21971474 Brahma AR1 18211000

Brahma AR1 18211000
In case of mains supply systems with unearthed neutral, for a
correct flame detection the controllers provided with a built-in
ignition transformer (SR3/TR… AT5/TR…etc. and their byproducts) require an electrical connection between the burner
mass and terminal 2 (neutral) of the controller. This connection
can be carried out by an RC circuit, a pre-wired unit named
RC1. Both of its conductors are to be connected to the earth
terminal ( ), a yellow-green wire, and terminal 2, a black wire
respectively.

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