Honeywell L8148E1265 Immersion-Type Controller High limit opens burner circuit only Include transformer and accessory terminals for adding a remote low limit controller Case available for horizontal or vertical mounting Requires a 24 Vac thermostat with heat anticipator set at 0.2A 180 F to 240 F Maximum Safe Operating Pressure - Immersion Well: 255 pound per square inch ; Maximum Safe Operating Pressure - Immersion Well: 1757 kilopascal