Hydrolevel 650 - Model 45-650 LWCO 120V w/ Test Button for Water Boilers, OEM-170CUsed on water boilers. 120VAC. Interrupts power immediately in a low water condition. Automatically restarts 650 120 VAC burner on return of water level. Test button checks burner circuit to ensure proper control operation without lowering the water level. Automatic Reset Burner Circuit Test Button LED Indicating Lights Power Consumption: 4 VA Switching Capacity: 5. 8 FLA, 34. 8 LRA Switch Contacts: SPDT Max Pressure: 160 PSI Voltage: 120VAC Model: 650