P.O. Box 410
Schofield, WI 54476

Phone: 715.359.6171
www.greenheck.com

	

Product Specification Guide
Model HCD – x24 Series 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
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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.	Flanged frame, painted galvanized steel control dampers suitable for high temperature 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 actuators).

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.	IECC - International Energy Conservation Code

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 figure 5.3 (Ducted Inlet, Ducted Outlet)
4.	Include a copy of Installation Instructions.

1.5	 QUALITY ASSURANCE

A.	Dampers shall be manufactured under an ISO-9001 Quality Control Program

B.	Dampers shall be manufactured by a reputable company who is a member of the Air Movement Control Association (AMCA)

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 and material, 

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 Damper

A.	Greenheck Model: HCD-324 and HCD-524

B.	Ratings
1.	Temperature: 
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•	Dampers shall have a maximum temperature rating of 1000°F. 
(HCD-324 and HCD-524)

2.	Differential Pressure: 
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•	Dampers shall have a maximum differential pressure rating of 25 in. wg. 
(HCD-324)
•	Dampers shall have a maximum differential pressure rating of 45 in. wg.
(HCD-524)

3.	Velocity: 
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•	Dampers shall have a maximum velocity rating of 5000 fpm.

C.	Construction:
1.	Frame: 
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Specifier Notes: 10 ga frame thickness are economical and sufficiently strong for most heavy duty HVAC applications. Thicker frames can be specified for more robust construction if desired.
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•	Damper frame shall be a minimum of 10 ga. painted galvanized steel (optional: Type 304SS and Type 316SS) formed into a 8 in. x 2 in. channel with 2 in. flanges. Optional frame depths are 10 in. and 12 in. and optional flange widths available are 2 ½ or 3 in. (HCD-324)
•	Damper frame shall be a minimum of 7 ga. painted galvanized steel (optional: Type 304SS and Type 316SS) formed into a 8 in. x 2 in. channel with 2 in. flanges. Optional frame depths are 10 in. and 12 in. and optional flange widths available are 2 ½ or 3 in. (HCD-324)
•	Damper frame shall be a minimum of 10 ga. painted galvanized steel (optional: Type 304SS and Type 316SS) formed into a 12 in. x 2 in. channel with 2 in. flanges. Optional flange widths available are 2 ½ or 3 in. (HCD-524)
•	Damper frame shall be a minimum of 7 ga. painted galvanized steel (optional: Type 304SS and Type 316SS) formed into a 12 in. x 2 in. channel with 2 in. flanges. Optional flange widths available are 2 ½ or 3 in. (HCD-524)

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 10 ga. high temp airfoil shape painted galvanized steel (optional: Type 304SS and Type 316SS). 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 (vertical is optional). Blade operation is opposed. (HCD-324)
•	Damper blades shall be 10 ga. high temp airfoil shape painted galvanized steel (optional: Type 304SS and Type 316SS). 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 (vertical is optional). Blade operation is opposed. (HCD-524)
•	Damper blades shall be 7ga. high temp airfoil shape painted galvanized steel (optional: Type 304SS and Type 316SS). 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 (vertical is optional). Blade operation is opposed. (HCD-524)

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: 
•	None is standard. Fiberglass and ceramic blade seals are optional. 

b.	Jamb: 
•	None is standard. Fiberglass and ceramic are optional.

5.	Linkage: External, concealed in jamb, 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 ¾ in. square plated steel. Stainless steel axle is optional. 
(HCD-324)
•	Minimum 1 in. square plated steel. Stainless steel axle is optional.
(HCD-524)

7.	Bearings: 
•	Axle bearings shall be outboard ball bearings. Outboard carbon bearings are optional.

8.	Axle Seals:
•	Double gland stuffing box is standard. Outboard double gland stuffing box is optional. 

9.	Finish: Hi temperature flame control painted galvanized steel is standard. Stainless steel is optional.
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Specifier Notes: Standard finish is painted galvanized. Consult Greenheck for assistance in specifying finishes for specific applications 
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2.3	 ACCESSORIES

A.	Actuators:
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Specifier Notes: Specify actuator type using the guidelines below. Please note that Spring Return Electric actuators can vary greatly in price as torque requirements get higher. If larger torque actuators are needed, tremendous cost savings can be realized if PO/PC actuators can be utilized. Actuators are mounted externally to the damper frame. Specifier selects the required actuator type as shown below
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1.	Type - Electric: 
•	Commercial Grade, Industrial Grade, No Preference, Best Cost
•	Electric, 24V or 120V or 230V – AC or DC
•	Power Open/Power Close (PO/PC) or Spring Return (fail direction needed if spring return is chosen)
•	2-position or Modulating – (modulating signal needs to be specified if modulating operation is required – this is typically 4-20mA or 2-10VDC)
•	Nema Rating if needed
•	Auxiliary Limit Switches if needed

2.	Type – Pneumatic: 
•	Power Open/Power Close (PO/PC) or Spring Return (fail direction needed if spring return is chosen)
•	2-position or Modulating– (modulating signal needs to be specified if modulating operation is required – this is typically 3-15 PSI or 4-20mA)
•	Pneumatic supply pressure – 80 psi
•	Auxiliary Limit Switches if needed

B.	Mounting Holes: Mounting holes are optional.

2.4	SOURCE QUALITY CONTROL

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

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.	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