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Description
This gas ignition control box from Sit, model 537 ABC, is an electronic control unit for domestic gas installations. It supports both direct and intermittent pilot burner ignition and can be configured for non-volatile or volatile lockout. The 537 ABC series is designed specifically for SIT 840, 845 and 848 SIGMA multifunctional regulators; a special plastic container houses the valve body and simplifies the connection of solenoid valves.
Further details
Application Type
domestic gas installations with or without a fan
Parallel valve connection for high power
two valves connected in parallel for boilers over 60 kW
Plastic container
special plastic container that houses the valve body and simplifies the connection of solenoid valves
Choosing and fitting
Control boxes of this type are selected by the exact series designation, supply voltage, safety and pre-purge times, flame detection method, and the base or plug pattern. They are not interchangeable across series even within the same brand; a mismatched safety time is a safety issue. When replacing, confirm that the existing unit's series and type match exactly, and check the voltage, timing, and connector pattern.
