Brochure

2-116.7
11
A. Standards
A.1.a. Units shall be UL and C-UL listed for safe operation,
construction, and performance. Units shall be listed for
use in both the U.S. and Canada for commercial and
industrial installations. (Models HER, VE, and PTE)
A.1.b. Explosion proof units, model HEX5 shall be UL listed and
CSA certified for use in the following hazardous areas:
 •ClassI,Divisions1&2,GroupsC&D
 •ClassII,Division1,GroupsE,F&G
 •ClassII,Division2,GroupsF&G
 •ClassI,Zones1&2,GroupIIA&IIB
Units shall be rated for National Electrical Code and
Canadian Electrical Code Temperature Code T3B 165°C
(329°F).
B. Mechanical Configuration
B.1.a. Heater shall be a Modine model HER horizontal air
delivery electric unit heater of the size, capacity, and
voltage as listed in the equipment schedule.
B.1.b. Heater shall be a Modine Power-Throw
TM
model PTE
horizontal air delivery electric unit heater of the size,
capacity, and voltage as listed in the equipment schedule.
B.1.c. Heater shall be a Modine model VE vertical air delivery
electric unit heater of the size, capacity, and voltage as
listed in the equipment schedule.
B.1.d. Heater shall be a Modine model HEX5 horizontal air
delivery electric unit heater of the size, capacity, and
voltage as listed in the equipment schedule.
C. Unit Casing
C.1. Unit shall have a steel casing that is treated for corrosion
resistance and painted with an electrostatically applied,
baked on, gray-green polyester powdercoat paint finish.
(Models HER, VE, and PTE)
C.2.a. Model HER unit shall have a squared corner casing and
the top shall have two threaded holes (3/8" - 16 TAP) for
threaded rod suspension. The bottom of casing shall
have a hinged panel for service access to wiring and
controls.
C.2.b. Model PTE unit shall consist of two circular steel covers
bolted together with the heating element supports. The
air discharge side cover shall have a die-formed fan
venturi. The back cover shall have a depression for
motor mounting with openings for cooling-air circulation
for the motor. Four hanging brackets shall be provided
for use with 5/8” diameter suspension rods.
C.2.c. Model VE unit shall consist of two circular steel covers
bolted together with the heating element supports. The
bottom cover shall have a die-formed fan venturi. The
top cover shall include an inner cone for motor mounting
and to provide a heat shield from radiant and convective
heat from the heating elements.
C.2.d. Model HEX5 shall be fabricated from 14 gauge steel
with a baked epoxy powder coating over a 5-stage
pretreatment including iron phosphate, for protection from
corrosive atmospheres. The cabinet shall include two (2)
9/16” mounting holes located on the top.
D. Heating Elements
D.1.a. Elements shall consist of a nickel-chromium resistance
wire surrounded with magnesium oxide and sheathed in
steel spiral-finned tubes. Elements shall have kilowatt
rating as listed in the equipment schedule. (Models HER,
VE, and PTE)
D.1.b. The heat exchanger shall be fluid-to-air type consisting
of steel tubes with roll-formed aluminum fins and
be vacuum charged. The heat exchanger shall be
protected by a preset 100 psig (690 kPa) pressure-relief
valve, aluminum body, no serviceable parts. The heat
exchanger shall be filled to design level with a custom-
blended, long-life solution of ethylene-glycol, water, and
corrosion inhibitors. The heat exchanger shall have three
heavy-duty immersion heating elements brazed into a
heavy steel bulkhead. The elements shall consist of
high-quality resistance wire embedded in a compacted
magnesium oxide refractory and sheathed in metal
tubing. The heater is to be protected by a snap-action
bimetal temperature high-limit, which shall not be affected
by altitude or changes in atmospheric pressure. The
high-limit shall be an automatic reset type, and will shut
off the heater if the exchanger temperature rises due to a
lack of heat dissipation.
E. Motor and Propeller Fan
E.1.a. Each unit shall have a single 208-230V/60Hz/1ph motor.
The motor shall be totally enclosed, continuous-duty,
with automatic resetting, thermal-overload protection.
Propeller fan shall be directly connected to the motor
shaft and be statically balanced. The motor shall be
mounted to the unit with rubber vibration absorbing
material. (Models HER, VE, and PTE)
E.1.b. Each unit shall have a ball bearing, permanently
lubricated, thermally protected explosion-proof motor
rated for continuous duty. The fan blades shall be
aluminum to prevent sparking. Propeller fan shall be
directly connected to the motor shaft and be statically
balanced. The fan shall be shielded with a heavy-duty
epoxy coated guard of two piece construction to provide
easy maintenance and cleaning of the fan and motor.
The guard shall not allow a 1/4" or larger probe to enter.
(Model HEX5 only)
F. Electrical
F.1. All units shall have built-in contactors and control circuit
transformers (where required) to provide single-source
power connection.
F.1.a. Models VE and PTE, sizes 300 through 500 shall have
two sets of contactors to provide for two-stage operation.
F.1.b. Model HEX5 shall have a contactor coil that is
encapsulated severe duty and separately fuse-protected.
F.2. Fuse blocks and factory-supplied fuses shall be installed
on all models except HER 30, 50, and 75 with 208 volt
or 230-volt single or 3-phase power supply. A wiring
diagram and grounding lug shall be included in each
control compartment.
F.3.a. Transformers shall be factory installed on all models with
460 volt, 3 phase power supply to permit 230 volt motor
operation. (Models HER, VE, and PTE)
F.3.b. Transformers shall be factory installed on all HEX5
models with the primary voltage being the same as the
heater voltage and the secondary being 120V grounded
circuit.
F.4. Electrical control components shall be safely enclosed
in a separate junction box. A wiring diagram and a
grounding lug shall be included in each power junction box.
F.4.a. The Model HEX5 control center shall be enclosed in an
explosion-proof control enclosure with a large threaded
cover for easy access. The control center shall include
a printed circuit board with a terminal block for room
thermostat connection and in-line fuse protection, with
both an operating fuse and a spare fuse.
F.5. (opt) The HEX5 heater shall be supplied with a built-in
explosion-proof room thermostat mounted on the control
enclosure side of the heater.
G. Air Deflectors
G.1.a. Adjustable horizontal air deflectors shall be furnished.
(Models HER and PTE)
G.1.b. Louvers shall be individually adjustable and made of
anodized extruded aluminum. (Model HEX5)
SPECIFICATIONS - ALL MODELS