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ELECTRICAL CONNECTION
The control unit is supplied with an external transformer that provides the very low voltage supply needed for
the operation of the electronics and the hydraulic valve assembly. On the primary side this transformer is
fitted with a power supply cable 180 cm without earth connection. A 230 Volt single phase (European
standard) electrical wall socket should be installed near to the unit.
Important: According to Directive 2006/95/EC, for safety reasons the transformer primary and secondary
power supply cables cannot be replaced. If they are damaged the complete transformer must be discarded
and replaced with a new one.
PROGRAMMING THE CONTROL UNIT
CONNECTIONS TO THE TERMINAL BLOCK
power supply port
filter wash indication
(dry contact)
external control
Terminal blocks J2, X4, J6 and J4 are not used.
2
J9 is a 2-wire 0.5 or 0.75 mm
output signal.
2
J17 is a 2-wire 0.5 or 0.75 mm
input signal taken into account after 30 continuous seconds.
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BWT PURITY PRO XL Technical Manual - code 125502287 - Rev 1 - 27/09/2021
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