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7.9 Manual Guide Vane Operation
It is possible to manually operate the guide vanes in order to check control operation or to control the guide vanes
in an emergency. Manual operation is possible by overriding the target guide vane position.
NOTE: Manual control overrides the configured pulldown rate during start-up and permits the guide vanes to open
at a faster rate. Motor current above the electrical demand setting, capacity overrides, and chilled water
temperature below the control point override the manual target and close the guide vanes. For descriptions of
capacity overrides and set points, please refer to separated PIC5+ Control User Manual.
7.10 Service and operation Log
A service and operation log (as shown in Fig. 52), is a convenient checklist for routine inspection and
maintenance and provides a continuous record of chiller performance. It is also an aid when scheduling routine
maintenance and diagnosing chiller problems. Keep a record of the chiller pressures, temperatures, and liquid
levels. Automatic recording of data is possible by using CCN devices such as the Data Collection module and a
Building Supervisor.
Contact a Carrier representative for more information.
SERVICE AND OPERATION LOG CARRIER 19DV SEMI-HERMETIC CENTRIFUGAL
REFRIGERATION MACHINE
Fig 52 – Service and operation log
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