Large Natural Ventilator - Moffitt Corporation · MoffittVent™ Large Natural Ventilator MoffittCorp.com | (800) 474-3267 1351 13th Ave S. Suite 130 Jacksonville Beach, FL 32250

MoffittVent™ Large Natural Ventilator

MoffittCorp.com | (800) 474-3267 1351 13th Ave S. Suite 130 Jacksonville Beach, FL 32250

MoffittVentTM natural ventilator

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MoffittVent™ Table of Contents

MoffittVent™ Table of Contents ..........................................................................................................2

MoffittVent™ Product Details ..............................................................................................................3

Natural Ventilation System Design .......................................................................................................4

MoffittVent™ MV-24, MV-48, & MV-72 Submittal Data.........................................................................5

MoffittVent™ MV-96, MV-144, MV-180 Submittal Data ........................................................................6

MoffittVent™ Damper.........................................................................................................................7

MoffittVent™ Mounting Details ...........................................................................................................8

MoffittVent™ Air & Water Flow Diagram ...........................................................................................9

MoffittVent™ Operation and Maintenance Manual ............................................................................ 10

MoffittVent™ Pictures....................................................................................................................... 11

MoffittVent™ Guide Specification ...................................................................................................... 12



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MoffittVent™ Product Details

STANDARD FEATURES Throat sizes: 24” – 180” Lengths: 10’ – 1000’+

Mounting: Ridge, Slope, or Single Peak

Hot-Dip Galvanized Steel Frame Galvalume sheeting, Mill Finish

Zinc plated sheeting fasteners

Integral transverse baffles for increased air flow through unit.

100% free area to face area ratio.

Gutters and Downspouts

Mounting Clips and Fasteners Designed to meet local wind & snow codes

Installation instructions

Attachment Coordination Drawings

OPTIONAL FEATURES Sheeting

o Aluminum o Stainless Steel o Fiberglass

Painted sheeting o Kynar® Exterior with Wash Coat Interior o Kynar® Interior and Exterior o other specialty coatings

Frames o Corrosion resistant o Painted o Stainless

Bird Screen o ½” mesh 19 ga. Galvanized steel o ¾” mesh .050 expanded aluminum

Damper o Manual Damper

Direct chain pull from below Hand crank from roof Indirect winch operation

o Motorized Damper Roof Operated Motor

o Modulating

Installation o Turnkey with Extended Warranty o Supervision

BENEFITS Uses no energy, has no operating costs, and requires no maintenance (on units w/o damper)

Is not affected by the direction or velocity of the wind. Water is collected and then redirected.

Exhaust performance increases in higher wind conditions due to natural ventilation design

Designed to withstand 130 MPH at grade wind-speeds. Can be modified to meet higher wind speeds Damper Operation works up to 80’ of damper, depending upon the throat size.

Natural Daylighting

APPLICATION Aluminum Power stations

Glass

Rolling mills Steel

Foundries

Forges Warehouses

Compressor Stations

PRODUCT DESCRIPTION The MoffittVent™ natural ventilator is designed to evacuate hot air while preventing water entrance. This highly effective & highly efficient ventilator has helped buildings stay cool for over 50 years.



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Natural Ventilation System Design

A Natural Ventilation system provides a natural intake for fresh supply air and a natural evacuation point for hot air and fumes. Warm air naturally rises to the ceiling, natural ventilation lets it escape. This system has zero operating cost, zero maintenance costs, and makes for a cooler and more comfortable facility

Our 50 years of experience gives us the ability to design the optimal ventilation solution for your

facility. With our experience and time tested formulae we can design the optimal ventilation system for your facility.

Visit MoffittHVAC.com/Vent-Selector to begin designing a Natural Ventilation system yourself. Simply input the variables for your building (dimensions, heat load, etc.) and you’ll find out how much ventilation your building will need.

If you have any questions about this program, or if you want to talk about your results, contact us at 1-800-474-3267.

MoffittHVAC.com/Vent-Selector



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MoffittVent™ MV-24, MV-48, & MV-72 Submittal Data

STANDARD FEATURES 1. Airshaft Frame 2. Damper – Single Leaf (if required) 2. Operator 3. Rack & Pinion 4. Airshaft Panel 5. Wind band Frame 6. Fixed Top Frame 7. Top Tie Angle 8. Stringer Angle 9. Drain Gutter (w/ downspouts to wind band) 10. Corrugated Fixed Top Panel 11. Fixed Top Cap 12. Transverse Baffle 13. Corrugated Wind band 14. Corrugated Wind band 15. Bird Screen (if required)



Painted sheeting o Kynar Exterior with Wash Coat Interior o Kynar Interior and Exterior o other specialty coatings

Frames o Corrosion resistant coating o Prime Paint Red




o Motorized Damper 1/4 hp, 460/3/60 Roof Operated

o Modulating

All Specifications are subject to change without notice unless approved in submittal by Moffitt Corporation, Inc.

Model Throat Width

A

Vent Height

B

Frame Width

C

Weight

(lb/ft)

MV-24 24" 34-1/2" 61-1/4" 55 MV-48 48" 62-3/8" 114-1/2" 95 MV-72 72” 92-1/2” 168” 160

Line Quantity Throat Length Mounting Location

1 2

3 4

5

A

B

C



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MoffittVent™ MV-96, MV-144, MV-180 Submittal Data

STANDARD FEATURES 1. Airshaft Frame 2. Damper – Double Leaf

(If required) 3. Operator 4. Rack & Pinion 5. Airshaft Panel 6. Wind band Frame 7. Fixed Top Frame 8. Top Tie Angle 9. Stringer Angle 10. Drain Gutter (With down spouts to wind band) 11. Corrugated Fixed Top Panel 12. Fixed Top Cap 13. Transverse Baffle 14. Corrugated Wind band 15. Bird Screen (if required)



Painted sheeting o Kynar Exterior with Wash Coat Interior o Kynar Interior and Exterior o other specialty coatings

Frames o Corrosion resistant coating o Prime Paint Red




o Motorized Damper 3/4 hp, 460/3/60 Roof Operated

o Modulating

All Specifications are subject to change without notice unless approved in submittal by Moffitt Corporation, Inc.

Model

Throat

Width A

Vent

Height B

Frame

Width C

Weight (lb/ft)

MV-96 96" 120" 18'-10" 236 MV-144 144" 14'-10" 27'-3" 357 MV-180 180" 17'-11" 33'-9" 572

Line Quantity Throat Length Mounting Location

1 2

3 4 5

A

B

C



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MoffittVent™ Damper

STANDARD FEATURES Sizes: 24”, 48”, 72” - single leaf Sizes: 96”, 144”, 180” - double leaf.

OPTIONAL FEATURES Manual Operator

o Direct Drop, Continuous Loop o Indirect Operator from building column

(see diagram below) o Hand Wheel Crank from roof

Motorized Operator* o Sizes 24”, 48”: 1/3 HP, 460/3/360 o Sizes 72”+: 3/4 HP, 460/3/360 *require

reversing starter (by electrical contractor)

Indirect Damper Operator

All specifications are subject to change without notice unless approved in submittal by Moffitt Corporation, Inc.

Damper Section

Length

Single Leaf Damper Double Leaf Damper

24" 48" 72" 96" 144" 180"

8' 80' 80' 80' 56' 32' 24'

10' 80' 80' 80' 60' 30' 20'

Field drill matching holes as needed (Fasteners not supplied)

Line to MoffittVent™

MoffittVent™

(2) 6" Idler Wheels

(2) 3" Idle Wheels

(2) 6" Idler Wheels

Continuous loop chain

woven through Idlers from

roof peak at operator

(1) Take-up idler

7/16" Holes

Wheels Shown

# 10 Register Chain

NOTE: If no structure

exists where idlers are

required, it will be

necessary to field

fabricate a mounting

bracket for idlers.



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MoffittVent™ Mounting Details

Typical Channel Diagram Connection

Information Required for Frame Detail

Roof Slope

Roof Depth Size, Weight, Type of

”W” Beams Size, Weight, Type of

Purlin Truss Spacing

Not in Ventilator Contract Channel Diaphragm

Holes in channel

diaphragm

"W" Beams

Holes in “W” Beams”

Closure

Closure Screw

Purlins

Roofing

Typical Curb Mounting Connection C/L

Curb Flashing

Curb WP Airshaft Framing

Mounting Channel

Truss WP

Mtd. direct Bolt, Nut, Washer Mtd. Purlin with Clip Angle

to Purlin Vent GA Line

½ “A” ½ “A” Note: 3 Bolts are required for MoffittVent™ sizes 96” & large


Note: 3 bolts are

required for

Moffi ttVent™ sizes

96" and longer

Airshaft Panel

Roof WP

Airshaft

Framing

Truss WP Venti lator Work

Line

Vent GA Line

1/2 "a"

Bolt, Nut, Washer

Sym. Abt. 1/2 "A"

Venti lator Size= MIN. Clear Roof Opening

B' Flashing 1/4"

Flashing Clearance

Wind band

framing

“A”



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MoffittVent™ Air & Water Flow Diagram

Warm Air Exhaust

Water Flow




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MoffittVent™ Operation and Maintenance Manual

MAINTENANCE INSTRUCTIONS MoffittVent™ Ventilators are designed to provide many years of smooth, trouble-free service with only a minimal amount of periodic maintenance required. Ventilator dampers are controlled by a continuous steel line shaft (supported by roller bearing hangers at each frame), to which is attached the rack and pinion actuators. Check pinion set screw and line shaft couplings; tighten if necessary. The rack should be perpendicular to its attachment point on the damper panel, otherwise binding may occur. Adjust by loosening pinion set screw and re -positioning pinion on line shaft. Periodically apply a liberal coating of good quality gear grease (of a viscosity suited for the expected temperatures under which vents are to operate) to pinions, line shaft bearings, fixed and moving pivots. Moffitt Ventilators are designed to be self-cleaning by action of the elements. However, the atmospheric conditions to which ventilators are exposed wi ll dictate the nature and frequency of a program to clean and maintain ventilators. We would recommend every 4 months for the first year, then adjusts per site requirements. DAMPER OPERATORS

MOTOR OPERATED - When the MoffittVent™ damper system is motor operated the open-close cycle of dampers is limit switch controlled. The unit will automatically shut off at the end of open or close cycle. Any intermediate damper position may be set by pushing the stop button or the starter push button unit.

MANUALLY OPERATED - When the MoffittVent™ Natural damper system is manually operated the open-close cycle of dampers is controlled by either a wheel handle located on the roof external to the unit or manual chain wheel drop located below the unit. The Damper can be ope ned or closed to any position by simply stopping the damper in the desired location. Visual inspection of the damper location is done through access doors located next to each operator wheel.

COMPONENT ACCESS Access the components inside the ventilator by removing the sheet of cladding from the side of the unit. A scaffold should then be spanned across the ventilator throat to reach to service the interior components. Remove scaffold and re-install cladding once maintenance has been completed. METAL STORAGE & MAINTENANCE - IMPORTANT

If not used immediately the metal should be stored in a dry place where there is as little moisture as possible to avoid staining or white rust. Moisture from rain, snow, condensation, etc. should be avoided as it can get trapped between the stacked materials.

Break the steel strapping bands used for shipment and store with the stacks or crates of metal in an inclined position.

If outdoor storage cannot be avoided, protect the metal with canvas or waterproof paper cover. Leave the bottom of the canvas loose to allow for air movement. Keep the steel off the ground in an inclined position with an insulator, such as wood. Do not use plastic! Plastic can cause sweating or condensation on the metal

Failure to follow above instructions could affect equipment warranty.



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MoffittVent™ Pictures



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MoffittVent™ Guide Specification

1.1. DESCRIPTION Furnish and Install MoffittVent™ and accessories as indicated on drawings.

1.2. QUALITY ASSURANCE

MOFFITT (Jacksonville, FL, 1-800-474-3267) Products establish the standard of quality required. Manufacturer and erector shall demonstrate a minimum of five (5) years of related industry experience.

1.3. SUBSTITUTIONS No substitutions will be considered unless written request for approval has been submitted by the bidder and has been received by the designer at least ten (10) days prior to bid date. Any proposed substitutions should meet the standards set by the specification.

1.4. SUBMITTALS

Furnish approval drawings (coordinated attachment points) prior to fabrication. Furnish erection package prior to

shipment showing a ll erection procedures and accessories required for the specified product.

2.1. DESIGN Moffi ttVent™ shall be designed to withstand a windward load of _______ psf and a _____ psf snow load with s tructural frames located 10’ on center s tandard or 8’ on center if required for loading. Throat s ize shall be _______.

2.2. MATERIALS

2.2.1. The Moffi ttVent™ free area shall increase proportionally throughout so as not to restrict ca lculated velocities with the exhaust opening not exceeding 1.5 times the throat size.

2.2.2. Al l ventilators shall be capable of self-cleaning by action of the elements, with provisions for carrying water and normal wind-transported soil to the outside of the ventilator.

2.2.3. Frames shall be constructed of minimum 3/16” ASTM A36 s teel plate, angle and channel, and shall be shop welded. Component parts shall be sized for ease of shipment and handling, and be field assembled.

2.2.4. After fabrication, a ll s tructural components shall be hot dip galvanized. Sheeting shall be 22 gauge

(Galvalume/G90 galvanized steel substrate: choose one) (note: for mill finish sheeting must be Galvalume) for the accelerator, hood, and end wall sheeting. The sheeting shall be (choose one): 2.2.4.1. Mil l finish

2.2.4.2. Exterior s tock Kynar® color to match interior wash coat 2.2.4.3. Exterior s tock Kynar® color to match interior Kynar® color

2.3. ACCESSORIES

Venti lators shall be equipped with 1/2” mesh, 19 gauge, galvanized bird screens attached to 3/8” diameter galvanized rod frames. Ventilators shall be equipped with dampers, each with a permanently sealed and lubricated mechanical gear reducer. The gear reducers shall open and close the dampers by means of rack arm and pinion gear operations. The damper shall be manually operated with a continuous loop chain wheel, manual roof hood crank, or electrically operated us ing ¼ or ¾ horsepower, 1800 RPM T.E.N.V. motors (choose one). Dampers shall be an integral part of the ventilator and

shall form an inverted cone under the hood when the damper is in the open position for 5’ s izes and above, and single leaf for s izes 4’ and below.

3.1. INSPECTION

Examine a lignment of structural steel prior to installation and do not proceed until s tructure is within tolerances

established by AISC.

3.2. INSTALLATION AND ERECTION Install MoffittVent™ and accessories in conformance with approved drawings and MOFFITT specifications & erection instructions.

3.3. DAMAGED MATERIAL

Repair or replace a ll damaged material.

Documents

Large Natural Ventilator - Moffitt Corporation · MoffittVent™ Large Natural Ventilator MoffittCorp.com | (800) 474-3267 1351 13th Ave S. Suite 130 Jacksonville Beach, FL 32250