Bulex Thema Condens AS 48-A, Руководство пользователя, Страница: 148 / 199

MAKSİCONDENSE 48-65
Notes
01/2018 142 Training 0020260859_00
6.3.4 Starting the boiler
Actuate the mains switch. The start menu appears in the display
6.3.4.1 Check programme for purging the heating circuit
Start condition and boiler purging:
If the unit/system pressure has fallen below
0.3 bar for at least 15 seconds , the point for a purging
sequence is set. The unit/installation purging is started from 0.5 bar .
If the heating pressure in the primary circuit rises above 0.5 bar for 30 seconds (start-up), an auto-
matic purging function starts. The function starts repeatedly if the system pressure has fallen below
0.3 bar for at least 15 seconds (e.g. purging of heating surfaces or other causes) during servicing
(maintenance). After filling the installation, the purging starts if 0.5 bar has been exceeded for at
least 30 seconds .
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The function cannot be stopped, even by the competent person.
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The burner does not start before the purging process has been completed.
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After the purging, no air remains in the unit, which reduces the risk of damage
caused by cavitation and of noises in the heating installation.
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Stored time periods for automatic purging: Domestic hot water circuit 390 seconds ;
heating circuit 390 seconds .
Following the automatic purging, the volume flow is measured (heating circuit or hot-water charging
circuit) to ensure that the unit has been purged. Purging is completed when the threshold of the low
volume flow (Lower Flow Rate) has been exceeded.
If the threshold has not been exceeded, the purging function was not fulfilled and
fault F.75 is displayed.