P.O. Box 410
Schofield, WI 54476

Phone: 715.359.6171
www.greenheck.com

Product Specification Guide
Model DFD-200 and 300 Series Dynamic Fire Dampers
Facility Service Subgroup: Division 23 HVAC (Previously Division 15)

*************************************************************************************************************Note to User: This document is subject to copyright protection and is proprietary to Greenheck Fan Corporation. However, Greenheck Fan Corporation authorizes the user a limited non-exclusive license to use this document or portions of it for the purpose of preparing written product specifications for the above CSI MasterFormat category. All information in this document as provided by Greenheck Fan Corporation is informational in nature and is provided without representation or warranty of any kind as to the user or any other party, including, without limitation, ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE, OR NON-INFRINGEMENT. To the greatest extent permitted by applicable law, Greenheck Fan Corporation assumes no liability, and User assumes all liability and risk, for the use or results from the use of this document or the information contained herein, whether as modified by the user or not. Users should consult www.greenheck.com to verify that this document represents the most current version.

Specifier Notes: This product guide specification is written according to the Construction Specifications Institute (CSI) Format.

The section must be carefully reviewed and edited by the Engineer to meet the requirements of the project and local building code. Coordinate with other specification sections and the drawings.

Delete all "Specifier Notes" when editing this section.
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PART 1   GENERAL

1.1	WORK INCLUDED

A.	Dynamic fire dampers with steel 3-V blades meeting requirements of UL Standard 555 7th Edition. 

1.2	RELATED WORK
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Specifier Notes: Edit the following list as required for the project.  List other sections with work directly related to the dampers. ****************************************************************************************************
A.	Section 233300 Air Duct Accessories (Formerly 15810 – Ducts)
B.	Section 230913 – HVAC Instrumentation and Controls: Actuators and Operators; Control Dampers (Formerly 15900 – HVAC Instrumentation and Controls: Connections to actuator).

1.3	REFERENCES
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Specifier Notes: List standards referenced in this section, complete with designations and titles.  This article does not require compliance with standards, but is merely a listing of those used. ****************************************************************************************************

A.	AMCA 500-D – Laboratory Methods for Testing Dampers for Ratings
B.	AMCA 511 – Certified Ratings Program for Air Control Devices
C.	CSFM – California State Fire Marshall Listing for Fire Damper
D.	IBC – International Building Code
E.	NFPA 80 – Fire Doors & Other Opening Protectives
F.	NFPA 90A – Installation of Air Conditioning and Ventilating Systems
G.	NFPA 101 – Life Safety Code
H.	UL 555 (Seventh Edition) – Standard for Safety: Fire Dampers

1.4	SUBMITTALS
A.	Comply with requirements of Section 01330 – Submittal Procedures.
B.	Product Data: Submit manufacturer’s product data.
1.	Include UL ratings for fire resistance, velocity, differential pressure, size limitations and mounting orientation.
2.	Indicate materials, construction, and dimensions.
3.	Verify conformance to NFPA, CSFM, New York City MEA, IBC, UL, and applicable building codes as specified in Quality Assurance.
4.	Include pressure drop data for all damper sizes in accordance with AMCA 500-D test figures 5.2 (Ducted Inlet, Free Outlet), 5.3 (Ducted Inlet, Ducted Outlet) and 5.5 (Free Inlet, Free Outlet).
5.	Include a copy of UL Installation Instructions.

1.5	QUALITY ASSURANCE
A.	Dampers shall meet requirements for fire dampers in accordance with:
1.	NFPA 80, 90A and 101
2.	CSFM Fire (Dynamic) Damper Listing 
3.	Applicable Building Codes

B.	Dampers shall be tested, rated, and labeled in accordance with:
1.	UL 555 (Seventh Edition), Listing R13317

C.	Dampers shall bear the AMCA Certified Ratings Seal for Air Performance in accordance with AMCA 511.

1.6	DELIVERY, STORAGE, AND HANDLING
A.	Delivery: Deliver materials to site in manufacturer’s original, unopened containers and packaging, with labels clearly indicating manufacturer, material, and location of installation.

B.	Storage: Store materials in a dry area indoor, protected from damage, and in accordance with manufacturer’s instructions.

C.	Handling: Handle dampers using the frame or sleeve.  Do not lift or move dampers using blades, actuator or jackshaft.  Handle and lift dampers in accordance with manufacturer’s instructions.  Protect materials and finishes during handling and installation to prevent damage.

PART 2   PRODUCTS

2.1	MANUFACTURER

A.	Greenheck, PO Box 410, Schofield, Wisconsin 54476-0410.  Phone (715)359-6171.  Fax (715)355-6458.  Web Site www.greenheck.com.

2.2	DYNAMIC FIRE DAMPERS
A.	Model: DFD-200, DFD-300, and SEDFD-200 series dynamic fire dampers

B.	Ratings:
1.	Fire Resistance: 
********************************************************************************************Specifier Notes: UL 555 provides for classification of fire dampers with fire resistance ratings of either 1 ½ or 3 hours.  NFPA 90A requires that HVAC penetration through barriers with fire resistance ratings less than 3 hours be protected by 1 ½ hour rated dampers.  Penetrations through barriers with fire resistance ratings of 3 hours or more require 3 hour rated dampers.  NFPA 90A also require that all fire damper locations and their hourly rating requirements be shown on the project plans.  Specifier, select from the following:
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•	Dampers shall have a UL 555 fire resistance rating of 1½ hours. 
•	Dampers shall have a UL 555 fire resistance rating of 3 hours.

2.	Fire Closure Temperature: 
Each fire damper shall be equipped with a factory installed heat responsive device (fusible link) rated to close the damper when temperature at the damper reaches:
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Specifier Notes: NFPA 90A requires fire dampers to close by the action of a heat responsive device (usually a fusible link) when temperature at the damper reaches a certain temperature. The minimum temperature established by NFPA 90A is 165oF. Most damper manufacturers offer 165oF and 212oF. Some building codes may require 165oF, but if allowed by the applicable code, 212oF is the recommended choice. Be sure to verify availability of any temperature other than the following options.  Specifier, select one of the following options.  
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•	165oF
•	212oF
•	250oF
•	286oF
•	350oF

3.	Differential Pressure: 
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Specifier Notes: Pressure rating levels of 4, 6, 8, and 10 in. wg are allowed by UL Standard 555.  These rating levels are intended to insure that dynamic fire dampers will close against system pressure.  It is recommended that the lowest level consistent with the project’s HVAC system design be specified.  If a lower pressure rating level such as 4 in. wg is appropriate for all dampers except those installed in one or two specific systems in the project, it is recommended that the lower minimum levels be specified with higher appropriate minimum levels required only for the system or systems requiring the higher ratings.  Specifier, select from the following appropriate performance rating levels:
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•	Dampers shall have a minimum UL 555 differential pressure rating of 4 in. wg.
•	Dampers shall have a minimum UL 555 differential pressure rating of 6 in. wg.
•	Dampers shall have a minimum UL 555 differential pressure rating of 8 in. wg.
•	Dampers shall have a minimum UL 555 differential pressure rating of 10 in. wg.

4.	 Velocity: 
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Specifier Notes:  Airflow velocity rating levels of 2000, 3000, and 4000 fpm are allowed by UL Standard 555. These rating levels are intended to insure that dynamic fire dampers will close against system airflow.  It is recommended that the lowest level consistent with the project’s HVAC system design be specified.  If a lower velocity rating level such as 2000 fpm is appropriate for all dampers except those installed in one or two specific systems in the project, it is recommended that the lower minimum levels be specified with higher appropriate minimum levels required only for the system or systems requiring the higher ratings. Specifier, select from the following appropriate performance rating levels:
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•	Dampers shall have a minimum UL 555 velocity rating of 2000 fpm.
•	Dampers shall have a minimum UL 555 velocity rating of 3000 fpm.
•	Dampers shall have a minimum UL 555 velocity rating of 4000 fpm.
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C.	Dynamic Fire Damper (DFD) Construction:
1.	Frame: 
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Specifier Note: The following requirements for frame construction provide for specific corner reinforcement.  A major problem with dampers is light or flimsy construction resulting in damper operating problems because they are installed out of square or racked.  Corner reinforcement required by the following specification will significantly minimize these problems.  
To prevent excessive pressure loss across small dampers it is desirable to require a low profile frame to maximize the damper free area and minimize pressure loss.  The following requirements address this issue be requiring a low profile frame on dampers less than 17 in. high.
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•	Damper frame shall be galvanized steel formed into a 5 in. x 1 in. structural hat channel.  Top and bottom frame members on dampers less than 17 in. high shall be low profile design to maximize the free area of these smaller dampers.  Frame shall be 4-piece construction with 1 ½ in. (minimum) integral overlapping gusset reinforcements in each corner to assure square corners and provide maximum resistance to racking (DFD-200 and DFD-300 series).
•	Damper frame shall be 16 ga. 316 stainless steel formed into a 5 in. x 1 in. structural hat channel.  Top and bottom frame members on dampers less than 17 in. high shall be low profile design to maximize the free area of these smaller dampers.  Frame shall be 4-piece construction with 1 ½ in. (minimum) integral overlapping gusset reinforcements in each corner to assure square corners and provide maximum resistance to racking (SEDFD-200 series).
2.	Blades:
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Specifier Notes: The following requirements for blade construction incorporate a design concept known as VSB (Variable Symmetrical Blades). Many damper manufacturers utilize only one size of blade, which requires trimming one or more blades to accommodate varying damper heights.  When blades are trimmed one or more of the blades become non-symmetrical resulting in operating torque that will vary significantly depending on airflow direction through the damper.  Alternatively larger blade stops (top and bottom of damper) are required.  This reduces damper free area and results in higher pressure loss across the damper. 
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•	Blades: Damper blades shall be 16 ga. galvanized steel strengthened by three longitudinal 1 in. deep V-grooves running the entire length of each blade.  Each blade shall be symmetrical relative to its axle pivot point, presenting identical performance characteristics with air flowing in either direction through the damper.  Provide symmetrical blades of varying size as required to completely fill the damper opening (DFD-200 series).
•	Damper blades shall be 16 ga. 316 stainless steel strengthened by three longitudinal 1 in. deep V-grooves running the entire length of each blade.  Each blade shall be symmetrical relative to its axle pivot point, presenting identical performance characteristics with air flowing in either direction through the damper.  Provide symmetrical blades of varying size as required to completely fill the damper opening (SEDFD-200 series).
•	Damper blades shall be 16 ga. galvanized steel with full length structural reinforcement and a double skin airfoil shape. Each blade shall be symmetrical relative to its axle pivot point, presenting identical performance characteristics with air flowing in either direction through the damper. Provide symmetrical blades of varying size as required to completely fill the damper opening (DFD-300 series).

3.	Blade Stops:
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Specifier Notes: The following requirement for blade stop construction minimizes blade stop height.  Large blade stops reduce damper free area and results in higher pressure loss across the damper. 
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Each blade stop (at top and bottom of damper frame) shall occupy no more than ½ in. of the damper opening area to allow for maximum free area and to minimize pressure loss across the damper. 

4.	Seals:
Jamb seals shall be flexible stainless steel compression type.
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Specifier Notes:  Linkage concealed in the jamb of the damper reduces pressure drop across the damper and results in less maintenance than linkage exposed to airflow. 
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5.	Linkage: Concealed in jamb.

6.	Axles:  
•	Minimum ½ in. dia. plated steel. 
•	Minimum ½ in. dia. stainless steel (SEDFD-200 series only)

7.	Retaining Angles:  Damper shall be supplied with factory retaining angles sized to provide installation overlap in accordance with the manufacturer’s UL listing.

8.	Bearings:  
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Specifier Notes:  Extruded bearing holes provide more axle to bearing surface area.  As a result, bearings will last longer and add to the life of the damper. 
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Axle bearings shall be sintered bronze sleeve type rotating in polished extruded holes in the damper frame.

9.	Fire Closure Device:
•	Damper shall be supplied with fusible link.

10.	Mounting:
•	Horizontal
•	Vertical

11.	Finish:
•	Galvanized steel (DFD-200 and 300 series)
•	316 stainless steel (SEDFD-200 series)

D.	Actuators:
1.	Type:
•	Damper shall have a manual quadrant

2.	Mounting:
•	External
•	Internal

2.3	SOURCE QUALITY CONTROL
A.	Factory Tests: Factory cycle damper assemblies to assure proper operation.

PART 3   EXECUTION

3.1	EXAMINATION
A.	Examine areas to receive dampers.  Notify the Engineer of conditions that would adversely affect installation or subsequent utilization of dampers.  Do not proceed with installation until unsatisfactory conditions are corrected.

3.2	INSTALLATION
A.	Install dampers in accordance with manufacturer’s UL Installation Instructions, labeling, and NFPA 90A at locations indicated on the drawings.  Any damper installation that is not in accordance with the manufacturer’s UL Installation Instructions must be approved prior to installation. 

B.	Dampers must be accessible to allow inspection, adjustment, and replacement of components.  The sheet metal contractor shall furnish any access doors in ductwork or plenums required to provide this access.  The general contractor shall furnish any access doors required in walls, ceilings, or other general building construction.  

C.	Install dampers square and free from racking. 

D.	The installing contractor shall provide and install bracing for multiple section assemblies to support assembly weight and to hold against system pressure. 

E.	Do not compress or stretch the damper frame into the duct or opening.

F.	Attach multiple damper section assemblies together in accordance with manufacturer’s instructions.  Install support mullions as reinforcement between assemblies as required.

G.	Handle dampers using the frame or sleeve.  Do not lift or move dampers using blades, actuator or jackshaft.

END OF SECTION