SPECIFICATIONS |
| B1. |
Design specifications for all fume hoods |
| B.1.1 |
Shop drawings: Contractor shall supply four copies of shop drawings for University approval prior to production, at no additional charge. |
| B.1.2 |
Fume hoods shall function as ventilated, enclosed work spaces, designed to capture, confine and exhaust fumes and vapors produced or generated within the enclosure in accordance with the performance requirements specified. Only high performance fume hoods with combination sashes shall be allowed. |
| B.1.3 |
Sash locks shall be provided at 2 inch and 18 inch vertical. |
| B.1.4 |
The combination sash shall be a full metal frame with horizontal window panels and channels. The sash shall have two panels for four-foot wide fume hoods, four panels for five- and six-foot wide fume hoods, and five or six panels for seven- or eight-foot wide fume hoods. Sliding panels shall be non-removable by hood operators. |
| B.1.5 |
Only fume hoods with a depth greater than 37 inches shall be allowed. |
| B.1.6 |
Fume hoods shall be provided with a chemically resistant safety bar installed in front of the lower airfoil. The hood shall pass all challenge tests specified with the safety bar in place. |
| B.1.7 |
Constant volume, bench-type fume hoods shall maintain essentially constant exhaust volume at any sash position. Maximum variation in exhaust CFM, static pressure and average face velocity as a result of sash adjustment shall not exceed 5% for any sash position at the specified exhaust volume. |
| B.1.8 |
Design face velocity with sash in full open position is 50 feet per minute. The vertical sash opening height used to measure the face velocity shall be 27-1/2 inches. |
| B.1.9 |
Fume hood shall be designed to minimize static pressure drop through hood. Maximum average static pressure loss readings taken three duct diameters above the hood outlet from four points, 90 degrees apart, shall not exceed 0.15 inches water column with sash in full open position at design face velocity. |
| B1.10 |
Fume hood shall be designed to minimize static pressure drop through hood. Maximum average static pressure loss readings taken three duct diameters above the hood outlet from four points, 90 degrees apart, shall not exceed 0.15 inches water column with sash in full open position at design face velocity. |
| B1.11 |
Fume hoods shall be available in standard widths of 4, 5, 6, and 8 feet. (Seven-foot wide hoods shall also be included in the contract if they are a standard width produced by the manufacturer.) |
| B1.12 |
The fume hood manufacturer shall provide a pre-piped, pre-wired junction box at the top of the fume hood for a single point connection of 120v AC power to supply receptacles, light switch and fixture, along with any other control or accessory requiring an electrical supply. Transformers required to step voltage down for fume hood controls or accessories shall be pre-installed and pre-wired in the factory by the fume hood manufacturer. |
| B1.13 |
All work must conform to all State of Wisconsin Codes. |
| B1.14 |
Fume Hood must be Underwriters Laboratories subject 1805 classified. Proper labeling must be affixed to the face of each fume hood indicating classification to the UL 1805 standard for Laboratory Fume Hoods. |
| B1.15 |
All service controls, switches and electrical receptacles shall be mounted at locations on the front of the fume hood post(s). Fume hoods specified to be ADA compliant shall have all fixture controls, switches and receptacles mounted at a maximum height of 54 inches off the floor. |
| B1.16 |
Ceiling closure panels and fill panels shall match hood exterior. |
| B2 |
Plumbing/water specifications for all fume hoods |
| B2.1 |
Factory pre-piping shall extend 2 inches beyond top or bottom of the fume hood. All piping shall be pressure tested in factory. Pipe ends shall be capped until final connection is made. |
| B2.2 |
Water Service shall be 3/8 inch, type L copper water tube, H (drawn temper, ASTM B88; wrought copper pressure fittings, ANSI B16.22 lead free (<.2%) solder, ASTM B32 flux, ASTM B813 copper phosphorous brazing alloy, AWS A5.8 Bcup |
| B2.3 |
Cold water piping, fittings and valve bodies shall be factory insulated with thick closed cell elastomeric insulation. Where possible, insulation shall be slipped over piping. Joints and seams shall be sealed with a full bed of adhesive on both surfaces. Taped joints and seams shall not be acceptable. |
| B2.4 |
Reagent Grade (R.O.) Water Service
Polypropylene pipe and fittings, copolymer ASTM D-4101, Schedule 80 or SDR 11, 150 psi rating at 68oF, maximum 200oF, heat fusion fittings. |
| B2.5 |
Reagent grade water piping, fittings and valve bodies shall be factory insulated with thick closed cell elastomeric insulation. Where possible, insulation shall be slipped over piping. Joints and seams shall be sealed with a full bed of adhesive on both surfaces. Taped joints and seams shall not be acceptable. |
| B2.6 |
Cup sinks shall be manufactured of modified epoxy resin, oval shaped, nominal 3 inch x 6 inch, with 1-1/2 inch IPS outlet. Color shall be black. |
| B2.7 |
There shall be no raised lip around cup sinks in the fume hood work surface; drainage should be allowed to enter the cup sink. |
| B2.8 |
Work surface cutout for cup sink shall have rabbet perimeter to allow flush mounting of cup sink rim with dished surface. Raised cup sink lips are prohibited. |
| B2.9 |
Cup sinks shall be located in front half of work surface under water fixture. Installation shall be coordinated with acid storage base cabinets beneath cup sink. A penetration shall be provided through chemical storage base cabinet for the tailpiece of the cup sink drain. |
| B2.10 |
Cup sink locations shall be provided as indicated on the order, right hand or left hand, or both sides. |
| B2.11 |
Single service cold water fixtures shall be manufactured with forged brass valve bodies, with 80 psi working pressure, renewable type neoprene valve disc and a replaceable stainless steel seat. Valve body shall be front loaded type mounted inside superstructure wall. |
| B2.12 |
Fixture outlets shall be brass, stem type with 90 degree tip, panel mounted in side wall liner of fume hood above cup sink. Fixture outlet shall have removable serrated tips, acid and solvent resistant epoxy finish. . Fixture outlet shall have a color-coded mounting washer. Fixture control handle mounted in exterior superstructure post shall be chrome four arm metal paddle handle with plastic color-coded center index button that matches color of serrated tip mounting washer. |
| B2.13 |
Water fixtures shall be factory pre-piped with vacuum breakers in State of Wisconsin Department of Commerce approved configuration. |
| B2.14 |
Watersaver Faucet Co. L100 vacuum breaker or University-approved equal shall be mounted on exterior, top front corner of fume hood superstructure post. Vacuum breaker shall have polypropylene flow cup with air pocket for buoyancy and tight seal under low flow conditions. |
| B2.15 |
Reagent Grade Water Fixtures shall be manufactured with forged brass valve bodies, with 80 psi working pressure. All valve components in contact with pure water shall be polypropylene. Valve body shall be front loaded type mounted inside superstructure wall. |
| B2.16 |
Fixture outlets shall be polypropylene, gooseneck type with panel mounted turret base in sidewall liner of fume hood above cup sink. Fixture outlet shall have removable serrated tip and color-coded mounting washer. Fixture control handle mounted in exterior superstructure post shall be black plastic bonnet type handle with plastic color-coded center index button that matches color of fixture mounting washer. |
| B3 |
Gas and steam service specifications for all fume hoods |
| B3.1 |
Vacuum and Nitrogen Service shall be 3/8 inch, type L copper water tube, cleaned, washed and capped, H (drawn temper, ASTM B88; wrought copper pressure fittings, ANSI B16.22 lead free (<.2%) solder, ASTM B32 flux, ASTM B813 copper phosphorous brazing alloy, AWS A5.8 Bcup. |
| B3.2 |
Natural Gas, Compressed Air, and Steam Service shall be ASTM A53, type E or S, standard weight (schedule 40) black steel pipe with ASTM A197/ANSI B16.10 class 150 black malleable iron threaded fittings using thread lubricant or teflon tape. |
| B3.3 |
Vacuum, Natural Gas, Nitrogen, and Compressed Air Fixtures shall be manufactured with forged brass valve bodies, with125 psi working pressure, needle valve construction with renewable type stainless steel floating cone and a replaceable stainless steel seat. Valve body shall be front loaded type mounted inside superstructure wall. |
| B3.4 |
Fixture outlets shall be brass, stem type, panel mounted in sidewall liner of fume hood above cup sink. 30 degree angle removable serrated tips, acid and solvent resistant epoxy finish with color-coded mounting washer. Fixture control handle mounted in exterior superstructure post shall be chrome four arm handle with plastic color-coded center index button matching color of serrated tip mounting washer. |
| B3.5 |
Steam Fixtures shall be manufactured with forged brass valve bodies, with 20 psi working pressure, renewable type teflon valve disc and replaceable stainless steel seat. Valve body shall be front loaded type mounted inside superstructure wall. |
| B3.6 |
Fixture outlets shall be brass, stem type, panel mounted in sidewall liner of fume hood above cup sink. 30 degree angle removable serrated tips, acid and solvent resistant epoxy finish with color-coded mounting washer. Fixture control handle mounted in exterior superstructure post shall be chrome four arm handle with plastic color-coded center index button matching color of serrated tip mounting washer. |
| B4 |
Electrical specifications for all fume hoods |
| B4.1 |
All materials and installation methods shall meet the requirements of the National Electric Code. |
| B4.2 |
Wiring shall be minimum #12 copper, type THHN/THWN insulation. Wire color coding shall be black for current carrying conductors, white for neutral conductors and green for ground conductors. |
| B4.3 |
Conduit shall be 1/2 inch, flexible metal, galvanized spiral strip. Conduit shall be secured to superstructure framework with conduit clamps. |
| B4.4 |
Junction Boxes shall be 4 inch square by 2-1/8 inch deep, with code gauge galvanized steel, screw covers. |
| B4.5 |
Spring Wire Connectors shall be solderless spring type pressure connectors with insulating covers for splices and taps. |
| B4.6 |
All electrical devices shall be UL listed. |
| B4.7 |
Fume hood light fixture shall have two rapid start, fluorescent type lamps with sound rated electronic ballasts mounted on the exterior of fume hood roof. Fixture shall be mounted in roof liner and sealed behind a laminated safety glass panel to isolate light fixture from fume hood interior. Interior of light fixture shall be white, high reflecting plastic enamel. Lamps shall be removable from the exterior of the fume hood. |
| B4.8 |
Average illumination of work surface shall be at least 90 foot candles. |
| B4.9 |
Lamps shall be provided with fume hood light fixtures. |
| B4.10 |
Light fixture switch shall be toggle type mounted in front post of superstructure. Switch cover plate shall be stainless steel with a brushed finish and labeled LIGHT. |
| B4.11 |
Receptacles shall be duplex, GFCI, grounding type, hospital grade. Provide flush, stainless steel, brushed finish receptacle cover plates. |
| B4.12 |
Unless noted otherwise, receptacles shall be 120v AC, 20A. |
| B4.13 |
Fume hood light fixture, switch and receptacles shall be pre-wired by the manufacturer to a junction box on the exterior roof of the fume hood for a single point power connection to the building electrical system. |
| B5 |
Ventilation specifications for all fume hoods |
| B5.1 |
VENTILATION CONNECTIONS
Fume hood exhaust collar shall be rectangular or round with a parabolic, bell shaped, or tapered entry at the connection to fume hood to minimize static pressure drop. Collar shall be constructed of type 316L stainless steel or steel with a reagent resistant coating. |
| B5.2 |
For a fume hood installed over an acid storage base cabinet, a 1-1/2 diameter polypropylene vent pipe connecting from the rear of the base cabinet to the inside hood chamber behind the rear baffle plate shall be provided. The vent pipe penetration shall be sealed and the pipe shall extend a minimum of 1 above the fume hood work surface. |
| B6 |
Safety monitor and alarm system specifications for all fume hoods |
| B6.1 |
Acceptable safety monitors/alarms are:
*TSI, Model 8610
*Flow Safe, Model HAM-VFV
*TEL, Model AFA 1000
*University-approved equal |
| B6.2 |
Safety monitor and alarm shall continuously monitor face velocity and provide audible and visual alarm if face velocity falls below low alarm setpoint or rises above high alarm setpoint. |
| B6.3 |
The monitor shall have one set of dry contacts for connecting alarm to either set back sequence or building management system. |
| B6.4 |
Monitor and velocity sensor shall be factory installed and prewired on the hood, complete with low voltage transformer and transformer cable. |
| B6.5 |
The calibration of the monitor shall be completed in the field by the fume hood installer. Monitor shall be adjusted for a 40 fpm low alarm, 1000 fpm high alarm. |
| B7 |
Signage specifications for all fume hoods |
| B7.1 |
Instructional signage to explain the fume hood operational and safety instructions shall be provided. Signage shall be mounted on the front of each fume hood in plain view of user. Signage shall be plastic engraved laminate or directly applied silkscreen using chemical resistant epoxy ink. Signage shall have red background and white lettering in a font equal to Arial, 14 point.
Sign shall also include manufacturers model number for the fume hood. |
| B8 |
Manuals and training DVD specifications for all fume hoods |
| B8.1 |
Contractor shall provide a professional quality DVD at least 15 minutes in length on proper hood usage. The DVD shall convey:
*The basic concept of a fume hood and how it serves to protect users.
*The function of the sash and its proper use.
*Safety rules for proper movement in the work zone.
*Safety rules for fume hood loading.
*A high volume smoke demonstration on the hoods containment potential and how improper use can compromise containment.
*Fume hood alarm features and how the user should respond to these |
| B8.2 |
Contractor shall provide a 8-1/2 x 11" sized, rigid plastic or stainless steel pocket permanently attached to the front of each fume hood for storage of operation and maintenance manuals. |
| B8.3 |
Each fume hood shall be provided with its own copy of the fume hood operation and maintenance manual and the fume hood monitor/alarm operation and calibration manual that were approved during the shop drawing review. Note that these copies do not need to be the actual stamped and approved copies, but they must be duplicates of the shop drawing review copies that were stamped and approved. The manuals shall be provided in the pocket permanently attached to each fume hood. |
| B8.4 |
A jacketed copy of the instructional training DVD shall be provided for each fume hood in the permanently attached pocket on the fume hood. |
| B9 |
Installation specifications for all fume hoods |
| B9.1 |
Installers shall be trained and certified by the manufacturer, and have five years or more experience in installation of laboratory fume hoods, casework and equipment of the type specified. Installers shall be knowledgeable with calibration procedures for the fume hood alarm and monitor specified. |
| B9.2 |
Finished surfaces shall be protected from soiling or damage during handling and installation, covered with polyethylene film or other protective coating. All work surfaces shall be protected throughout construction period with 1/4 inch corrugated cardboard completely covering the top and securely taped to edges. Any tape used on fume hood surfaces shall be non-delaminating. Contractor shall be responsible for removal of taping adhesive. Sash and counterbalance mechanism shall be secured during shipping. |
| B9.3 |
For hoods to be installed by the Contractor, the Contractor shall review all project conditions and building limitations such as doorway sizes, corridor widths, ceiling heights, and obstructions and shall determine any disassembly and re-assembly methods necessary for access of each fume hood into its final location. Any costs associated with disassembly, re-assembly and access to the fume hood final locations shall be the responsibility of the Contractor and shall be included in the contract price bid. |
| B9.4 |
Contractor shall not deliver or install fume hoods until the following conditions have been met:
* Building areas requiring the installation of fume hoods shall be dry and not exposed to construction activities or adverse weather conditions which may damage finished materials.
*Interior building temperatures shall not register below 65 degrees F. in areas of fume hood installation to permit the proper curing of epoxy sealants and adhesives.
*Walls and partitions shall be in place and finished with at least the primer coat of paint. If finish painting is to take place after fume hood installation, Contractor shall protect fume hoods by covering and masking prior to commencement of painting.
*Overhead soffits and ceiling grid shall be in place and overhead lighting shall be installed and connected prior to fume hood installation.
*All flooring required to be placed under fume hoods and base cabinets shall be installed prior to material delivery. |
