That was my next question, anyone know what the connector would be be on the FTC? I have a connector that came with the pump.
BTW my pump is a DUCA TF110
I guess the question we’re all interested in is whether controlling the pump speed via the Ecodan improves performance.
If it does it dynamically based on whatever sensor inputs are deemed relevant then you’d like to think so but if it’s just a means of setting the pump speed on a 1-5 scale probably not.
No I’m fairly sure I’d doesn’t do anything intelligent, just a way to adjust the pump from the controller.
However it does give 5 levels whereas on the pump I can only select 3. And possibly more significantly you can set a different pump speed for DHW and heating.
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Only just picked up this thread.
My pumps are driven via the FTC controller - I have a Low Loss Header (though don’t think I need it!), so there are two pumps. As installed, the pumps were not being speed controlled from the FTC. I have added an PWM control cable (there is terminal block in the FTC controller) and connected this to the primary pump. As John said there is no dynamic control of the pump, but I wanted to set a different speed for DHW and heating as I think the pump is running too fast when heating (becuase of the LLH) but if I set the speed down then it struggles with the DHW circuit (probably becuase I have an undersized coil). As others have observed there are settings to do this from the controller. However, I’m unconvinced it actually works as there’s no obervable change in flow rate with different settings in the controller. I’m planning to stick an oscilloscope on the output, but it’s one of those things I’ve not got round to yet!
Regrads
Rachel
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How did you identify the plug to use for the terminal block or did you just solder straight to the pins or something else?
I guessed - it took 2 goes! 
.
The ones I have aren’t quite right, but they do fit and make contact. I’m away at the moment but will try to dig out the type when I’m home. However, I’m unconvinced that the PWM output on the FPC controller actually does anything!
R
| ajdunlop Andrew Dunlop
19 September |
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Rachel:
I have added an PWM control cable (there is terminal block in the FTC controller) and connected this to the primary pump.
How did you identify the plug to use for the terminal block or did you just solder straight to the pins or something else?
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