Troubleshooting guide

PV500-17 07/13 Section 17
6
MAXIM
MAINTENANCE AND SAFETY INSPECTIONS (con't)
4. The tank will have a handhole for inspection
and cleaning. (See Figure 17-1, page 2.) To
inspect tank for scale buildup, remove the
handhole cover. If scale is present, it can be
loosened with a high pressure stream of water.
The smaller pieces can be flushed through the
drain and the larger pieces removed by hand
through the handhole. The frequency of
inspections will be determined by the rate of
scale buildup. Intervals of 30-60 days are
recommended.
5. If a firetube leaks for any reason, consult
factory for instructions.
IMPORTANT
Condensate coming from the tubes on a cold
start is normal and does not indicate a leaking
tube.
6. Regularly inspect the bottom tubesheet.
Inspect the SCALEGUARD

tubesheet
insulator for holes or areas that may have
pulled away from tubesheet. Repair or replace
as required.
CARBON MONOXIDE WARNING!
CAUTION: IMPROPER COMBUSTION MAY CAUSE SERIOUS INJURY.
PVI recommends a seasonal or annual combustion check-out be performed by a
qualified service agency to ensure safe and efficient operation.
Periodic Inspection of Operational Components
Periodic inspection and check-out of the burner ignition, control system, and fuel valve operation (for tight
close-off) should be made. Refer to the burner installation instruction for recommendations.
1. Examine the venting system at least once each
year for proper connections, alignment and
corrosion. The blower inlet will collect dust from
the air during operation. Disconnect the power to
the heater and clean the blower wheel when
necessary. Inspect all parts and make
replacements when necessary. Check wiring for
loose connections and burned wires.
CAUTION!
The relief valve is a primary safety device.
2. The temperature and pressure relief valve may
be checked by slowly lifting the seat lever on top
of the valve to determine its condition for safe
operation. 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 when tested, it must be
replaced. Replace the relief valve with like kind or
one meeting the requirements stated on the
rating decal located adjacent to the relief valve.
3. A table of periodic safety inspections is an
attachment of this manual for ease of
reference by the building service technician or
licensed equipment operator. Since water
heater designs vary, only some of these listed
inspections may be appropriate for your
particular model.
4. PVI strongly recommends the recording of
significant events, such as maintenance or
repair actions and safety inspections, and
encourage the preparation of an event log for
this purpose. All recorded events should be
dated, fully described, and signed by the
individual performing the service, repair, or
inspection. (See Table 17-1, page 7 for
sample of Inspection Record.)
Call your PVI Customer Service Representative
if you have any questions. (1-800-433-5654)