P.O. Box 410
Schofield, WI  54476

Phone:  715.359.6171
www.greenheck.com

Product Specification Guide
Model DFDR-500 AND SSDFDR-500 Series Round Dynamic Dampers
Facility Service Subgroup: Division 23 HVAC (Previously Division 15)

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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.	True Round Fire Dampers 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 and Other Opening  Protectives

F.	NFPA 90A – Installation of Air Conditioning and Ventilating Systems.

G.	NFPA 101 – Life Safety Code.

I.  	UL 555 Standard for Safety: Fire Dampers

1.4	SUBMITTALS

A.	Comply with requirements of Section 23330 – Submittal Procedures.

B.	Product Data: Submit manufacturer’s product data.
1.	Include UL ratings for leakage, velocity, differential pressure and elevated temperature.
2.	Indicate materials, construction, and dimensions.
3.	Verify conformance to NFPA, CSFM, New York City MEA, IBC, UL, and applicable building code 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 smoke dampers in accordance with:
1.	NFPA 80, 90A, and 101
2.	CSFM Fire Damper Listing
3.	Applicable Building Codes

B.	Dampers shall be tested, rated, and labeled in accordance with 
1.	UL 555, Listing R13317

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 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	ROUND FIRE DAMPERS

A.	Model: DFDR-500 and SSDFDR-500 series true round dynamic rated fire dampers
B.	Ratings:

1.	Fire Resistance: 
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Specifier Notes: UL 555 provides for classification of combination fire smoke dampers with fire resistance ratings of either 1 ½ or 3 hours.  NFPA 90A requires that HVAC penetrations 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 requires that all combination fire smoke 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. 

2.	Fire Closure Temperature: 
Each combination fire smoke damper shall be equipped with a factory installed heat responsive device rated to close the damper when the temperature at the damper reaches:
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Specifier Notes: Combination fire smoke dampers qualified under UL 555 are required to be equipped with a heat responsive device to close the damper when temperature at the damper reaches some specific maximum.  Heat responsive devices (usually limit controls or fusible links) rated to close combination fire smoke dampers at 165F, 212F, 250F, 286F, and 350F are available.  It is usually not desirable for combination fire smoke dampers to close (as fire dampers) when temperatures reach 165F or 212F because dampers typically are expected to remain functional for smoke control to temperatures up to 250F or 350F.  Selection of a single temperature device to close the combination fire smoke damper at 350F is normally recommended.  Specifier, select one of the following options:
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•	165F
•	212F
•	286F

3.	Leakage: 
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Specifier Notes: Leakage Class ratings of I, II, & III are allowed by UL Standard 555S.  Most codes require a minimum of Leakage Class II.  The lowest leakage rating (Leakage Class I) is recommended as it provides a higher level of safety at little if any increase in cost. Specifier, select one of the following options:
************************************************************************************Dampers shall have a UL555S leakage rating of Leakage Class I.
•	Dampers shall have a UL555S leakage rating of Leakage Class II.

4.	Differential Pressure: 
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Specifier Notes: Pressure rating levels of 4-in. wg are allowed by UL Standard 555S.  It is recommended that the lowest level consistent with the project’s HVAC system design be specified. ************************************************************************************
•	Dampers shall have a minimum UL 555S differential pressure rating of 4 in. wg.
						
5.   Velocity: 
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Specifier Notes:  Airflow velocity rating levels of 2000, 3000, and 4000 fpm are allowed by UL Standard 555S. It is recommended that the lowest level consistent with the project’s HVAC system design be specified. Specifier, select one of the following options:
************************************************************************************Dampers shall have a UL 555S velocity rating of 2000 fpm.

B.	Construction:
1.	Frame and Sleeve: 
•	The damper frame and sleeve shall be of one piece design, made with 20 ga. galvanized steel and a groove for added strength (DFDR-500 series).
•	The damper frame and sleeve shall be of one piece design, made with 20 ga. 304 stainless steel and a groove for added strength (SSDFDR-500 series).

2.	Blades: 
•	Double skin, minimum 14 ga. equivalent thickness, galvanized steel
(DFDR-500 series)
•	Double skin, minimum 14 ga. equivalent thickness, 304 stainless steel (SSDFDR -500 series)

3.	Axles: 
•	Minimum ½ inch dia. plated steel

4.	Bearings: 
•	Axle bearings shall be bronze sleeve type (DFDR-500 series)
•	Axle bearings shall be 304 stainless steel sleeve type (SSDFDR-500 series)

5.	Fire Closure Device:
•	Dampers shall be supplied with fusible link

6.	Mounting:
•	Vertical
•	Horizontal

7.	Retaining Plates
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Specifier Notes:  Single Retainer plate is required on either side of the wall/floor installation. Second retaining plate can be used but, not required. Specifier, select one of the following
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•	Single 
•	Two

8.	Finish
•	Galvanized steel (DFDR-500 series)
•	304 stainless steel (SSDFDR-500 series)

2.3	SOURCE QUALITY CONTROL

A.	Factory Tests: Factory cycle damper and actuator 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.  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 round and free from racking. 

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

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

F.	Install connections to [electric, pneumatic] actuators as specified in section 230913.

END OF SECTION