Pentair 75 - Manual (Page 10)

10
P/N 471105 Rev. E 5-16-01
Maintenance
It is recommended that you check the following items
at least every six months and at the beginning of every
swimming season.
1. Examine the venting system. Make sure there are
no obstructions in the flow of combustion and
ventilation air.
2. Visually inspect the main burner and the pilot
burner flame (on millivolt models). The normal
color of the flame is blue. When flame appears
yellow, burners should be inspected and cleaned;
see Figure 8.
3. Keep the burner area clear and free from combus-
tibles and flammable liquids.
ENERGY SAVING TIPS
1. If possible, keep pool or spa covered when not in
use. This will not only cut heating costs, but also
keep dirt and debris from settling in the pool and
conserve chemicals.
2. Reduce the pool thermostat setting to 78 ° F. or
lower. This is accepted as being the most healthy
temperature for swimming by the American Red
Cross.
3. Use an accurate thermometer.
4. When the proper maximum thermostat settings
have been determined, tighten the thermostat knob
stopper.
5. Set time clock to start circulation system no earlier
than daybreak. The swimming pool loses less heat
at this time.
6. For pools that are only used on the weekends, it is
not necessary to leave the thermostat set at 78 °F .
Lower the temperature to a range that can be
achieved easily in one day. Generally, this would
be 10
° F. to 15 ° F. , if pool heater is sized properly.
7. During the winter or while on vacation, turn heater
off.
8. Set up a regular program of preventative
maintenance for the heater each new swimming
season. Check heat exchanger, controls, burners,
operation, etc.
MAINTENANCE INSTRUCTIONS
SPRING AND FALL OPERATION
If the pool is being used occasionally, do not turn the
heater completely off. Set the thermostat down to
65
° F. This will keep the pool and the surrounding
ground warm enough to bring the pool up to a com-
fortable swimming temperature in a shorter period of
time.
WINTER OPERATION
If the pool won't be used for a month or more, turn
the heater off at the main gas valve. For areas where
there is no danger of water freezing, water should
circulate through the heater all year long, even though
you are not heating your swimming pool. This heater
should not be operated out doors at temperatures
below 32° F. (0° C.). Where freezing is possible, it is
necessary to drain the water from the heater. This
may be done by opening the drain valve located at the
inlet/outlet header allowing all water to drain out of
the heater. It would be a good practice to use
compressed air to blow the water out of the heat
exchanger.
Blue Flame
Figure 8.