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away from contaminated areas.
1. Combustible/
fl
ammable materials --
Do not store combustible materials,
gasoline or any other
fl
ammable
vapors or liquids near the boiler.
Remove immediately if found.
2. Air contaminants -- Products
containing chlorine or
fl
uorine,
if allowed to contaminate the
heater intake air, will cause acidic
condensate in the heater. This
will cause signi
fi
cant damage to
the heater if allowed to continue.
Read the list of potential materials
listed in Section 4.1. If any of these
products are in the room from which
the heater takes its combustion air,
they must be removed immediately
or the heater combustion air (and
vent termination) must be relocated
to another area.
6.1.3 - Check pressure
gauge
1. Make sure the pressure reading on
the heater pressure gauge (item “M”
of Figure 5-1) does not exceed the
maximum working pressure. Higher
pressure may indicate a problem
with the expansion tank.
2. Contact a quali
fi
ed service
technician if problem persists.
6.1.4 - Check vent piping
1. Visually inspect the vent outlet
termination to be sure it is
unobstructed. Visually inspect the
entire length of the
fl
ue gas vent
piping for any signs of blockage,
leakage, or deterioration of the
piping. Notify your quali
fi
ed service
technician at once if you
fi
nd any
problems.
WARNING!!!
Failure
to inspect the vent system
as noted above and have it
repaired by a qualifi ed service
technician can result in vent
system failure, causing severe
personal injury or death.
6.1.1 - Check relief valve
Inspect the relief valve and lift the
lever to verify
fl
ow. Before operating
any relief valve, ensure that it is piped
with its discharge in a safe area to
avoid severe scald potential. Relief
valve should be re-inspected at least
once every three years, by a licensed
plumbing 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 plumbing
contractor or authorized inspection
agency – not by the user.
WARNING!!!
Failure to
re-inspect the relief valve as
directed could result in unsafe
pressure buildup, which can
result in severe personal injury,
death, or substantial property
damage.
6.1.2 - Check heater area
WARNING!!!
To prevent
potential of severe personal
injury, death, or substantial
property damage, eliminate
all materials discussed below
from the heater vicinity and
the vicinity of the heater
combustion air inlet.
If contaminants are found:
Remove products immediately
from the area. If they have
been there for an extended
period, call a qualifi ed service
technician to inspect the
heater for possible damage
from acid corrosion.
If products cannot be removed,
immediately call a qualifi ed
service technician to re-pipe
vent and air piping and locate
vent termination/air intake
6 - MAINTENANCE
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