The HH19ZA170 limit switch serves as a mandatory safeguard

Technicians should verify the line voltage with a multimeter

0 Cv valve body provides the high flow capacity required for demanding commercial and residential zoning

Durable Teflon Diaphragm: High-performance material specifically selected to withstand the rigors of steam service and high-temperature water

Fenwal 35-705701-001 Control 319852-301 The HH19ZA170 limit switch servesThe Fenwal 35 705701 001 is a 120V Direct Spark Ignition (DSI) control engineered for high demand gas burner applications. Featuring a microprocessor based design, this unit delivers precise 4 second Trial for Ignition (TFI) sequences and consistent purge timing to ensure safe combustion. As a potted ignition control, it is specifically built to handle washdown environments and extreme mechanical vibration, making it a standard choice for construction