Radiant RK 100, Инструкция по эксплуатации, Страница: 59 / 72

MAINTENANCE INSTRUCTIONS
RK 100 - RAD - ING - MAN.INST - 1311.1 - DIGITECH CS MIAH4
55
6.6 Maintenance operations
Before carrying out any cleaning or
part replacement operations,
ALWAYS turn off the ELECTRICITY,
WATER and GAS supplies to the
boiler.
The Manufacturer 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
”.
6.6.1 Cleaning the main exchanger
module and combustion unit

Switch off the power and gas supplies to the
boiler;

Disconnect the electrical connections of the
electric fan;

Disconnect the joint and remove the pipe
linking the gas valve to the injector unit;

Un-plug the ignition electrode and flame
detection wires from the ignition control unit;

Remove the transformer and the fixing
plate;

Unscrew the fixing screws and remove from
the venturi manifold, the air intake pipe;

Remove the flue exhaust connection and
the room-sealed chamber top

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 gasket on the
cover of the burner;

Clean the heat exchanger (fig. 1) 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.
B
A
Fig. 1
premix burner unit
burner
detection electrode
ignition electrode
primary heat
exchanger
stainless steel
pipe coil