28
DEFINING SET POINTS
The cooling set points are set via the Setpoint Table (
Main Menu
Setpoint Table
).
Cooling Setpoint 1, Cooling Setpoint 2,
and Cooling Ice Setpoint
are temperature set points that are
available as the
Current Setpoint
for unit operation. These set
points are limited by the type of fluid in the system (see Table 22).
See the Ice Storage Operation section on page 46 for more de-
tails about the Cooling Ice Setpoint.
All default set points are based on Leaving Water Control (En-
tering Fluid Control, EWTO [Entering Water Temperature Off-
set] set to No). Values must be confirmed for the individual set
points. Limits for the set points are listed in Table 22. These
values depend on the Evaporator Fluid Type and the Brine
Freeze Setpoint (see Chilled Water Fluid Type Selection on
page 30).
Table 22 — Evaporator Fluid Set Point Limits
* The minimum set point for brine applications is related to the brine
freeze set point. The set point is limited to be no less than the brine
freeze set point + 4°F (2.2°C).
CURRENT OPERATING SET POINT
Depending on the current operation type, the active set point can
be selected manually in the Main Menu, with the dry user con-
tacts or with network commands (CCN or BACnet), or automat-
ically with the set point time schedule (Occupancy Schedule 2).
Set points can be selected manually through the main interface
when the unit is in Local operating type, through contacts
when the unit is in Remote operating type, or through the
RS485 bus when unit is in CCN mode.
Set points can also be selected automatically through a set
point time schedule: when the period is occupied Cooling Set-
point 1 will be activated, and when the period is Unoccupied
Cooling Setpoint 2 will be active. When in local operating
type, time schedule is available if the Setpoint Select Variable
is set to AUTO (see below). In remote operating type, the
AUTO mode will be available unless the dual set point control
through contacts has already been selected. In CCN mode, the
set point selection always depends on the time schedule. The
set point can be forced through the
SP_OCC
CCN point (0 =
Occupied = Cooling Setpoint 1, 1 = Unoccupied = Cooling
Setpoint 2).
Set point selection offers three different control options (
Main
Menu
General Parameters
Setpoint Select
): Auto, Set-
point 1, and Setpoint 2.
• 0 = Auto: The active cooling set point will be determined
by the configured Occupancy Schedules. See the Defining
Occupancy Schedule section for details on setting the
schedules. Depending on the Ice Storage configuration and
ice contact state, the active set point may alternately be set
to the Cooling Ice Setpoint.
• 1 = Setpoint 1: The active cooling set point will be Cooling
Setpoint 1 defined in the set point table.
• 2 = Setpoint 2: The active cooling set point will be Cooling
Setpoint 2 defined in the set point table. Depending on the
Ice Storage configuration and ice contact state, the active
set point may alternately be set to the Cooling Ice Setpoint.
SETPOINT OCCUPANCY
Setpoint Occupancy is the default configuration for the Setpoint
Select variable. When Setpoint Select (
Main Menu
General
Parameters
Setpoint Select
) is configured to 0 (Auto), the
unit’s active set point is based on the programmed occupancy
schedules. Under Time Schedule 1 (OCCPC01S), the unit
controls to Cooling Set Point 1 (csp1) during the occupied peri-
ods. If the Time Schedule 2 (OCCPC02S) is in use, the unit’s ac-
tive set point is based on Cooling Set Point 1 (csp1) (
Main
Menu
Setpoint Table
Cooling Setpoint 1
) during the oc-
cupied period and Cooling Set Point 2 (csp2) (
Main Menu
Setpoint Table
Cooling Setpoint 2
) during the unoccupied
period. The two schedules are used together to determine periods
when the chiller will be controlling to Setpoint 1, Setpoint 2, or
Off. See Table 23 for details on how the active cooling set point
is determined based on unit operating type and parameter set-
tings.
DEFINING OCCUPANCY SCHEDULE
Two internal Time Schedules are available and must be field
programmed. Occupancy Schedule 1 (OCCPC01S) is used for
single set point On/Off control. Occupancy Schedule 2 (OC-
CPC02S) is used in combination with OCCPC01S for dual set
point On/Off and Occupied/Unoccupied set point control. To
access the Schedule screens, go to
Main Menu
Configura-
tion Menu
Schedule Menu
.
If the chiller is to be controlled to a single set point, use Sched-
ule 1 (OCCPC01S). This type of schedule will start and stop
the machine only. During the unoccupied times, the chiller will
be off. The unit start/stop schedule OCCPC01S has a default
setting of always occupied. If the chiller is to be controlled to 2
set points, occupied and unoccupied, also use Schedule 2 (OC-
CPC02S). Cooling Setpoint 1 will be active during occupied
periods, and Cooling Setpoint 2 will be active during unoccu-
pied periods.
To set the occupancy schedules, select OCCPC01S or OC-
CPC02S and select the applicable days for the displayed time
schedule period. The selected period will be displayed as a
green band on the timeline. Touch the Save button to confirm
or the Cancel button to cancel changes. See Fig. 29.
The schedules consist of 8 user-configurable occupied time pe-
riods. The control supports time schedules for local control, re-
mote control, and ice building. These time periods can be
flagged to be in effect or not in effect on each day of the week.
The day begins at 00:00 and ends at 24:00. The machine is in
unoccupied mode unless a scheduled time period is in effect. If
an occupied period is to extend past midnight, the occupied pe-
riod must end at 24:00 hours (midnight) and a new occupied
period must be programmed to begin at 00:00 hours.
In the example in Table 24, an early morning pulldown time
period is scheduled for Monday morning from 12:00 AM to
3:00 AM. The occupied period starts at 7:00 AM, Monday
through Saturday. The occupied time ends at 6:00 PM on Mon-
day and Tuesday, 9:30 PM on Wednesday, 5:00 PM on Thurs-
day and Friday, and 12:00 PM on Saturday.
NOTE: This example schedule was designed to illustrate the
programming of the schedule function and is not intended as a
recommended schedule for chiller operation.
Holiday Schedule
The unit control allows up to 16 holiday periods. Each holiday pe-
riod is defined by three parameters: the month, the start day, and
the duration of the holiday period. During the holiday periods, the
controller will be in occupied or unoccupied mode, depending on
the periods validated as holidays. The Holiday Configuration Ta-
ble is accessed by
Main Menu
Configuration Menu
Holi-
day Menu
. Select one of the 16 available Holiday periods
(HOLDY_01 through HOLDY_16) to define the holiday.
CCN Global Time Schedule
In addition to the two onboard occupancy schedules (OCCPC01S
and OCCPC02S), the Carrier Controller can also receive a time
schedule broadcast from another element in the CCN network.
The 30XV with Greenspeed
®
Intelligence chillers can be con-
figured to follow a CCN Global Time Schedule broadcast by
another system element. The Occupancy Table (OCCPC01S)
Set Point Limits
EVAPORATOR FLUID TYPE (flui_typ)
1 = Water
2 = Medium Brine
3 = Low Brine
Minimum*
38°F (3.3°C)
30°F (–1.1°C)
15°F (9.4°C)
Maximum
60°F (15.5°C)
60°F (15.5°C)
60°F (15.5°C)
Summary of Contents for AquaForce 30XV140
Page 79: ...79 Fig 76 VFD Communication Wiring Compressor A B Fan VFD A1 A2 B1 B2...
Page 228: ...228 Fig 90 30XV Typical Field Wiring Schematic cont...
Page 229: ...229 Fig 91 30XV Standard Tier 140 275 All Voltages Power Schematic NOTE See Legend on page 226...
Page 230: ...230 Fig 92 30XV Standard Tier 300 325 All Voltages Power Schematic NOTE See Legend on page 226...
Page 240: ...240 Fig 99 30XV Communication Wiring...
Page 241: ...241 Fig 100 30XV 115V Control Wiring All Tonnages All Voltages...
Page 242: ...242 Fig 101 30XV 24V Control Wiring 30XV140 325 All Voltages...
Page 243: ...243 Fig 101 30XV 24V Control Wiring 30XV140 325 All Voltages cont...
Page 244: ...244 Fig 102 30XV 24V Control Wiring 30XV350 500 All Voltages...
Page 245: ...245 Fig 102 30XV 24V Control Wiring 30XV350 500 All Voltages cont...
Page 246: ...246 Fig 103 Component Arrangement Diagram for 30XV140 325...
Page 247: ...247 Fig 103 Component Arrangement Diagram for 30XV140 325 cont...
Page 248: ...248 Fig 104 Component Arrangement Diagram for 30XV350 500...
Page 337: ...337 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig L System Information...
Page 338: ...338 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig M Unit and Language Settings...
Page 341: ...341 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig P Data Input 2...
Page 342: ...342 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig Q Data Input 3...
Page 347: ...347 APPENDIX J FACTORY SUPPLIED PUMPS cont Fig U Pump Wiring Diagram...
