Introduction:

Many installers struggle with connecting SALUS wiring centres (KL06 230V or KL0624V) to a heat source (boiler). While the wiring centre doesn’t directly control the boiler, it can do so through dedicated output modules. This article explains how to properly wire a heating zone system to control the boiler.

Models:

• KL06 230V – 6-zone centre with 230 V actuator outputs
• KL0624V – 6-zone centre with 24 V outputs (has built-in transformer)

Direct boiler connection is NOT possible without a control module!

Use an output module:

• PL06 – for pump OR boiler control
• PL07 – for pump AND boiler control

These modules include volt-free (dry contact) COM/NO outputs, ideal for boiler thermostat inputs.

1. Install the wiring centre, connect thermostats and actuators.
   

2. Mount PL06 or PL07 to the designated port on KL06/KL0624V.

3. Connect the COM/NO terminals to the boiler’s ON/OFF thermostat inputs.
   
4. Set jumpers:
   
1. P,1–6: choose which zone(s) will trigger heating.
   
2. 0–15: set delay (in minutes) for switching off (e.g., 10 = switch off boiler 10 min after demand stops).
   

1. The boiler doesn’t respond to heat demand
   This is often caused by a missing PL06 or PL07 module. Remember – the wiring centre itself cannot switch the boiler without a dry contact output (COM/NO) provided by these modules.

1. Boiler remains disconnected despite module being present
   Check that the COM/NO terminals from the module are correctly wired to the boiler’s thermostat input. Refer to the boiler manual to confirm correct terminal usage.

1. Boiler runs constantly, even without demand
   This is usually due to incorrect jumper settings on the module. For example, a long off-delay (e.g. 15 minutes) or a misconfigured activation zone can keep the boiler running. Reset to factory settings (P, 0) if needed

1. Fuse blows when power is connected
   This may indicate a short circuit or that too many actuators are connected to a single zone. Replace the fuse (T2A 5x20 mm) and make sure no more than 6 actuators are wired per zone. Use an external relay if needed.
   

1. Don’t wire boiler directly to zone outputs
   
2. Don’t use the centre without a control module
   

3. Don’t use third-party relays without schematic confirmation
   

1. KL06 / KL0624V = zone controller for actuators and thermostats
   
2. Use PL06/PL07 to switch boiler or pump
   
3. COM/NO terminals go to boiler’s thermostat inputs
   
4. Correct jumper settings are crucial