Dunkirk Helix VX Vertical Laser Tube Wall Hung Stainless Steel 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 clean (if necessary) by following
instructions in “Annual Examination and Cleaning of Boiler
Components” in this section.
• 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:
• system 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 field sourced low water cutoff according to relief
valve manufacturer instructions.
• Check flame signal with user interface. Flame signal
should be 6.5 micro amps or higher at 100% firing rate
( High fire). Flame signal should be 3.3 micro amps or
higher at 1% (low fire).
• Visual inspection of flame through sight glass. Burner
should be fully illuminated. See figure 11-1.
• 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.
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.
!
11 - GENERAL MAINTENANCE AND CLEANING
Sight Glass
Shown 50/75/100 Model FIGURE 11-1 Sight Glass -