5.3 Determination of the quantity of heat
5.3.1 Assembly Information
The contact sensor and the line regulating valve must be positioned in the direction of flow downstream of the
circulating pump and immediately upstream of the return connection of the boiler. Additional contact sensors
and line regulating valves are required for boilers without return temperature control or return temperature
control with thermal valve. A return feed sensor is already fitted on the return temperature control with 3-way
mixing valve, which means that only the line regulating valve is required additionally.
Wood chip and pellet boiler T4e / PT4e
The return temperature control comes fitted with a 3-way mixing valve. The corresponding return feed sensor is
already wired to the wood chip module. The position in the boiler is specified for the installation of the line
regulating valve. Please refer to the information in the installation instructions for the boiler.
P
W
M
0-10V
Return temperature control with mixing valve (factory fitted)
Boiler
Return feed sensor
Line regulating valve Circulating pump
speed-controlled
3-way mixing
valve
Components integrated in boiler!
5.3.2 Functioning and configuration
Software version V50.04 – B05.19 at minimum is required for the heat quantity calculation to work. The
difference between the boiler temperature and the boiler return temperature as well as the flow of the circulating
pump are used to calculate the heat quantity.
Calculating the feed output of the circulating pump
Boiler with 3-way mixing valve
❒ Set mixing valve to manual operation and turn the lever to the central position
❒ Activate the circulating pump in manual operation with 100% speed
❒ Press the push bar on the line regulating valve; make a note of the flow on the scale
❒ Activate the circulating pump in manual operation at 50% speed
❒ Press the push bar on the line regulating valve; make a note of the flow on the scale
5
FAQ
Determination of the quantity of heat
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