Hemco 92011 User Manual

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Installation, Operation, Maintenance Manual EcoFlow Laboratory Fume Hood Model # s

92011, 92012, 93011,93012,90311, 90312, 90411,90412,

Visit www.HEMCOcorp.com Call Toll Free: (800) 779-4362

HEMCO Corporation 711 S. Powell Road Independence MO, 64056

Phone (816) 796-2900 Fax. (816) 796-3333 Email [email protected]

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The HEMCO fume hoods are shipped palletized, fully crated, padded and wrapped for maximum protection and ease of handling. If damaged call the adjuster for the delivering carrier promptly and notify HEMCO at (816) 796-2900.

• Upon receiving, inspect for crate damage and possible concealed damage that may have occurred in transit. Save all delivery receipts and crating materials. If damaged call the adjuster for the delivering carrier promptly and notify HEMCO at (816)796-2900.

• When uncrating the fume hood remove the band strap, which is securing the corrugate to the pallet.

• When ready to install fume hood, carefully lift from pallet and set on work surface in proper location (see fume hood Installation).

CAUTION: DO NOT lift the fume hood at any time by the airfoil as this will damage the unit.

SITE PREPARATION

A fume hood requires that it be installed on a level surface. If fume hood base cabinets are included with the fume hood installation make sure the ﬂ oor is clean and level.

All service lines for the Fume hood installation, such as water, air, gas, etc. should be purged of dirt, capped and tested prior to connection to the fume hood.

Laboratory fume hoods should be located to avoid cross-currents at the fume hood face due to heating, cooling or ventilation inlets.

Fume hoods should be located away from high trafﬁ c lanes within the lab to avoid air that could draw haz- ardous fumes into the room.

Passing personnel should provide sufﬁ cient aisle space in front of the fume hood to avoid disruption of the work or interference with the operating technician.

Safety devices such as drench showers, eyewash stations, ﬁ re extinguishers, ﬁ rst aid kits and ﬁ re blankets should be located convenient to the fume hood operating personnel and plainly labeled as to their use and function.

In addition, laboratory fume hoods are potential locations for ﬁ res and explosions due to the type of experi- ments conducted in these units. As such, fume hoods should be located so an explosion or ﬁ re within the hood would not impede exit from the lab.

BASE CABINET INSTALLATION

Position the cabinets in the desired location approximately 7 inches from a rear wall or in a suitable island location. Top of the cabinet should be leveled using the adjustment feet on the bottom of the cabinet. If multiple cabinets are involved, bolt together and to existing cabinets or walls and level as one unit.

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Fume Hood Operation

Safety considerations require that a schedule of inspections and documentation be set up for every laboratory fume hood.

An inspection record should be maintained. This record may be in the form of a label attached to the fume hood or a log maintained by the laboratory director or safety ofﬁ cer.

WORK SURFACE INSTALLATION

Once the fume hood base cabinet is installed, apply an adhesive to the top surface of the cabinet. Carefully place work surface on cabinet and make any corrections the position/alignment. Allow adhesive to dry before setting fume hood.

FUME HOOD INSTALLATION

1. Fume hood must be set on a work surface or a ﬂ at level surface, supported by a base cabinet or table. The Fume hood is a lab furnishing and shall NOT be installed in the walls, ceiling or any other structural feature of the building.

Inspection procedures should include instrument veriﬁ cation of fume hood face velocity performance and usage by observations and interview.

Procedures should consist of a physical examination of liner condition and cleanliness, bafﬂ e and sash operation and condition, sash cable and guide wheels, and service ﬁ xture function.

All results should be recorded and reported to the proper authority for any required action. NOTE: Special purpose fume hoods such as those used with radioactive materials or perchloric

acids require additional inspection procedures to cover special equipment and requirements. Options, such as airﬂ ow monitors or other types of monitors should be inspected annually. Fume hood air face velocity is an important consideration. 100 feet per minute (FPM) is the

standard requirement. Velocities in excess of 150 FPM may reduce fume hood performance and create hazardous condition(s).

The establishment of the proper face velocity for a speciﬁ c laboratory fume hood should be based on a number of factors. The nature of the fumes emitted from the hood is of obvious importance.

2. DO NOT lift the fume hood at any time by the airfoil as this will damage the unit.

3. Once the fume hood is in place, service lines can be connected (See Electric and Plumbing).

4. Service panels are provided to allow access for service hookup. Outer service panels are removed by gently prying the inner panel away from the outer trim ring at the clearance spots. Inner service panels are removed by unlocking the locking spline of the rubber sealing gasket creating tolerance to remove the gasket and inner panel. Panels may be set aside for later replacement after the installation is complete. The front access panel above the sash is removable to allow access to the top of the fume hood (pull out on lower edge of upper most panel and push up to remove). The electrical junction box, light ﬁ xture, outlet collar for duct connection,and special plumbing connections, can be accessed / installed from this position.

5. Fume hoods are equipped with a clear acrylic sash. The sash slides in a PVC track that is contoured to the front of the hood. Friction screws are located in the track allowing for adjustment of sash movement.

6. The incandescent light ﬁ xture is factory mounted. NOTE: Bulbs are not provided with the Fume Hood. For those fume hoods with vapor-proof incan-

descent light(s), unscrew the glass globe install bulb and replace globe.

Consult your company safety department for recommendations covering the materials you plan on using.

Cross-drafts, created by the room ventilation system or from an open window or corridor, if located adjacent to the hood, can drastically disturb the ﬂ ow of air entering the fume hood face and even cause a reverse ﬂ ow of air out of the front of the hood. Room conditions such as these should be avoided. The velocity of the cross drafts should not exceed 20 percent of the fume hood face velocity.

Your Laboratory Safety Plan and Company Procedures should combine to create a safe and healthful work environment.

NOTE: In those areas where seismic codes are a consideration, it is recommended that qualiﬁ ed engineers be consulted for necessary installation requirements for seismic codes.

ELECTRICAL

Electrical services supplied with your fume hood are factory mounted wired to junction box on top of the fume hood. Final wiring must be completed by a licensed electrician to comply with local codes.

Supply wiring requirements:

• 20 amperes circuit use 12 gauge wire and 14 gauge ground wire size.

• 15 amperes circuit use 14 gauge wire and 14 gauge ground wire size. It is required that the main junction box be grounded and that an external disconnect device, circuit

breaker, and/or over-current device be located in the power source supply wiring, and be provided in close proximity to the fume hood. This disconnect device shall be marked as the disconnect device for the fume hood and easily accessible.

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PLUMBING CAUTION: All service ﬁ xtures requiring plumbing are normally installed on the fume hood ready for con-

nection to the service outlets. Piping should have a solvent and corrosion resistant ﬁ nish. Piping should be the best material for material being conveyed. Material types are typically copper, stainless steel, black pipe, galvanized pipe, CPVC, and PVC. A certiﬁ ed plumber should be used for all installation. Installation shall be installed in compliance with Local and NFPA Standards.

TROUBLE SHOOTING

PROBLEM CAUSE CORRECTIVE ACTION

Not limited to the following:

• Fuel gases such as manufactured, natural, and LP-Gas – National Fuel Gas Code, NFPA 54, and the Liqueﬁ ed Petroleum Gas Code, NFPA 58.

• Hydrogen – Standard for Gaseous Hydrogen Systems at Consumer Site, NFPA 50A.

• Acetylene, oxygen systems – Standard for Design and Installation of Oxygen-Fuel Gas Systems for Welding, Cutting, and Allied Processes, NFPA 51.

BLOWERS

If your Fume Hood was ordered with an integral blower, it will be mounted on the fume hood. It will be necessary to wire it per local codes. Depending on the types of fumes being exhausted and the length of the ductwork, rigid PVC, ﬂ exible neoprene, sheet metal or stainless ducting must be attached for fume removal.

CAUTION: The maximum length of run of ducting with integral blowers should be 10' or less to minimize static pressure loss.

Remote mounted blowers and ducting requirements other than as speciﬁ ed are site speciﬁ c and require a qualiﬁ ed engineer or installer. The exhaust system and ducting should be protected from corrosion or inherently corrosion resistant.

CLEAN UP

Upon completion of the installation of your fume hood it is a good idea to clean thoroughly to eliminate any miscellaneous debris and/or surface soil.

1. For all composite surfaces use a general-purpose nonabrasive household cleaner.

2. For glass surfaces use a formula glass cleaner. (Windex).

3. For the work surface it is recommended that you use soap and water.

4. For metal cabinet painted surfaces use a general purpose nonabrasive cleaner,

1) Improperly sized blower

2) Motor (impeller wheel) is

Insufﬁ cient air ﬂ ow

Fume Hood or Blower

not operating

Contaminates outside

fume hood face

Sash binding

Air Flow Monitor 6) 7)

running backwards

3) Obstruction in duct system

4) Leaks in duct system

5) Overloaded ﬁ lters

1) Blown fuse or open circuit breaker

2) Defective motor

3) Thermal protector on

4) Motor improperly wired

1) Improper use or procedures

2) External factors

3) Improper face velocity

4) Cable off of pulley Cable Broke

1) Resize blower, change drive package

2) Correct wiring for reverse rotation of motor.

3) Locate and Remove obstruction

4) Trace and repair

5) Clean or replace ﬁ lters

1) Replace fuse or reset circuit breaker

2) Consult factory

3) Check for high or low voltage input or ambient temperatures over 40 degree C ( 104 degree F)

4) Correct wiring for reverse rotation of motor

1) Follow safety guidelines and procedures

2) Check external air ﬂ ow patterns around fume hood

3) Recertify fume hood face velocity and/or duct system

5) Replace Sash / Cable

Any questions? Call HEMCO customer service at (816) 796-2900.

Electrical Services

not working

8) Circuit Breaker

10)Corroded Contacts

9) Check Main Load Center

11)Clean or replace

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SAFETY RECOMMENDATIONS

FUME HOOD OPERATION

Safety considerations require that a schedule of inspections and documentation be set up for every laboratory fume hood.

DO - AVOID UNNECESSARY EX POSURE OF PERSONNEL TO FUMES INSIDE HOOD BY KEEPING SASH CLOSED EXCEPT WHEN LOADING OR UNLOADING HOOD.

DO - KEEP MATERIALS 6" OR MORE FROM FRONT EDGE OF SASH PLANE.

DO - KEEP THE SASH AT DESIGN OPENING WHILE UTILIZING THE FUME HOOD.

DO - CLEAN UP IMMEDIATELY ANY MAJOR SPILLS OCCUR RING INSIDE HOOD.

DO - USE ONLY GROUNDED ELECTRIC EQUIPMENT.

DO - REPORT ANY MALFUNCTION OF THE EXHAUST SYSTEM.

DO - ELEVATE CONTAMINATES AND EQUIPMENT ABOVE WORKSURFACE OF HOOD ENABLING AIR FLOW BE NEATH AND AROUND.

DO - KEEP MOVEMENTS IN THE HOOD AND IN FRONT OF THE HOOD TO A MINIMUM.

DO NOT - USE HOOD UNLESS EXHAUST SYSTEM IS IN OPERATION.

DO NOT - CHANGE DAMPER OR BAFFLE SETTINGS AFTER INITIALLY SET.

DO NOT - USE FUME HOOD FOR STORAGE OF CORROSIVE OR VOLATILE MATERIALS.

DO NOT - BLOCK BAFFLE OR GRILL OPENINGS.

DO NOT - GENERATE LARGE QUANTITIES OF INFLAMMABLES WITHIN THE FUME HOOD.

DO NOT - PERMIT TEMPERATURES OF SASH GLASS TO EXCEED 160 DEGREES FAHRENHEIT.

DO NOT - PLACE UPPER BODY OR HEAD INSIDE THE FRONT PLANE OF THE HOOD OPENING.

DO NOT - OPEN OR CLOSE SASH SWIFTLY AS THIS MAY CAUSE ADVERSE AIR FLOW CURRENTS.

DO NOT - APPROACH OR LEAVE HOOD FACE SWIFTLY AS THIS MAY CAUSE ADVERSE AIR FLOW CURRENTS.

An inspection record should be maintained. This record may be in the form of a label attached to the fume hood or a log maintained by the laboratory director or safety ofﬁ cer.

Inspection procedures should include instrument veriﬁ cation of fume hood face velocity performance and usage by observations and interview.

Procedures should consist of a physical examination of liner condition and cleanliness, bafﬂ e and sash operation and condition.

All results should be recorded and reported to the proper authority for any required action. NOTE: Special purpose fume hoods such as those used with radioactive materials or perchloric

requirement. Velocities in excess of 150 FPM may reduce fume hood performance and create hazardous condition(s). The 100 FPM may be at different sash height positions depending on the duct length and fan size.

The establishment of the proper face velocity for a speciﬁ c laboratory fume hood should be based on a number of factors. The nature of the fumes emitted from the hood is of obvious importance. Consult your company safety department for recommendations covering the materials you plan on using.

Your Laboratory Safety Plan and Company Procedures should combine to create a safe and healthful work environment.

DO – CHECK FUME HOOD FACE VELOCITY ON A REGULAR SCHEDULE.

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MAINTENANCE

SASH

Standard fume hoods are provided with a type of movable sash or viewing window. The sash should be cleaned frequently to avoid the possibility of residue building up on the surface. A soft, cloth and mild cleaner should be used for best results.

BLOWER INSPECTION

It is recommended that both the blower motor and blades be periodically inspected. Belt wear, blade corrosion and exhaust port clogs are examples of blower problems that can develop over long-term use.

THE ROOM MAKE-UP AIR DELIVERY SYSTEM

FUME HOOD

Cleaning of fume hoods should include the removal of the bafﬂ e for full cleaning of interior surfaces. Spills should be ﬂ ushed immediately using neutralizing compounds as required and cleaned thoroughly after- wards. General cleaning can be done with mild detergents and water.

CABINETS

Although designed for wear and tear, the life of cabinets can be greatly extended through observance of proper cleaning and maintenance procedures. Drawers that are overloaded, doors misadjusted, and locks which malfunction can lead to undue stress on equipment, and can permanently affect performance. Metal casework and hardware should be cleaned periodically with good quality cream furniture Polish or an automotive cleaner and ﬁ nishing wax. Use of rubbing compound often can restore superﬁ cial abrasions. Spills should be cleaned up immediately followed by a wash down with detergent and water.

Corrosive reagents should be stored in well ventilated casework speciﬁ cally designed for corrosive storage. HEMCO offers a complete line of acid/corrosive cabinets and ﬂ ammable/combustible cabinets.

WORKSURFACES

Epoxy Resin - Fine scratches will usually disappear when the top is cleaned with a good quality liquid furniture polish. Mildly abrasive cleaners can be used for stain removal.

Make-up air is a ventilation term describing the bringing in of outdoor air to “supply” the building with air removed by the exhaust ventilation system, creating a balance. In general, laboratories require eight – twelve total volume changes per hour. Special applications may require up to 20 air changes per hour. Make-up air is necessary in any lab with an operating fume hood. A sufﬁ cient quantity of make-up air must be available to allow fume hoods to develop required face velocities. Consideration must be given to the make-up air required for air changes in each speciﬁ c laboratory involved.

DUCTING

Ducting should be checked periodically for possible leaks.

FACE VELOCITY - CALIBRATION

Fume hood face velocity should be checked at a minimum annually, recommend checking face velocity biannually and the ﬁ ndings recorded and compared with previous readings. Signiﬁ cant changes in face ve- locity should be reported and investigated. Changes in face velocity may be caused by supply air changes, exhaust blower problems, or loose, broken, corroded, or blocked ducting. Recommended test protocol is at a minimum the face velocity and smoke visualization sections of the ASHRAE 110 – 1995 or current test procedure.

SERVICE FIXTURES

Fixtures which have been subjected to chemical fumes over a prolonged period of time may show signs of corrosion. When this occurs thorough cleaning with formulated chrome cleaner followed by an application of paste wax is recommended.

Epoxy-coated ﬁ xtures used in chemical areas can be cleaned with detergent and water, dried, and lightly polished with a soft cloth. Do not use abrasive cleaners. High temperatures may alter the color of the plastic coating on ﬁ xtures; this condition cannot be cleaned away, but the chemical resistance of the ﬁ nish is un- changed. A break in the plastic coating of these ﬁ xtures should be touched up immediately with matching paint or lacquer to protect the ﬁ xture.

BLOWER LOCATION AND SIZE

Where the building design permits, the exhaust blower should be located on the roof of the building to provide a negative pressure in the portion of the duct system located within the building. The exhaust blower should be sized to exhaust the volume of air necessary to attain the selected fume hood(s) design face velocity at the total system static pressure loss. Blower should also be sized to achieve the lowest practical rotational speed thereby minimizing noise/vibration.