P.O. Box 410
Schofield, WI  54476

Phone:  715.359.6171
www.greenheck.com

Product Specification Guide
Model VCD-2x, VCD-3x, VCD-42, SEVCD-23, SEVCD-33, and FBV-23 Control 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 Master Format 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.	This section contains control dampers suitable for application in HVAC systems. 

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.	IECC – International Energy Conservation Code

D.	ASHRAE Standard 62 – Ventilation for Acceptable Indoor Air Quality

1.4	SUBMITTALS

A.	Comply with requirements of Section 01330 – Submittal Procedures.

B.	Product Data: Submit manufacturer’s product data.
1.	Include leakage, velocity, pressure drop and maximum pressure data
2.	Indicate materials, construction, and dimensions.
3.	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).
4.	Include a copy of Installation Instructions.

1.5	QUALITY ASSURANCE

A.	Dampers shall bear the AMCA Certified Ratings Seal for Air Performance in accordance with AMCA 511 (VCD-20).

B.	Dampers shall bear the AMCA Certified Ratings Seal for Air Performance Air Leakage in accordance with AMCA 511 (VCD-23, VCD-33, VCD-34,
SEVCD-23 and SEVCD-33).

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	HVAC CONTROL DAMPERS

A.	Model: FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, VCD-42, SEVCD-23, and SEVCD-33

B.	Ratings:

1.	Leakage: FBV-23, VCD-23, VCD-33, VCD-34, VCD-42 and SEVCD-23
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•	Dampers shall have a maximum leakage of Class 1 @ 4 in. wg or Class 1A @ 1 in. wg as defined by AMCA (Leakage class 1 is defined as 8 cfm/ sq. ft. @ 4 in. wg and class 1A is defined as 3 cfm/ sq. ft. @ 1 in. wg. at -40°F). Tested in accordance with AMCA standard 500-D. (FBV-23, VCD-23, VCD-33, VCD-34, SEVCD-23, and SEVCD-33)

•	Dampers shall have a maximum leakage of 6 cfm/ sq. ft. @ 4 in. wg or 3 cfm/ sq. ft. @ 1 in. wg. (VCD-42)

•	Dampers shall meet or exceed the IECC (International Energy Conservation Code) requirements for damper leakage ratings of 3 cfm/ sq. ft. @ 1 in. wg or 8 cfm/sq. ft. @ 4in. wg or less when integral to the building envelope.

2.	Differential Pressure: 
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•	Dampers shall have a maximum differential pressure rating of 5 in. wg. (FBV-23, VCD-20, VCD-23, SEVCD-23)

•	Dampers shall have a maximum differential pressure rating of 6 in. wg. (VCD-42)

•	Dampers shall have a maximum differential pressure rating of 8 in. wg. (VCD-33, VCD-34, SEVCD-33)

3.	Velocity: 
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•	Dampers shall have a maximum velocity rating of 3000 fpm. 
(FBV-23, VCD-20, VCD-23, SEVCD-23)

•	Dampers shall have a maximum velocity rating of 4000 fpm.
(VCD-33, VCD-34, SEVCD-33)

•	Dampers shall have a maximum velocity rating of 6000 fpm.
(VCD-42)

C.	Performance:

1.	Pressure Drop
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Specifier Notes:  AMCA International's Certified Ratings Program (CRP) assures that a product line has been tested and rated in conformance with AMCA International's test standards and rating requirements. Their purpose is to give the buyer, specifier, and user of air movement and control equipment assurance that published ratings are reliable and accurate. When specifying dampers make sure the product is licensed to bear AMCA International's Certified Rating Seal for performance.
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•	The damper manufacturer's submittal data shall certify that all pressure drop data is licensed in accordance with the AMCA Certified Ratings Program for Test Figures 5.2, 5.3, and 5.5. Damper air performance data shall be developed in accordance with the latest edition of AMCA Standard 500-D. Dampers shall be labeled with the AMCA Air Performance Seal. AMCA certified pressure drop for a 24 in. wide x 24 in. high damper shall not exceed 0.04 in. wg when subjected to an airflow velocity of 1500 fpm according to AMCA Test Figure 5.3. (FBV-23, VCD-20, VCD-23, SEVCD-23)

•	The damper manufacturer's submittal data shall certify that all pressure drop data is licensed in accordance with the AMCA Certified Ratings Program for Test Figures 5.2, 5.3, and 5.5. Damper air performance data shall be developed in accordance with the latest edition of AMCA Standard 500-D. Dampers shall be labeled with the AMCA Air Performance Seal. AMCA certified pressure drop for a 24 in. wide x 24 in. high damper shall not exceed 0.03 in. wg when subjected to an airflow velocity of 1500 fpm according to AMCA Test Figure 5.3. (VCD-33, VCD-34, SEVCD-33)

•	The Damper manufacturer's submittal data shall certify that all pressure drop data is licensed in accordance with the AMCA Certified Ratings Program for Test Figures 5.2, 5.3, and 5.5. Damper air performance data shall be developed in accordance with the latest edition of AMCA Standard 500-D. Dampers shall be labeled with the AMCA Air Performance Seal. AMCA certified pressure drop for a 24 in. wide x 24 in. high damper shall not exceed 0.06 in. wg when subjected to an airflow velocity of 1500 fpm according to AMCA Test Figure 5.3. (VCD-42)

D.	Blade Action:
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Specifier Note: Parallel blade orientation is typically used when the damper operates in two positions, open or closed, whereas opposed blade configuration is typically used on dampers that modulate airflow.
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•	Blade action shall be opposed.
•	Blade action shall be parallel.

E.	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. Specifier, select one of the following:
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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. Stainless steel frame is optional. (FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, and VCD-42)

•	Damper frame shall be 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. (SEVCD-23 and SEVCD-33)

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, they lose symmetry resulting in highly variable operating torque requirements and the addition of larger blade stops at the top and bottom of the damper to maintain rated leakage performance. These factors culminate into a significant reduction of damper free area and an increase in pressure loss across the damper. Specifier, select one of the following:
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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. Blade orientation is horizontal. 304 stainless steel blade is optional. 
(FBV-23, VCD-20 and VCD-23)

•	Damper blades shall be 316SS 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. Blade orientation is horizontal. (SEVCD-23)

•	Damper blades shall be airfoil shape galvanized steel double skin construction (2 skins of 20 ga.) and 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. Blade orientation is horizontal. Stainless steel blade is optional. (VCD-33)

•	Damper blades shall be airfoil shape 316SS double skin construction (14 ga. equivalence) and 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. Blade orientation is horizontal. Stainless steel blade is optional. (SEVCD-33)

•	Damper blades shall be airfoil shape, galvanized steel double skin construction (14 ga. equivalence) filled with ½ in. polystyrene on 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. Blade orientation is horizontal. Stainless steel blade is optional. (VCD-34)

•	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. Blade orientation is horizontal. (VCD-42)

3.	Seals:

•	Blade Edge:  Shall be TPE comes standard which are mechanically fastened to each blade. Silicone blade seal is optional. 
(FBV-23, VCD-23, VCD-33, VCD-34, VCD-42, SEVCD-23, and SEVCD-33) 
No blade seal is optional on VCD-23.

•	Jamb: Flexible stainless steel compression type.

4.	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 which results in higher pressure loss across the damper.
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•	Dampers of whole inch height increments shall not require blade stops. When required, individual blade stops shall occupy no more than ½ in. of the damper opening to provide maximum free area and minimal pressure loss.

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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•	Linkage shall be plated steel. 
(FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, and VCD-42)

•	Linkage shall be stainless steel. 
(316SS standard for SEVCD-23, SEVCD-33).
316SS optional for FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, and VCD-42.

6.	Axles:  Minimum ½ in. dia.

•	Axles shall be plated steel. (FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, and VCD-42)

•	Axles shall be stainless steel. (316SS standard for SEVCD-23, SEVCD-33; 316SS optional for FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, and VCD-42)

7.	Bearings:  
************************************************************************************Specifier Notes: Extruded bearing holes in frame provide more axle-to-bearing surface area resulting in reduced bearing wear and longer damper life.
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•	Axle bearings shall be synthetic (acetal) sleeve rotating in polished extruded holes in the damper frame. (FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, and VCD-42)

•	Axle bearings shall be stainless steel sleeve rotating in polished extruded holes in the damper frame. (316SS standard for 
SEVCD-23, SEVCD-33; 316SS optional for FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, and VCD-42)

8.	Finish: Paint coatings are optional.
************************************************************************************Specifier Notes: Standard finish is mill galvanized. Consult Greenheck for assistance in specifying finishes for specific applications.
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•	Mill galvanized finish is standard. (FBV-23, VCD-20, VCD-23, VCD-33, VCD-34, and VCD-42)

•	316SS is standard. (SEVCD-23 and SEVCD-33)

2.3 ACCESSORIES

A.	Actuators:
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Specifier Notes:  Specify electric actuators. 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 selects the required actuator type and mounting location:
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1.	Type:
 
•	Electric, 24V AC, modulating
•	Electric, 24V DC, modulating
•	Electric, 24V AC, 2-position
•	Electric, 24V DC, 2-position
•	Electric, 120V AC, 2-position
•	Electric, 230V AC, 2-position
•	Electric, 380V AC, 2-position
•	Manual, hand quadrant
•	Manual, pull chain

2.	Mounting location: 

•	External (outside of duct)
•	External sideplate
•	Internal (inside of duct)

B.	OCI Switch
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Specifier Notes: OCI Switch indicates actual blade position, not actuator or control shaft position. It consists of two normally open switches. One switch makes contact when the damper is fully open and the other makes contact when the damper is fully closed.
****************************************************************************************Two Position indicator switch assembly directly linked to damper blade remotely indicate damper blade position.

C.	Flanged Frame
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Specifier Notes: Flanges are available as single (same side as actuator), single reverse (opposite side as actuator), or double (both sides).
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•	1½ in. rolled formed as part of frame.

D.	Sleeve
•	Damper supplied as a single assembly with a factory installed sleeve.

E.	Duct Transition
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Specifier Notes: For round duct connection, specify true round control damper Model VCDR-50, VCDR-53, VCDRM-50, or VCDRM-53.
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•	Duct transition connections available are round, oval, or rectangular.

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 aspect 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 for 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 230923.

END OF SECTION