Honeywell ST7800A1054 Programmer Module RM7800 Burner Control 60s Purge NEW
Part Number: ST7800A1054. RM7800, RM7840, RM7838, RM7890, RM7895, RM7896, RM7897, RM7898. This module ensures the combustion chamber is properly ventilated (pre-purged) for exactly 60 seconds before the ignition sequence is allowed to begin.