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Connecting coal boiler and oil burner

WizWiz Member Posts: 1
Keystoker Ka 6 coal boiler in series to oil boiler. one thermostat is on Triple Aquastat on oil boiler for zone 1. The other thermostat is connect to a switch for zone 2 that runs it's own circulator. Keystoker Triple Aquastat is running circulator for loop. In doing this Ka is only running on the low side. Oil boiler is powered but low and high is set at 0. How can I wire thermostat to ka so it knows that there is a call for heat in one of the zones. In doing this Ka will run on high & low and will start stoking sooner. Will a R8222D 1014 relay work? If so diagram on wiring.
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