15
When you have selected the desired manual functioning mode, place your finger on the On touch
button again to record the value and exit the "
HN
" setting. Operating modes 0, 1 and 2 will remain
activated indefinitely, until another operating mode is selected (even if the boiler is switched off
and switched on again). However, for safety reasons, manual modes 3 and 4 will only remain active
while they are selected, and the "
HN
" setting cannot be exited until another mode is selected (if the
boiler is switched off at this point, it will return to automatic operating mode when it is switched on
again).
IMPORTANT: The solar circuit must only be serviced and installed by sufficiently qualified
personnel, in accordance with current national and local installation and safety
legislation and standards.
5.7
Starting up the solar pump with timer
For correct system start-up, the solar circuit is equipped with 2 circulation pumps, one of which has
a timer (BST). When the system has started up, after ensuring that the heat-carrying liquid is flowing
through the whole circuit and when the flow is stabilised (15 minutes by default), the electronic
control switches off the pump with a timer, as one pump is sufficient to maintain the flow, thus
optimising the electricity consumption of the solar circuit.
To change the switch-off time for the pump with a timer, use the MODE touch button to browse to
the
"Switch-off time for solar pump with timer"
display option. When this option is displayed, touch
the "+/-" symbols on the touch button on the right of the display
(27)
to select the desired time. The
switch-off time can be adjusted between OFF and 5 and 30 minutes. To disable the switch-off
function for the pump with a timer, select "
OFF
" for the pump to remain continuously switched on
while there is solar energy.
IMPORTANT: The solar circuit must only be serviced and installed by sufficiently qualified
personnel, in accordance with current national and local installation and safety
legislation and standards.
5.8
Checking the solar circuit seal
For the solar circuit to function correctly, it is very important to ensure it is correctly sealed. To do
this, switch on the two solar pumps in manual mode by selecting value “2” on the “
HN
” setting on
the digital display (see “S
olar pump functioning in manual mode
”).
After 15 minutes have elapsed and with the pumps still switched on, check there are no leaks
anywhere in the solar circuit. Make sure no siphons have been created in the installation, as this
would prevent correct drainback of the solar circuit.
IMPORTANT: Insufficient sealing of the solar circuit and a siphon effect caused by incorrect
layout of the piping can cause serious operating problems.
