10/2016 - Art. Nr. 4200 1016 3901A
35
en
Service
Maintenance
Burner and boiler servicing must only
be carried out by a trained heating
specialist. The system operator is
advised to take out a service contract
to guarantee regular servicing.
Please observe the following points:
• Disconnect the electrical supply and
close the gas shut-off valve before
carrying out any maintenance or
cleaning work.
Checking the exhaust gas
temperature
• Check the flue gas temperature at
regular intervals.
• Clean the boiler if the flue gas
temperature is more than 30°C above
the value measured at the time of
commissioning.
• To simplify the check, use a flue gas
temperature indicator.
Burner maintenance positions
After removing the screws
5
, the
equipment plate can be hung in the
maintenance positions.
Gas head disassembly
• Remove lock nut
C
of the pipe bracket,
screw in dome nut
E
• Pull out gas pipe to the right and
downwards
• Undo ignition and ionisation cables.
• When refitting, make sure that the
cable is routed correctly and that
O-rings
J1
and
J2
are correctly
seated.
Maintenance work on the burner
• Check gas supply components (tubes,
lines) and their connections for leaks
or signs of wear, replace if necessary.
• Check electrical connections and
connection cables for damage,
replace if necessary.
• Check gas filter, clean or replace as
necessary.
• Clean blower wheel and housing and
check for damage.
• Check and clean the mixing unit.
• Check ignition electrodes block,
readjust or replace as necessary.
• Start burner, check flue gas data,
correct burner settings if necessary.
• Check the setting for air pressure
switch and gas pressostat.
• Check the gas train controllability.
• Carry out an operating check.
Resetting the maintenance indicator
The maintenance symbol appears on
the control unit display after 30,000
start-ups. This is why it is necessary to
reset the maintenance counter after
each service. To do this, press the
control unit unlocking button for at least
9 seconds.
Blower wheel assembly
Observe the positioning diagram below
when replacing the motor and blower
wheel. The inside flange
A
of the blower
wheel must be fitted at the same level as
the equipment plate
B
. Insert a straight
edge between the wing of the blower
wheel and set
A
and
B
to the same
height, tighten the set screw on the
blower wheel (maintenance position 2).
