Ruskin Manufacturing	December 1996
3900 Dr. Greaves Road
Kansas City, Missouri  64030
Phone		(816) 761-7476
Fax		(816) 765-8955

Product Guide Specification

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Specifier Notes:  This product guide specification is written according to the Construction Specifications Institute (CSI) MasterFormat, Three-Part SectionFormat, and PageFormat, contained in the CSI Manual of Practice.  Five-digit section numbers are from MasterFormat, 1995 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 "Specifier Notes" when editing this section.
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SECTION 15820

PRESSURE RELIEF DOORS

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Specifier Notes:  This section covers Ruskin Manufacturing galvanized steel, positive pressure relief doors designed to relieve pressure and prevent structural damage to ductwork or plenums in HVAC systems, in the event a damper should accidentally close while the fan is still running, Model PRD18.  Consult Ruskin for assistance in editing this section for specific applications.
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PART 1	GENERAL

1.1	SECTION INCLUDES

A.	Galvanized steel, positive pressure relief doors designed to relieve pressure and prevent structural damage to ductwork or plenums in HVAC systems.

1.2	RELATED SECTIONS

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Specifier Notes:  Edit the following list as required for the project.  List other sections with work directly related to the pressure relief doors.
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A.	Section 15810 - Ducts.

1.3	REFERENCES

A.	AMCA 500 - Test Methods for Louvers, Dampers and Shutters.

1.4	SUBMITTALS

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

B.	Product Data:  Submit manufacturer's product data.
1.	Include leakage, relief volume, and maximum pressure data.
2.	Indicate materials, construction, dimensions, and installation details.
3.	Verify door leakage ratings based on tests and procedures performed in accordance with AMCA 500.

1.5 	QUALITY ASSURANCE

A.	Capacity:  Demonstrate capacity of pressure relief door to operate according to HVAC system operating conditions.
1.	Pressure Relief Settings:  3 to 10 inches w.g. (0.7 to 2.5 kPa).
2.	Relief Airflow:  Maximum air volume of 15,000 cubic feet per minute (425 m3/min).

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 indoors, protected from damage and in accordance with manufacturer's instructions.

C.	Handling:  Handle and lift pressure relief doors in accordance with manufacturer's instructions.  Protect materials and finishes during handling and installation to prevent damage.

PART 2	PRODUCTS

2.1	MANUFACTURER

A.	Ruskin Manufacturing, 3900 Dr. Greaves Road, Kansas City, Missouri 64030.  Phone (816) 761-7476.  Fax (816) 765-8955.

2.2	PRESSURE RELIEF DOORS

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Specifier Notes:  Consult Ruskin for assistance in selecting from options for specific applications.  
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A.	Fabrication:
1.	Model:  PRD18.

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Specifier Notes:  Pressure relief mechanism is factory calibrated and preset before shipment.  Specify pressure relief setting.  Consult Ruskin for other applications. ********************************************************************************************************************

2.	Pressure Relief Setting:  [3 inches w.g. (0.7 kPa)] [4 inches w.g. (1.0 kPa)] [5 inches w.g. (1.2 kPa)] [6 inches w.g. (1.5 kPa)] [7 inches w.g. (1.7 kPa)] [8 inches w.g. (2.0 kPa)] [9 inches w.g. (2.2 kPa)] [10 inches w.g. (2.5 kPa)].

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Specifier Notes:  Pressure relief door is available in 3 sizes.  Specify size according to relief volume and pressure requirements.  Consult Ruskin for assistance in specifying size for specific applications. ********************************************************************************************************************

3.	Size:  [24 x 10 inches (610 x 254 mm)] [24 x 12 inches (610 x 305 mm)] [18 x 18 inches (457 x 457 mm)].			
4.	Frame:  Minimum 12 gage (2.8 mm) galvanized steel, Z-shaped.
5.	Door:
a.	Style:  Single-piece, steel hinge on 1 side. 
b.	Material:  Minimum 12 gage (2.8 mm) galvanized steel.

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Specifier Notes:  Negator springs assist door closure upon pressure relief and system shutdown. 
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6.	Springs:  Stainless steel negator springs.
7.	Seals:  Polyurethane foam around door perimeter.
8.	Pressure Relief Mechanism:  Exposed on face of door.
9.	Mounting:  Vertical.

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Specifier Notes:  Standard finish is mill galvanized.  Consult Ruskin for assistance in specifying special finishes for specific applications.
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10.	Finish:  [Mill galvanized] [Stainless steel].

B.	Performance Data:
1.	Temperature Rating:  Withstand maximum 250 degrees F (121 degrees C).
2.	Capacity:  Demonstrate capacity of pressure relief door to operate according to HVAC system operating conditions.

a.	Pressure Relief Settings:  3 to 10 inches w.g. (0.7 to 2.5 kPa) 	based upon a 24 inch (610) by 12 inch (305) damper @ 17” w.g. pressure.

b.	Relief Airflow:  Maximum air volume of 15,000 cubic feet per minute (425 m3/min)      based upon a 24 inch (610) by 12 inch (305) damper @ 17” w.g. pressure.

2.3	ACCESSORIES

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Specifier Notes:  Consult Ruskin for assistance in specifying accessories for specific applications.
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A.	Duct Saddle:  Transition for round duct application.

2.4 	SOURCE QUALITY CONTROL

A.	Factory Tests:  Factory calibrate and test to assure proper operation.

PART 3	EXECUTION

3.1	EXAMINATION

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

3.2	INSTALLATION

A.	Install pressure relief doors at locations indicated on the drawings and in accordance with manufacturer's installation instructions.

B.	Install pressure relief doors square and free from racking in a vertical position.

C.	Do not compress or stretch door frame into duct or opening.

D.	Handle door using frame.  Do not lift door using relief mechanism.

END OF SECTION