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C.
OPERATION
C.1 General
1.
To operate heater, ensure power supply is properly
connected as specified in the wiring schematic (refer to
Figures 2A – 2F, page 5 – 7).
2.
If unit is equipped with an optional thermostat, ensure the
thermostat is set above the ambient temperature.
3.
If unit is equipped with the optional “fan only” switch, ensure
the switch is in the “
ON
” position. Note: If the switch is in
the “
FAN ONLY
” position, only the fan will energize, not the
heating elements.
4.
During normal operation, the thermal cut-out control should not
cycle the heater ON and OFF. If cycling occurs, check to see
if there is an airflow blockage. If there are no obstructions, the
heater must be examined by qualified personnel to determine
the cause of the thermal cut-out cycling.
5.
Operate the unit for a minimum of 10 minutes to allow the
heating elements to reach a steady state. If no warm air is
discharged from the heater, shut off the unit and see the
Section F. Troubleshooting Tips, page 11.
D.
REPAIR & REPLACEMENT
WARNING
WARNING.
Disconnect heater from power supply at
disconnect or fuse box before opening enclosures or
servicing heater.
Lock the switch in the
“OFF”
(open) position and tag
the switch to prevent unexpected power application.
This heater should only be serviced by qualified
personnel with electrical heating equipment experience.
Install and use the heater in accordance with local
codes and this manual.
NOTE: ONLY USE FACTORY SUPPLIED REPLACEMENT PARTS
OF THE SAME SPECIFICATION. REFER TO TABLE 3 – PARTS LIST:
HEATING ELEMENTS, PAGE 10 FOR COMPLETE LISTING OF
AVAILABLE PARTS.
D.1 Heating Elements
1.
Disconnect all wires connected to the heating element
terminals. Remove louver assembly from heater. Remove
heating elements, noting their proper placement.
2.
Install factory-supplied replacement heating element (see
Table 3 – Parts List: Heating Elements, page 10).
2.1
Ensure heating element attaching screws are in good
condition.
2.2
Re-attach heating element mounting screws and
tighten.
2.3
Check heating elements are not in contact with the
cabinet or each other.
3.
Reinstall all wires with hardware provided. Torque the
element terminal hardware to the torque specifications,
refer to Table 5 – Recommended Torque Specifications,
page 12.
4.
Reinstall the louvers.
D.2 Fan
1.
Remove the rear grille. Remove the screw securing the fan
to the fan hub attached to the motor.
2.
Replace fan with factory-supplied fan. Install the fan such
that the “spider” of the fan faces the inside of the heater, i.e.
facing towards the elements.
D.3 Thermal Cut-Out
1.
Disconnect all wires connected to thermal cut-out.
2.
Remove two mounting screws.
3.
Remove thermal cut-out switch from the enclosure.
4.
Replace thermal cut-out with factory-supplied replacement
thermal cut-out.
5.
Reinstall thermal cut-out switch in the control enclosure.
6.
Re-attach thermal cut-out mounting screws.
7.
Reconnect all wires to thermal cut-out.
HEATER
CABINET
PANEL
ELEMENT
TERMINAL
HARDWARE
ELEMENT
MOUNTING
HARDWARE
HEATING ELEMENT
Figure 3 – Heating Element Assembly
