Explosion-Proof Refrigerators and Freezers
4
Installation and Operation Manual
Explosion-Proof & FMS Refrigerator-Freezers
Explosion-Proof Refrigerators
and Freezers
Overview
Conventional refrigerators and freezers are not only unsuitable
for storing flammable materials; they can create potential
hazards in a facility. Such units have several components in
their electrical and refrigeration systems that can trigger
explosions of flammable air-vapor mixtures inside the unit or
from the immediate surrounding area.
VWR Scientific offers the largest explosion-proof selection in
the industry, including single and 2-door upright refrig-
undercounter refrigerators.
Motors and thermostats are designed to prevent the arcing
which can ignite a flammable air-vapor mixtures, In addition,
each unit has wiring, splices, a thermostat, a relay and a
compressor motor safely housed within an explosion-proof
enclosure of construction suitable for use in Class I, Groups C
and D. This means that things like the surface temperature of
compressors will remain below the flashpoint of any flammable
material likely to be found in Class I, Groups C and D,
Class I Zone 1 and Group IIB locations.
All models have heavy-gauge, rigid, braced-steel construction
with a durable enamel finish. Interiors have epoxy enamel or
ABS plastic construction. Each unit is insulated throughout for
energy-efficient operation.
These VWR Scientific units will prevent potentially destructive
explosions in any facility by meeting the standards established
by Underwriters’ Laboratory, Inc., OSHA and National Fire
Protection Association for storage of hazardous materials.
Explosion-proof models are specifically designed and
engineered to prevent the triggering of an explosion inside or
outside of the unit in a Class I, Groups C and D hazardous
material environment. These models feature stainless steel
refrigeration components that are more resistant to attack from
corrosive vapors than are aluminum or epoxy-coated
aluminum.
It is important to note that Explosion-Proof models must
be connected to the power supply source by rigid metal
conduit or mineral-insulated cable with proper fittings suit-
able for Class I, Groups C and D hazardous locations.In
addition, the wires inside the conduit must be sealed.
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