Page 30 RHC 8000 EN April 2019 D301207 Issue C
7.5 Thermal Overheat (Limit)
Controls
If it is determined that the thermal overheat
control needs replacing, use only authorized
replacements that are designed for this
appliance.
To gain access to the control, open the
hinged controls compartment access door.
Refer to figure 12 for control locations.
The control near the top of the air heater is
a disc type control.
The lower one is a capillary type one with
a capillary tube that extends into the heat
exchanger area. To remove the controls,
disconnect the wires leading to them,
remove the fixing screws and lift clear of the
inner-casing panel.
Note: The capillary control is fitted to a
bracket. With the bracket removed from
the air heater, remove the control from
the bracket.
When replacing the capillary control be
careful not to damage the capillary tube by
kinking. Make bends with a generous radius
(± 25 mm). When replacing the disc type
control never manually attempt to operate
the disc by pushing on the disc. Doing
so will alter the calibration and could be
hazardous.
7.6 Combustion Air Control
Pressure Switch
If it is determined that the air differential
pressure switch needs replacing, use only
authorized replacements that are designed
for the air heater being serviced. These
switches are calibrated to operate at the
designed combustion airflow duty for each
appliance size in the product range.
7.7 Combustion Air Fan (Venter)
1. Ensure gas supply to the air heater is
turned OFF
2. After the air circulation fan has stopped,
switch OFF the electricity supply to the air
heater.
3. To gain access to the fan open the
controls compartment access door. refer to
figure 12 for location
4. Mark for future identification and
disconnect the wires connecting the fan
motor at the terminals on the main wiring
junction.
5. Remove combustion air fan and clean as
necessary using a wire brush and solvent to
remove sticky residues.
6. Re-assemble and check for free rotation
before proceeding to test the appliance.
Summary of Contents for Reznor RHC DJL 8000
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