Heating or cooling module

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), pumps, 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 heating or cooling system. When the module receives a heating or cooling request from the Niko Home Control thermostat in one of the zones or rooms, the H/C contact of all the modules will be closed which then activates the central boiler or cooling unit. The most centrally located boilers or cooling units are fitted with an input contact (e.g. a telephone or boiler contact) for this purpose. If not, a special regulation module will be added to the central boiler or cooling unit. In installations with a hot water reservoir, the circulation pump will be activated.

To avoid conflict in the installation, the module takes into account the opening and closing times of the zone valves as well as the lag time of the heating or cooling system .

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

Sizing

Each module controls the heating or cooling in four different zones or rooms but cannot perform both functions at the same time. Two separate modules will be required to use the heating function at the same time as the cooling function. One extra module is required for every four additional zones or rooms to be heated or cooled.

A maximum of 12 zones or rooms can be heated and cooled. In other words, a maximum of six modules can be used per installation.

If a heating or cooling request is received for one of the zones, the H/C contacts of all modules will be closed.

This setting cannot be changed.

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.

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 heating manifold 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, pumps, 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.
• The cooling unit must have a potential-free input contact.
• If you are using electric heating units or individual cooling units, the H/C contact has no function.

3    Connect 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, pumps, 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 applies to all valves connected to the heating or cooling module. Choose similar valves for each output.

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.

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 4U
• sliding contact to connect the module to the following module on the DIN rail
• CE marked
• ambient temperature: 0 - 45 °C