consult the valve body specifications for EPDM or Viton requirements

the 1171000 is a circuit board with TDR

The 1k ohm platinum sensor models are identified by white leads with a blue stripe to prevent wiring errors during installation

While commonly cited for Ultra 310 and Ultra 80 Series 1-2 models

Carrier 50HJ500451 Flame Retainer 319847-401 consult the valve body specificationsThe Carrier 50HJ500451 Flame Retainer is a critical combustion component designed for high efficiency gas fired rooftop units and packaged systems. Engineered to withstand the thermal stresses of continuous burner assembly operation, this part ensures precise flame stabilization and prevents flame lift off or flashback during the ignition cycle. As a direct OEM replacement part, it maintains the specific venturi airflow dynamics required for complete