Dunkirk DWB Series - Manual (Page 33)

33
11 - GENERAL MAINTENANCE AND CLEANING
11.1 Beginning of Each Heating Season
• Check boiler area is free from combustible materials,
gasoline, and other fl ammable vapors and liquids.
• Visually inspect combustion air and vent piping for
proper operation. Check for and remove any obstruction
to fl ow 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.
• Test safety relief valve for proper operation. Refer to
valve manufacturer's instructions packaged with relief
valve.
• Examine fl ue passages in heat exchanger, burner and
cleaning (if necessary) by following instructions in
“Annual Inspection 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 fi eld
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 air inlet for blockage and clean as required;
• check boiler for any sign of leaks.
• Check heating system expansion tank.
• Check the Air pressure tubing
11.2 Annual Shut Down Procedure
• Follow instructions “To Turn Off Gas To Appliance” unless
boiler is also used to supply domestic hot water. See
section 10, page 26.
• Drain system completely if system does not have
antifreeze when heating system is to remain out of
service during freezing weather.
WARNING
Following service procedures must be performed
by qualifi ed service agent. Boiler owner shall not
attempt these steps. Failure to do so could result in
death or serious injury.
!
11.3 Annual Inspection and Cleaning of Boiler
Components
• Burner and heat exchanger inspection and cleaning.
• Remove any remaining loosened sediment using shop
vacuum with snorkel attachment.
! WARNING
“Caution: Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.”
“Verify proper operation after servicing.”