Lennox 12U98 Relay 321142-301 This specific 70-21476-02 model is

This specific 70-21476-02 model is designed for clockwise (CW) rotation

Which boiler series is this burner compatible with

ensuring sensing accuracy over time

ensure the spring color code matches the intended PSI set point to maintain calibration accuracy and diaphragm safety

Professional installation is required to verify manifold pressure and ensure proper flame impingement against the internal baffles

Lennox 12U98 Relay 321142-301 This specific 70-21476-02 model isThe Lennox 12U98 Relay is a professional grade 24Vac electronic time delay relay engineered specifically for critical timing sequences in residential and commercial HVACR systems. This genuine OEM replacement part (also identified as 103047 02) provides an essential 30 minute delay on break (DOB) function. This fixed interval ensures that the system components continue to operate for a set period after the control signal is removed, which is vital for