Flammable Materials Storage Refrigerators and Freezers
6
Installation and Operation Manual
Thermo Scientific Laboratary Referigerators and Freezers
3 Flammable
Materials Storage
Refrigerators and
Freezers
3.1 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 explosions 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. (Commonly known as “Ordinary Locations”)
FMS units are NOT designed for use in Class I, Groups C and D
environments, which require an Explosion-Proof Refrigerator/Freezer.
FMS units are designed and evaluated by Underwriters Laboratories (UL) 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.
These units are ideal for storing cyclopropane, ethyl ether, ethylene, acetone,
alcohol, benzene, butane, gasoline, hexane, lacquer solvent vapors, naphtha,
natural gas or propane along with many other potentially hazardous
materials.
All models have heavy-gauge, rigid, steel construction with a durable enamel
finish. Interiors have epoxy enamel or ABS plastic construction. Each unit is
insulated throughout for energy-efficient operation.
