20
Part Number 550-110-832/1014
OWB & OWT
Series 2
Oil-Fired Water Boilers –
Boiler Manual
11 Service and maintenance
continued
Fill the system:
Annual service
1. Close manual and automatic air vents and drain cock.
2. Fill to correct system pressure. Correct pressure will vary
with each installation. Normal cold water fill pressure for
residential systems is 12 psig. Boiler water pH 7.0 to 8.5 is
recommended.
Failure to maintain recommended pH level can cause
section failure and leaks, resulting in potential of
severe personal injury, death or substantial property
damage.
3. Open automatic air vent (if installed) one turn.
4. Starting on the lowest floor, open manual air vents one at a time
until water squirts out. Close vent. Repeat with remaining vents.
5. Refill to correct pressure.
Follow information below to prevent severe personal
injury, death or substantial property damage:
• Do not use crankcase drainings or any oil containing
gasoline. See burner manual for proper fuel oil.
• Do not attempt to start burner when excess oil has
accumulated in combustion chamber, when unit is
full of vapor, or when combustion chamber is very
hot.
• Do not start burner unless collector hood, breeching
and burner mounting door are secured in place.
Never burn garbage or paper in the boiler.
• Never leave combustible material around boiler.
1. Verify boiler is filled with water.
2. Open burner door and verify rear target wall,floor and burner
door insulations are in proper condition and position.
3. Verify burner mounting door is closed and bolted tightly and
burner plug is connected.
4. Refer to burner manual for burner start-up, adjustment and
checkout procedures. Factory burner adjustment and settings
may not be suitable for specific job conditions.
Make final burner adjustments using combustion
test equipment to assure proper operation. Do not
fire boiler without water. Sections will overheat,
damaging boiler and resulting in substantial property
damage.
5. Check boiler and system piping for leaks.
6. Inspect breeching and venting for proper operation.
Boiler relief valve
1. Inspect the relief valve and lift the lever to verify flow as in the
following warnings, excerpted from a relief valve manufacturer’s
warning label. Before operating any relief valve, ensure that it
is piped with its discharge in a safe area to avoid severe scald
potential. Read manual Section 4, page 7, before proceeding
further.
Safety relief valves should be reinspected AT LEAST
ONCE EVERY THREE YEARS, by a licensed plumb
-
ing contractor or authorized inspection agency, to
ensure that the product has not been affected by
corrosive water conditions and to ensure that the
valve and discharge line have not been altered or
tampered with illegally. Certain naturally occurring
conditions may corrode the valve or its components
over time, rendering the valve inoperative. Such
conditions are not detectable unless the valve and its
components are physically removed and inspected.
This inspection must only be conducted by a plumb-
ing contractor or authorized inspection agency —
not by the owner. Failure to reinspect the boiler relief
valve as directed could result in unsafe pressure
buildup, which can result in severe personal injury,
death or substantial property damage.
2. After following the above warning directions, if the relief valve
weeps or will not seat properly, replace the relief valve. Ensure
that the reason for relief valve weeping is the valve and not
over-pressurization of the system due to expansion tank
waterlogging or undersizing.
Following installation, the valve lever must be
operated AT LEAST ONCE A YEAR to ensure that
waterways are clear. Certain naturally occurring
mineral deposits may adhere to the valve, rendering
it inoperative. When manually operating the lever,
water will discharge and precautions must be taken
to avoid contact with hot water and to avoid water
damage. Before operating lever, check to see that
a discharge line is connected to this valve directing
the flow of hot water from the valve to a proper
place of disposal otherwise severe personal injury
may result. If no water flows, valve is inoperative.
Shut down boiler until a new relief valve has been
installed.
Oiled-bearing circulators
1. The circulator shipped with the OWB and OWT boilers are
water-lubricated. No oiling is required.
2. Check other circulators in the system. Oil any circulators
requiring oil, following circulator manufacturer’s instructions.
Over-oiling will damage the circulator.
Oiled-bearing burner motors
1. The burner may need to be lubricated if motor is equipped
with oiling cups. Apply a few drops only of SAE 20 detergent
oil (never use household oils). Do not attempt to “fill up” the
oil cup. Over-oiling can damage the motor.
Verify component operation
1. Perform the checkout sequence on page 16 to verify system
and components are operating correctly.
To place boiler in operation:
