OEG KSF-Pro Mode D'emploi page 55

BASIC oPERATIoN DESCRIPTIoNS
MIxING hEATING CIRCUIT
Stand-pipe temperature calculation
The upper limit of stand-pipe temperature calculation is set with maximum stand-pipe
temperature - parameters S2.6 and S3.6, lower limit is set with minimum stand-pipe tem-
perature - parameters S2.5 and S3.5. Parameters S2.1 and S3.1 are used to set the influ-
ence of room temperature deviation on the calculation of stand-pipe temperature, and with
the parameters P2.2 and P3.2 you can adjust the parallel shift of heating curve.
heating switch off
If the calculated stand-pipe temperature isn't for few °C higher than the room temperature,
the heating is automatically switched off. Heating is automatically switched off if room
temperature is not measured and when the outdoor temperature approaches the required
temperature. The temperature difference between calculated stand-pipe temperature and
room temperature at which the boiler will switch off can be increased or decreased with
parameters S2.13 and S3.13.
At automatic heating switch off, a temperature of 4 °C is set for stand-pipe temperature and
the circulation pump is switched off with delay - parameters S2.16 and S3.16. Other pump
operation modes can be selected with parameters S2.4 and S3.4.
Intensive - BooST heating
Define time and intensity of intensive (BOOST) heating, which is activated at transition of
time program from night to day heating interval with parameters P2.3, P2.4 for the first and
P3.3 and P3.4 for the second heating circuit.
Limitation of ΔT or power of first heating circuit
To limit the maximum power of the heating circuit, use the T1 or T8 sensor, to measure the
return-pipe temperature. Set the parameter S1.4=3 or S1.5=6, then set the maximum dif-
ference between stand-pipe and return-pipe temperature with parameter S2.14.
Limitation of ΔT or power of second heating circuit
To limit the maximum power of the heating circuit, use the T8 sensor, to measure the
return-pipe temperature. Set the parameter S1.5=3, then set the maximum difference be-
tween stand-pipe and return-pipe temperature with parameter S3.14.
Limitation of return temperature into the boiler
Install T1 or T8 sensor into the return-pipe into the boiler and set parameter S1.4=9 or
S1.5=12. If return-pipe temperature drops below the minimum temperature - parameter
S5.14, the mixing valve will gradually close. This action relieves the boiler and prevents
condensation in boiler fireplace. To assure proper operation, the hydraulic connection must
feature primary circulation of boiler water.
Service setting manual
55