Application Examples; Heating System With Mix Of Wireless And Wired Room Units (Up To Eight Rooms) - Rehau NEA SMART 2.0 Service Manual

The polarity of the System Bus (SYSBUS) must be
maintained at all times. Switched polarity may result in
damage to the base stations and/or U-Modules.
If the existing wiring of previously installed 24 V or 230 V room
thermostats is used, it is very important to ensure that the
existing lines are fully disconnected from the mains power.
A 230 V power supply voltage and 24 V voltage must not share
the same line.
You must always observe country-specific standards and
regulations!
5.6.1

Heating system with mix of wireless and wired Room units (up to eight rooms)

Fig. 5-2 NEA SMART 2.0 system, room control for heating
Zone bus (ZOBUS) to connect the Room unit
ZOBUS
1 NEA SMART 2.0 Base 24 V, central control unit (master);
for up to eight rooms
2 NEA SMART 2.0 Transformer 24 V
3 Thermal actuators 24 V on manifold
4 NEA SMART 2.0 Room unit, wired
Tab. 5-10 Heating system with mix of Room units up to 8 rooms
44
5.6

Application Examples

General Remarks
The following chapters show typical applications for 24 V installations.
They are meant to give a general overview of the system structure.
More detailed design can be found in the chapter "Schemes".
5 NEA SMART 2.0 Room unit, wireless
6 LAN/WLAN interface to connect the system to router and cloud
7 Router for LAN / WLAN home network and connection to cloud
8 Output signal from the Base to heat generators
9 Output signal from the Base to pump