US Products Catalog 2015-2016 •
64
OHX
Explosion-Proof Unit Heater
Color
• Standard: red.
Finish
• Standard: epoxy/polyester powder paint.
Voltage
• 208V, 240V, 480V, 600V, 1 or 3-phase.
Construction
• 14-gauge steel cabinet.
• Adjustable anodized aluminum louvers.
• Cast aluminum control and element enclosure lids NEMA Type 7 and 9
with O-ring.
1
• Fan Guard: multiple horizontal stiffening wires.
2
Protection
• High temperature pressure relief device.
3
• Two high-limit temperature controls: one with automatic
reset and one with manual reset.
Fan
• Explosion-proof, thermally protected, permanently lubricated
ball bearing motor.
4
• 5 to 20kW: 1/4 HP, 1725 rpm.
• 25 to 35kW: 1/2 HP, 1725 rpm.
Temperature code
• 5 to 30kW: T3B 165 °C (329 °F) Class I and II.
• 35kW: T3A 180 °C (356 °F) Class I and II.
Heat exhanger
• High grade metal-sheathed elements fins
with ethylene glycol/water solution.
• Long-life, low watt density.
• Evacuated and sealed, carbon steel tube core
with 10 aluminum fins per inch.
• Division System: 5 to 30kW = T3B 165 °C (329 °F),
35kW = T3A 180 °C (356 °F).
• Zone System T3 200 °C (392 °F).
Control
• 120V control (standard).
5
• Optional 24V control.
• Optional built-in or wall thermostat.
• Optional thermostat guard.
• Optional disconnect switch.
Installation
• Accessories available.
Warranty
• 3-year warranty against defects.
Application
• Paint room, petrochemical plant, refinery, chemical plant,
mining industry, sawmill.
Consult the Electrical Code in your area before installing this unit.
Features
1
2
3
4
5
Front view
with built-in thermostat
Rear view with built-in
thermostat and disconnect switch
OHX-MB
Basic Mounting Bracket
Suitable for applications where
the support arm can be bolted or
welded directly to structural steel
or concrete.
OHX-MM
Wall Mounting Bracket
For use in buildings that have
substantial walls. The Z sections provide
additional support where necessary.
OHX-MS
Hanging Mounting Bracket
Ideal and economical if adequate
overhead structure exists. Requires
1/2
in. (12.5 mm) pipe, cut and threaded
(min. Sch. 40) not supplied.
OHX-MT
Pipe Mounting Bracket
For buildings with insufficient strength
to use other types of mounting brackets.
Requires 3 in. (75 mm) pipe (3
1/2
in.
[87.5 mm] O.D., min. Sch. 40) not supplied.
Atex/IECEx approuved explosion-proof unit heater
also available, see AHX series at
3
I
N
D
U
S
T
R
Y
L
E
A
D
I
N
G
W
A
R
R
A
N
T
Y
I
N
D
U
S
T
R
Y
L
E
A
D
I
N
G
W
A
R
R
A
N
T
Y
YEARS
