Installation and Maintenance Manual

Controls Interface
RLC-SVX09H-EN 135
Waiting to Start
The chiller is not currently running and there is a call for cooling but the lead
circuit start is delayed by certain interlocks or proofs.
Waiting to Start Sub-modes
Waiting For Condenser Water Flow
The chiller will wait up to 4 minutes in this mode for condenser water flow to be
established per the flow switch hardwired input.
Cond Water Pump PreRun Time min:sec
The chiller will wait up to 30 minutes (user adjustable) in this mode for to allow
the condenser water loop to equalize in temperature
Cond Pmp Strt Dly (Head Pres Ctrl) min:sec
Only possible when Condenser Head Pressure Control option is enabled, this wait
may be necessary due to the Head Pressure control device's stroke time.
Cprsr Strt Delay (Head Pres Ctrl) min:sec
Only possible when Condenser Head Pressure Control option is enabled, this wait
may be necessary due to the Head Pressure control device's stroke time
Running At least one circuit on the chiller is currently running.
Running Sub-modes
Maximum Capacity The chiller is operating at its maximum capacity.
Capacity Control Softloading
The control is limiting the chiller loading due to capacity based softloading
setpoints.
Current Control Softloading
The chiller is running, and loading of individual compressors may be limited by
a gradual filter of the chiller’s softloading current limit setpoint. The starting
current limit and the settling time of this filter is user adjustable as part of the
current control softload feature. The mode will be displayed as long as the
Current Control Softloading limit is ramping or “settling”.
Running - Limit
At least one circuit on the chiller is currently running, but the operation of any
of the circuits on the chiller are being actively limited by the controls chiller level
limit. Other sub modes that apply to the Chiller Running top level modes may also
be displayed here. Refer to the list of circuit limit modes for circuit limits that will
cause display of this Chiller Level Running Limit mode.
Shutting Down
The chiller is still running but shutdown is imminent. The chiller is going through
a compressor run-unload of the lag circuit/compressor.
Shutting Down Sub-modes
Evaporator Water Pump Off Delay: min:sec
The Evaporator water pump is continuing to run past the shutdown of the
compressors, executing the pump off delay timer.
Cond Water Pump Off Delay: min:sec
The Condenser water pump is continuing to run past the shutdown of the
compressors, executing the pump off delay timer.
Misc. These sub modes may be displayed in most of the top level chiller modes
Misc. Sub-modes
Manual Evap Water Pump Override The Evaporator water pump relay is on due to a manual command.
Diagnostic Evap Water Pump Override The Evaporator water pump relay is on due to a diagnostic.
Diagnostic Cond Water Pump Override The Condenser water pump relay is on due to a diagnostic.
Local Schedule Active
The local time of day scheduler (option) is operational and could automatically
change modes or setpoints as scheduled. Must be enabled in Configuration menu
to be functional.
Manual Condenser Water Pump Override The condenser water pump relay is on due to a manual command.
Manual Compressor Control Signal Chiller capacity control is being controlled by DynaView or TechView.
Hot Water Control
These modes are mutually exclusive and they indicate that the chiller is
controlling to the active hot water setpoint, the active chilled water setpoint, or
the active ice termination setpoint respectively.
Chilled Water Control
Ice Building
Table 107. Chiller mode (continued)
Chiller Modes Description
Top Level Mode Further information is provided by the submode
Sub-modes