Remeha - Wired connection - Multi-zone heating/cooling

What do you need?

In short

Extra information

General

Specific electrical wiring is required.

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

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:

SCB-01 board:

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 NHC Dig pot free sensor module

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

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