15856 Gravity Ventilators.pdf

Ohio Army National Guard Armed Forces Reserve Center/Field Maintenance Shop

Springfield, Ohio ARNG Project #390169 / 390170

SECTION 15856 – HVAC GRAVITY VENTILATORS

1. GENERAL

1.1 SUMMARY

A. Section Includes: HVAC Gravity Ventilators

B. Related Sections:

1. Division 1 General Requirements

2. Division 7 Thermal and Moisture Protection

3. Division 9 Finishes

4. Division 15 Heating, Ventilating, and Air-Conditioning (HVAC)

1.2 REFERENCES

A. Air Movement and Control Association Inc. (AMCA):

1. 99 - Standards Handbook

2. 200 - Publication, Air Systems

3. 201-90 - Publication, Fans and Systems

4. 202-88 - Publication, Troubleshooting

B. American Society of Civil Engineers (ASCE):

1. 7-02 - Minimum Design Loads for Building and Other Structures

C. American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc.

(ASHRAE):

1. Chapter 45 - 2003 Handbook, HVAC Applications

2. Chapter 7 - 2001 Fundamentals handbook, Sound-Vibration

3. Chapter 32 - 2001 Fundamentals handbook, Duct Design

D. American Society for Testing and Materials (ASTM):

1. E330-02 - Standard Test Method for Structural Performance of Exterior

Windows, Doors, Skylight and Curtain Walls by Uniform Static Air Pressure

Difference

E. National Fire Protection Association (NFPA)

1. 1926.300 - General requirements for safe operation and maintenance of hand and power tools

1.3 SUBMITTALS

A. General: Submit in accordance with Section 01330 Submittal Procedures

B. Provide dimensional drawings and product data on each fan

C. Provide fan curves for each fan at the specified operation point, with the flow, static pressure and horsepower clearly plotted

D. Provide outlet velocity and fan's inlet sound power readings for the eight octave bands, decibels, and sones

E. Strictly adhere to QUALITY ASSURANCE requirements as stated in section 1.04 of this specification

F. Provide manufacturer's certification that exhaust fans are licensed to bear Air

Movement and Control Association (AMCA), Certified Rating Seal for sound and air performance

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G. Installation, Operation, and Maintenance Manual (IOM): Provide manufacturer's installation, operations, and maintenance manual, including instructions on installation, operations, maintenance, pulley adjustment, receiving, handling, storage, safety information and cleaning. A troubleshooting guide, parts list, warranty and electrical wiring diagrams

1.4 QUALITY ASSURANCE

A. Performance ratings: Conform to AMCA standard 211 and 311. Fans must be tested in accordance with ANSI/AMCA Standard 210-99 and AMCA Standard 300-96 in an AMCA accredited laboratory. Fans shall be certified to bear the AMCA label for air and sound performance seal

B. Classification for Spark Resistant Construction Conform to AMCA 99

C. Each fan shall be given a balancing analysis which is applied to wheels at the outside radius. The maximum allowable static and dynamic imbalance is 0.05 ounces

(Balance grade of G6.3)

D. Comply with the National Electrical Manufacturers Association (NEMA), standards for motors and electrical accessories

1.5 DELIVERY, STORAGE, AND HANDLING

A. Delivery: Deliver materials to site in manufacturer’s original, unopened containers and packaging, with labels clearly indicating manufacturer, material, products included, and location of installation

B. Storage: Store materials in a dry area indoor, protected from damage, and in accordance with manufacturer’s instructions. For long term storage follow manufacturer's Installation, Operations, and Maintenance Manual

C. Handling: Handle and lift fans in accordance with the manufacturer’s instructions.

Protect materials and finishes during handling and installation to prevent damage.

Follow all safety warnings posted by the manufacturer

1.6 WARRANTY

A. Manufacturer's Warranty: Submit, for Owner's acceptance, manufacturer's standard warranty document executed by authorized company official. Manufacturer's warranty is in addition to, and not a limitation of, other rights Owner may have under

Contract Documents

1. The warranty of this equipment is to be free from defects in material and workmanship for a period of one year from the purchase date. Any units or parts which prove defective during the warranty period will be replaced at the

Manufacturers option when returned to Manufacturer, transportation prepaid

2. Motor Warranty is warranted by the motor manufacturer for a period of one year. Should motors furnished by us prove defective during this period, they should be returned to the nearest authorized motor service station

1.7 MAINTENANCE

A. Refer to Manufacturer's Installation, Operation and Maintenance Manual (IOM), to find maintenance procedures

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2. PRODUCTS

2.1 MANUFACTURER

Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

Greenheck

2.2 SPUN ALUMINUM RELIEF GRAVITY VENTILATOR

A. General Description:

1. Ventilator is low silhouette for relief applications with natural gravity or negative pressure system

2. Selection based on non-ducted applications

3. Performance capability as scheduled

4. Each unit shall bear a permanently affixed manufacture's nameplate containing the model number and individual serial number

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B. Hood:

1. Constructed of aluminum

2. Internal structure is constructed of galvanized steel

C. Birdscreen:

1. Constructed of ½ inch Aluminum mesh

2. Mounted horizontally across the intake area of the hood

D. Housing:

1. Curb Cap type: No Hinged

2. Constructed of aluminum, includes windband and curb cap. Galvanized material is not acceptable

3. Windband to be one piece spun aluminum construction and maintain original material thickness throughout the housing.

4. Windband to include an integral rolled bead for strength

5. Curb cap to have integral deep spun inlet venturi and prepunched mounting holes to ensure correct attachment to roof.

E. Options/Accessories:

1. Curb Seal:

a. Rubber seal between fan and the roof curb

2. Roof Curbs:

a. Type: GPI

b. Mounted onto roof

c. Material: Aluminum

d. Insulation thickness: 1.5 inches

e. Coating Type Permatector

3. Dampers:

a. Type: Motorized

b. Prevents outside air from entering back into the building when fan is off

c. Balanced for minimal resistance to flow

d. Galvanized frames with prepunched mounting holes

4. Finishes:

a. Type: Permatector

5. Flashing Flange:

a. Constructed of aluminum

b. Pre-punched holes for installation without a roof curb

3. EXECUTION

3.1 MANUFACTURER'S INSTRUCTIONS

A. Compliance: Comply with manufacturer's product data, including technical bulletins, product catalog installation instructions

3.2 EXAMINATION

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A. Examine areas to receive fans. Notify the Contracting Officer of conditions that would adversely affect installation or subsequent utilization and maintenance of fans.

Do not proceed with installation until unsatisfactory conditions are corrected

3.3 PREPARATION

A. Ensure roof openings are square, accurately aligned, correctly located, and in tolerance

B. Ensure duct is plumb, sized correctly, and to proper elevation above roof deck.

Install duct as specified in Air Distribution (Division 23)

3.4 INSTALLATION

A. Install fans system as indicated on the Installation, Operation and Maintenance

Manual (IOM) and contract drawings

B. Install fans in accordance with manufacturer's instructions

3.5 SYSTEM STARTUP

A. Refer to Installation, Operation, and Maintenance Manual (IOM)

3.6 ADJUSTING

A. Ventilators shall be adjusted according to manufacturer's instructions

3.7 CLEANING

A. Clean as recommended by manufacturer. Do not use material or methods which may damage finish surface or surrounding construction

3.8 PROTECTION

A. Protect installed product and finished surfaces from damage during construction

B. Protect installed ventilators to ensure that, except for normal weathering, fans will be without damage or deterioration at time of substantial completion

END OF SECTION 15856