
. Plug damper harness receptacle into damper harness plug. Bypassing (jumpering) vent damper will cause flue products such as carbon monoxide to escape into the house. This will cause severe personal injury or death. After boiler has operated once, if either end of the harness is disconnected, the system safety shutdown will occur. The boiler will not operate until harness is reconnected. Effikal damper — Damper hold open switch must be in“Automatic Operation” position for system to operate prop