The user guide show that the voltage and load current levels supported by the Uni directly are far lower than your pump is likely pulling. I would try to find a 24V input relay that is rated appropriately to switch your pumps and use the Uni to switch that relay.
The driver that just added the temperature sensor support which @Sebastien alluded to is the one that I wrote. It's linked in the thread that he shared.
Note that I only supported one temperature sensor because that was the test case the other user could support. But I'd be willing to add support for multiple sensors if someone can test it.
Just post in that other thread of you want to give my driver a try and you have any questions.
