Preferred Instruments 5004-890 Flame Safeguard Controller for Single Burner RA890 Replacement tier_A_0_30 500 lb Depth 1

500 lb Depth 1

5 mm Length 114

Information About 400AST

24 in Height 14

Includes Advantys V11

Preferred Instruments 5004-890 Flame Safeguard Controller for Single Burner RA890 Replacement tier_A_0_30 500 lb Depth 1Description The Preferred Instruments 5004 890 flame safeguard controller is a microcomputer based burner control designed for single burner combustion systems. It manages purge, ignition, pilot trial, and main flame sequences while monitoring flame presence and operating interlocks for safe shutdown under fault conditions. The controller is commonly used as a direct replacement for many Honeywell RA890 series controls in retrofit burner applications.