Potterton eurocondense four 125 kw, Installation, Operation And Maintanance Manual, Page: 93 / 148

No: The temperature request remains unchanged. The calculated cor­
rection value is not added.
Yes: The temperature request includes the flow setpoint correction.
Operating level changeover (898, 1198, 1498)
When an external timer is used above the inputs Hx selection of the oper­
ating level to which the heating circuits are to be switched is possible.
Off
Reduced
On
Optg mode changeover (900, 1200, 1500)
With external change of operating mode via Hx it can be selected whether
during automatic operation it is changed from comfort set point to the frost
prevention setpoint or reduced setpoint.
9.2.7 Domestic water
Hot water temp setpoint (1610)
Setting the drinking water nominal value
Reduced temp setpoint (1612)
Setting the DHW reduced setpoint.
Release (1620)
24h/day: The DHW temperature is continuously controlled to the nomi­
nal drinking water temperature value independently of the time switching
programmes.
Time setting central heating: The DHW temperature will be switched
over between the nominal DHW temperature value and the reduced
nominal DHW temperature value depending on the time switching pro­
grams. Every time, the switching-on time is moved forward.
It is moved forward by 1 hour.
Time hot water: The DHW temperature is changed over between the
DHW temperature setpoint and the reduced DHW temperature setpoint
independently of time switching programs of the heating circuit. For this,
time switching program 4 is used.
Charging priority (1630)
This function ensures that the boiler capacity is primarily made available
for DHW in case of simultaneous capacity demand by room heating and
DHW.
Absolute: Mixer and pumped heating circuits are blocked until the DHW
has been heated up.
Shifting: Should the boiler capacity not be sufficient to heat up DHW,
mixer and pumped heating circuits will be restricted.
None: Charging DHW is carried out in parallel with heating operation.
MC shifting, PC absolute: Pumped heating circuits are blocked until the
DHW has been heated up. Should the boiler capacity not be sufficient,
the mixer circuit will also be restricted.
Fig.36 Release depending on the time
switching programmes of the heating
circuits (example)
RA-0000077
Fig.37 Release according to time switching
programme 4 (example)
RA-0000078
9 Settings
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