Abbey’s FL4503, also known as the Fx4xxx, replaces the FL4502. It is an electronic ignition controller designed for gas burning appliances such as pool heaters, fires, boilers, kilns, etc. It is functionally compatible with the Robertshaw SP845 and can replace it with or without a conversion kit.
Being a programmable unit means it can easily be factory reprogrammed to the OEM’s requirement or to make the function compatible with an obsolete controller. It is a programmed version of the Fx4 programmable electronic ignition full sequence controller.