Biasi Activ A 18S User Manual And Installation Instructions page 6

Because every boiler is fi red and tested live at the factory, a small amount of water re-
mains within the boiler. It is possible for this water to initially cause the pump to seize. It is
therefore recommended that the pump rotor be manually turned to free its rotation before
turning the boiler on.
Remember to release the auto air purge before fi lling the boiler. See the instructions to
identify the location of this device.
This boiler allows to control the fl ow temperature of the central heating system at very
low levels. In case of underfl oor heating system a temperature limiting device (e.g. a
safety thermostat) is recommended to stop the boiler in case that the water temperature
exceeds the design temperature.
You are strongly advised to fl ush out the system both cold and hot in order to remove
system and installation debris.
It is also sensible to initially fi re and commission the boiler before connecting any external
controls such as a room thermostat. By this method if you have a subsequent problem
following the addition of an external control you can eliminate the boiler from your fault
analysis.
If the boiler is fi tted with a digital programmer, when setting the times for automatic opera-
tion, remember that for every "ON" time there must be an "OFF" time to follow and that
on every occasion you enter a time you must also indicate which days that you want the
boiler to follow the timed settings.
Some products incorporate an anti cycling time delay. It is normal when fi rst switching
the boiler on for the boiler to operate on heating for a few seconds then switch off. After
3 - 4minutes has elapsed the boiler will then re ignite and operate perfectly normally. The
ignition delay cycle does not prevent normal operation of the boiler to provide d.h.w.
If you are in any doubts as to the installation or operation of the boiler please read the
instruction manuals thoroughly and then if necessary contact Biasi UK for advice and as-
sistance.
Please remember that if you are in any doubt about the installation of this product you can
contact our Technical Helpline on tel. 0121 506 1350.
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