Vaillant AroTherm 7kw ASHP controller and Immersion Heater?

[myatix]

Hi All,

I am currently installing a Vaillant AroTherm Plus 7kw Heat pump with a custom built cylinder. Can anyone tell me where I connect the immersion heater??? I have had a look at Vaillants schematics and it’s not clear to me?

I am also a little unsure about the secondary circulation pump that come with it’s own pipe temperature sensor. Where should I connect that on the controller???

Any help would be greatly appreciated!

Thanks!

 

[myatix]

As far as I can see the immersion should be connected to number 7 on the diagram above... As for the circulation pump... The above drawing suggests number 9 but I am a little uncertain about this as the circulation pump has it's own thermostat and was thinking they may conflict with one another???