Bus Remote Control - GeoSmart NETZERO BW Manuel D'installation

Installation without interior terminals
The NETZERO heat pumps can also be used in installations that do not have any type of interior terminal to generate request signals.
In these cases, a continuous request can be imposed at the digital input of the unit to activate by selecting the appropriate control
logic in the controller. As a result, the heat pump will run the start / stop cycles according to the temperature control of the circuit
and the outside cut-off temperatures of each service.

5.14. BUS remote control

The heat pump allows the communication by MODBUS. It is allowed to send ON/OFF signals, DHW demand, POOL demand, or
different shunt groups heating and cooling demands. Also allows to modified the setpoints for DHW, POOL and for each heating or
cooling shunt groups.
Read / Write MODBUS
Table 5.12. Data bus connection terminals for data reading and writing.
Follow the recommendations below to connect the RS-485 converter.
▪
Use a three-pole, shielded AWG 20-22 cable for the connection.
▪
Connect the terminals in series for installations with more than one terminal in the network. The maximum length of the
circuit assembly should not exceed 500 metres.
▪
Configure the BMS2 address according to the settings of the controller following the steps described in the service terminal
manual.
GEOSMART ENERGY
FBUS2
Figure 5.14. Example of connection of thT terminals.
Description
32
Installer manual NETZERO
Signal
ModBus RS485
Connector
BMS2