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Pentair Water Commercial Pool and Spa
Page 16
Caution
Black carbon or green soot on a dirty heat
exchanger can, under certain conditions, be
ignited by a random spark or open flame. To
prevent this unlikely occurrence, dampen the
soot deposits with wet brush or fine water
spray before servicing or cleaning the heat
exchanger.
9. Clean heat exchanger using a wire brush to
remove soot and loose scale from the unit. Clean
fallen debris from bottom of heater. Make sure
burner ports are clear and pilot assembly is free
of debris.
10. Reassemble in reverse order and be sure the heat
exchanger baffles are replaced.
11. The gas and electric controls installed on the
heater are engineered for both dependable
operation and long life, but the proper
functioning of these components is necessary for
safe operation of the heater. It is strongly
recommended that the basic items be checked by
a competent serviceman every year and replaced
when necessary. The basic controls are:
a. Water temperature controls.
b. Pilot safety system.
c. Automatic electric gas valve(s)
d. Flow switch.
12. Low water cutoffs should be inspected every six
(6) months, when provided.
NOTE: The warranty does not cover any
damage caused by lack of required maintenance
or improper operating practices.
13. Pool Water Chemistry
The mineral content of the pool water increases
every day. This is due to the natural evaporation
which removes only distilled water and leaves the
minerals behind. The regular addition of algicidal
and sanitizing chemicals also adds greatly to the
mineral content of the pool. If the concentration of
minerals in the pool is permitted to become too
high, the minerals will precipitate out of the water
and deposit onto the walls of the pool, in the filter
and in the tubes of the heat exchanger.
For this reason it is very advantageous to drain
the pool regularly (at least every two years). This
precautionary measure will save the cost of
expensive repairs to the finish, filter system and
heater.
Another important safety precaution - always
keep the pH of the pool water between 7.3 and
Figure 16. Main Burner Flame Pattern.
7.7. This will add years to the life of the pool
finish, filter system and heater.
Most algicidal and sanitizing chemicals contain
sodium hypochlorite, while others contain
calcium hypochlorite. Sodium is not a scaling
chemical but calcium is. When using calcium
hypochlorite it is especially important to
frequently check the pH of the pool and to
change the pool water when the dissolved solids
indicate an excessive mineral content.
SECTION 5.
Troubleshooting
For proper service and problem diagnosis of the
heater and heater system, the following tools are
required:
a. Gas pressure test kit with range from zero to 14
W.C. Either a slack tube manometer or an
accurate gas pressure gauge is acceptable with
proper adapters to connect to the available
fittings in the line and on the gas valve.
b. Multi-meter with the following ranges:
0 to 500 volts A.C.
0 to 1000 ohms continuity.
0 to 50 millivolts.
c. Tube cleaning kit consisting of reamer, stainless
steel brush, speed handle and handle extensions.
d. A pool thermometer with a proper range.
e. A pressure gauge with proper range.