25INSTRUCTION MANUAL AIR HEATER TYPE TR
1. Inspect the outside of the heat exchanger.
2. Clean the fan guard on the outside of the heater.
Clean the fan blades if required.
3. Open the access panel.
4. Clean the inside of the air heater. Focus on the fol-
lowing parts:
– Body
– Fan blades and motor
– Heat exchanger
– Temperature sensor
– Vane switch (if present)
5. Check if the wiring, nuts and bolts are properly
secured and tightened.
6. Grease any parts and bolts that are regularly loos-
ened for maintenance.
7. Open the manual gas valve in the supply line and
check if the supply lines are air tight, do not leak
and do not contain air.
Some checks can only be performed when the heater is
running. Do the following:
1. Reconnect the air heater to the power supply.
2. Switch on the air heater.
3. Check if the heater operates without problems. See
chapter if any errors occur.
4. Check the air heater’s combustion eciency. If
necessary:
– Adjust the burner settings (see §8.1).
10.3 Maintenance of the burner unit
The burner unit is an important part of the air heater and
requires special maintenance.
To perform maintenance on the burner unit, do the
following:
1. Disconnect the ignition and ionisation cables from
the burner unit.
2. Disconnect the burner manifold from the gas valve.
This is a clamp coupling.
3. Remove the burner assembly from the air heater,
4. Check the burner for damage, corrosion and align-
ment of the separate burners.
a. Clean with a brush.
5. If necessary, clean the electrodes.
CAUTION! Do not twist the electrode out of shape.
6. Remove the flame inserts from the burner tube
inlet opening of the heat exchanger.
– Clean the flame inserts or replace them when
they are deformed (figure 24).
Figure 24 - Flame inserts in the burner tube.
7. Check the inside of the heat exchanger for dirt and/
or damage. If necessary:
– Clean the heat exchanger.
8. Disassemble the motor part from the flue fan. The
housing can remain on the heater.
9. Clean the inside of the flue fan.
10. Check the air supply and the flue discharge for dirt
and clean it.
11. Reassemble the burner unit. If necessary:
– Use new gaskets.
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