SPX MARLEY LLC, User Manual

Page: 8 / 48

8
Internal Components of the LLC Control Panel
LLC control panels are built to UL and CUL standards and are designed to
provide the numerous configurations needed for cooling tower applications.
All LLC control panels include a main circuit breaker with an additional circuit
breaker and a HAND-OFF-AUTO switch provided when the system includes
a water makeup circuit. The additional circuit breaker provides an exclusive
control circuit for a 120VAC water solenoid valve. High and low circuit relay
cards and the appropriate terminal connections comprise the rest of the
components necessary for the specific configuration. The raised terminal strip
provides easier access to make the necessary connections of the water probe
assembly and customer interface.
Inside view of an LLC Control Panel with Makeup,
High Alarm, and Low Alarm .
operation