5.5
Cleaning the flue stack valve
1. Remove the bottom cover (B) of the T-
piece (A).
2. Clean the flue from top to bottom with a
flue brush.
3. Check the connections for leakage.
4. Check the flue parts for rust.
Caution
Rust formation indicates that
chlorine containing materials have
been burnt.
Chlorine containing materials
seriously damage the heater. This
may void your warranty.
Contact your dealer for instructions
on how to test waste oil for chlorine.
Reposition the bottom cover.
6.1
Troubleshooting table
AT 300 series
5.6
1. Remove the fuel supply (A).
2. Take off the connection plate (B).
3. Take plug (C) from the chassis part.
4. Pull up the tank lock (D).
5. Pull the fuel tank (E) from the heater with
care.
6. Install the fuel tank in reversed order.
6
40.020.933 - rev. 04 - 2011
Remove the fuel tank (fig. 8)
FAULTS
Ensure that the power is switched on,
and the fuel tank is full, before you
start troubleshooting.
Warning
Switch off power during
maintenance!
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