Troubleshooting guide

PV500-23 04-2005 Section 23
15
POWER VT
®
BOILER
MAINTENANCE
CARBON MONOXIDE WARNING: An annual or seasonal combustion checkout must be
performed by a qualified service agency to ensure safe operation. Failure to maintain
proper combustion can result in injury or death.
CAUTION: Be sure manual valves and
burner electrical switch are turned off
before removing any part for service or
cleaning. Do not push relay contacts in
manually; accidental opening of main
automatic valve can result. Ensure there
is no pressure on the vessel prior to
disassembly of any water carrying
component to prevent serious injury.
1. A preventive maintenance is recommended to
assure a long, trouble-fee life of the boiler.
Refer to ASME Section VII for a
comprehensive plan for boiler operation,
maintenance and lay-up.
A table of periodic safety inspections is
attached to this manual for ease of reference
by the building service technician or licensed
equipment operator (Table 23-2, page 17).
Since boiler designs vary, only some of these
listed inspections may be appropriate for your
particular model.
2. Proper water treatment is critical to prevent
corrosion as well as to reduce scale, both of
which will reduce the life of the boiler. Hydronic
heating systems, steam heating systems and
process steam systems all have different
treatment requirements. The makeup of the
water, just as the blowdown, will vary with each
application. Rely on the recommendation of the
water consultant.
SINCE PVI CANNOT CONTROL THE USE OF
THE BOILER, WATER CONDITIONS OR
MAINTENANCE, THE WARRANTY ON THE
BOILER DOES NOT COVER POOR
PERFORMANCE, STRUCTURAL FAILURE OR
LEAKING DUE TO AN EXCESSIVE
ACCUMULATION OF SCALE. HOWEVER,
SHOULD A FIRETUBE LEAK FOR ANY
REASON, CONSULT THE FACTORY FOR
INSTRUCTIONS.
3. Examine the venting system at least monthly
for proper connections, alignment, or the
presence of corrosion. If corrosion appears,
the boiler must not be operated until the
corroded vent section(s) is replaced.
4. Oil the blower motor and wipe oil and dust from
the burner at regular intervals. The static fan
will collect dust from the air during operation.
Clean the screen and fan blades if necessary.
The burner should be cleaned each year.
Inspect all parts and make replacements when
necessary. Check wiring for loose connections
and burned wires.
5. Periodic inspections and check-out of the
burner ignition system, control system and fuel
valve operation (for tight close-off) should be
made. Refer to the burner installation
instructions for inspection recommendations.
6. Inspect operating controls to ensure they are
level, especially those containing mercury
switches. Make sure connecting tubing is not
kinked or damaged on remote bulb
thermostats.
7. The pressure safety valve should be checked
at regular intervals by manually opening the
valve. The openings inside the valve may
become restricted by a buildup of scale and
become inoperative. If the valve does not open
and close properly, it must be replaced. Shut
down boiler, relieve internal pressure, and
replace safety valve with a like kind or one
meeting the requirements stated on the rating
decal located adjacent to the safety valve
mounting location.
CAUTION: The safety valve is a primary
safety device.