FLOWMAX Technologies FLOWMAX-120, Инструкция по эксплуатации

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MAINTENANCE INSTRUCTIONS
52
6.7 Maintenance operations
Before carrying out any cleaning or part
replacement operations, ALWAYS turn
off the ELECTRICITY, WATER and GAS
supplies to the water heater.
FLOWMAX will not be held responsible
for damage to any of the water heater’s
components caused by non-compliance
with this instruction.
For all maintenance operations requiring removal
of the water heater casing, refer to the procedures
described in paragraph
6.3 “Accessing the water
heater”.
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
recommended detergent from FLOWMAX
Technologies 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 water heater to make sure that all gas and exhaust joints are tight.
primary heat
exchanger
flue connection
chamber
stainless steel
pipe coil
ceramic fibre
washer
Fig. 2
Fig. 1
premix burner unit
burner
ionization
electrode
ignition
electrode
primary heat exchanger