Originally Posted by
hvac1000
It would not be a problem at all if you use a relay between the stat and the pump.
If you mean for a low voltage thermostat, the problem would be sourcing the relay and 24V power supply, mounting them somewhere, and then running low voltage wiring back to where the thermostat is currently mounted, but maybe I'm making it harder than it has to be. Would this be the type of thing Lowe's or Home Depot would have sitting on the shelf?
Originally Posted by
NewHmOwner
...was considering installing the HWP 120 by King Electrical...
Those look like what I'm looking for.
Originally Posted by
NewHmOwner
What is a relay?
A
relay is an electromechanical (or solid state) switch that allows a small current flow to control a larger current flow. In an HVAC application, a low voltage thermostat (24 V?) would control power to the electromagnetic coil of a relay which when energized would close a set of contacts that complete a circuit to power a larger load, such as a 120V or 240V motor. The advantage of this type of control is large power wiring does not have to be run to the thermostat's physical location. It may also simplify and reduce the cost of the thermostat as the electrical components that comprise the thermostat do not have to be sized to handle the current draw of the large load.