General Maintenance And Cleaning; Beginning Of Each Heating Season - Dunkirk DCBF-100 Manual

DANGER
!
Before servicing, turn off electrical power to
boiler at service switch. Close manual gas valve
to turn gas supply OFF to boiler. Failure to
comply will result in death or serious injury.
CAUTION
! !
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.
Note
erify proper operation after servicing.
V
Perform regular service and maintenance
by qualified service agency at least once
Note
every 12 months to assure safe, trouble
free operation and maximum efficiency.
A Heat Exchanger cleaning kit is available
Note
for annual service of the boiler. See repair
parts manual for part number.

11.1 Beginning of Each Heating Season

• Check boiler area is free from combustible materials,
gasoline, and other flammable vapors and corrosive
liquids.
• Visually inspect combustion air and vent piping
for proper operation. Check for and remove any
obstruction to flow of combustion air or vent
gases. Immediately repair or replace pipe showing
deterioration or leakage. Reassemble per instructions
in section 5. Ensure proper reassembly and resealing
of system.
• Visually inspect condensate drain line for proper
operation. Checking for deteriorated or plugged
condensate drain line. Verify condensate trap drains
freely and clean as required.
• Test safety relief valve for proper operation. Refer to
valve manufacturer's instructions packaged with relief
valve.
• Examine heat exchanger, burner, condensate lines, and
clean (if necessary) by following instructions in section
11.3 - Component Replacement And Cleaning.

11 - GENERAL MAINTENANCE AND CLEANING

• Circulator pump and combustion air blower motor
furnished with boiler are permanently lubricated from
factory and require no further lubrication. Lubricate
field sourced pumps and/or motors according to
pump and/or motor manufacturer's instruction.
• Check following components are operating properly
and are free of blockages or obstructions:
• air vent;
• check venturi air inlet for blockage and clean as
required;
• verify pressure test port cap and combustion test
port caps are in place;
• verify supply and return sensors are properly
clipped to pipes as close to heat exchanger as
possible;
• Check boiler for any sign of leaks.
• Check external low water cutoff operation (if
installed).
• Check operation by pressing test button on low
water cutoff.
• "Low Water" LED on the external LWCO should
illuminate and boiler should shut down.
• Every 5 years remove low water cutoff. Reinstall
after cleaning.
• Every 10 years replace low water cutoff.
• Visual inspection of flame through sight glass. Burner
should be fully illuminated.
• Check heating system expansion tank.
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240013375 REV A, [07/01/2021]