please help wiring R89 relays to new boiler

John B_2

System has three RA89A relays and the guy wired all three relays with a common red and white lead and then wired that to the T and TV on the boiler.

Now the boiler circ pump constantly runs and so do the zone pumps which are connected to the relays.

the boiler aquastat control is a L8148e

Charlie from wmass

The answer is basic

not wired properly. Go to the wiring diagrams and start fresh.

Tim McElwain

The RA89 relays

are a circulator only relay they do not have an isolated set of switches to be wired to T and TV. You might want to get a Taco 503 which would work great for your situation. It will run the circulators and wire to your aquastat relay for burner and boiler circulator operation.

John B_2

Tim, thanks but I,ve just bought the Tekmar 401

House control. Thanks for your post.