Protector® ClassMate™ Laboratory Hoods LABCONCO GLASS-LINED BENCHTOP FUME HOOD SPECIFICATION BY-PASS REMOTE BLOWER UNITS PART 1 - GENERAL 1.01 Scope and Classification 1.01.01 This specification covers the requirements for the purchase of bench-mounted glass-lined laboratory fume hoods for remote exhaust blower systems. It is written to cover the by-pass design configuration and service fixture configurations that are available on these hoods. 1.01.02. Bench-mounted laboratory fume hoods in 4, 5, and 6 foot widths and internal depths of 25.75". 1.01.03. This specification sets the intent for quality, performance and appearance. 1.02 Requirements: 1.02.01 Laboratory hoods shall be dry powder, epoxy coated steel and aluminum frame with clear tempered safety glass sides, back, baffle, viewing window and sash. The single 3/16" thick sash shall be vertical-rising from closed to 18" high at the sash stop and 29" fully open. The 1/4" thick viewing window above the sash shall provide 39" high visibility. Hood side and rear visibility shall be 44". Hoods shall be provided with an air foil with Clean-Sweep(tm) airflow slots across the bottom of the sash area. A secondary spill trough shall be provided under the air foil. Access for maintenance shall be from both the front and interior sides of the hood. All- hood mounted service fixtures, where provided, shall be pre-plumbed. All electrical services shall be pre-wired to junction boxes on the top of the hood. Hood shall be one piece construction. Hoods shall pass through a 35" opening without disassembly. 1.03 Quality Assurance: 1.03.01 The hood manufacturer shall maintain a testing facility at its place of business for the testing of bench-mounted laboratory hoods in accordance with ASHRAE Standard 110-95. Both hoods and installation shall be in conformance to good construction practice and approved by the owner/user. Only hood manufacturers who have had fume hoods as a principal product for ten years will be considered. The hood manufacturer's manufacturing and test facilities and its quality control procedures must be available for owner/user inspection. 1.04 References: 1.04.01 The laboratory hoods shall conform to the following regulations and standards: SEFA - #1 (Laboratory Fume Hoods) NFPA - #45 (Fire Protection for Laboratories Using Chemicals 2000) section 6-1 through 6-14 ASTM-E-84 - Surface Burning Characteristics of Building Materials ASHRAE - 110-95 (Method of Testing Performance of Laboratory Fume Hoods) ANSI - Std. Z 9.5 (Laboratory Ventilation) UL Standard 3101-1 (ETL listed) CAN/CSA Standard C22.2 No. 1010.1 (ETL listed) 1.05 Submittals: 1.05.01 Laboratory hood specification sheets and product manuals shall be submitted by the hood manufacturer upon request. The hood supplier shall submit shop drawings when necessary for clarification. 1.05.02 Sample pieces of the hood frame material and epoxy work surface material shall be available from the hood manufacturer upon request. 1.06 Delivery and Storage: 1.06.01 Laboratory hoods and work surfaces shall be delivered adequately protected from damage during shipment. 1.07 Warranty 1.07.01 Manufacturer's warranty against defects in material or workmanship on its fume hoods shall be for 1 year from date of installation or 2 years from date of purchase, whichever is sooner, shall include replacement of parts (except lamps) and labor. PART 2 - PRODUCTS 2.01 Acceptable Manufacturer: 2.01.01 Labconco Corporation, 8811 Prospect Avenue, Kansas City, Missouri 64132, Protector(r) ClassMate(tm) Laboratory Hoods, model numbers as follows: 6970400 6970401 6970500 6970501 6970600 6970601 HOPEC IV Models 6971400 6971401 6971500 6971501 6971600 6971601 2.02 Materials: 2.02.01 Hood exterior construction shall be 20 gauge or heavier cold rolled sheet steel and aluminum. All exterior painted surfaces shall be dry powder electrostatically applied epoxy-coated. Base metal material shall be properly prepared for epoxy coating. 2.02.02 Hood viewing panel, sides, back and baffle shall be 1/4" thick, tempered safety glass. Flame spread shall be less than 25 per ASTM E-84. 2.02.03 Corner posts shall be 16 gauge cold-rolled steel with epoxy- coated finish. Both corner posts shall be pre-punched and plugged to accommodate up to 2 service fixtures and 1 electrical receptacle box on each side. Right-hand corner post shall have ADA-compliant light and blower switches. 2.02.04 Exhaust connection shall be 8" nominal diameter epoxy-coated steel. 2.02.05 Hood upper rear exterior finish panel shall be optional (consult Labconco). 2.02.06 Hose connectors shall be injection molded, corrosion-resistant plastic or epoxy-coated metal. 2.02.07 Hood fascia and sash shall be angled 5ˇ and 3/16" thick tempered safety glass with epoxy-coated aluminum sash handle. 2.02.08 The sash track shall be epoxy-coated aluminum or steel. 2.02.09 Hood service fixtures (on models with service fixtures) shall feature 1/4" copper tubing with forged brass valves and seats, TFE coated silicone bronze stem and TFE packing. Gas valves shall feature brass service lines. 2.02.10 Sash foil and spill trough shall be 14 gauge epoxy-coated cold- rolled steel. Spill trough shall be 1.25" deep and shall require no cabinet overhang. 2.02.11 Tissue screen shall be 18 gauge epoxy-coated cold-rolled steel and located directly below the exhaust collar. 2.02.12 One plumbing access plate shall be located on each interior side wall. 2.0213 Sash pocket located behind the front panel (on HOPEC IV models) shall be 18 gauge epoxy-coated steel. 2.03 Specific Fabrication Requirements: 2.03.01 Overall exterior dimensional information is as follows: 4 ft. 48" w x 59" h x 32.25" d 5 ft. 60" w x 59" h x 32.25" d 6 ft. 72" w x 59" h x 32.25" d 2.03.02 The bench-mounted laboratory hood with by-pass design shall minimize face velocity fluctuations as the sash is raised or lowered. With the sash positioned six inches above the air foil, the inflow velocity shall not be less than twice the selected full open face velocity nor greater than three times that amount. 2.03.03 Exhaust air volume requirements for the bench-mounted laboratory hoods shall be as described in the table. 2.03.04 The entry cone shall provide the exhaust connection leading from the fume cavity. 2.03.04 Removable front panel shall provide access to electrical wiring and lighting fixtures, where specified on the individual hoods. All services shall be accessible from the front of the hood. Two removable interior access cover plates shall provide access to plumbing. 2.03.05 The air foil shall be provided directly across the bottom of the sash opening to allow the air to bypass underneath and sweep across the work surface and prevent any back flow of fumes from escaping from the front of the hood. The foil shall be at least 4" wide and extend back under the sash to prevent closure of the lower by-pass opening when the sash is in the fully closed position. The air foil shall be perforated with Clean-Sweep(tm) openings that shall pull inflow air from under the air foil so that clean air continually flows over the air foil creating a constant barrier of protection from contaminants. The air foil shall pivot up for cleaning. 2.03.06 The exterior of the hood shall feature a baked on powder epoxy paint applied electrostatically. 2.03.07 The baffle shall be removable or the upper baffle shall tilt up and the low baffle tilt down for cleaning. 2.03.08 The single vertical rising sash shall be counterbalanced by a weight. The sash shall operate smoothly without tilting when raised or lowered from either end and shall remain at rest in any open position. All sashes are framed with extruded epoxy-coated aluminum or steel. A sash stop shall be located at the 18" high sash opening position. The maximum sash opening shall be 29". A 9" high viewing panel above the sash shall provide a 39" viewing height. NOTE: Combination sashes (Type "A") are available on HOPEC IV-designed hoods (consult Labconco). 2.03.09 The hoods shall be equipped without service fixtures or shall be provided with a total of up to 8 service fixtures as required capable of providing hot and cold tap water (flow rate 3.5 GPM or 13.25 LPM at 67 psi at full open, 3.5 turns), natural gas (theoretical flow rate of 71CFM at 100 psi, provides 1095 BTU/Sec at a density of .667 Lbs/CU. FT.), air (theoretical flow rate of 59 CFM at 100psi), vacuum (theoretical flow rate of 6 CFM at 10 psi), nitrogen, argon and low pressure steam. Fixtures are rated at maximum pressure of 200 psi with a working pressure of 125 psi. Coefficient of flow for the valve, Cv=0.43. Services shall be provided through remote -controlled valves and 6-serration hose connectors located inside the fume hood cavity. Services shall be pre-plumbed except for the inlet tubing using 1/4" copper tubing except for the upper right hand fixture shall be 1/4" brass for use with gas. Fixture handles shall be plastic and color coded as well as labeled for the designated type of service. Specialty service fixtures are available upon request including CW gooseneck with and without, as required, vacuum breaker (3/8" lines) and SST valves with 1/4" SST lines for purified water. Other service fixtures shall be available from various valve manufacturers (consult Labconco). 2.03.10 The hood shall accommodate a maximum of 8 ADA-compliant service fixtures, four with control knobs mounted on the corner posts and four with control knobs mounted on supporting base cabinet. 2.03.11 Hoods shall be provided with fluorescent lighting systems (bulbs included) located behind a laminated glass safety shield on top of the hood liner. The fluorescent light assemblies shall be serviceable from outside the fume hood cavity. Hoods shall be provided with an ADA-compliant light switch, ADA-compliant blower switch, and all internal wiring to circuit junction boxes. 4 Foot Hoods - 2 each, 36" 30-watt fluorescent lamps 5 Foot Hoods - 2 each, 48" 40-watt fluorescent lamps 6 Foot Hoods - 2 each, 48" 40-watt fluorescent lamps 2.03.12 Fixtured models shall feature two 115 volt, three wire polarized and grounded electrical duplex receptacles. 2.03.13 Hood rear upper exterior finish panel shall be optional. 2.03.14 Work surfaces (not included with hood) shall be available with 6" x 3" oval epoxy cupsink(s) featuring 1-1/2" drain connection as well as other cutout requirements upon request. 2.03.15 Fire suppression system (not included with hood) is available as an option for installation in the hood's interior (contact Labconco). 2.03.16 Face velocity alarms to monitor hood performance (not included with hood) are recommended and shall be available for factory or field installation. PART 3 - EXECUTION 3.01 Examination 3.01.01 Verify equipment rough-in before proceeding with work. 3.01.02 Coordinate with other trades for the proper and correct installation of plumbing and electrical rough-in and for rough opening dimensions required for the installation of the hood. 3.02 Installation 3.02.01 Install according to manufacturer's instructions. 3.02.02 Install according to standards required by authority having jurisdiction. 3.02.03 Install equipment plumb, square and straight with no distortion and securely anchor as required. 3.02.04 Sequence installation to ensure utility connections are achieved in an orderly and expeditious manner. 3.02.05 Touch up minor damaged surfaces caused by installation. Replace damaged components as directed by Architect. 3.03 Adjusting 3.03.01 Adjust operating equipment, with exception of air moving equipment, to efficient operation for its intended use, and as required by the manufacturer. 3.04 Cleaning 3.04.01 Clean equipment, casework, countertops and all other surfaces as recommended by the manufacturer, rendering all work in a new and unused appearance. 3.04.02 Clean adjacent construction and surfaces that may have been soiled in the course of installation of work in this section. 3.05 Protection of Finished Work 3.05.01 Provide all necessary protective measures to prevent exposure of equipment and surfaces from exposure to other construction activity. 3.05.02 Advise contractor of procedures and precautions for protection of material and installed equipment and casework from damage by work of other trades. 3.06 Demonstration 3.06.01 Provide systems demonstration and demonstrate all equipment operations and functions. APPENDIX - TESTING CRITERIA X.X.X. Reverse Air Flows and Containment - When tested as "As Manufactured" ("AM"), the hood shall provide containment less than or equal to 0.10 ppm when tested per ASHRAE Standard 110-95 and under the conditions specified in section X.X.01 of this specification. X.X.01 Test Criteria: The following test criteria shall apply when determining the "As Manufactured" performance rating. Face velocity: 60, 80 or100 feet per minute ±20% Ambient temperature: 68 to 74 degrees F Test procedures: Labconco test procedure PH-1-86 copies are available upon request from Labconco Corporation, 8811 Prospect Avenue, Kansas City, Missouri 64132 X.X.02 Containment per ASHRAE 110-95 - At a tracer gas release rate of 4 liters per minute, the As Manufactured leakage shall not exceed 0.10 ppm (rating = 4 AM 0.10) X.X.03 Flow Visualization - The following excerpt sections of ASHRAE 110-95 are used to define the As Manufactured test criteria for reverse airflow and exhaust capacity. X.X.03.01 Flow Visualization - Swab a strip of titanium tetrachloride along both walls and the hood floor in a line parallel to the hood face and 6 inches (152 mm) back into the hood. (Titanium tetrachloride is corrosive to the skin and extremely irritating to the eyes and respiratory system.) Swab an 8" (200 mm) circle on the baffle of the hood on centerline and on each side. Define air movement toward the face of the hood as reverse airflow and define lack of movement as dead air space. Swab the work surface, making sure to swab lines around all equipment in the hood. All smoke should be carried to the back of the hood and out. Test the operation of the lower air bypass air flow opening by running the cotton swab under the air foil. Before going on to the next test, move the cotton swab around in the face of the hood. If there is any outfall, the exhaust capacity test should not be made. X.X.03.02 Exhaust Capacity - Ignite and place a 30-second smoke bomb near the center of the work surface, making sure that the hole on the side of the smoke bomb faces into the hood. After the smoke bomb begins to work, pick it up with tongs and move it around in the hood. There should be no visual or odor indications of smoke outside the hood. X.X.04 Installed Performance - Per ASHRAE 110-95, the "As Used" (AU) requirement involves the design of the room supply system and the toxicity of the materials handled in the hood. The AU specification should be tailored to suit the needs of the laboratory room location.