Greenheck CRD-1WT Manual

Document Number 474094
CRD-1WT
Ceiling Radiation Damper for
Wood Truss Application
Installation, Operation and Maintenance Instructions
CRD-1WT Dampers are intended for installation in
accordance with ceiling radiation damper requirements
established by:
National Fire Protection Association
NFPA Standards 80, 90A, 92A, 92B, 101, & 105
IBC International Building Codes
“UL CLASSIFIED (see complete marking on
product)”
UL Standard 555C (Classification #R13446)
Safety Warning:
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, injury or
death. Read the installation, operating, and maintenance
instructions thoroughly before installing or servicing this
equipment.
Receiving and Handling
Upon receiving dampers, check for both obvious and
hidden damage. If damage is found, record all necessary
information on the bill of lading and file a claim with
the final carrier. Check to be sure that all parts of the
shipment, including accessories, are accounted for.
Dampers must be kept dry and clean. Indoor storage
and protection from dirt, dust and the weather is highly
recommended. Do not store at temperatures in excess of
100°F (38°C).
Due to continuing research, Greenheck reserves the right to change specifications without notice.
This manual is the property of the owner, and is required for future maintenance. Please leave it with the owner when the
job is complete.
These instructions describe the installation of a CRD-1WT in designs: M508 and P554 as detailed in the UL Fire
Resistance Directory.
Number Description
1 Flooring Systems
2 Wood Truss
3 Air Ducts
4 CRD-1WT assembly
5 Mounting Angle
6 Resilient Channel
7 Gypsum Board
8 Grille (not supplied)
9 Finishing System
(not shown)
1
2
7
3
4
5
8
6
Figure 1
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1) CRD’s are shipped from the factory with the blades in
the closed position. The fusible link must be installed
at the time of installation such that the blades are
held open as shown in Figure 2.
2) Fasteners (screws, bolts, rivet, etc.) used for
installation must not interfere with blade operation.
3) Flexible duct must be Class I or 0 type, bearing the
UL listed mark. Steel duct must be a minimum 28 ga.
(.5mm) and maximum 20 ga. (1mm).
4) Ceiling damper must be installed as described in
these installations.
5) Ceiling penetration shall be located between floor/
ceiling trusses.
6) Dampers supplied without a factory supplied plenum
box require a steel or ductboard plenum to be field
installed (see pages 4 and 5).
7) Dampers shipped with factory attached plenums
MUST be installed prior to sheetrock ceiling
installation.
Installation
1) The damper assembly is to be attached to the
trusses using 2 - 1 in. x 1 in. x 16 ga. (25mm x 25mm
x 1.5mm) or 2 - 1 1/4 in. x 1 in. x 20 ga. (32mm
x 25mm x 1mm) mounting angles. See Figure 3
for alternate mounting angle detail. Attach each
mounting angles to the damper with a minimum of 2 -
#8 screws or 5/32 in. (4mm) diameter steel rivets.
Note: Make sure the fasteners do not interfere with
the damper operation.
2) Install the damper assembly, with attached mounting
angles, between the trusses as shown in Figures 4 -
7and attach mounting angles to the trusses using 4
- 1¼ in. long steel screws per mounting angle.
3) For grille mount installations, the grille/diffuser frame
shall be steel. The grille/diffuser shall be attached
with a minimum of 4 - 1 in. (25mm) long #6 screws
run through the gypsum wall board into the plaster
flange (Figure 4 and 5).
4) For duct mount installations, 1 in. x 1 in. x 24 ga.
(25mm x 25mm x 0.7mm) retaining angles shall be
installed on all four sides and shall be attached with a
minimum 4 - 1 in. (25mm) long #6 screws run through
the gypsum wallboard into the plaster flange (Figure
6 and 7).
Installation Guidelines
Figure 2
1/2 in.
minimum
3 in.
3 in.
1 in.
Figure 3 - Alternate Mounting Angle
(provided by others)
1. Damper
2. Mounting Angle
3. Plaster Flange
4. Gypsum Board
5. Grille
6. RC Channel
7. Steel Plenum
Figure 4: Grille Mount with Steel Plenum
Note: For grille mount installations, the damper blades shall be
maximum 3 1/4 in. (83mm) above the top of the ceiling plane. For
duct mount installations, the damper blades shall be maximum 1/8 in.
(6mm) above the top of the ceiling plane.
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1. Damper
2. Mounting Angle
3. Plaster Flange
4. Gypsum Board
5. Grille
6. RC Channel
7. Duct Board Plenum
Figure 5: Grille Mount with Duct Board Plenum
1. Damper
2. Mounting Angle
3. Plaster Flange
4. Gypsum Board
5. Duct
6. Duct Retaining Angle
7. RC Channel
8. Steel Plenum
Figure 6: Duct Mount with Steel Plenum
1. Damper
2. Mounting Angle
3. Plaster Flange
4. Gypsum Board
5. Duct
6. Duct Retaining Angle
7. RC Channel
8. Duct Board Plenum
Note: Trim duct board to install mounting
angle. It is not necessary to re-install
trimmed piece to maintain UL certification.
8
8
Figure 7: Duct Mount with Duct Board Plenum
Field Installation of Steel Plenums
1. The steel plenum box shall be a minimum of 28 ga.
(0.47mm) of galvanized steel.
2. The inside width x length dimensions of the steel
plenum shall be sized no greater than 1/8 in. (3mm)
larger than the damper frame. The maximum ple-
num height shall be 14 in. (356mm) as illustrated
below. The plenum should be sized to provide a
snug fit over the damper frame.
3. The plenum duct collars shall be a minimum of
30 ga. (.39mm) galvanized steel. The total area of
the plenum box duct collars shall not exceed 78.5
sq. in. (1994 sq. mm) with a maximum of two duct
collars per plenum. Duct collars shall be securely
fastened to the plenum surface. Any segment of
the duct collar that protrudes inside the plenum
wall must not interfere with the damper blade
operation.
4. The steel plenum box is to be attached to the
damper using a #8 screws, 1/8 in. (3mm) rivets,
spot welds or tack welds. Minimum of two per side
(Figure 8).
5. The attachment of the screws or rivets must not
interfere with damper operation.
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1. Fiberglass ductboard shall be a minmum of 1 inch
(25mm) thick UL181 Listed and have a minmum
R-value 4.3 .
2. The inside width x length dimensions on the duct
board plenum shall be sized no greater than
1/8 in. (3mm) larger than the damper frame. The
maximum plenum height shall be 15 in. (381mm)
as illustrated below. The plenum should be sized
to provide a snug fit over the damper frame.
3. Edge and corner preparation shall be accordance
with details shown (Figures 9 and 10). Plenum
top shall be fabricated and attached using similar
method, S-AF and SF-AF (Figures 9 and 10).
4. Corner sealing tape shall be UL 181 Listed and
minimum of 2 in. ( 51mm) wide.
AF - Square Cut
with Flap
AF - Square Cut
S - Female Shiplap SF - Female Shiplap with
End Flap
VC - V-groove
Corner Fold
SC - Shiplap
Corner Fold
Fabrication of Fiberglass Ductboard Plenum for CRD-1WT
Figure 9
Damper and Steel Plenum
Assembly
CRD-1WT Grille Mount
Damper and Steel Plenum
Assembly
CRD-1WT Duct Mount
Plaster
Flange
Plaster
Flange
Damper
Frame
Damper
Frame
3.5 in.
14 in.
maximum
14 in.
maximum
Figure 8
Field Installation of Steel Plenums cont........
5. The plenum duct collars shall be minimum of 30
ga. (.39mm) galvanized steel. The total area of the
plenum box duct collars shall not exceed 78.5 sq.
in. (1994 sq. mm) with a maximum of two duct
collars per plenum. Duct collars shall be securely
fastened to the plenum duct board. Any segment
of the duct collar that protrudes inside the plenum
must not interfere with the damper blade operation.
6. Plenum shall be attached to ceiling damper sub-
frame using UL 181 Listed tape (Figure 11).
7. Refer to Figure 4- 7 for ceiling damper installation.
The CRD-1WT ceiling radiation damper is classified
for use in specific wood truss ceiling assemblies.
See UL Fire Resistance Directory for floor/ceiling
design number M508 and roof/ceiling design
number P554.
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S - AF
S - AF S - AF
S - AF S - AF S - AF
S - AF
S - AF S - AF
SC
SC SC SCSCSC
SC
1 Piece Duct 2 Piece “U” Duct 2 Piece “L” Duct 4 Piece Duct
Plenum Top
Damper Maintenance
Dampers do not typically require maintenance as long as they are kept dry and clean. If cleaning is necessary, use
mild detergents or solvents. If lubrication is desired for components such as axle bearings, do not use oil-based
lubricants or any other lubricants that attract contaminants such as dust.
Dampers and their actuator(s) must be maintained, cycled, and tested a minimum in accordance with:
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Figure 10
Figure 11
Damper and Duct Board Plenum
Assembly
CRD-1WT Grille Mount
Damper and Duct Board Plenum
Assembly
CRD-1WT Duct Mount
Plaster
Flange
Plaster
Flange
15 in.
maximum
15 in.
maximum
Damper
Frame
Damper
Frame
3.5 in.
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As a result of our commitment to continuous improvement, Greenheck reserves the right to
change specifications without notice.
Specific Greenheck product warrantees can be located on greenheck.com within the prod-
uct area tabs and listed in the Library under Warrantees.
®
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