P.O. Box 410
Schofield, WI 54476

Phone: 715.359.6171
www.greenheck.com
Product Specification Guide
Model OFSD-2xx, OFSD-3xx, and GFSD-2xx Series Out of Wall Combination Fire Smoke 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 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.	Out of wall combination fire smoke dampers with steel 3V or fabricated airfoil blades meeting requirements of UL Standard 555 7th Edition and UL Standard 555S 4th Edition. 

1.2	RELATED WORK
********************************************************************************************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
********************************************************************************************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 and Smoke Damper (leakage)

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 92A – Smoke Control Systems

H.	NFPA 101 – Life Safety Code

I.	NFPA 105 – Standard for the Installation of Smoke Door Assemblies

J.	UL 555 (Seventh Edition)– Standard for Safety: Fire Dampers

K.	UL 555S (Fourth Edition) – Standard for safety: Leakage Rated Dampers for Use in Smoke Control Systems

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, 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 combination fire smoke dampers in accordance with:
1.	NFPA 80, 90A, 92, 101, and 105
2.	CSFM Fire Damper Listing
3.	CSFM Leakage (Smoke) Damper Listing
4.	New York City MEA Listing 260-91-M Vol. III
5.	Applicable Building Codes

B.	Dampers shall be tested, rated, and labeled in accordance with:
1.	UL 555 (Seventh Edition), Listing R13317
2.	UL 555S (Fourth 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 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	OUT OF WALL COMBINATION FIRE SMOKE DAMPERS
A.	Model: OFSD-200, OFSD-300, and GFSD-200 series out of wall combination fire smoke dampers

B.	Ratings:
1.	Fire Resistance: 
************************************************************************************Specifier Notes: UL 555 provides for classification of combination fire smoke dampers with fire resistance rating of 1 ½ hours. NFPA 90A also requires that all combination fire smoke damper locations and their hourly rating requirements be shown on the project plans. ************************************************************************************
•	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
•	250F
•	286F
•	350F

3.	Elevated Operational Temperature:
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Specifier Notes: Elevated temperature ratings of 250F and 350F are allowed by UL Standard 555S. The highest temperature rating (350F) 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 UL 555S elevated temperature rating of 250F.
•	Dampers shall have a UL 555S elevated temperature rating of 350F.

4.	Leakage: 
************************************************************************************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.

5.	Differential Pressure: 
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Specifier Notes: Pressure rating level of 4 in., 6 in., or 8 in. wg is 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 differential pressure rating of 4 in. wg.
•	Dampers shall have a UL 555S differential pressure rating of 6 in. wg (OFSD-2xx and OFSD-3xx series only). 
•	Dampers shall have a UL 555S differential pressure rating of 8 in. wg (OFSD-3xx series only).

6.	Velocity: 
************************************************************************************Specifier Notes: Airflow velocity rating level of 2000 fpm is 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 velocity rating of 2000 fpm.
•	Dampers shall have a minimum UL 555S velocity rating of 3000 fpm (OFSD-3xx series).
•	Dampers shall have a minimum UL 555S velocity rating of 4000 fpm (OFSD-3xx series).

C.	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 16 ga. 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.

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: OFSD-2xx and GFSD-2xx series - 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. 

OFSD-3xx 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.

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:
a.	Blade Edge: Blade seals shall be extruded silicone rubber permanently bonded to the appropriate blade edges.
b.	Jamb: 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 on-blade-linkage. 
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5.	Linkage:
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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 on-blade-linkage. 
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•	Concealed in jamb

6.	Axles:
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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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•	Minimum ½ in. dia. plated steel

7.	Bearings: Axle bearings shall be sintered bronze sleeve type rotating in polished extruded holes in the damper frame.

8.	Sleeve: Galvanized steel wrapped with a thermal blanket

9.	Fire Closure Device:
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Specifier Notes: The fire closure device is linked to the actuator to move the damper to its open or closed position in response to signals from the building control system, fire alarm system, smoke alarm system, or the electric heat responsive sensing device on the damper itself. Combination fire smoke dampers are equipped standard with a RRL (Reusable Resettable Link), an electric heat-responsive device that performs the same function as a fusible link. An RRL can be reset, eliminating the need to replace a fusible link each time. Fire Closure Device options available are: 

Fusible link - melts when the temperature is reached and closes the damper, RRL/OCI (Reusable Resettable Link with Open & Closed Indicator) -performs the function of RRL with an OCI that is linked to a damper blade to indicate whether the damper blade is open or close when used in conjunction with remote indicator lights.
The TOR (Temperature Limited Override) - incorporates two electric sensing devices (thermostats) with fixed settings (usually 165°F and 350°F) and eliminates the fusible link entirely. The primary sensor (165°F setting standard; 212°F optional) can be bypassed by an external electrical signal allowing the damper to reopen and remain open until the temperature reaches the setting of the secondary sensor (usually 350°F depending on the actuator). When the temperature of the secondary sensor is exceeded, the damper closes and remains closed thereafter.is used in engineered smoke control system. The TOR has two temperatures for closing. The lower temperature (usually 165°F) closes the damper and by using the OVERRIDE option to re-open the damper to close at higher temperature (250°F or 350°F) to allow smoke control system operation.
Specifier, select one of the following options:
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•	Dampers shall be supplied with RRL.
•	Dampers shall be supplied with fusible link.
•	Dampers shall be supplied with RRL/OCI.
•	Dampers shall be supplied with TOR.

10.	Mounting
•	Horizontal
•	Vertical

11.	Finish
•	Galvanized Steel
D.	Actuators:
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Specifier Notes: Specify electric or pneumatic actuators (stall type actuators not acceptable). Electric actuators and components are to be factory grounded to single point junction box in accordance with Part 1 of the Canadian Electrical Code, section 12-1xxx (Rigid and Flexible Metal Conduit Rules).  Specifier, select the required actuator type and mounting location:
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1.	Type: 
•	Electric, 120V AC, 2-position
•	Electric, 24V AC, 2-position
•	Electric, 230V AC, 2-position

2.	Mounting: 
•	Internal

E.	Accessories:
1.	Test Switches
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Specifier Notes: Test switches provide an easy way to perform testing and maintenance on combination fire smoke dampers. Specifier, select one of the following options:
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•	Greenheck Test Switches (GTS) – Test and cycle the damper remotely. 
•	Momentary Test Switch: Test and cycle the damper on location.

2. 	Smoke Detector
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Specifier Notes: Greenheck offers photoelectric or no flow smoke detectors.  Smoke detector addressability is specific to smoke alarm system type. Consult factory for addressability. Specifier, select one of the following options:
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•	Model:
a. Photoelectric smoke detector for air velocities 100 – 4000 fpm
b. No flow smoke detector is rated for air velocities 0 – 3000 fpm

•	Mounting:
a. Factory mounted
b. Shipped loose for field installation

3.	Retaining Angles
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Specifier Notes: Greenheck’s POC retaining angles are four pieces riveted in three corners to form one piece. Specifier, select one of the following options:
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•	1 ½ x 1 ¼ inches
•	2 ½ x 1 ½ inches

4. 	Breakaway Connections
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Specifier Notes: Breakaway connections are required on all combination fire smoke damper installations.   
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•	Quick Connect: Universal breakaway connection that is compatible with TDC, TDF, Ductmate, Nexus or Ward flange systems.

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

G.	Install connections to actuators as specified in section 230913.

END OF SECTION