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Dunkirk DCBF-100 - Maintenance and Routine Servicing; Component Replacement and Cleaning

Dunkirk DCBF-100
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58
NOTICE
Perform regular service and maintenance by

months to assure safe, trouble free operation and

11.2 Maintenance And Routine Servicing
Check and service boiler as necessary.
Frequency of servicing will depend upon installation
conditions and usage, manufacturer recommends
annually.

blocked.
Operate boiler. Check operation of boiler's controls.


leaking.
Follow safety valve manufacturer recommendations
for service.

checks must be performed every year:
check appearance and tightness of gas and
combustion circuit gaskets

sensing electrodes
check condition of burner and its connection to
aluminum front plate
check for dirt in combustion chamber. Use
vacuum cleaner for this cleaning operation
check gas valve is calibrated correctly using
combustion analyzer
check there is no dirt in condensate trap
check central heating system pressure
check expansion tank pressure
check vent system, clean if necessary
Record details and maintain service history.
11.3 Component Replacement And Cleaning
1.
Remove any deposits from heat exchanger using
suitable soft brush. Do not use brush with metallic
bristles.
2.
Check condition of the combustion chamber
insulation panels. Any damaged panels must be
replaced.
3.
Check condition of burner. Clean burner with soft


brush with metallic bristles this might damage the
burner.
4.
Remove any fallen deposits from bottom of inner
case.
5.
Check condition of electrodes.
6.
Check spark gap, positioning and height of
electrodes.
7.
Check fan impeller is clean and free to rotate.
WARNING
Combustion chamber insulation in this product

can be converted to cristobalite in very high
temperature applications. The International
Agency for Research on Cancer (IARC) has
concluded, Crystalline silica inhaled in the form
of quartz or cristobalite from occupational
sources is carcinogenic to humans (Group1).
Avoid breathing dust and contact with skin and

This type of respirator is based on the OSHA
requirements for cristobalite at the time this
document was written. Other types of respirators
may be needed depending on the job site
conditions. Current NIOSH recommendations
can be found on the NIOSH website http://
www.cdc.gov/niosh/homepage.html. NIOSH
approved respirators, manufacturers, and phone
numbers are also listed on this website. Wear

and eye protection. Apply enough water to the
combustion chamber lining to prevent dust. Wash
potentially contaminated clothes separately from
other clothing. Rinse clothes washer thoroughly.
NIOSH stated First Aid. Eye: Irrigate
immediately. Breathing: Fresh air.
!
WARNING

boiler at service switch. Close manual gas valve
to turn gas supply OFF to boiler. Test for gas
leaks on any gas carrying components after
servicing. Service not complete until appliance

Maintenance Manual provided with boiler.
!
WARNING
Following service procedures must be performed

attempt these steps. Failure to do so could result
in death or serious injury.
!
CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Failure to
follow these instructions could result in minor or
moderate injury.
!!
11 - GENERAL MAINTENANCE AND CLEANING
240013375 REV A, [07/01/2021]

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