®
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
Number
Description
1
Flooring Systems
2
Wood Truss
3
Air Ducts
4
CRD-1WT or CRD-2WT assembly
5
Mounting Angle
6
Resilient Channel
7
Gypsum Board
8
Grille (not supplied)
Finishing System
9
(not shown)
These instructions describe the installation of a
CRD-1WT or CRD-2WT in designs: L528, L546, L558,
L562, L574, L576, L581, L583, L585, L592, M501, M503,
M508, P533, P538, P545, P547, P548, P554, and P580
as detailed in the UL Fire Resistance Directory.
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).
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.
1
2
5
7
CRD-1WT and CRD-2WT
3
Table of Contents
General Information . . . . . . . . . . . . . . . . . . 2
Pre-Installation Guidelines
Installation - Hanger Method . . . . . . . . . . . . . 3
Installation - Base Mount Method . . . . . . . . . . . 5
Field Installation of Steel Plenums for CRD-1WT . . . 6
Fabrication of Fiberglass Ductboard Plenum for
CRD-1WT . . . . . . . . . . . . . . . . . . . . . . . 7
Document 474094
4
6
8
. . . . . . . . . . . . . . 3
CRD-1WT & CRD-2WT
1