
suspended ceiling!
Grille Installation
Mount grille to underside of ceiling radiation damper
using #10 x 1/2 in. Phillips head stainless steel sheet
metal screws provided with SP fan.
SP Fan
#10-32 Threaded
Steel Rod
Hanging Vibration
Isolation
Ceiling Radiation
Damper
Fire Rated Ceiling
3 in .
Grille
Hole Opening Is
“A” x “B”
#10 x ¾ in. SMS
6 in. Max. Centers,
2 Min./Side
Beam Steel
Joists
Steel Hanger Wires
(12 SWG minimum)
Concrete Floor
Figure 3
Unit Size “D” “E”
B50, B70,
B80, B90,
B110, B150,
B200 4 1/2 15 5/8
A50, A70,
A90, A110,
A125, A190 5 1/2 14 5/8
A250, A290,
A390, A200 6 3/4 15 1/2
A410, A510,
A710, A780 9 1/4 19 5/8
A900, A1050,
A1410, A1550 9 1/4 25 3/8
A700 5 1/2 25 1/8
“D”
“E”
Figure 4
#10 Bolt or #10-32
Threaded Steel Rod
Supports To Joists Or
Other Cold Formed
Channels (By Others)
1 1/2 in. x 9/16 in. x 16 Gauge
(Minimum) Cold Formed Steel
#10 x 3/8 in. SMS,
(Minimum) 4 Per Side
CRD-XXX
Series Damper
#10 Bolt or Sheet Metal Screw
(Minimum) Attached Through
Prepunched Holes In Mounting
Angles Into Channel Brace
Supports, 2 Per Side (By Others)
Figure 5
Copyright © 2012 Greenheck Corporation
452832 CRD-3xx, CRD-700 rev. 6 Sept 2012