Bulex Thema Condens AS 48-A, Manual, Page: 180 / 199

MAKSİCONDENSE 48-65
Notes
01/2018 174 Training 0020260859_00
7.3.2.1 Check programmes
Check pro-
gramme
Description
P 00 Check programme: Purging:
The heating circuit and the domestic hot water circuit are purged via the automatic air sepa-
rator. The heating pump is cyclically actuated. See automatic purge programme for the oper-
ating sequence.
Stored time periods for automatic purging:
Domestic hot water circuit
390 seconds ; heating circuit 390 seconds .
P 01 Check programme: Full load:
The unit is operated at maximum heat load on successful ignition.
If the max. Volume flow cannot be achieved, the output is limited.
P 02 Check programme: Minimum load:
The unit is operated with a minimal heat load (ignition gas volume) on successful ignition. If
the min. volume flow cannot be achieved, the burner is not started. (Check S.85)
Automatic purge
programme Automatic check programme:
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
automatic 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 .
─ The function cannot be stopped, even by the competent person.
─ The burner does not start before the purging process has been completed.
─ 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.
─ Stored time periods for automatic purging: Domestic hot water circuit
390 seconds ; heat-
ing 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.
The check programmes are used during start-up and maintenance
in order to operate the unit in a defined condition.