Nordyne 664228R Manifold 30067439-890 Critical Safety Logic: Prevents lean

Critical Safety Logic: Prevents lean burn conditions by monitoring minimal gas pressure requirements before allowing the pilot or main burner to energize

check for zero ohms across the terminals to confirm the SPST switch has closed

Mounting at other angles may shift the activation point due to the weight of the internal components

including R-22 and R-134a

Nordyne 664228R Manifold 30067439-890 Critical Safety Logic: Prevents leanAs a technician, you know that maintaining proper gas manifold pressure and distribution is non negotiable for combustion stability. The Nordyne 664228R Manifold is a critical OEM component engineered specifically for gas fired furnace applications requiring precise fuel delivery to the burner cluster. This burner tube manifold is manufactured to strict tolerances to ensure a balanced flow across all ports, directly impacting the heating efficiency