Brochure

2-116.7
5
➀ Epoxy coated 14 gauge steel cabinet contains heater
core, motor, and fan assembly. All fasteners are plated for
corrosion protection.
➁ Adjustable extruded aluminum louvers allow directional
control of airflow.
➂ Liquid to air finned tube heat exchanger core. An
Ethylene Glycol and water solution is used as the heat
transfer fluid, providing freeze protection to -49°F (-45°C).
A pressure relief valve protects the core from overpressure
damage. Heaters are UL Listed for Class I, Divisions 1 & 2,
Groups C and D, and Class II, Division 1, Groups E, F and
G, and Class II, Division 2, Groups F and G. UL temperature
code shall be T3B 329°F (165°C) for Class I and II, indicating
maximum operating surface temperatures. Refer to page 3
for additional details.
➃ Low watt density metal sheathed immersion type heating
elements in the liquid filled lower tank feature a Teflon® liner
to keep elements away from outer surfaces. (Teflon® is a
registered trademark of E.I du Pont de Nemours & Co.).
➄ The core is easily removable through the bottom of the
heater for ease of service.
➅ Automatic reset, bimetal, high-limit provides over
temperature protection and is rated for 100,000 cycles
of service.
➆ Factory wiring to tin plated copper bus bars for effective
handling of high current flow.
➇ Outer protective cover protects against high surface
temperatures.
➈ Threaded explosion proof covers on junction boxes.
➉ NEMA Type 7 & 9 enclosures with large, heavy-duty
aluminum data plate houses the built-in control transformer,
convenient terminals for 120V room thermostat wiring
connection, load carrying contactor with severe duty coil, and
fuse protection for contactor coil, including a spare fuse in a
convenient holder.
Narrow gap two-piece safety fan guard shields all moving
parts.
Heavy gauge embossed fan blades.
Optional factory installed explosion proof thermostat.
Factory wired motor connections with copper conductor
wires enclosed in steel conduit. Conduit is reverse threaded
for easy motor removal.
Thermally protected, automatic reset explosion-proof
motor
DESIGN FEATURES - EXPLOSION-PROOF MODEL HEX
Teflon® is a registered trademark of E.I du Pont de Nemours & Co.
Figure 5.1 - Model HEX Controls and Features
Features
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