4
Figure 2: Overview BUS thermostat
3 Operating
modes
The operating mode for the respective modules is configured using the DIP switch S2. The combination
of the switch settings S2.1 and S.2.2 of the DIP switch S2 defines the possible functions of the modules
controlled by the BUS thermostat. The basic operating mode on the bus has to be unique.
Using the BUS thermostat as control unit of the universal control realizes the following functions:
Frost protection
- Electric defroster heater
- Brine-defroster
Supply heater
- Electric heater battery
- Water supply heater
Ground pipe diverter (Valve for ground heat exchanger - ground pipe diverter valve)
- freely configurable temperature conditions for opening and closing the ground pipe diverter valve
The BUS thermostat parameters are set using the TFT touch panel control unit. All
settings (enablings, temperature threshold, etc.) are conducted via the menu (Settings
/ Setup) and transmitted via the RS485 BUS. The temperature sensort NTC has to be
connected to X2 for temperature threshold monitoring!
Cable
connection
power supply
Holes for
fixation with
screws
RJ45
female
connector
Cable gland for sensor / actuators
Terminal X2
1 analog input for sensor / 1 analog output for actuator
Holes for
fixation with
screws
Terminal X1
Module connection / 2 digital inputs for actuators
Cable
connection
module