S-CB
+
Boiler Range Manual
116
Fan
When the fan blades are polluted and dirty, carefully clean the blades with a soft brush. Notice: do not use too
much force on the blades or else the fan might be out of balance and run irregularly, causing noises and fan fail-
ures. Check the fan also for any water damages. In doubt always replace the fan of the boiler.
Insulation
The insulation of the heat exchanger (located on the rear wall inside the heat exchanger and burner door) must be
inspected. If this insulation disk shows any signs of (water) damage or degradation it should be exchanged. Also
check if there are any indications in the burner room of a high condensate level (caused by a blocked siphon) that
might have wetted the rear wall insulation. When this has happened the rear wall insulation should also be re-
placed.
Only use the insulation disk that is supplied by the boiler manufacturer.
The same procedure must be applied on the insulation and gaskets fitted on the burner door.
Siphon
Disassemble the siphon and clean every part of it. Check the siphon connection of the heat exchanger for any
blocking or pollution and clean it (if necessary). Check the functioning of the siphon by pouring clean tap water in
the burner room (when burner door is removed). This water will exit the heat exchanger by the siphon. Notice: d
on’t
wet the rear wall insulation.
When mounting the bottom part of the siphon, before commissioning the boiler and/or after
maintenance, the siphon must
ALWAYS
be completely filled with water.
This is a safety measure: the water in the siphon keeps the flue gases from leaking
out of the heat exchanger via the condensate drain.
Heat exchanger and burner room
After the removal of the complete burner unit check if there is any debris and dirt in the heat exchanger. The coils
of the heat exchanger can be cleaned by using a
non-metallic
brush. After this the dirt and dust can be removed
with a vacuum cleaner and by flushing the burner room with water.
Don’t forget afterwards to clean the siphon once
again.
Gas/air ratio
With every service check and/or maintenance of the boiler always check the gas/air ratio by measuring the CO
2
percentage (flue gas) at the maximum and minimum load of the boiler. If necessary adjust these values. See for
information chapter 14
“Adjusting and setting the burner”.
Pump
Check the electrical parts and the motor of the pump for a correct functioning. The pump must generate a sufficient
water flow over the (heat exchanger of) the boiler. When the pump produces noise, is operational for more than five
years or has signs of water leakage it is recommended to replace the pump as a precaution.
When defects and abnormalities are found by the service engineer during service and maintenance and
these are not repairable, this information should be reported to the owner/end-user of the installation. Also
the owner/end-user should be advised how to fix these defects and these defects should be reported in
the service report / log file of the boiler.
The siphon must always be filled to the
edge with water, before placing back on
the unit.
Summary of Contents for S-CB+ Series
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