SALUS Controls KL08NSB Wiring Centre

Introduction

The KL08NSB wiring centre is the central component for an Underfloor Heating (UFH) control system. It facilitates easy and quick connection of thermostats and actuators, featuring integrated pump and boiler control modules, along with overload protection. The KL08NSB is designed to work with both NC (normally closed) and NO (normally open) type actuators. It supports up to 8 thermostats directly, and with the KL04NSB extension module, it can accommodate an additional 4 thermostats, totaling 12.

Product Compliance

This product complies with the essential requirements and other relevant provisions of the following EU Directives:

• EMC 2014/30/EU
• Low Voltage Directive LVD 2014/35/EU
• RoHS directive 2011/65/EU

The full text of the EU Declaration of Conformity is available at: www.saluslegal.com.

Safety Information

Use this device in accordance with national and EU regulations. It is intended for indoor use only in dry conditions. Installation must be carried out by a qualified person according to national and EU regulations.

Warning: Before attempting to set up or install, ensure the KL08NSB is not connected to any power source. Incorrect installation may cause damage to the wiring centre. The KL08NSB should not be installed in areas exposed to water or damp conditions.

Technical Information

Wiring Centre Description and Components

The KL08NSB features clearly labeled terminals and components for easy identification and connection.

Key Components:

1. Cartridge Fuse (5 x 20 mm, 12 A):

   Located under the housing cover near the power supply terminals. It protects the wiring centre and connected devices. To replace, disconnect power, remove the fuse holder with a flat screwdriver, and pull out the fuse. Use ceramic tube fast blow 250 V ROHS fuses with a nominal maximum current of 12.5 A.

   Diagram Description: A diagram shows a fuse holder being pulled out of its socket using a flat screwdriver.

2. Power Supply:

   Terminals labeled 'L' (Live) and 'N' (Neutral) for connecting a 230 V AC, 50 Hz power source. Two-wire installation must comply with applicable regulations.

   Diagram Description: A diagram shows the 'L' and 'N' terminals for the 230V AC power input.

3. NSB (Night Set Back Reduction) Function Terminals:

   Terminals for receiving an external 230 V signal (e.g., from a timer or programmable thermostat) to activate the night-time temperature reduction mode on compatible Salus thermostats (Expert NSB, HTR, BTR series). This signal reduces the setpoint temperature to an eco-mode.

4. NC/NO Jumper (Actuator Type):

   A jumper used to select the type of thermoelectric actuator connected. Set to 'NC' for normally closed actuators or 'NO' for normally open actuators. Changes to this jumper require pressing the Reset button [reset-button] to take effect.

   Diagram Description: A diagram shows a jumper block with two positions labeled 'NC' and 'NO'.

5. Delay Jumper:

   Configures the boiler off delay time. The pump and boiler start 3 minutes after receiving a heating signal. The pump stops 3 minutes after the last heating call. The boiler switches off after the time set by this jumper. Changes require pressing the Reset button [reset-button].

   Diagram Description: A diagram shows a jumper block with positions for '0 min', '15 min', and 'Off' delay times.

6. Boiler Control Output:

   A volt-free output (COM / NO) that controls the boiler. It closes (turns boiler ON) 3 minutes after receiving a heating signal from any connected thermostat. It opens (turns boiler OFF) when the last thermostat stops demanding heat, after the delay set by the Delay Jumper (item 5).

   Diagram Description: A diagram illustrates the boiler control output terminals (COM/NO) connected to a boiler, with a note referencing the boiler's manual.

7. Pump Control Output:

   A volt-free output (COM / NO) that controls the circulation pump. It closes (starts pump) 3 minutes after receiving a heating/cooling signal from any connected thermostat. It opens (stops pump) 3 minutes after the last demand for heat/cool from the thermostat.

   Diagram Description: A diagram illustrates the pump control output terminals (COM/NO) connected to a pump.

8. Actuators Connection:

   Terminal blocks for connecting thermoelectric actuators. Each zone can support up to 6 actuators (2 Watts each). For more than 6 actuators per zone, an additional relay is required.

   Diagram Description: A diagram shows terminal blocks labeled 1 through 5 for actuator connections, with an example of T30NC 230V actuators.

9. Serial Connector for KL04NSB Extension:

   This connector is used to link the KL08NSB with the KL04NSB extension module, expanding the system's capacity to support up to 12 zones.

   Diagram Description: A diagram shows the KL08NSB unit connected to a KL04NSB unit via a serial cable.

10. Reset Button:

    A button used to refresh the wiring centre's data after changing jumper settings (items 4 or 5).

    Diagram Description: A diagram highlights the small reset button [reset-button].

11. Thermostats Connection:

    Terminal blocks for connecting various types of thermostats. All thermostats must be connected using a 4-wire cable (min. 4 x 0.75 mm², max. 4 x 1.5 mm²).

    Diagram Description: Multiple diagrams illustrate thermostat connections:

    • EXPERT NSB, HTR, BTR series thermostats: Connections to 'L', 'N', 'NSB', and 'SL' terminals. Note that 'SL' and 'NSB' can be interchangeable for these series.
    • 230 V thermostat (e.g., SQ610): Connections to 'L' and 'N' terminals.
    • ON/OFF battery-powered thermostat (e.g., 091FL, RT310): Connections to 'COM' and 'NO' terminals.

    Note: A 230 V AC voltage is present when actuators are live.

NSB Function Application and Thermostat Grouping

The KL08NSB allows for flexible thermostat grouping and integration with external control signals like NSB (Night Set Back). All thermostats must be connected using a 4-wire cable (min. 4 x 0.75 mm², max. 4 x 1.5 mm²).

Connection Options:

• Option 1 (Jumper Set):

  Uses one Master thermostat (e.g., VS30 programmable) that controls both Group 1 and Group 2. Other thermostats in the groups (e.g., VS35 non-programmable) are slaved to the Master. The jumper connects terminals 1-4 and 5-8.

  Diagram Description: A diagram shows a jumper connecting terminals 1-4 and 5-8. It depicts one Master thermostat controlling two groups of thermostats.

• Option 2 (No Jumper):

  Uses two Master thermostats, one for Group 1 and another for Group 2 (e.g., two VS30 programmable thermostats). Other thermostats are non-programmable (e.g., VS35). The jumper is removed.

  Diagram Description: A diagram shows no jumper in place. It depicts two Master thermostats, each controlling one group of thermostats.

• Option 3 (External Clock - Single):

  Uses one external clock (e.g., a 230V timer) that controls both Group 1 and Group 2. This option is suitable for daily regulators (e.g., VS35). The jumper connects terminals 1-4 and 5-8.

  Diagram Description: A diagram shows a jumper connecting terminals 1-4 and 5-8. It depicts a single external clock controlling two groups of thermostats.

• Option 4 (External Clock - Dual):

  Uses two external clocks, one for Group 1 and one for Group 2. This option is used with non-programmable regulators (e.g., VS35). The jumper is removed.

  Diagram Description: A diagram shows no jumper in place. It depicts two external clocks, each controlling one group of thermostats.

Installation

Follow these steps for proper installation of the KL08NSB wiring centre.

1. Remove Top Cover: Carefully remove the top cover of the wiring centre.

   Diagram Description: An illustration shows the top cover of the wiring centre being lifted off.

2. Unscrew Main Housing: Unscrew the main housing from the rear part.

   Diagram Description: An illustration shows the main housing being unscrewed from the rear mounting section.

3. Mount Back Housing: Mount the back housing to the wall. If mounting on a DIN rail, open the hooks on the back of the housing.

   Diagram Description: An illustration shows the back housing being mounted to a wall or a DIN rail.

4. Prepare Wires:

   Identify and prepare the wires:

   • Wires for pump and boiler control (min. 2 x 0.75 mm², max. 2 x 1.5 mm² 230V).
   • Wiring centre power supply (min. 2 x 1.0 mm², max. 2 x 1.5 mm² 230V).
   • Thermostat wires (min. 4 x 0.75 mm², max. 4 x 1.5 mm² 230V).

   Remove the appropriate length of insulation from the ends of each wire.

   Diagram Description: Diagrams show the recommended wire types and lengths for pump/boiler control, power supply, and thermostats. Another diagram shows wire insulation being stripped.

5. Thread Wires (Bottom): Thread the prepared wires under the mounting belt located in the back part of the wiring centre.

   Diagram Description: An illustration shows wires being threaded under a mounting belt within the rear housing.

6. Thread Wires (Top) & Connect: Thread the wires through the designated slots in the top part of the wiring centre and connect them to the appropriate terminals.

   Diagram Description: An illustration shows wires being fed through top slots and connected to terminal blocks.

7. Secure Housing: Adjust the wires and screw the main housing back onto the rear housing.

   Diagram Description: An illustration shows the main housing being reattached and secured to the rear part.

8. Connect Actuators: Connect the wires from the thermoelectric actuators to their respective terminals.

   Diagram Description: An illustration shows thermoelectric actuator wires being connected to the terminal blocks.

9. Final Assembly & Power Up: Ensure all wires are properly connected. Mount the top cover. Power up the wiring centre; the red power indicator LED [LED indicator] should illuminate.

   Diagram Description: An illustration shows the final assembly with the top cover attached and a note about the red power indicator LED.

Note: A set of supplementary accessories is included to support the installation process.