P.O. Box 410
Schofield, WI 54476

Phone: 715.359.6171
www.greenheck.com

Product Specification Guide
Model AMD-23, AMD-33, and AMD-42 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 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.	Air measuring station with a control damper that measures and regulates airflow. Air measuring station with a control damper is 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

E.	California Title 24 - California's Energy Efficiency Standards for Residential & Non-residential Buildings 

1.4	SUBMITTALS

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

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

1.5	QUALITY ASSURANCE

A.	Product is subject to set periodic testing to assure performance is maintained.

B.	Dampers shall bear the AMCA certified ratings seal for air performance and air leakage 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	Air Measuring Control Damper

A.	Model: AMD-23, AMD-33, and AMD-42

B.	Ratings
1.	Leakage: 
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•	Dampers shall have a maximum leakage of 6 cfm/ sq. ft. @ 4 in. wg or 3 cfm/ sq. ft. @ 1 in. wg.
•	Damper shall meet or exceed the IECC (International Energy Conservation Code) requirements for damper leakage ratings of 3 cfm per sq. ft. @ 1 in. wg or 8 cfm per sq. ft @ 4 in. wg or less when integral to the building envelope.

2.	Velocity: 
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•	Dampers shall have a maximum velocity rating of 2000 fpm (AMD-23).
•	Dampers shall have a maximum velocity rating of 3000 fpm (AMD-33 & AMD-42).

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. 
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•	Damper frame shall be galvanized steel formed into a 5" x 1" structural hat channel with a 16 ga. thickness. 12 ga. frame thickness is available as an option.

2.	Blades:
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Specifier Notes: The AMD series utilizes air pressure pickups for more accurate pressure readings. Select one of the following:
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•	Damper blades shall be16 ga. galvanized steel strengthened by three longitudinal 1 in. deep Vee 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, and operation is parallel. (AMD-23)

•	Damper blades shall be airfoil shape galvanized steel double skin construction (14 ga. equivalent). 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, and operation is parallel. (AMD-33)

•	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, and operation is parallel. (AMD-42)

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” of the damper opening area to allow for maximum free area and to minimize pressure loss across the damper. 

4.	Seals: 
a.	Blade Edge: TPE blade seals come standard which are mechanically fastened to each blade. Silicone blade seals are available as an option.
b.	Jamb: Stainless steel

5.	Linkage: Concealed in frame out of the airstream, plated steel material, Stainless steel is available as an option.	
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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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6.	Axles: Minimum ½ inch dia. plated steel. Stainless steel axle is optional. Removable control shaft extends 6" beyond the damper frame.

7.	Bearings: Synthetic bearings are provided standard. Stainless steel bearings are available as an option.
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Specifier Notes: Extruded bearing holes in frame 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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8.	Sleeve: 12 inch 20 gauge sleeve provided standard with air straightener mounted in the sleeve.16 or 14 gauge sleeve and other sleeve lengths are available as an option.

9.	Optional Controller: Analog based programmable controller provides
	 0-10 VDC feedback for airflow, temperature, and positions of the blade
	 0-10 VDC for setpoints

10.	Air straightener: Polycarbonate honeycomb contained in sleeve attached to the damper frame. 

11.	Pressure transducer: The pressure transducer is highly accurate (+/-0.25% of range) that outputs a 0-10 VDC signal. The touch interface has quick and easy menu to allow setting of pressure ranges, output range, w.c. or pascal operation, display format of pressure, percent output or “ON”.

12. Finish: Mill Galvanized finish is standard.
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Specifier Notes: Standard finish is mill galvanized. Consult Greenheck for assistance in specifying finishes for specific applications 
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13. Temperature Rating: -20° F to 180° F (-29° C to 82° C).

14.	Mounting: The AMD series is suitable for horizontal airflow applications.

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, 24 VAC, modulating, fail close
•	Electric, 24 VDC, modulating, fail close
•	Manual Quadrant

2.	Mounting: 
•	External
•	Internal

B.	Flanges:
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Specifier Notes: Flanged sleeve is available as upstream side, downstream side, or both sides.
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1-1/2 inches roll formed as part of the sleeve.

2.4	SOURCE QUALITY CONTROL
A.	Factory Tests: Factory cycle damper and actuator assemblies to assure proper operation. K & M variables are specific to each damper with a factory applied label.

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 Installation Instructions.

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.

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

END OF SECTION