Crouzet Controller for a heatpump

This project received 6 bids from talented freelancers with an average bid price of $1950 USD.

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We would like asap a quote for following project on a Crouzet Smart, heatpump application.

Compressor heats boiler (55°C) and water for radiant heating (35°C)


3 NTC probes (if 1 spare available, a 4th probe)

1 contact pressure protection.


If spares input available: immediate heat boiler and/or immediate engage electrical heater to support radiant heating.



3 way valve

Electrical heater

Circulation pump (water)

The available M3 Crouzet function block Heating Curve is used to adapt the water temperature to the outside temperature.

Electrical heater is used when radiant water doesn’t reach within a safety time preset temperature.

Heating of the boiler is postponed till lower night rates or immediately heated by a push button.

Once in a week, boiler is postheated by the electrical heater to avoid legionella.

On the screen, we see (eventually by scrolling down)

actual temperature boiler

Actual temperature radiant water temperature

Outside temperature

discharge gas temperature

Set value radiant

Set value Boiler

Actual hour

User can alter on the screen (eventually by scrolling down)

Set water and radiant temperature.

Change clock.

The amplification factor for the heating curve.

If the heat pumps run only on the lower night rates or continuous (on programming level, we will say in the code when lower night rates can be used, Saturday and Sunday are also the whole day lower night rates in Belgium)

When boiler will be heated (the radiant heating is stopped while we heat the boiler)

System stops when discharge temperature reaches overtemperature (set on programming level)

When radiant temperature is at set temperature, pump is stopped and compressors then runs some seconds longer (set on programming level) to pump down partially the system.

What would be the additional cost to make it possible we can monitor this via the www?

Kind regards


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