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Rev. E 11-5-07 P/N 472128
7
MAINTENANCE INSTRUCTIONS
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 ob-
structions in the flow of combustion and ventilation air.
2. Visually inspect the main burner and the pilot burner
flame. The normal color of the flame is blue. When flame
appears yellow, burners should be inspected and cleaned;
see Figure 8.
3. Keep the heater area clear and free from combustibles
and flammable liquids.
Maintenance
Pressure Relief Valve
In some installations, a
pressure relief valve
(PRV) is required on the
MiniMax
®
CH heater. To
install a PRV, carefully
drill a 3/8 in. hole in
center of 3/4 in. NPT
port (on main header)
being careful to drill
only thru wall at bottom
of 3/4 in. NPT port and
no deeper—now thread
in the 3/4 NPT PRV. (Sold separately.)
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 the 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.
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 comfortable swimming temperature in a
shorter period of time.
CAUTION
OPERATING THIS HEATER CONTINUOUSLY AT WATER TEMPERATURE BELOW 68° F. WILL CAUSE HARMFUL
CONDENSATION AND WILL DAMAGE THE HEATER AND WILL VOID THE WARRANTY.
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.
The MiniMax
®
CH should not be operated out doors at temperatures below 0° F. for propane and -20° F. for natural gas.
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 (see Figure 9.) 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. (See additional notes under Important Notices in Introduction
on page 3.)
WINTER OPERATION
Figure 8.
Blue Flame
Figure 7.
FOR PRV
INSTALLATION
DRILL THRU
THE NPT PORT
REMOVE FLOW VALVE
BEFORE DRILLING
THE NPT PORT
Figure 9.
CAUTION
REMOVE THE FLOW VALVE ASSEMBLY WHEN DRILLING
THE HOLE TO INSTALL A PRV. OTHERWISE, YOU WILL
DRILL INTO THE VALVE ASSEMBLY.