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Flammable Storage
Refrigerators & Freezers
Overview
Conventional refrigerators and freezers are not suitable for storing
flammable materials. Such units have components in their electrical
and refrigeration systems that can trigger explosion of flammable air-
vapor mixtures inside the unit.
Flammable Materials Storage (FMS) refrigerators/freezers are
designed for use in locations, which are not classified by the Authority
Having Jurisdiction (AHJ) as hazardous. Under normal operating
conditions the build up or presence of flammable vapors will not occur
in the environment external to the unit.
FMS units are NOT designed for use in Class I, Division 1,
Group C and D environments, which require an Explosion- Proof
Refrigerator/Freezer.
(FMS units are designed and evaluated by Canadian Standards
Association (CSA) to meet the requirements of the National Fire
Protection Association Standards Nos. 45, 70 and 99. These units have
no internal electrical components that could trigger an explosion or fire
of hazardous materials inside the unit).
All models have heavy-gauge, rigid, steel construction with a durable
enamel finish. The interior cabinet of this unit is constructed of epoxy-
coated steel. Care must be exercised when determining which
chemicals may be stored in the refrigerator and freezer sections and
which type of storage materials should be employed.
WARNING : For FMS and EXP 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).
Thermocouples for building monitoring systems 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 the end user's responsibility to meet these requirements. VWR
cannot assist with the selection of devices, recommend, approve or
design any device or monitoring circuit.
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