17
For reasons of operational
readiness, functional safety,
economic efficiency and compliance
with emission limits, the operator
shall have the installation inspected
by an authorised expert at least
once a year.
■
The entire unit, including
the heat exchanger, combustion
chamber and fan burner, must
be cleaned of adherent dust or
dirt
■
The combustion residues in
the combustion chamber and
in the heat exchanger are to be
removed by appropriate means
■
The V-belt tension and the
motor fastening must be
checked regularly
■
Wear parts such as flue gas
brakes, seals, oil filter insert, oil
nozzles etc. must be checked
and replaced if necessary
■
It is essential to follow the
maintenance instructions for
the separate forced-air burners.
Care and maintenance
Rußschichtdicke [mm]
0
1,0
2,0
3,0
4,0
Wirkungsgradverluste
[%]
Anstieg
der
Abgastemperatur
[K]
40
0
80
120
160
200
6
0
8
10
12
14
4
2
■
The restrictions on exhaust gas
losses per §1 paragraph 1 of
the ordinance on small furnace
systems (1st. BImSchV must be
observed
■
Proof of the work carried
out by authorised specialist
personnel, together with
the usual logs, is therefore
mandatory
Soot deposits
Even small deposits of soot on
the heat transfer surfaces of
the combustion chamber and heat
exchanger will insulate the heat
output.
This results in a deterioration of
the combustion efficiency.
A soot layer just 1 mm thick can
cause an exhaust gas temperature
increase of approx. 50 K
(see diagram).
As can be seen from the above,
optimal burner adjustment
and regular maintenance are
indispensable for maintaining
efficiency and emission limits.
CAUTION
Prior to maintenance or
repair work, the unit must be
disconnected from the mains
power supply.
CAUTION
It is not sufficient to switch off
the unit only via the operating
switch!
CAUTION
Adjustment and maintenance
work on the unit and forced-
air burner may only be
carried out by authorised and
qualified technicians!
NOTE
We recommend concluding a
maintenance contract with an
authorised specialist company
for regular maintenance and
cleaning work.
CAUTION
If the operational cleaning and
burner adjustment intervals are
not adhered to, all warranty
claims will be invalidated!
NOTE
Contact the unit manufacturer
before you replace the parts
with parts or components other
than those listed in the spare
parts list.
Soot layer thickness [mm]
Efficiency losses [%]
Increase in exhaust gas temperature [K]
