Weil Mclain Transformer Relay Wiring Diagram. I can't find the combination with a breaker so i figured i'll buy the transformer and then pop it in in the 4 x 4 backplate since the relay is not used anyway. By admin december 6 2017.
Make sure you aren't overloading that transformer. Part #w510312167 | item #1707958 | manufacturer part #510312167 $ 105.00 each. I have a weil mclain steam boiler.
