Application
The BCU 465 combines the func-
tionally related components of the
automatic burner control unit, igni-
tion transformer, manual/automatic
mode and a digital display for op-
erating parameter and fault status
indication in a single metal housing.
The BCU
®
controls the ignition
process and continuously monitors
the burner operation. The BCU
®
is designed to mount close to the
burner to reduce installation costs
and simplify commissioning and
troubleshooting efforts.
Application example
BCU 465 for Modulating Con-
trol Systems
The figure shows a typical modulat
-
ing control system. The burner is
ignited when the air butterfly valve
is in the ignition position (low-fire).
Once the burner is ignited, the air
butterfly valve can be modulated
throughout the control range. The
gas is controlled with an air/fuel
ratio regulator cross-connected to
the burner air supply piping.
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