andrews R18 Series, Техническая документация инструкция

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18IP22B
50
Routine maintenance
The frequency of routine maintenance depends on the use and
environment in which the water heater is used although it must
be carried out at least annually.
The scope of routine maintenance includes the following:
I Cleaning the heat exchanger
II Cleaning the burner assembly and inspect the condition of
the burner and ignition components
III Checking the gas train for soundness
IV Inspecting the adjustment of the air damper and operation
of the modulating gas valve and servo-motor
V Checking the effectiveness of natural or mechanical venti-
lation
VI Inspecting the flue system including terminal, for damage
and ensure it is evacuating the products of combustion
without any leakage or spillage
VII Check gas pressure settings, safety lock-out systems and
water flow switch
VIII Inspect condition of refractory lining.
Procedure
Release the gas train.
Disconnect all the plugs from the front electrical panel, release
the screws at all 4 sides of the burner trolley. The burner trolley
can now be withdrawn from underneath the water heater.
Remove the stainless steel sidebaffles down holders by releas-
ing two screws in either side and remove the flueway baffles
from the top of the heat exchanger. Inspect the heat exchanger
for deposits and clean if necessary, check condition of the
copper fin tubes and replace flueway baffles when damaged.
Check the condition of the water heater for any possible corro-
sion damage. Also check the condition of the combustion
chamber insulation panels, replacing if necessary.
With the burner trolley removed each individual burner bar can
be removed and cleaned, with the exception of the right hand
burner bar. This is done by first removing the insulation covered
stainless steel channels, located at the front and rear of the
burner assembly, and then removing the burner bar by first
lifting the end of the burner out of its locating notch and then
withdrawing the burner from its injector (avoid damaging the
electrodes when removing the pilot burner assembly).