User manual

55
Service setting manual
ENG
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-
-
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


P3.3 and P3.4 for the second 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.

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

feature primary circulation of boiler water.