Weil Mclain Thermostat Wiring Diagram. How to connect thermostat c wire to weil mclain cga boiler. In attached picture blue pen drawing shows existing wirings.
Wiring connect field wiring as shown on next page. I am attempting to install the ecobee3 wireless thermostat. I have a weil mclain steam boiler.
Page 34 of weil mclain boiler gold cga cga25spdn user manual gas fired water not starting users 5 operating installation and problem with cgm 3 pi wont c wire for a smart thermostat cg series 12 owner s 7 two nest t stats wiring heating mcclain kick on no ignition 25 pdf egh 95 pfg 6 85 guide mbh.
Boiler weil mclain eco 70 manual. Need experts help with connecting c wire to supply power to nest e thermostat. Cga series 2 gas fired water boiler boiler manual a supply to the factory installed circulator wiring harness. Part number 550 110 6770299 r 550 225 0260199 ladder wiring diagram wiring water boilersvi schematic wiring diagram figure 5 part number 550 110 6770299 11.