Maintenance Operations - PENSOTTI Solenne PCH50B-H Instruction Manual

6.7 Maintenance operations

Before carrying out any cleaning or part
replacement operations, ALWAYS turn off the
ELECTRICITY, WATER and GAS supplies to the boiler.
Granby Heating Products, LLC 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 6.4 "Accessing the boiler".
Cleaning the main exchanger module and combustion
unit (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 fiber 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 fiber.
• Check the integrity of the gasket on the cover of the
burner.
• Clean the heat exchanger using a household detergent
for stainless steel, distributing the product on the spirals
of the exchanger using a brush. Do not wet the ceramic
fiber 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 appliance to make sure that all gas and exhaust joints are tight.
MAINTENANCE INSTRUCTIONS
ignition electrode
Fig. 2
Primary
heat
exchanger
Ceramic
fiber gasket
premix burner unit
burner
primary
heat
detection electrode
Fig. 1
flue duct
connection
chamber
stainless
steel pipe
60