• Controls provide high temperature thermal cut-out and all gas ignition safety functions, controlling gas flow, ignition source, water temperature and a 120 Vac combustion air blower. • The control also monitors the appliance airflow proving switch and limit string to assure proper appliance operation. • The SmartValve Water Heater Control provides prepurge, postpurge and timed trial for ignition with multiple ignition trials and auto reset from lockout. • Diagnostic LED indicates system status. |