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CTV-SVU01G-EN
Table 5. Chiller top-level operating modes and corresponding submodes for Simplex chillers (continued)
Top-level mode Description Corresponding submodes
Running—Limit Compressor is running with limits in effect.
Current Limit
Phase Unbalance Limit
Condenser Pressure Limit
Evaporator Temperature Limit
Evaporator Rfgt Temperature Higher Than
Selection
Minimum Capacity Limit
Maximum Capacity Limit
Free Cooling Unit is in Free Cooling mode and will not run the compressor.
Opening Free Cooling Valves
Closing Free Cooling Limit
Preparing to Shutdown Unit is closing inlet guide vanes prior to compressor shutdown. Closing IGV (IGV Position %)
(b)
Shutting Down
Compressor has been stopped and unit is performing shutdown
tasks.
Post-Lubrication Time (MIN:SEC)
(a)
Evaporator Pump Off Delay (MIN:SEC
(a)
Condenser Pump Off Delay (MIN:SEC)
(a)
Satisfied Need to Minimum Capacity Timer (will
appear for only 10 seconds)
(a)
“MIN:SEC” refers to a count-down timer that appears on the screen to indicate how long the submode will remain active.
(b)
“IGV Position %” refers to a value that indicates the position of the inlet guide vane (IGV).
Duplex Chillers
The following figure shows an example of a Duplex Chiller Operating Modes screen.
Figure 13. Chiller Operating Modes screen for Duplex chillers
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