GENERAL
The air heaters are designed for comfort heating and should
not be used in ambient temperatures exceeding 104ºF (40ºC).
The units may be wall, pole or ceiling mounted. They utilize a
hermetically sealed, liquid-to-air heat exchanger containing
immersion type electric heating elements. A mixture of
nontoxic propylene glycol and water is place in the heater core
to act as a heat transfer fluid. The propylene glycol provides
freeze damage protection to -49ºF (-45ºC). The unit is
designed to give years of safe, trouble-free operation when
properly installed and maintained.
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INSTALLATION
A.
Site Selection:
The Heaters should not be mounted close to drapery or similar
materials which could lay on the cabinet, or block the inlet or
outlet of the heater. The heaters are intended for elevated
mounting locations so that they blow warm air down to the
floor area. A mounting height should be selected so that the
heater is out of the way of possible moving equipment or
personnel, yet low enough to deliver warm air to the selected
area. See mechanical installation instructions for
recommended installation heights.
B.
Mechanical Installation:
Once an acceptable location has been determined, follow these
instructions to complete the mechanical installation.
1.
The Heaters are designed for use only while permanently
mounted in an upright, level position. See figure below
maximum tilt angles:
2.
To ensure proper heating of floor surfaces, observe the
following recommended maximum mounting heights (to
bottom of heater):
Maximum Mounting Height from Floor:
DX-233-CA DX
-233-CB DX-233-CC
9 ft.
10 ft.
13 ft.
(2.7m) (3.0m) (4.0m)
3.
The supporting structure that the heater is attached to
must have adequate strength to safely support the heater
and be sufficient to keep the heater in its proper upright
operating position. The maximum unit weights are:
MODEL lbs
(kgs)
DX-233-CA 150
68
DX-233-CB 200
91
DX-233-CC 250
114
4.
See figure below for minimum installation clearances:
5.
The heater may be suspended from overhead beams or
mounted to a side wall or a 4" pipe using one of the
approved mounting kits. Use of non-approved mounting
kits voids all warranties, expressed or implied.
6.
Wall mounting should be to structural steel. If the wall
construction is plasterboard with wooden 2 X 4 framing
or similar, it must be reinforced with angle iron or
wooden cross braces.
7.
Lock washers should be used on all mounting nuts and
bolts to ensure they don’t vibrate or work loose due to fan
vibration or other vibration transmitted to the heater.
C. Electrical Installation:
Follow these instructions to complete the electrical
installation:
1.
External branch circuit protection is required. See
nameplate ratings and follow Code recommendations.
2.
Use only an approved explosion-proof means of wiring,
such as mineral insulated cable or copper conductors in
rigid conduit with conduit seals as required to make
connection to the heater.
3.
Follow the NEC and/or CEC and any local electrical and
building codes related to the installation and intended use
of the heater in an explosion-hazard area.
4.
When doing any work on a heater, including the initial
electrical connection, disconnect the electrical current at
the main branch circuit switch, and lock the switch in the
off (open) position and tag the circuit "Out for
Maintenance" to prevent potential lethal shock hazards.
5.
Confirm that the electrical power supply matches the
nameplate voltage, phase, amperage and frequency rating
of the heater to be connected.
6.
Ensure conductors are of appropriate gauge size. The
minimum gauge is stamped on the nameplate. Size all
input conductors according to accepted standards
