Dexon Canada Air Systems Inc
OWMDH Series Use Manual
Version 07.2019
Page 8
4.1 INSTALLATION REQUIREMENTS
Status board must be installed in a suitable enclosure remote from hazardous locations in
accordance with local electrical codes.
Class 1, Div. 2 units must be fused remote from hazardous locations.
We recommend a pressure relief vent/gooseneck at least equal in cross section to the
discharge outlet.
Ensure the pressure relief vent/gooseneck is not in close proximity to the blower heater louvers.
Maintain 205mm (12”) clearance to the bottom of the intake louvers for accumulating debris or
drifting snow.
Maintain a minimum of 1 meter
(3’3”) clearance on control access side of the blower heater for
maintenance and servicing.
4.2 INSTALLATION INSTRUCTIONS
All installations must be done by qualified personnel and in accordance with local electrical codes.
1. If through the wall (back air outlet) is used cut a rough opening for air outlet as per dimensions
diagram provided allowing enough space between the ground and the unit for ducting,
transitions or off sets. Through-wall lining and insulation supplied by others and installed by
others as required.
2. The unit may be secured to the wall with the four wall mount brackets supplied.
3. If not pre- mounted, install the status board in a suitable enclosure in a non-hazardous dry
location.
4. Run separate conduits; one for the status board cable and one for the appropriate heating and
control power circuits.
4. INSTALLATION
IMPORTANT: The blower heater must run continuously. NOT all components in the unit
are corrosive resistant and rely on the continuous positive pressure of the unit to keep
the damaging moist and corrosive gases from entering the blower heater. If the blower
heater cannot be immediately started or run continuously, on site actions must be
taken to prevent corrosive gases and moisture from entering the blower heater.
.
CAUTION:
Do NOT install status board cable in the conduit intended for heating element and
power circuits. Doing so will put the extra low voltage circuits in close proximity to low voltage
circuits which may cause signal interference.
