Viron Pool and Spa Heater
Page 6
If you have a salt chlorinated INDOOR pool or COVERED pool be very careful of the level of
Chlorine being produced. If you use a salt chlorinated spa be very careful of the level of Chlorine
as the Chlorinator is usually sized for the pool and therefore should be switched off when heating
the spa. Leaving the chlorinator on can raise the chlorine level very rapidly in a small volume of
water.
These comments are intended as a guide only and are not definitive answers or recommendations
on pool water chemistry. Astral Pool’s intention is to provide a little understanding of the
potential problems of water chemistry and the dangers of corrosion to heaters (and other pool
equipment and fittings).
YOUR WATER SHOULD BE ADJUSTED & BALANCED PRIOR TO ANY CORRODED
PARTS BEING REPLACED.
DIGITAL THERMOSTAT OPERATION
DESCRIPTION
The sophisticated digital thermostat provides temperature read out, set point temperature,
operating status of the heater and any fault conditions.
TEMPERATURE DISPLAY
The temperature display indicates water temperature in the inlet of the heater. Therefore the pump
must be operating for an accurate pool or spa water temperature to be displayed.
Comfortable pool temperature is between 26
˚
C and 30
˚
C. Normal spa temperature is between
36
˚
C and 38
˚
C. To select your desired temperature press the up or down button repeatedly until
the desired temperature is reached.
To prevent rapid cycling of the heater, the thermostat has an inbuilt time delay which prevents the
heater from turning on for two minutes after the set point has been reached. If the time delay is
activated, the symbol “L” will be displayed on the LCD screen on the front of the heater. This is
part of normal operation.
Should a fault condition occur, the heater will lock out and prevent further heating. A lock out
condition is indicated by the symbols F0 to F9. To reset a lock out condition, turn the power off
for five seconds.
When the water temperature is heated to within 1 degree of the thermostat set point, the Viron
burner will modulate or turn down so that the set point is accurate maintained and not exceeded.
This prevents waste of energy typically associated with on/off burners. In addition, the set point
is maintained very accurately, so the when using your spa pool, you will notice very little variation
in water temperature.
