Single switch or Smart Module to control a pump

[Patryk Kopaczewski 4]

Hello, it has been days I am thinking how to do this but I can't find a solution.

The heat pump is giving power to 3 water pumps for floor heating, one per each zone.
Often a zone is warm and the valves are closing. I can't stop only that pump.
 

So I was thinking to use a Fibaro device to do so with some conditions (all floor valves status and thermostats are connected to Home Center).
So when a zone is warm, I want to cut power to one of the pumps.
The other two pumps should be ON only IF the heat pump is feeding with 230V.

 

I was thinking about a single switch per each pump.
But I can't power it with the het pump cable or it would go on and off losing connection.
I can power it from a home cable (and turn on and off its pump) but then how can I know if the heat pump is requesting the pump to work or not (I only know it from its 230V cable).

I need one power source (home) to power the Fibaro device and another power source (heat pump cable) to give me an information.

Thank you

Edited December 1, 2025 by Patryk Kopaczewski

[Martin_N 154]

@Patryk Kopaczewski

Hi.

Interesting issue.

If it is as I think (probably the meaning will be lost in translation), you need to control 3 circulation pumps separately based on some events/rules that you define in HA.

You can use these modules for control (triggering) provided that:

1) you do not exceed the maximum permissible load per channel

2) you maintain a permanent power supply to the module

 

I will elaborate on point 2) - provided that the circulation pump is powered by 230VAC, the instruction from the heat pump is 230VAC, or a dry contact.

 

All you need to do is find a permanent power supply somewhere nearby (socket,...).

Then you connect the modules to L and N for power and you will control them only wirelessly.

The voltage for the circulation pumps will then be used right from the circuit of that socket.

If you plan to control some of the circulation pumps by command from the heat pump, I recommend using the FGS-224 module, where you can separate the power and switching circuits.

However, I would recommend separating the switching circuit by inserting an auxiliary relay. You connect the coil of this relay to the command from the heat pump. The relay contact will then connect S1 to the L module.

If the heat pump provides a dry contact for further control, there is no need for a separating relay.

I am writing everything with the assumption that you will use different 230VAC circuits, so it is advisable to take care of these conditions.

 

And my favorite recommendation.

If you are not sure what you are doing, you do not have electrical qualifications, leave the work to professionals. It is a matter of life or property!

 

eM.

[cag014 731]

On 12/1/2025 at 5:18 PM, Patryk Kopaczewski said:

I can power it from a home cable (and turn on and off its pump) but then how can I know if the heat pump is requesting the pump to work or not (I only know it from its 230V cable).

You can connect the 230V output from the heat pump to all Fibaro devices as a switch input. When the devices are switched on, that signal can serve as a trigger for deciding whether to turn them off or not.

Another idea is to add a fourth Fibaro device connected to the heat pump (using the same switch input). Once it turns on, you can then decide which circulation pump should be activated.

 

see below: 230V input from heat pump marked red 

 

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Edited December 5, 2025 by cag014