Dunkirk Helix VLT Vertical Laser Tube, Wall Hung Modulating Condensing Boiler - Manual (Page 43)

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11.1 Beginning of Each Heating Season
• Check boiler area is free from combustible materials,
gasoline, and other flammable vapors and 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 6. 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.
• Test safety relief valve for proper operation. Refer to
valve manufacturer's instructions packaged with relief
valve.
• Examine flue passages in heat exchanger, burner,
condensate lines, and cleaning (if necessary) by following
instructions in “Annual Examination and Cleaning of Boiler
Components” in this section.
• 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
are in place;
• return temperature sensor clip must be securely
seated on pipe; Check boiler for any sign of leaks.
• Check low water cutoff using user interface.
• Check operation by pressing test button on low water
cutoff.
• "Low Water" LED should illuminate and burner
should shut down.
• Should get error message on User Interface
(E36).
• Every 5 years remove low water cutoff. Reinstall
after cleaning.
• Every 10 years replace low water cutoff.
• Check flame signal with user interface. Should be 8 micro
amps at 100% firing rate ( High fire).
• Visual inspection of flame through sight glass. Burner
should be fully illuminated. See figures 11-1 & 11-2.
• Check heating system expansion tank.
CAUTION
Label all wires prior to disconnection when servicing
controls. Wiring errors can cause improper and
dangerous operation.
!
NOTICE
Verify proper operation after servicing.
NOTICE
Perform regular service and maintenance by
qualified service agency at least once every 12
months to assure safe, trouble free operation and
maximum efficiency.
FIGURE 11-1 Sight Glass - 050/075/100/150/200 MBH
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.
!
FIGURE 11-2 Sight Glass - 299 MBH
Sight Glass
Sight Glass
11 - GENERAL MAINTENANCE AND CLEANING