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LX and LT Pool Heaters
Page 15
Table 6. Chemical Concentration Levels
Test Recommended Level*
Free Chlorine or 1.0 to 3.0 ppm
Total Bromine 2.0 to 4.0 ppm
pH 7.2 to 7.6
Total Alkalinity (TA) 100 to 150 ppm
Calcium Hardness (CH) 200 to 400 ppm
Langelier Saturation Index (SI) -0.5 to +0.5
Cyanuric Acid 30 to 150 ppm
Total Dissolved Solids (TDS) Less than 1500 ppm
Copper 0 ppm
*As recommended by IPSA
2J. Start-up and Adjustment
2J-1. Normal Operation
The LX and LT heaters are capable of automatic
operation based on a call for heat at preset temperatures
and an operator selection between pool or spa settings.
Additionally, the heater may be controlled by a remote unit
to anticipate bather load, changes in temperature settings,
or a variety of other demands that might be encountered.
The heater has an internal safety system which allows
operation in a variety of conditions and prevents operation
when certain adverse conditions are encountered. The
heater is capable of diagnosing problems within the safety
controls scheme, enabling faster service and less down
time in the event of a failure.
When the heater is powered, water is flowing
through the heater, and the water temperature entering the
heater is below the temprature control setting, the heater is
ready to ignite. The combustion fan is powered and if
airflow is proved adequate the igniter comes on 45 seconds
into the call for heat. At 60 seconds into the call for heat,
the gas valve opens and gas flows to the burners.
If ignition is unsuccessful, or if the flame fails
during normal operation, the ignition control shuts off the
gas valve. It imposes a post purge and two more ignition
cycles, and it shuts down the system if ignition is not
achieved in three cycles.
To reset the model LX for another three cycles, press
and release the mode button until the indicator on the LCD
screen aligns with "OFF". Now press and release the
button again until the indicator on the LCD screen aligns
with the desired setting, either "POOL" or "SPA".
To reset the model LT press and release the mode
button until the indicator lights for the "SPA" and "POOL"
settings are off. Then press and release it again until the
indicator light for the desired setting is back on.
13. Reinstall the adapter, with the PRV, into the plastic
threaded hole and tighten it until the mark on the
adapter is once again facing the same direction as the
water connections on the header.
Do not use any pipe compound or pipe dope
on the threads of the adapter or any part that
comes in contact with the plastic headers.
These compounds may damage the header
over a period of time.
DO NOT TIGHTEN WITH A WRENCH.
Overtightening may crack the header. Route the discharge
piping so that steam from the pipe does not endanger
anyone near the heater. Refer to your local installation
codes for more detailed information. The valve setting
should be at or below the maximum working pressure of
any component in the filter system. The working pressure
of the LX heater is 75 psig.
2I-5. Automatic Chlorinators
(Chemical Feeders)
A high concentration of chlorine (and many similar
chemicals) in the pool heater can be very destructive.
Heater damage caused by chemical concentration is not
covered by the Waterpik Technologies Warranty. See
Table 6 for guidelines on pool water chemistry.
IMPORTANT: If an automatic chlorinator is
being used, equip the chlorinator with an anti-
siphoning device so that chlorine will not siphon into
the heater after the pump shuts off.
Wire an electric chlorinator so that it cannot operate
unless the filter pump is running. If the chlorinator has an
independent clock control, synchronize it with the filter
clock.
Always install a chlorinator so that it introduces the
chlorine downstream from the heater, and, if possible,
below the level of the heater outlet fitting.
CAUTION