P.O. Box 410
Schofield, WI 54476

Phone: 715.359.6171
www.greenheck.com

Product Specification Guide
Model PRAD and VRAD Access Doors
Facility Service Subgroup: Division 08 Door and Window

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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 - 2004 Edition.
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 unnecessary "Specifier Notes" when editing this section.

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PART 1   GENERAL

1.1	WORK INCLUDED

A.	Pressure Relief Doors – PRAD (Positive) and VRAD (negative)

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 233333 Air Duct Accessories (formerly 8300 – Specialty Door)

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. ****************************************************************************************************

1.4	SUBMITTALS

A.	Submit under provisions of Section 233333.

B.	Product Data: Submit manufacturer’s product data.
1.	Include maximum pressure data.
2.	Indicate materials, construction, and dimensions.

1.5	QUALITY ASSURANCE

A.	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, 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	Access Doors

A.	Model: PRAD (positive pressure) and VRAD (negative pressure)

B.	Ratings

1.	Differential Pressure: 
•	Pressure relief doors open automatically at 1 in. wg above normal operating pressure. 

2.	Leakage: 
•	Leakage shall not exceed 0.6 cfm per sq. ft at 10 in. wg. 

C.	Construction:
1.	Frame: 
Frames shall be of Z (out swing) or T (in swing) shape, extruded aluminum with a minimum wall thickness of .062 inches. 

2.	Door: 
Door panels shall be of solid core, 1 in. thick, of extruded aluminium and minimum G60 galvanized steel, injected with closed-cell polyurethane foam. 

3.	Door Gasket:
Door gasket shall be of extruded PVC of a leaf-type design.

4.	Door Assemblies:
Door assemblies shall include a spring-cushioned stop device to limit open travel to 80 degrees maximum. Pressure relief mechanism shall be factory and field adjustable.

5.	Finish: Mill finish is standard.

PART 3	 EXECUTION

3.1	EXAMINATION

A.	Examine areas to receive access doors. Notify the Engineer of conditions that would adversely affect installation or subsequent utilization of access doors. Do not proceed with installation until unsatisfactory conditions are corrected.

3.2	INSTALLATION

A.	Install doors in accordance with manufacturer’s Installation Instructions.
B.	Install access doors square and free from racking. 

END OF SECTION