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7.3.3 Setting Pool and Spa
Temperatures, Changing from
Fahrenheit to Celsius
The Model LX heater displays temperature in
Fahrenheit units when powered-up. To switch to
Celsius, first turn the heater to the "Off" mode, then
press the ‘F°/C°’ button. Once the desired tempera-
ture units are selected, the thermostat can be set. The
left-most button below the LCD screen, labelled
"Select", will select either the Pool or the Spa thermo-
stat when depressed. Either "Pool" or "Spa" will be
displayed in the bottom left corner of the LCD screen.
The ‘up’ and ‘down’ buttons will increase or decrease
the thermostat setting.
The Model LT heater control is less quantitative
and less automatic. The pool or spa water temperature
will need to be monitored manually when the control is
adjusted. Temperature adjustments are made by
turning the knob associated with the mode labeled
below it. Turning the knob clockwise will increase the
temperature setting. Turning it counterclockwise will
decrease the setting. Once the desired setting is
achieved, set the temperature lock by loosening the
screw located at the bottom of the knob and rotating
the dial stop counterclockwise until it contacts the
knob. Tighten the screw to lock the stop in place.
When the thermostat setting exceeds the tem-
perature of the pool or spa, the heater will fire. The
heater will fire continuously until the pool or spa water
is heated to the selected thermostat temperature. The
control will not allow the heater to fire again for five
minutes even if there is a call for heat, unless the
thermostat setting is increased. In this case, the heater
will fire within two minutes. This is to prevent short-
cycling, and thereby increase the life of the heater.
When the Model LX heater is firing, "Heating"
will be displayed underneath the LX logo. Note that in
both the "POOL" and "SPA" thermostat settings, the
temperature cannot be raised above 104°F (40°C).
Note that if power is momentarily lost, the
thermostat settings will remain the same.
Also note that the heater should not be used to
maintain water temperatures at or below 70°F (21°C).
This will damage the heater.
7.4 Lighting and Shutdown Procedures
WARNING
Do not attempt to light the heater with the door
off. Doing so may cause severe bodily injury.
AVERTISSEMENT
Ne tentez pas d’allumer l’appareil sans que la
porte soit en place. Vous pourriez être victime
de blessures corporelles graves.
Before starting your heater, be sure that all of the
functions and limits of the LX and LT controllers have
been set according to the previous section of this
manual (Section 7.3). Once the controls are set to
your preferences, follow the instructions outlined
below. Read and follow all safety instructions first. A
more detailed set of lighting and shutdown instructions
are listed on the label located on the inside of the
heater door and in Figure 26.
7.4.1 Lighting the Heater
Lighting instructions are as follows:
1. Turn off all electrical power to the heater at the
main junction box.
2. Remove the heater door and turn the heater gas
valve to off.
3. Wait 5 minutes before trying to start the heater.
4. Turn the gas valve control knob counterclock-
wise to ON (see Figure 27.)
5. Replace the heater door.
6. Turn on electrical power to the heater.
7. Turn on the filter pump.
8. Set the heater controls to the "SPA" position
(mode). If the temperature of the water exceeds
the thermostat setting it is necessary to increase
the thermostat setting to exceed the water
temperature. Adjust the thermostat setting
(desired temperature) to be greater than the
water temperature. The igniter lights the burner
when the thermostat calls for heat.
9. Set the time clock, if one is installed.
7.4.2 Shutdown
Complete shutdown instructions are as follows:
1. Set both temperature controls to their lowest
setting.
2. Press and release the mode button until the
indicators show that the heater is off.
3. Turn off all electrical power to the heater at the
junction box.
4. Open the heater door and turn the gas valve knob
clockwise to off.
5. Shut off the external gas supply valve to the
heater.
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