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FIN-PRC003-EN16
Mechanical
Specifications
Model EWFB
Heating Elements: Element(s) consist of
high quality nickel chromium alloy
resistance wire embedded and
completely surrounded by magnesium
oxide, enclosed and swaged in an
aluminum sheath. Aluminum fins are
mechanically bonded to the sheath for
efficient heat transfer. The element
fin temperature will not exceed
330°F (166°C) to help assure long
element life. The heating element is
center anchored and free floating at each
end on nylon bushings for quiet
operation.
Thermal Overload: A full length tubular
automatic reset thermal overload
disconnects the heating element(s) in the
event normal operating temperatures
are exceeded.
Volts/Phase: All models available in the
following volts and phase 208/1, 240/1,
277/1 or 120/1.
Control Options: Built-in thermostat and
disconnect are rated for 20 amps, 120-
277 VAC. Transformer relay are rated 25
amp, 120-277 VAC and power relays
rated for 18 amps. They are factory
installed with one device per junction
box or a 6" (152 mm) long or 12" (305
mm) long control section can be used
due to the heaters size or more than two
controls are required per heater.
•
ITS – Single pole thermostat, 20 amp,
is adjustable thru discharge grille
factory mounted and wired in left hand
junction box.
•
ITD – Double pole thermostat, 20 amp,
is adjustable thru discharge grille
factory mounted and wired in left hand
junction box.
•
IDS – Double pole disconnect switch,
20 amp, is adjustable thru discharge
grille factory mounted and wired in
right hand junction box.
•
ATR – Transformer relay single pole,
rated 25 amp 120-277 VAC contacts
rated up thru 277 volt and must be
specified. Coils are 24 volt and 120 volt
and must be specified.
•
PR 208/24, 18 amp power relay
contactor.
•
PR 240/24, 18 amp power relay
contactor.
•
PR 277/24, 18 amp power relay
contactor.
•
ATR – Transformer relays and all
PR-power relays require a control
section and a 12" (305 mm) long
extended enclosure for installation.
Watts/Foot
Watts Per Foot Watts Per Foot
Models (Single Element Heaters) (Double Element Heaters)
DBT & 93, 125, 141, 188, 250 & 282 282
RDBT
DBF & 93, 125, 141, 188 & 250 None
CB
DBCF & 93, 125, 141, 188, 250, 282, 282, 376, 438 & 500
ASHDB 333 & 375
DBCT 93, 125, 141, 188, 250, 282, 282, 376, 438, 500, 564, 625,
333 & 375 666 & 750