30
Table 3 — ICVC Display Data (cont)
EXAMPLE 2 — MAINSTAT DISPLAY SCREEN
To access this display from the ICVC default screen:
1. Press .
2. Press ( will be highlighted).
3. Press .
NOTES:
1. Numbers in parenthesis below indicate the equivalent CCN
index for BEST programming or BACnet Translator use.
2. Off (0), Local (1), CCN (2), Reset (3)
3. Timeout (0), Ready (1), Recycle (2), Startup (3), Running (4),
Demand (5), Ramping (6), Autorest (7), Override (8), Tripout
(9), Control Test (10), Lockout (11), Pumpdown (12), Prestart
(13)
4. Normal (1), Alert (2), Alarm (3).
5. All variables with capital letter point names are available for
CCN read operation. Those shown with (†) support write opera-
tions for all CCN devices.
6. An abbreviation in the column to the right of POINT STATUS,
indicates that the point is being Forced and the Force level. The
CCN Force priority hierarchy is found ICVC OPERATION AND
MENUS. (This does not apply to the DEFAULT screen).
7. The Control Point (LCW_STPT) displayed is the leaving chilled
water control point when the machine is in leaving chilled water
control and the entering chilled water control point when the
machine is in entering chilled water control.
8. The Chilled Water Temp (CHW_TMP) displayed is the leaving
water temperature when the machine is in leaving chilled water
control and the entering chilled water temperature when the
machine is in entering chilled water control.
RUN STATUS DEFINITIONS
Timeout: The controls are delaying the start sequence until the Start
to Start or Stop to Start timers have elapsed.
Ready: The chiller is ready to begin the start sequence.
Recycle: The chiller has automatically shut down until the need for
cooling resumes.
Startup: The chiller has completed the prestart checks and has
energized the chilled water pump.
Running: The chiller has completed ramp loading following start up
Demand: The chiller is prevented from loading further because it
has reached the an AVERAGE LINE CURRENT Limit or a MOTOR
KILOWATTS Limit.
Ramping: The chiller has started and is slowly increasing its load to
control electrical demand charges.
Autorest: The chiller is starting back up due to a power failure and
auto-restart is enabled.
Override: The chiller is prevented from reaching full load by the con-
trols because the chiller is running close to an operational limit.
Tripout: The chiller has declared an alarm and has shut down.
Control Test: The operator has entered the Controls Test screen on
the ICVC.
Lockout: The compressor is prevented from starting so that chiller
may be safely pumped down to a vacuum.
Pumpdown: The refrigerant is being pumped out of the chiller, the
controls have energized the water pumps to prevent freeze-up.
Prestart: The chiller is in the process of the checks prior to energiz-
ing the compressor motor.
DESCRIPTION STATUS UNITS POINT
Control Mode NOTE 2 NOTE 2 MODE
Run Status NOTE 3 NOTE 3 STATUS
Start Inhibit Timer 0-15 min T_START
Occupied? 0/1 NO/YES OCC
System Alert/Alarm 1-3 NOTE 4 SYS_ALM
†Chiller Start/Stop 0/1 STOP/START CHIL_S_S
†Remote Start Contact 0/1 OPEN/CLOSE REMCON
Temperature Reset –30-30 DEG F T_RESET
†Control Point (See Note 7) 10-120 DEG F LCW_STPT
Chilled Water Temp (See Note 8) –40-245 DEG F CHW_TMP
†Active Demand Limit 40-100 % DEM_LIM
Average Line Current 0-999 % AMPS_%
Motor Percent Kilowatts 0-999 % KW_P
Auto Demand Limit Input 4-20 mA AUTODEM
Auto Chilled Water Reset 4-20 mA AUTORES
Remote Reset Sensor –40-245 DEG F R_RESET
Total Compressor Starts 0-99999 c_starts
Starts in 12 Hours 0-8 STARTS
Compressor Ontime 0-500000.0 HOURS c_hrs
†Service Ontime 0-32767 HOURS S_HRS
Ice Build Contact 0-1 OPEN/CLOSE ICE_CON
Refrigerant Leak Sensor 0-20 mA REF_LEAK
Emergency Stop 0/1 ENABLE/EMSTOP ENABLE
Alarm Relay 0/1 NORMAL/ALARM —
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