Connections to Third-Party Systems
Connections to Third-Party Systems
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Remeha: Wired connection - Multi-zone heating/cooling

What do you need?


In short

Extra information

General

Specific electrical wiring is required.


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Your Niko Home Control installation meets the following requirements:

  • It has a connected controller II.

  • It is configured with the most recent programming software (version 2.17 or higher).

You need the following if you want to use the Niko Home control multi-zone thermostat control:

  • a switching module for Niko Home Control (550-00103 or 550-00106) with one free output

  • a digital potential-free sensor module for Niko Home Control (550-00210) with at least one free input

  • a heating or cooling module for Niko Home Control (550-00150) (per four zones, an extra module is needed)

  • one thermostat per zone:

    • a Digital black, 24 V (550-1800X)

    • a push button with LED(s) and comfort sensors
Logo Viessmann

Your partner system meets the following requirements:

  • It is a Remeha heat pump system that supports:

    • heating only

    • heating/cooling

  • It has a buffer tank

The X1 output contact on the SCB-01 board indicates whether the heating/cooling mode is active.

The R-bus input contact on the EHC-05 Neptuna PCB is used for the Heat/Cool demand.


Wiring diagram for multi-zone heating/cooling

The table below shows how you can use Niko Home Control with your Remeha system and enable Niko routines.

Niko Home Control set-up

Wiring diagram

Enable a Niko routine with a partner

Multi-zone heating/cooling –
The heating/cooling mode switchover is initiated by the partner system
(pump control not needed)

EHC-05 Neptuna PCB:

Wiring diagram Remeha

SCB-01 board:

Wiring diagram Remeha

The R-bus input on the connector X12 of the EHC-05 Neptuna PCB is used for Heat/Cool demand. You need to connect the 2 inputs of that R-Bus to the H/C output and common  of the NHC HVAC module


The X1 output contact on the SCB-01 board indicates whether the heating/cooling mode is active. You need to connect the NO and the Common outputs from the X1 contact to an input and common of the Niko Home Control digital potential-free sensor module

Settings for multi-zone heating/cooling

To view HVAC programming examples, please see Niko Home Control programming examples.

Multi-zone heating/cooling with zone valves can only be performed if the following conditions are met:

  • The heat pump has a buffer tank connected in parallel, as well as an additional bypass circuit.

  • The heat pump only takes into account the weather-dependent control, clock program (or manual) and flow temperature T0.

  • The heat pump decides between heating or cooling, depending on the weather. The Niko Home Control thermostats must be forced/blocked in the relevant mode via the Niko Home Control digital input module connected to output X1.

    • Input closed = cooling

    • Input open = heating