Greenheck Fan DFD-150X series User Manual
Installation instruction supplement, Fd & dfd series, Fsd series
 
These instructions apply to 11/2 hour rated combination fire smoke 
dampers and curtain fire dampers mounted horizontally in concrete 
floors. Specific requirements in these instruction 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) and UL Classification R13317.
Dampers up to a maximum size of 144 in. W x 96 in. H (3658mm x 2438mm) may be installed as illustrated 
below.
Fire damper and sleeve assemblies 144 in. W x 96 in. H (3658mm x 2438mm) and smaller only require 
retaining angles on top of the concrete floor. Retaining angles must be installed on top of the floor and attached to the sleeve 
and the floor.
Retaining angles must be attached to the sleeve.
• Retaining angles must be a minimum of 16 gauge (1.5mm) steel and have a minimum of 11/2 in. x 11/2 in.
(38mm x 38mm) legs.
• Retaining angles must be attached to the sleeve using one of the methods shown below:
•	 tack	or	spot	welds
•	 #10	sheet	metal	screws	or	1/4	in.	nuts	and	bolts
•Retaining angles must be attached to the concrete floor using the method shown below:
• Steel anchors or self tapping concrete screws penetrating concrete floor a minimum of 11/4 in. (32mm)
•	A	minimum	of	two	connections	per	side	with	a	maximum	spacing	of	6	in.	(152mm)	on	center
•	Retaining	angles	must	overlap	the	floor	a	minimum	of	1	in.	(25mm)
Copyright © 2008 Greenheck Fan Corporation
468236 Single Side Retaining Angle-Horizontal
Mount Rev.3 August 2008
A = Damper
B = Retaining Angle
C = Screws
Part number 468236
INSTALLATION INSTRUCTION SUPPLEMENT
Refer	to:
‘Installation Instructions for FD, DFD, SSFD, & KFD Models’
	(Part	#452763)	
or
‘Installation Instructions for FSD-XXX, DFD-XXX, SSFSD-XXX & 
CFSD-XXX Series Fire & Combination Fire Smoke Dampers’ (Part 
#461336)
or
‘Installation Instructions for FD & DFD 150X Series Curtain Fire 
Dampers’	(Part	#453946)	for	additional	details.	
Single Side Retaining Angle-Horizontal Mount
FD & DFD Series
1
1
/
2
Hour Fire Dampers
and
FSD Series
1
1
/
2
Hour Combination Fire Smoke
Dampers-Horizontal Mount
“UL CLASSIFIED
(see complete marking on product)”
“UL CLASSIFIED to Canadian safety standards
(see complete marking on product)”
Standards UL 555 & 555S
Classifications Filed at UL under Listing #R13317
CONCRETE
FLOOR
A
B
C
DAMPER
SLEEVE