P.O. Box 410
Schofield, WI  54476

Phone:  715.359.6171
www.greenheck.com

Product Specification Guide
Model SMD-200, 300 and 400 Series 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 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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1.	GENERAL

1.1	WORK INCLUDED

A.	This section contains smoke dampers with steel 3V, fabricated airfoil, or extruded aluminum blades meeting requirements of UL Standard 555S 4th 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.
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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.
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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 Smoke Damper (leakage)

D.	IBC – International Building Code

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

F.	NFPA 92 – Smoke Control Systems

G.	NFPA 101 – Life Safety Code

H.	NFPA 105 – Standard for the Installation of Smoke Door Assemblies and Other Opening Protectives

I.	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 leakage, velocity, differential pressure and elevated temperature.
2.	Indicate materials, construction, and dimensions.
3.	Verify conformance to NFPA, CSFM, 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 90A, 92, 101, and 105
2.	CSFM Leakage (Smoke) Damper Listing #3230-0981:104
3.	Applicable Building Codes

B.	Dampers shall be tested, rated, and labeled in accordance with 
1.	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.

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	SMOKE DAMPERS

A.	Model: SMD-200, 300, and 400 series smoke dampers
1.	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.  
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•	Dampers shall have a UL555S leakage rating of Leakage Class I.
•	Dampers shall have a UL555S leakage rating of Leakage Class II.
•	Dampers shall have a UL555S leakage rating of Leakage Class III.

2.	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.
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•	Dampers shall have a UL 555S elevated temperature rating of 250F (SMD-200, SMD-300, and SMD-400 series).
•	Dampers shall have a UL 555S elevated temperature rating of 350°F (SMD-200 series, SMD-300 series, SESMD-201, and SSSMD-201).

3.	Differential Pressure: 
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Specifier Notes: Pressure rating level of 4 in. or 6 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.  
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•	Dampers shall have a minimum UL 555S differential pressure rating of 4 in. wg (SMD-200 series, SMD-300 series, SMD-301V, and SMD-401M).
•	Dampers shall have a UL 555S differential pressure rating of 6 in. wg (SMD-200 series, SMD-300 series, SMD-401, SMD-401EF, SESMD-201, and SSSMD-201).
•	Dampers shall have a UL 555S differential pressure rating of 8 in. wg (SMD-300 series only).

4.	Velocity: 
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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. 
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•	Dampers shall have a minimum UL 555S velocity rating of 2000 fpm (SMD-200 series, SMD-401, SESMD-201, and SSSMD-201).
•	Dampers shall have a UL 555S velocity rating of 3000 fpm (SMD-300 series, SMD-401, SMD-401EF).
•	Dampers shall have a UL 555S velocity rating of 4000 fpm (SMD-300 series only).

B.	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 (SMD-200 series, SMD-300 series, SMD-401, and SMD-401M).

•	Damper frame shall be 16 ga. 304 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 (SSSMD-200 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 (SESMD-200 series).

•	Damper frame shall be aluminum 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 (SMD-401EF).

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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•	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 (SMD-200 series).

•	Damper blades shall be 16 ga. 304 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 (SSSMD-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 (SESMD-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 (SMD-300 series).

•	Damper blades shall be heavy gauge extruded aluminum airfoil shape with metal blade to blade overlap. 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 (SMD-400 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:
a.	Blade Edge:  Blade seals shall be extruded silicone rubber permanently bonded to the appropriate blade edges.
b.	Jamb: Flexible stainless steel compression type

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:  
•	Minimum ½ inch dia. plated steel (SMD-200 series, SMD-300 series, and SMD-400 series)
•	Minimum ½ inch dia. 316 stainless steel (SESMD-201 and SSSMD-201 standard, optional on SMD-300 series, SMD-301M, and SMD-401EF)

7.	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 316SS sleeve type rotating in polished extruded holes in the damper frame.

8.	Mounting:
•	Horizontal
•	Vertical

C.	Actuators:
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Specifier Notes:  Specify electric actuators (stall type actuators are not acceptable).  Specify external or internal mounting.  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).  External mounting is recommended for ease of accessing for inspection and to minimize blockage that will result in higher pressure drop across the damper.  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: 
•	External
•	Internal

D.	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 300 – 4000 fpm.
b. Photoelectric smoke detector for air velocities 100 – 4000 fpm.
c. No flow smoke detector is rated for air velocities 0 – 3000 fpm.

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

 3.    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  

2.3	SOURCE QUALITY CONTROL

A.	Factory Tests: Factory cycle damper and actuator assemblies to assure proper operation.

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 multiplier 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. 

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

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

END OF SECTION