Greenheck CRD-3XX, CRD-7XX User Manual
®
Document Number 452832
Installation Instructions CRD-3XXX, CRD-3XXL &
CRD-700 Series Dampers on Model SP Fans
Installation, Operation and Maintenance Instructions
These installation instructions show recommended
installation procedures. These or other installation
methods may be followed subject to the approval of
the authority having jurisdiction.
Model CRD-310, 320, 350, 360, 310L, 320L and
700 are specific sizes of Greenheck Model DFD350 dampers equipped with hardware to facilitate
installation with Greenheck Model SP ceiling exhaust
fans. The
CRD-3XX series and CRD-700 dampers are classified
by UL to function as a heat barrier in air handling
penetrations through fire resistive membrane ceilings.
They are intended to maintain the fire resistive
integrity of the ceiling. They can only be installed
in conjunction with the SP fan models shown and
cannot be installed alone.
Note: Motors for fan models used in conjunction
with CRD shall be equipped with thermal cut-off
fuse control.
SP Fan Size CRD Model
SP-B50, SP-B70, SP-B80,
SP-B90, SP-B110,
SP-B150, SP-B200
SP-A50, SP-A70, SP-A90,
SP-A110, SP-A125,
SP-A190
SP-A250, SP-A290,
SP-A390, SP-A200
SP-A410, SP-A510,
SP-A710, SP-A780
SP-A900, SP-A1050 CRD-360
SP-A1550, SP-A700 CRD-700
CRD-320
CRD-320L
CRD-310
CRD-310L
CRD-320
CRD-350
UL CLASSIFIED (see complete marking on
product)
UL CLASSIFIED to Canadian safety standards (see
complete marking on product)
Standard UL555C
Classifications filed at UL under Listing #R13446
3.69”
Figure 1: Isometric view of a CRD-3XX series damper.
Wires to ceiling fan
Damper Installation to a SP fan model
Fan housing fits inside top flange of damper frame.
Observe label on damper indicating top.
Attach damper to fan housing using #10 x 3/4 in.
sheet metal screws on 6 in. maximum centers,
minimum two fasteners per side. See Figure 3.
®
Do not allow
interference in
this area
Figure 2: Isometric view for wiring the CRD-3XX series
damper to the lighted grille and ceiling fan.
Concrete Floor
#10 x ¾ in. SMS
6 in. Max. Centers,
2 Min./Side
3 in .
Hole Opening Is
“A” x “B”
Grille
Figure 3
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!
#10 x 3/8 in. SMS,
1 1/2 in. x 9/16 in. x 16 Gauge
(Minimum) Cold Formed Steel
#10 Bolt or #10-32
Threaded Steel Rod
Supports To Joists Or
Other Cold Formed
Channels (By Others)
CRD-XXX
Series Damper
(Minimum) 4 Per Side
Figure 5
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
#10 Bolt or Sheet Metal Screw
(Minimum) Attached Through
Prepunched Holes In Mounting
Angles Into Channel Brace
Supports, 2 Per Side (By Others)
Beam
Steel
Joists
Steel Hanger Wires
(12 SWG minimum)
“D”
“E”
Figure 4
Unit Size “D” “E”
B50, B70,
4 1/2 15 5/8
B80, B90,
B110, B150,
B200
A50, A70,
5 1/2 14 5/8
A90, A110,
A125, A190
A250, A290,
6 3/4 15 1/2
A390, A200
A410, A510,
9 1/4 19 5/8
A710, A780
A900, A1050,
9 1/4 25 3/8
A1410, A1550
A700 5 1/2 25 1/8
Copyright © 2012 Greenheck Corporation
452832 CRD-3xx, CRD-700 rev. 6 Sept 2012
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