Dunkirk Q90-200 Series II - Manual (Page 48)

48
Acidic nature of flue gasses condensing on aluminum boiler
sections cause formation of aluminum oxide. This oxide
formation is normal, is generally uniform throughout boiler
sections, and represents negligible mass of aluminum that
is consumed by oxidation during life of boiler.
If left unchecked, this buildup may eventually cause
blockage of flue gas passages in boiler sections, reducing
efficiency, and ultimately shutting down boiler due to lack
of combustion air flow.
Regular service and maintenance by qualified
service agency must be performed to assure safe
trouble free operation and maximum efficiency. It is
recommended to service boiler at least once every 12
months.
Beginning Of Each Heating Season
1.
Schedule annual service call by qualified service
agency, which includes:
A. Examine flue passages between boiler sections,
burner, and condensate lines, and clean if
necessary following annual examination and
cleaning instructions in paragraph F (below).
B. Visually inspect venting and air intake system for
proper operation. If vent or air intake show any
signs of deterioration or leakage, repair or replace
immediately. Ensure proper re-assembly and re-
sealing of vent and air intake system.
C. Check for and remove any obstruction to flow of
combustion air or venting of flue gases.
D. Follow instructions for “Startup” on page 28.
E. Follow “Checkout Procedure & Adjustments” on
page 35.
F. Visually inspect condensate drain line for proper
operation. Check for deteriorated or plugged
condensate drain line.
G. Check all gasket joints for leakage, and tighten
bolts or replace gaskets if necessary.
H. Remove jacket front and top panels and check for
piping leaks around relief valve and other fittings.
Repair, if found. DO NOT use stop leak compounds.
2.
Check boiler area is free from combustible materials,
gasoline, and other flammable vapors and liquids.
3.
Circulator pump and blower motor furnished with boiler
are permanently lubricated from factory and require
no further lubrication. Lubricate additional or non-
factory supplied pumps and/or motors according to
manufacturer’s instruction.
Daily During Heating Season
1.
Check for and remove any obstruction to flow of
combustion air or venting of flue gases.
2.
Check boiler area is free from combustible materials,
gasoline, and other flammable vapors and liquids.
Monthly During Heating Season
1.
Remove jacket front and top panels. Check for piping
leaks around relief valve and other fittings. If found,
contact qualified service agency to repair. DO NOT use
stop leak compounds.
2.
Test relief valve. Refer to valve manufacturer’s
instructions packaged with relief valve.
3.
Visually inspect venting and air intake system for
proper function. If vent or air intake show any signs
of deterioration or leakage, contact qualified service
agency to repair or replace immediately and ensure
proper reassembly and resealing of vent and air intake
system.
4.
Visually inspect PVC condensate drain pipe for proper
operation. If drain pipe shows any signs of blockage,
leakage, or deterioration contact qualified service
agency to clean, repair, or replace immediately.
5.
Check air vent(s) for leakage.
Periodically During Heating Season
Where low water cutoffs are used, periodic inspection of
low water cutoff is necessary, including flushing of float
type devices. Refer to low water cut off manufacturer’s
specific instructions.
16 - MAINTENANCE AND CLEANING