Lennox COWB2

4
1. Read the Owner’s Manual for Safe Operation
carefully. Failure to follow the rules for
safe operation and the instructions can
cause a malfunction of the boiler and result in
death, serious bodily injury, and/or property
damage.
2. Check your local codes and utility requirements
before installation. The installation must be in
accordance with their directives, or follow
NFPA 31 Installation of Oil Burning Equipment,
latest revision.
3. Before servicing, allow boiler to cool. Always
shut off any electricity and oil to boiler when
working on it.
4. Inspect oil line and connections for leaks.
5. Be certain oil burner nozzle is the size
required. Over-ring will result in early failure of
the boiler sections. This will cause dangerous
operation.
6. Never vent this boiler into an enclosed space.
Always vent to the outside. Never vent to
another room or inside a building.
7. Be sure there is adequate air supply for
complete combustion.
8. Follow a regular service and maintenance
schedule for efcient and safe operation.
9. Keep boiler area clean and free of combustible
material, gasoline and other ammable vapors
and liquids.
10. Oil burners are not do-it-yourself items. This
boiler must be installed and serviced by
qualied professionals using combustion test
instruments.
11. Be aware when piping the relief valve that
if the system pressure exceeds the safe
limit of 30 pounds per square inch, the relief
DO NOT USE GASOLINE CRANKCASE DRAININGS OR ANY OIL CONTAINING GASOLINE.
rUles FOr saFe iNsTallaTiON aNd OperaTiON
valve will automatically lift open. Lifting of the
relief valve can discharge large quantities
of steam and hot water, which may damage
the surroundings. Before installing the relief
valve read the manufacturer’s instructions
and maintenance section of the manual on
relief valves.
12. Installation and sizing of the expansion tank
must consider the heating systems total
water volume, temperature, boiler initial
ll pressure, and system arrangement. An
improperly installed and sized expansion
tank may result in frequent lifting of the relief
valve or other heating system problems. For
proper installation, sizing, and maintenance
of the expansion tank follow the guidelines
established by Dunkirk Boilers and the
expansion tank manufacturer.
13. Expansion tank performance and life
expectancy can be hindered by overlling
the boiler. Dunkirk Boilers recommends an
initial ll pressure of 10-12 psig. For higher ll
pressures the expansion tank’s air charge will
need to be increased to match the ll pressure.
Consult the manufacturer’s guidelines for
sizing and selection.
14. Purging the heating system of air and gases
when first putting the boiler into service
is critical for proper circulation and quiet
performance. Once the air and gases are
purged, for boiler installations using float
type vents, the air vents should be closed for
normal operation. If air is heard or noticed by
a loss of heat, purge the system and open the
vents for a short period of time.
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WarNiNg
This boiler has been designed for residential installations. If used for commercial
applications, all jurisdictional requirements must be met. This may require wiring
and/or piping modications. The manufacturer is not responsible for any changes
to the original design.