On the surface it appears that it will work. Here is a picture of the box for that zone. I see power coming in (top), existing two wires from the thermostat (top brown) and wires going to pump (bottom). Is this considered a dry contact switch? It's not clear how I would hook up such a device to this though.
That's a switching relay, and it does not expose the
C terminal (see the PDF).
You may be able to access the
C terminal, but you'd have to disassemble the device. Which almost certainly voids the warranty, and could lead to unrepairable damage.