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WM Aquaplus and cold start?
I installed an aqua plus indirect hot water heater last week to replace an amtrol and the wiring diagram for the aquaplus heater said to install a r845 relay and connect 5 and 6 to the aquastat, which I did. Now the boiler only goes on when the hwh calls. Is this cold start? The boiler is a 25 year old WM 868 steam boiler.
Before this , the boiler was wired straight from the aquastat to the relay and used to come on when the aquastat in the boiler said to and maintained a temperature of 170 degrees.
Which wiring do you guys recommend? Maintain boiler water temperature all the time or only come on when the r845 and indirect calls?