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It is essential the electrical circuit to the solar control unit is continually turned on if there is a risk of freezing.
The Aquamax warranty does not cover damage caused by freeze conditions when the electrical circuit or
electrical supply to the solar control unit is turned off or interrupted.
Warning:
If it is necessary to switch the power off to the solar control unit and there is a risk of freezing,
then it is necessary to have your plumber drain the solar collectors and solar flow and return pipe work.
Turning On the Solar Water Heater
To turn on the solar water heater:
1.
Fully open the cold water isolation valve at the cold water inlet to the solar storage cylinder.
2.
If maintenance has been conducted on the solar collectors or solar pipe work and air has entered the
system, or if the collectors and solar hot and solar cold pipes have been drained, it will be necessary to
purge the collector circuit of air which would otherwise prevent the solar water heater from operating
(refer to
“Purging the Solar Collectors” on page 9).
Note:
Air trapped in the system can prevent solar
gain from occurring and cause the system to operate on the gas booster only.
3.
Switch on the electrical supply at the power outlet to the solar control unit.
Note:
The power outlet must
be switched on for the solar control unit to operate and for solar gain to be achieved. The solar control
unit also provides additional freeze protection when energised.
4.
Turn on the gas supply to the gas booster at the gas booster
‟s gas isolation valve.
5.
Switch on the electrical supply at the power outlet to the gas booster.
Shut Down Procedure
If it is necessary to turn off the solar water heater:
1. Turn off the gas supply to the gas booster at the gas booster
‟s gas isolation valve.
2. Switch off the electrical supply at the power outlet to the gas booster.
3. Switch off the electrical supply at the power outlet to the solar control unit.
Note:
The Aquamax warranty
does not cover damage caused by freeze conditions when the electrical circuit or electrical supply to the
solar control unit is turned off or interrupted. If there is a risk of freezing conditions, then it is necessary
to drain the solar collectors and solar flow and return pipe work (refer to
“Pipe Work, Insulation & Freeze
Protection
” on page 4).
4. Close the cold water isolation valve at the cold water inlet to the solar storage cylinder.
Temperature Adjustment
The solar control unit will circulate water through the solar collectors until a temperature of 70 ~ 80°C is
reached in the solar storage cylinder. This temperature setting is non adjustable.
During periods of low solar energy gain, the gas booster will boost the water temperature automatically to its
preset outlet temperature setting which must be set by a qualified person to a minimum of 70°C (Aquamax
CF20-60 and CF26-60 model continuous flow in-series gas boosters have a factory setting of 60°C).
AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in
potable water. As this solar water heater is installed with an in-series continuous flow gas booster, then this
requirement can be satisfied provided the gas booster is energised, its preset outlet temperature setting is
70°C or higher and a remote temperature controller is not used.
Warning:
The preset outlet temperature setting of the gas booster cannot be adjusted by the
householder. This setting can only be adjusted by a qualified person.
Warning:
Temperature controllers
must not
be fitted to the gas booster because water at a temperature
much higher than the temperature controllers setting can be delivered.
Other Important Information
Going Away?
If you plan to be away from home we suggest you leave the solar water heater switched on. It is not
necessary to switch off the electrical supply to the solar control unit or gas booster.
If the system is not to be used for a period in excess of 2 weeks it is recommended that the solar collectors
be covered.
