When troubleshooting cycles

this 4-blade fan is calibrated to provide optimal static pressure and high-volume airflow for unit industrial heating applications

While it fits standard 1/8" OD tubing

this Class 2 transformer is ideal for driving multiple relays

McDonnell & Miller RB-24E-A Wiring Harness Els PW 17895 When troubleshooting cyclesThe McDonnell & Miller RB 24E A (Part Number 144694) is a heavy duty 24Vac low water cut off designed specifically for residential hot water boilers. Featuring a 3 4" NPT connection with brass threads for a high integrity metal to metal seat, this conductance type LWCO ensures dependable dry fire protection. The integrated vent damper wiring harness simplifies the circuit, allowing for a clean "plug and play" interface with most modern gas fired