Honeywell On-Off Primary Control

ON-OFF PRIMARY CONTROL, 120VAC, INTERMITTENT PILOT, INTERMITTENT MAIN FLAME ESTABLISHING PERIOD, 4 SECOND OR 10 SECOND PILOT FLAME ESTABLISHING PERIOD, FIVE LEDS PROVIDE SEQUENCE INFORMATION, NONVOLATILE MEMORY, FUNCTIONS INCLUDE AUTOMATIC BURNER SEQUENCING

Overview

The Honeywell RM7890A, B, C/EC7890A, B Relay Modules are microprocessor-based integrated burner controls for
semi-automatically fired gas, oil, or combination fuel single burner applications. The RM/EC7890 Relay Module is
intended to replace the RA890F, G, H Protectorelay® PrimaryControl. The RM/EC7890 System consists of a relay module,
subbase, and amplifier. Options include Personal ComputerInterface, keyboard display module (KDM), Data ControlBus
Module™, remote display mounting, first-out expandedannunciator, and Combustion System Manager¨ Software