35
ixi gas pool and spa heater
Installation Manual
34
ixi gas pool and spa heater
Installation Manual
9.8
Shutting Down The Heater
Complete shutdown instructions are as follows. Refer
to
Figure 18
.
• Set temperature thermostat controls to their
lowest setting and turn off the controller. Make
sure the display shows OFF.
• Turn off all electrical power to the heater at the
junction box.
• Remove the top panel of the heater.
• Unplug the gas valve.
• Shut off the external gas supply valve to the
heater.
• Replace the top panel.
Section 10. Maintenance
If the heater is not going to be used for an extended
period of time and in colder climates, shut it down
completely. See
Section 9.8 and Figure 24
.
IMPORTANT MAINTENANCE NOTE
We recommend that before each pool season, the
Thermal Regulator Valve (TRV) be inspected for
proper operation and replaced if there are signs of
scaling or corrosion.
Corrosion and scaling are the result of improperly
balanced water please see Section
9.1.1
for complete
details on managing your water chemistry.
The TRV ensures the heater operates at it’s optimal
efficiency and if properly maintained will extend the
life of the heater.
WARNING
Do not operate the heater if the water temperature is
below 40 °F (4°C)
• Short term operation of heater when temps are
below 40F can continue but continuous flow must be
maintained.
• Prolonged operation with water below 50F can
seriously damage the heater and is not covered by
warranty.
10.1 Water Chemistry
Proper Water Balance is the key to the enjoyment of
your pool or spa experience and to the long life of
your heater.
The pH of your pool or spa’s water is one of the factors
that has the most impact on indicating how properly
balanced the water is. The other factors are:
temperature, total alkalinity, calcium hardness and
total dissolved solids. Cold water is typically more
acidic (corrosive), while hot water tends to lead to a
scale forming (basic) condition. While the heater is in
operation, if the PH is allowed to rise above 7.8 and
the calcium hardness and total alkalinity are not
properly maintained; calcium in the water could lose
solubility, coating the copper tubes inside the heat
exchanger. This will restrict the flow of water resulting
in reduced efficiency and possible damage to the
heater.
If the pH is allowed to drop below 7.2, and the
alkalinity is not properly maintained, the water will
become more acidic. Acidic water has a tendency to
dissolve metal components in the pool plumbing such
as copper tubing in the heat exchanger.
