Installation - Greenheck FD150X Installation, Operation And Maintenance Manual

Installation -

Failure to follow these instructions will void all warranties.
These instructions apply to 1
Specific requirements in these instructions are mandatory. These instructions meet the requirements of UL 555.
Installation shall comply with the requirements of NFPA 90A Standard for the Installation of Air Conditioning and
Ventilating Systems. U.L. listing R13317, California State Fire Marshal listings 3225-981:102, and New York City
BSA/MEA listing 260-91-M as they apply to these dampers.
1. NO ADDITIONAL SLEEVES ARE REQUIRED
The fire damper extended frame is an approved sleeve and can be properly installed without the need for a
supplemental field installed sleeve. Damper frame shall extend a maximum of 6 in. beyond the wall or floor
opening on each side.
2. CLEARANCES REQUIRED BETWEEN FIRE DAMPER SLEEVES AND WALL/FLOOR OPENINGS
Fire damper assemblies expand during periods of intense heat. Therefore, it is essential that openings in walls
or floors be larger than the fire damper assembly to allow for this expansion. Minimum clearances required
between the outside of fire damper sleeve assemblies and wall/floor openings are:
• Galvanized steel fire dampers and sleeves: 1/8 in. per linear foot of damper width and height with a minimum
clearance of 1/4 in. Recommended clearances, for width and/or height dimensions of:
1) 48 in. or less: 1/2 in. clearance
2) More than 48 in. and 96 in. or less: 1 in. clearance
3) More than 96 in.: 1
These are total clearances (ignoring fastener heads) and do not need to be equally spaced around the
damper. Refer to Section 3 and Figure 2 for additional installation considerations.
Example: A 12 in. x 12 in. damper would require a minimum clearance of 1/4 in.
A 48 in. x 12 in. damper would require a minimum clearance of 1/2 in. on width and 1/4 in. on height.
3. SECURING THE FIRE DAMPER TO WALL AND
FLOOR OPENINGS
Fire damper assemblies must be installed in wall and
floor openings using retaining angles on each side of the
wall or floor as described below:
• Retaining angles must be a minimum of 16 gauge
steel and have a minimum of 1
• Retaining angles must be attached to the damper
using one or more of the following methods of
attachment:
• tack or spot welds
• #10 sheetmetal screws
• 1/4 in. bolts and nuts
• 3/16 in. steel pop rivets
Attachments must be spaced a maximum of 6 in. on
center and a maximum of 2 in. from corners. The angles
must be attached to all 4 sides of the sleeve with butt
joints at each corner. A minimum of two attachments
are required on each side, top and bottom. The angles
need not be attached to each other at the corners.
• Retaining angles must completely cover the
clearance space between the damper and the
wall/floor opening, plus overlap the wall/floor a
minimum of 1 in. This coverage includes all corners
(see Figure 2).
• Retaining angles should not be fastened to the
wall/floor material. The angles should only sandwich
the wall/floor and allow for damper expansion during
periods of intense heat.
1 ⁄ hour rated fire dampers mounted in masonry, block or stud walls and concrete floors.
2
1
/ in. clearance
2
1 1
⁄ in. x 1 ⁄ in. legs.
2 2
Retaining
Angle
*only applicable for damper sizes above 36 in. x 36 in.
Figure 2: Retaining angle installation.
Wall or
Floor
Retaining
Angle
Sleeve
Duct
Damper
3