Specifications

17
Table 2 — Standard Instrumentation Sensors
ICVC Operation and Menus (Table 3 and
Fig. 15-21)
GENERAL — The ICVC display automatically reverts to the
default screen after 15 minutes if no softkey activity takes place
and if the chiller is not in the pumpdown mode (Fig. 15).
If a screen other than the default screen is displayed on the
ICVC, the name of that screen is in the upper right corner
(Fig. 16).
The ICVC may be set to display either English or SI units.
Use the ICVC configuration screen (accessed from the Service
menu) to change the units. See the Service Operation section,
page 61.
MODES
• LOCAL — In LOCAL mode the PIC II accepts com-
mands from the ICVC only and uses the local time occu-
pancy schedule to determine chiller start and stop times.
The PIC II can be placed in the local operating mode by
pressing the LOCAL softkey. When RUN STATUS is
READY, the chiller will attempt to start up.
• CCN — In CCN mode the PIC II accepts input from any
CCN interface or module (with the proper authority) as
well as from the local ICVC. The PIC II uses the CCN
time occupancy schedule to determine start and stop
times. The PIC II can be placed in the local operating
mode by pressing the CCN softkey. When RUN STATUS
is READY, the chiller will attempt to start up.
• OFF — The control is in OFF mode when neither the
LOCAL nor CCN softkey cue is highlighted. Pressing
the STOP key or an alarm will place the control in this
mode. The PIC II control must be in this mode for certain
operations, such as performing a Control Test or access-
ing ISM Configuration parameters.
Force priority
— The forces from various sources apply in an
order of priority. Any force can override a force with a lower
priority. The lowest priority belongs to the normal operating
control. A higher force cannot be overridden. For example, a
Service Tool force cannot be overridden by anything but a ma-
chine safety or fire alarm. See Table 4.
TYPE LOCATION MONITORED REMARKS
Temperature
Entering Chilled Water Cooler Inlet Nozzle
Leaving Chilled Water Cooler Outlet Nozzle
Entering Condenser Water Condenser Inlet Nozzle
Leaving Condenser Water Condenser Outlet Nozzle
Evaporator Saturation Sensor Well on Bottom of Evaporator
Compressor Discharge Compressor Volute
Oil Sump Compressor Oil Sump
Compressor Thrust Bearing Redundant Sensor Provided
Motor Winding Redundant Sensor Provided
Pressure
Evaporator Relief Valve Tee
Condenser Relief Valve Tee
Oil Sump Compressor Oil Sump
Oil Pump Discharge Oil Pump Discharge Line
Diffuser (Compressor Internal) Only in Machines Equipped with Split Ring Diffusers
Entering Chilled Water (Optional) Cooler Inlet Nozzle
Leaving Chilled Water(Optional) Cooler Outlet Nozzle
Entering Condenser Water Condenser Inlet Nozzle
Leaving Condenser Water Condenser Outlet Nozzle
Angular Position
Guide Vane Actuator Potentiometer Inside of Actuator
Split Ring Diffuser Actuator (only on split ring dif-
fuser equipped machines)
Potentiometer Inside of the Actuator (Split Ring Diffuser Position is
not Displayed on the ICVC)
Pressure Switch High Condenser (Discharge) Pressure Wired into the Starter Control Circuit
Temperature Switch Oil Pump Motor Winding Temperature Wired into the Oil Pump Control Circuit
SHRINK WRAP
STRAIN RELIEF
1/8” NPT
THERMOWELL
REMOVABLE
TEMPERATURE
SENSOR
Fig. 14 — Temperature Sensor Used
with Thermal Well
a23-1624
RUNNING TEMP CONTROL
LEAVING CHILLED WATER
01-01-95 11:48
28.8 HOURS
CHW IN CHW OUT EVAP REF
CDW IN CDW OUT COND REF
OIL PRESS OIL TEMP AMPS %
CCN LOCAL RESET MENU
55.1 44.1 40.7
85.0 95.0 98.1
21.8 132.9 93
PRIMARY STATUS
MESSAGE
COMPRESSOR
ON TIME
DATE TIME
SOFT KEYS
MENU
LINE
EACH KEY'S FUNCTION IS
DEFINED BY THE MENU DESCRIPTION
ON MENU LINE ABOVE
ALARM LIGHT
(ILLUMINATED
WHEN POWER ON)
STOP BUTTON
•
HOLD FOR ONE
SECOND TO STOP
•
•
BLINKS CONTINUOUSLY
ON FOR AN ALARM
BLINKS ONCE TO
CONFIRM A STOP
SECONDARY
STATUS
MESSAGE
Fig. 15 — ICVC Default Screen