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100 TRG-TRC016-EN
notes
period four
Chiller-Plant Control
Operator Interface
System-level communication and control is very important. Today, the amount
of communication between the components (chillers, cooling towers, pumps,
control valves, and so forth) has increased immensely, allowing many chilled-
water systems to be fully automated.
In some facilities, however, the largest energy user in the HVAC system (the
chiller plant) has not progressed beyond manual control. In some cases it was
reduced to manual control shortly after the building was commissioned.
Why does this occur? Chillers are large, with very expensive pieces of
equipment which, if damaged by incorrect operation, can cost the owner a
substantial amount of money to repair or replace. Operators are, therefore, very
sensitive to chiller plant operation. If the operator does not understand how the
system is designed and controlled, it is likely that the system will be put into a
manual control mode. Therefore, initial and ongoing operator training and
support is critical.
Operator Training and Support
Figure 108