9
Figure 8: Water supply heater configuration.
3.3 Ground pipe diverter (Valve for ground heat exchanger - ground pipe
diverter valve)
The ground heat exchanger can have two functions, heating or cooling. Two different temperature
thresholds can be defined for both functions (ref. to menu settings/Ground pipe diverter)
The motorized ground pipe diverter valve for outdoor air intake regulates either the outdoor air intake via
the ground heat exchanger or the direct outdoor air intake. This switch of the 2-way bypass valve is
realized by a servomotor, which is controlled by the BUS thermostat.
The temperature sensor NTC is an
outdoor air temperature sensor
, installed at a sun-protected place.
The switch of both position is depending on if mains voltage on L1 is output or not. The BUS thermostat is
able to control motors like "Belima LMC230 -F-CS".
Maximum switching capacity 20 W!
Both enabling contacts RTH and STR are not evaluated.
The combination of switch settings of the DIP switch S2, the terminal configuration X1 and X2 for control
of the servomotor valve is shown in figure 9.