MAINTENANCE INSTRUCTIONS
46
6.5 Maintenance operations
Before carrying out any cleaning or part
replacement operations, ALWAYS turn off the
ELECTRICITY, WATER and GAS supplies to the
boiler.
Radiant Bruciatori s.p.a. will not be held
responsible for damage to any of the boiler’s
components caused by non-compliance with
this instruction.
For all maintenance operations requiring removal of the
boiler casing, refer to the procedures described in
paragraph
6.3 “Accessing the boiler”.
Cleaning the main exchanger module and
combustion unit
(see fig. 1)
•
Disconnect the electrical connections of the electric fan.
•
Disconnect the joint and remove the pipe linking the gas
valve to the injector unit (venturi).
•
Disconnect the joint and remove the gas feed pipe from
the gas valve.
•
Un-plug the ignition electrode and flame detection wires
from the ignition control unit.
•
Unscrew the ring-nut at the bottom of the room-sealed
chamber and remove the gas valve.
•
Unscrew the nuts securing the burner unit (consisting of
a fan, manifold and burner) to the primary heat
exchanger.
•
Remove the burner unit, paying particular attention not
to remove the ceramic fibre protection from the bottom
of the heat exchanger.
•
Check that the burner is not affected by deposits,
scaling or excessive oxidation. Check that all the holes
in the burner are free;
•
Clean the electrodes carefully without altering their
positions with respect to the burner;
•
Clean the burner cylinder using a non-metal brush and
without damaging the ceramic fibre;
•
Check the integrity of the washer on the cover of the
burner;
•
Clean the heat exchanger (see fig. 2) using a household
detergent for stainless steel, distributing the product on
the spirals of the exchanger using a brush. Do not wet
the ceramic fibre coating. Wait a few minutes then
remove the deposits using a non-metal brush. Then
remove the residues under running water;
•
Remove the pipe clip, remove the condensate drainpipe
and clean under running water.
•
Unscrew the joint to the condensate trap, remove the
trap and wash under running water.
•
With the cleaning completed, re-assemble the
components following the above procedure in reverse
order.
•
Finally, check the boiler to make sure that all gas and
exhaust joints are tight.
flue connection
chamber
primary heat
exchanger
stainless steel
pipe coil
ceramic fibre
washer
Fig. 2
Fig. 1
premix burner unit
burner
ionisation electrode
ignition electrode
primary heat
exchanger
B
A
Summary of Contents for RKA 34
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