8
O
p
er
at
io
n
, R
ep
ai
r &
R
ep
la
cem
en
t
C.
OPERATION
C.1 General
1.
To operate heater, ensure power supply is properly
connected as specified in the wiring schematic (refer to
Figures 3A – 3G, page 5 –7).
2.
If the heater is setup to operate on a thermostat, ensure
the temperature set point is set high enough to turn on
the heater
3.
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.
4.
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
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, 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, page 10 for Parts List).
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 4, page 11.
4.
Reinstall the louvers.
D.2 Fan
1.
Remove the rear grille. Remove the motor mount
assembly. 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 mounting hub collar of the fan faces the inside of
the heater, i.e. facing towards the elements. Ensure motor
shaft end is flush to hub collar.
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 4 – Heating Element Assembly
