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Description

The heating or cooling module controls the heating or cooling in four zones or rooms.

Overview

Operation

The module has four outputs to operate control valves (e.g. zone valves at 230 V AC or 24 V DC), electric heating units or
individual cooling units (e.g. air conditioning units or fan convectors) in four different zones or rooms. This allows you to apply
different heating or cooling settings to each one of the four zones or rooms fitted with a Niko Home Control thermostat.
The module uses one output to control the circulation pump or heating or cooling system. The relevant contact is closed
when the module receives a heating or cooling request from the Niko Home Control thermostat in one of the zones or
rooms. In installations with a hot water reservoir, the circulation pump will be activated.
The module takes the opening and closing times of the zone valves into account as well as the lag time of the heating or
cooling system to avoid conflict in the installation.


The module does not change the settings of the heating or cooling system


Dimensioning

Each module controls the heating or cooling in four different zones or rooms.
One extra module is required for every four additional zones or rooms to be heated or cooled. A maximum of 20 zones or
rooms can be heated and cooled. In other words, a maximum of ten modules can be used per installation.
You can determine in the programming software which contact (output contact 1-4 or H/C contact) must be closed for a
particular heat or cold request.


Permitted loads

The module is suitable to switch potential-free boiler contacts. Check the table below to find out the maximum load for
each type.

Type of loadMaximum RMS current
Inductive load (circulation pumps ... )6A
capacitive load10A
Resistive load (electric heating units ..)16A


Installation

Contact the HVAC installer prior to commencing the installation process. The installer will provide the heating or cooling
system with control valves (e.g. zone valves at 230 Vac or 24 Vdc on the heat collector or radiator) and will verify which
type of contact to use for the connection of the central boiler or cooling unit. Furthermore, the installer will ensure that the
central boiler or cooling unit (boiler, control or telephone contact, etc.) or the circulation pump can be connected. Contact
the manufacturer of these systems for more information on how to properly adjust the settings.

Connection diagrams


Ensure that the installation is disconnected from the power mains when setting up the electrical cabinet.
Follow the steps below to install the module:

  1. Press the switching module onto the DIN rail until it clicks into place.
  2. Connect the control valves, electric heating units or individual cooling units (e.g. air-conditioning units or fan convectors) to screw terminals 1’-4’. Ideally, a dedicated control unit is used for the cooling unit.

    • All four connections must use the same voltage. Do not use both 230Vac and 24Vdc on the same module.
    • The module can control a maximum of 16 A of power. If the electric heating unit uses more power, you will need to use an external relay contact.
    • If you are using electric heating units or individual cooling units, the H/C contact has no function. Electric heating units can also be connected with a three or six-fold switching module.
  3. Connect the circulation pump, the boiler or cooling unit to screw terminals H/C’.
  4. Depending on the heating or cooling system used in the home, you need to connect the safety extra-low voltage (SELV) to screw terminals H/C or connect screw terminal H/C to the screw terminal next to it.
  5. Connect the safety extra-low voltage (SELV) for the control valves, electric heating units or individual cooling units (e.g. air conditioning units or fan convectors).

    Zone valves on 24 Vdc should not be powered by the bus power supply.
  6. Connect the heating or cooling module to the module before it. Slide the sliding contact of this module to the right until it clicks into the heating or cooling module. This will ensure that the bus and the power supply voltage are connected


Programming the heating or cooling module

Use the programming software to change the following settings for the heating or cooling module.

The response time of the control valves connected to outputs 1' - 4'
What is this?The time required for the control valves to open of close
Why is this necessary?

To avoid conflict with the central boiler of cooling unit

The module first opens the control valve for the zone specified before activating

the central boiler or cooling unit

Standard setting1 minute
DetailsIf you are using electic heating units or individual cooling units, the response time must be zero
The response time applies to all valves connected to the heating or cooling module. Choose similar valves for
each output.
Lag time of the central boiler or cooling unit
What is this?The time required by the cental boiler or cooling unit to stop heating or cooling
Why is this necessary?

To release residual heat or cold

The control valve for the zone will remain open for the time selected to allow the

central boiler or cooling unit to release its residual heat or cold

Standard setting3 minutes
Details

If you are using electric heating units or individual cooling units, the lag time must
be zero.
If the central heating or cooling unit is fitted with a circulation pump, the lag time
must be zero.


Error codes

When the module is functioning properly, the STATUS LED will light up in TEST mode only. If one or several errors occur,
the LED will blink to indicate the error code of the error with the highest priority. The table below provides an overview of
all error codes.


LEDACTIONERRORPOSSIBLE SOLUTIONS
STATUS LEDBlinks - one pulse per two secondsSoftware error

Incorrect software version.*
*Download the latest software version
from the Niko website to upgrade the
module.


Technical data

  • each zone or room should be equipped with a Niko Home Control thermostat
  • maximum current per module: 16 A
  • screw terminals for controlling 4 zone valves at 230 Vac or 24 Vdc (do not mix per module)
  • 2 x 7 screw terminals for 3 x 1.5 mm² or 2 x 2.5 mm² or 1 x 4 mm²
  • dimensions: DIN 4E
  • sliding contact to connect the module to the following module on the DIN rail
  • CE marked
  • ambient temperature: 0 - 45°C


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