4 | Explosion-Proof Refrigerators & Freezers
GP, Explosion-Proof and FMS Lab Refrigerators and Freezers
Explosion-Proof Refrigerators &
Freezers
Conventional refrigerators and freezers are not suitable for
storing flammable materials. Such units have components in
their electrical and refrigeration systems that can trigger
explosions of flammable air-vapor mixtures inside the unit
and/or in the immediate surrounding area.
The Authority having Jurisdiction (AHJ) determines if work
areas are designated as a hazardous location with respect to
the presence of flammable gases or vapors. Such locations
are defined in (National Fire Protection Association) NFPA 70
Articles 500-501 and OSHA 29 CFR1910.307. Some of these
classified areas are expected to experience concentrations of
flammable gases and/or vapors at or above their lower
flammability limits for extended periods of time. The
construction of our explosion-proof units has been evaluated
by Underwriters Laboratories (UL) are suitable for use in
classified areas requiring Class I, Groups C and D
1
protected
equipment.
The electrical components such as thermostats, wiring,
splices, relays and compressor motors on explosion-proof
units are safely housed within explosion-proof enclosures and
conduit. Compressor surface temperatures have been
evaluated and determined to remain below the flash point of
materials found in Class I, Groups C and D. All models have
heavy-gauge, rigid, steel construction with a durable enamel
finish. Interiors have epoxy coated steel construction. Each
unit is insulated throughout for energy-efficient operation.
These units are ideal for storing ethyl ether, acetone, alcohol,
benzene, gasoline, hexane, lacquer solvent vapors, naphtha,
along with many other potentially hazardous materials.
WARNING:
For Explosion-Proof units where
flammable materials are stored in the cooling
chamber, the cooling chamber is considered a
Class I Div1 or Class I Zone 1 hazardous
location. Any monitoring devices placed in the
cooling chamber must have an intrinsically safe
rating from an appropriate certification body,
such as UL, CSA, FM etc. (this includes battery
or solar powered devices).
If you wish to use thermocouples for building monitoring
systems, they must be wired through an electrical barrier
designed to provide isolation against voltage and current
spikes, which could cause a spark resulting in fire or
explosion. It is your responsibility to meet these requirements.
VWR cannot assist with the selection of devices, recommend,
approve or design any device or monitoring circuit.
MODEL 20EREEVWA (Refrigerator) &
20EFEEVWA (Freezer)
Features:
•
34" Wide
•
Overall 20.9 Cu. ft.
•
Four shelves (non-adjustable)
•
One sheet metal shelf
•
Manual defrost
•
Epoxy coated steel interior
•
White color
Model
Total Vol.
Cu. Ft.
Exterior Dimensions
H x W x D inches (cm)
20EREEVWA
20.9
73.13" x 34" x 35.81"
(185.7 x 86.4 x 91.0 cm)
20EFEEVWA
20.9
73.13" x 34" x 35.81"
(185.7 x 86.4 x 91.0 cm)
Model
Electrical
Characteristics
Volts/Hz, Amps
Temp. Range
°F (°C)
20EREEVWA
115V/60Hz, 5.0
34˚ to 54˚
(1˚ to 12˚)
20EFEEVWA
115V/60Hz, 5.0
-4˚ to 10˚
(-20˚ to -12˚)
Note:
Amps listed are at normal run mode, starting amps
may be higher.
Explosion-Proof units require being hard wired into the
building electrical system and therefore require a qualified
electrician to install as per the “local electrical requirements
and NEC 70 Standard” or “Canadian Electrical Standard”.
Note:
If any questions pertaining to electrical safety arise,
please refer to article 501 of the US National Electrical Code.
1. The notation Class 1, Groups C and D is an accepted abbreviation for Class I Div 1, Groups C and D; Class I Zone 1 Group IIB.
