SG contacts regulate the heat pump via Reduxi Gateway relay outputs. Leveraging flexible heat pumps, we can cut electricity costs by 30%.

1. Components for establishing a connection between Reduxi controller and Kronoterm heat pump

To establish the connection between the Reduxi controller and the Kronoterm heat pump, we need:

1. I brought back the Controller
2. Reduxi Gateway with 3x30 current sensors

To commission the heat pump, it is necessary to add a Reduxi Gateway device to the Reduxi controller. The connection can be wireless (WLAN) or wired via a UTP cable (LAN). You can find more about the connection at the Gateway to Controller link. The Reduxi Gateway with 3x30 current sensors contains three current sensors, which are used to cover the phase conductors of the heat pump, and two relay outputs, which are physically connected to the SG-ready contact of the heat pump. 

A symbolic picture of the entire connection from the controller to the heat pump:

For the physical connection of the relays to the heat pump, it is necessary to check where the SG contacts are located on the heat pump circuit, as shown in the figure below for the example of the SG contacts of the Kronoterm heat pump.

The SG contact on the digital input D5 is intended to reduce the operation of the heat pump.

The SG contact on the digital input D8 is intended to increase the operation of the heat pump.

2. Connecting the Reduxi Gateway to the local Internet network

• Plug the AC-DC adapter into the Reduxi Gateway and then plug the adapter into the mains. The first LED from the top should start to glow green.
• Go to the network settings of your WiFi networks on your mobile device or computer and connect to the "Gateway" wireless network. 
• If the popup does not appear automatically, open your browser and go to http://gateway.local 
• Use username "admin" and password "admin" to log in. 
• Set up a wired or wireless network and connect Reduxi to your local network (we recommend setting a static IP address).
  • Set up a wired network if you are using an Ethernet cable to connect to your local network.
  • If you use a WiFi network to connect to a local network, set up a wireless network.
• Click "save" and now connect your mobile phone or computer to the same wired or wireless local network that you previously connected the Reduxi Gateway to.
• The Reduxi controller must be previously connected and connected to the local Internet network ( Reduxi Controller ). 
• Follow the following chapters for connecting the relay outputs and installing the current sensors. 

3. Binding of Reduxi gateway relays to SG contacts

The relay outputs from the Reduxi gateway are connected to the SG contacts as shown in the symbolic picture below.

Warning: The Reduxi Gateway device allows the use of relay outputs that are permanently closed " Normally Closed - NC " or opened " Normally Opened - NO ", whereas in the case of heat pump Kronoterm, we use NO contacts.

4. Reduxi Gateway current sensors

Current sensors are used to control the flow of electrical energy of the heat pump, where the power of the heat pump is measured in real-time. The current sensors are included in the kit with the Reduxi Gateway device and need to be connected to three inputs for each phase, as shown in the picture below. 

The current sensor covers the individual phase (L1, L2, L3) of the heat pump, picture below:

5. Adding heat pump as a new device via the Reduxi configurator.

To add a new heat pump as a device or to edit an existing one, the following steps are given, for which an individual point is presented.

5.1 Adding a device

Log in locally to the Reduxi configurator application on the controller and press the Add device button.

5.2 Select the device you would like to add

In the first step, select the basic parameters of the device you want to add:

• Device type: HVAC,
• Tip: Redxi Meter
• Name: Specify the name of the device.

5.3 Basic settings

The basic settings menu gives three options, fill in the fields as shown in the image below, and name the last field as you like.

5.4 Communication channel

The first part of the communication channel is intended for connection to the Reduxi Gateway device. Fill in the fields as shown in the image below (automatically filled).

Explanation of each setting of the second part of the Communication channel:

The second part of the communication channel is intended for the current sensor settings of the Reduxi Gateway device, where we choose "Auto detect from gateway" for all current sensors. 

Next, set the states OFF, ECO, ON, and BOOST of heat pump, which are defined by the states of the relays on the Reduxi Gateway device. We have to define 4 different combinations or 8 different relay layout settings. 

5.5 Communication test 

The communication test is carried out with the help of the "Test communication" button, located on the lower right side after all the parameters fields of the communication channel.

The communication test can return two answers:

1. Communication is working properly, picture below:

2. Communication is not working properly, the picture below:

5.6 Advanced Settings

The advanced setting is arbitrary and depends on the specific needs of the location where the Reduxi controller is installed. After finishing all the advanced settings, press the "Done" button on the lower right side.

5.7 Last measurements

After successfully establishing communication with the device, we can check the values ​​on the device as an additional test. This is done by clicking on the device selection on the home screen, where we choose the new add heat pump in the tree structure. 

If we want the device to be managed by a strategy, the management mode must be set to "Automatic", but if we switch to manual mode, we can test the operation of different states. 

After successfully adding the device and checking the values, the device can be inspected and controlled via the Reduxi application.