Topology and Examples of Using the Siemens Connected Home Smart Heating System

ZigBee router GTW100ZB Siemens Connected Home is essential for all use cases. In some cases, it may also be necessary to use wireless relay switching units RCR110.2ZB functioning as signal repeaters to ensure the stability of the ZigBee network.

Drive for Radiator Valve without Boiler Control

Heat source: Municipal or central boiler room in the building, or district heating
Heating system: Hot water radiators
Connected Home devices installed: Radiator valve drive SSA911.02ZB
Room temperature regulation and boiler control: All rooms are controlled independently.
Design variants:

• One room can have multiple radiator drives connected.
• By adding a switching unit, you can manually turn on/off hot water preparation or based on time programs set in the mobile application.

Radiator Valve Drives with Boiler (or Zone Valve or Heat Pump) Control

Heat source: Boiler, heat pump
Heating system: Hot water radiators
Connected Home devices installed: Radiator valve drives and switching unit
Room temperature regulation and boiler control: Radiator valve drives send heat requests to the switching unit, which controls the boiler. All rooms are controlled independently.
Design variants:

• One room can have multiple radiator drives connected.
• The switching unit allows manual on/off control of hot water preparation or based on time programs set in the mobile application.

Heating Controlled by a Thermostat Located in a Reference Room

Heat source: Boiler, heat pump
Heating system: Hot water radiators
Connected Home devices installed: Wired thermostat RDZ100ZB or wireless thermostat RDZ101ZB and switching unit (if RDZ101ZB is installed)
Room temperature regulation and boiler control: All rooms are heated according to the temperature in the reference room.
Design variants:

• The thermostat is connected either directly to the boiler or controls the boiler through a wireless thermostat switching unit.
• Adding a switching unit allows manual on/off control of hot water preparation or based on time programs set in the mobile application.

Combination of Thermostat and Radiator Valve Drives

Heat source: Boiler, heat pump
Heating system: Combination of hot water radiators and underfloor heating
Connected Home devices installed: Wired thermostat RDZ100ZB or wireless thermostat RDZ101ZB, radiator valve drives, and switching unit (if RDZ101ZB is installed)
Room temperature regulation and boiler control:

• All radiators are equipped with thermostatic valve drives, and underfloor heating zones are controlled by thermostats.
• Rooms are controlled independently.
• The boiler is controlled by the switching unit, which considers the heat demand from both radiator valve drives and thermostats.

Design variants: The switching unit allows manual on/off control of hot water preparation or based on time programs set in the mobile application.

Zones Controlled by Multiple Thermostats

Heat source: Boiler, heat pump
Heating system: Zones with hot water radiators controlled by zone valves
Connected Home devices installed: Wired thermostats RDZ100ZB and switching unit
Room temperature regulation and boiler control: Each zone is independently controlled by a separate thermostat. The boiler turns on when the switching unit receives a heat request from any thermostat.
Design variants:

• The switching unit allows manual on/off control of hot water preparation or based on time programs set in the mobile application.
• Wired thermostats can be replaced with wireless thermostats connected to switching units configured as thermostat switching units.

Zones with Underfloor Heating

Heat source: Boiler, heat pump
Heating system: Underfloor heating
Connected Home devices installed: Wired thermostats RDZ100ZB and switching unit
Room temperature regulation and boiler control:

• Each room is controlled by a thermostat that controls the valve of the underfloor heating loop.
• Each room can be controlled separately.
• The boiler turns on when the switching unit receives a heat request from any thermostat.

Design variants:

• The switching unit allows manual on/off control of hot water preparation or based on time programs set in the mobile application.
• Wired thermostats can be replaced with wireless thermostats connected to switching units configured as thermostat switching units.

Combination of Underfloor Heating and Radiators

Heat source: Boiler, heat pump
Heating system: Combination of hot water radiators and underfloor heating
Connected Home devices installed: Radiator valve actuators, wired thermostat RDZ100ZB, and switching unit
Room temperature regulation and boiler control:

• All radiators are equipped with thermostatic valve actuators, and underfloor heating is controlled by zone valves controlled by thermostats.
• Rooms are controlled independently.
• The boiler is controlled by the switching unit, which takes into account the heat demand from both radiator valve actuators and thermostats.

Design variants: The switching unit allows manual on/off control of hot water preparation or based on time programs set in the mobile application.

System with Radiators Under Cover

Heat source: Boiler, heat pump
Heating system: Hot water radiators, hot water radiators with covers
Connected Home devices installed: Radiator valve actuators, wired thermostat RDZ100ZB, and switching unit
Room temperature regulation and boiler control:

• Temperature measurement on a covered radiator is not accurate.
• It is recommended to use a wired thermostat that will control the thermo-electric actuator of the radiator valve.
• The boiler is controlled by the switching unit, which takes into account the heat demand from both radiator valve actuators and thermostats.

Design variants: The switching unit allows manual on/off control of hot water preparation or based on time programs set in the mobile application.

Select suitable Siemens Connected Home system components