Stiebel Eltron Heating & Cooling

This template allows you to control your Stiebel Eltron WPM >3 with the ISG Web over Modbus TCP.

- With the ISG (InternetServiceGateway) Web add-on device, compatible heatpump units from Stiebel Eltron can be connected to the Modbus TCP/IP network. - With an additional chargeable software update from Stiebel Eltron, the ISG also receives the Modbus TCP/IP interface. Newer versions of the ISG web already have this interface integrated.

The choice of paring Stiebel Eltron systems with Loxone offers the possibility of:

- integrating demand-based heating and cooling depending on e.g. presence or the protection of open windows - Active integration in interaction with e.g. PV- systems in a Loxone Energy Management - Using flexible electricity tariffs with the Spot Price Optimizer. - Use statistics ore individual notifications - Create your own individual schematics - Reduce cycles and operating hours of your Stiebel Eltron heating/cooling device. - Combining hybrid solutions e.g. Heatpump and PV- Heating element in your Hot Water Storage - Create e.g. yearly operation goals like certain annual runtime forces for hybrid systems e.g. (Heatpump 60% amount of energy, Gas heater 40% amount of energy) to fulfill the requirements of your local government. - Grid management according to §14a ENWG in Germany - In addition to the electrical power, the current and total thermal energy can also be visualized via the Loxone Energy Flow Monitor. To the compact overview for e.g. contractors. - Influence on the hot water circulation pump by controlling via the presence detectors. - Increased security through leakage detection or activation of IP cameras in the plant room.

With our step by step manual for collecting the heating or cooling demand and forwarding it to the WPM e.g. ISG, we enable the interaction of the individual room control with the central heating/cooling system Stiebel Heatpump. Please take a look on the Loxone Config sample file in the Library download area.

Structure:

Stiebel Eltron helpcenter, download area and Compatibility:

- If you need technical datas from the WPM heatpump manager, please follow the link to the Stiebel Eltron WPM International.

- If you need technical datas from the ISG web, please follow the link to the Stiebel Eltron ISG Web.

Various documents are only accessible to Stiebel Eltron specialist partners. In this case, please contact your Stiebel Eltron partner or salesperson.

- If you need the modbus instruction that is locked on the download center, please take a look in the download area of this template. The current document version must be cross-checked with the Stiebel partner. - Before purchasing the ISG gateway, please discuss the Compatibility with your Stiebel partner. There are different WPM control generations:

1. The WPM 1 +2 = was used to operate the heat pumps with ON/OFF compressors. 2. The WPM 3 was then the next generation of the WPM, with which the old heat pumps and some inverter heat pumps could still be operated. 3. The WPM i3 (the i stands for integrated) is mainly used in brine and water heat pumps. These heat pumps do not have their own IWS (electronics), which is integrated in the WPM i(iw). 4. The current WPM 4(system) can also be used for most of the old HPs. Otherwise, all inverter heat pumps are operated with the WPM 4.

Attention to Compatibility: An ISG web can be installed and operated from WPM 3 onwards, with WPM II you must check the software version to see whether an ISG can be used!

UseCase: Integration of a Stiebel Eltron WPM Residential building with heating, warm water storage and heating circuits.

- Device Heatpump WPL-A 05 HK Premium - Warm water storage tank --> Controlled by Loxone - Heating/Cooling Buffer - Mixing circuit HC1 (e.g. radiators) --> Controlled by Loxone - Mixing circuit HC2 (e.g. ceiling heating/cooling)--> Controlled by Loxone

Functional Components required for Loxone Integration in the example schematic: (All other components can be found in the diagram in the download area)