Operating instructions
46
CCN LOADSHED CONTROLLED DEMAND LIMIT —
To configure Demand Limit for CCN Loadshed control, the
unit Operating Type Control must be in CCN control. With the
Touch Pilot™ display, the machine must be started with CCN
Control. For the Navigator™ display, the Operating Control
Type (I/O Button, OPER) must be CCN CONTROL.
The unit must be controlled by a Chillervisor module. The
Chillervisor module can force the demand limit variable and
directly control the capacity of the machine. Additionally, the
unit’s set point will be artificially lowered to force the chiller to
load to the demand limit value.
Ice Storage Operation — Chiller operation can be
configured to make and store ice. The Energy Management
Module and an Ice Done Switch are required for operation in
the Ice Mode. In this configuration, the machine can operate
with up to three cooling set points: Cooling Set Point 1 (Cool-
ing Setpoint 1, CSP.1) is used during the Occupied period;
Cooling Set Point 2 (Cooling Setpoint 2, CSP.2) is used dur-
ing the Unoccupied period when the ice build is complete (Ice
Done Switch is closed); and Cooling Ice Set Point (Cooling
Ice Setpoint, CSP.3) is used during the unoccupied period
while ice is building (Ice Done Switch is open).
To configure this option with the Touch Pilot display:
To configure this option with the Navigator display:
Broadcast Configuration — The 30XA chiller is ca-
pable of broadcasting outside-air temperature (OAT), time,
date, and holiday status to all elements in the CCN system. In
the stand-alone mode, broadcast must be activated to utilize
holiday schedules and adjust for daylight saving time. If the
chiller is to be connected to a CCN system, determine which
system element is to be the network broadcaster and activate
broadcast in all other system elements. Broadcast is activated
and deactivated in the BRODEFS Table. It is accessible from
Touch Pilot display (Config
BRODEFS) or through Net-
work Service Tool. It is not accessible through Navigator
display.
Only one element should be configured as a broadcaster. If
a broadcast is activated by a device that has been designated as
a network broadcaster, then broadcasted time, date, and holiday
status will be updated over the CCN system. If broadcast is en-
abled, a broadcast acknowledger must also be enabled. The ac-
knowledger cannot be the same machine as the broadcasting
machine.
ACTIVATE — The Activate variable enables the broadcast
function of the ComfortLink™ controls. If this variable is set to
0, this function is not used and holiday schedules and daylight
savings compensation are not possible. Setting this variable to
1 allows the machine to broadcast and receive broadcasts on
the network. The following information is broadcast: the time
with compensation for daylight savings, date, holiday flag, and
the outdoor-air temperature.
Set this variable to 2 for stand-alone units that are not con-
nected to a CCN. With this configuration, daylight saving time
and holiday determination will be done without broadcasting
through the bus. This variable can only be changed when using
the Touch Pilot display, ComfortVIEW™ software, or Net-
work Service Tool. This variable cannot be changed with the
Navigator display.
To configure this option with the Touch Pilot display:
OAT BROADCAST — To enable the outside air temperature
(OAT) broadcast, the unit broadcasting the temperature must
be configured with its own CCN Bus and CCN Address. Leav-
ing the parameters at the factory default of 0 for the CCN Bus
and CCN Address disables the OAT Broadcast function. Once
configured, the first broadcast of OAT will be within 5 minutes.
This variable can only be changed when using the Touch Pilot
display, ComfortVIEW software, or Network Service Tool.
This variable cannot be changed with the Navigator display.
To configure this option with the Touch Pilot display:
BROADCAST ACKNOWLEDGER — This configuration
defines if the chiller will be used to acknowledge broadcast
messages on the CCN bus. One broadcast acknowledger is re-
quired per bus, including secondary buses created by the use of
a bridge. This variable can only be changed with the Touch Pi-
lot display, ComfortVIEW software, or Network Service Tool.
This variable cannot be changed with the Navigator display.
To configure this option with the Touch Pilot display:
Alarm Control
ALARM ROUTING CONTROL — Alarms recorded on the
chiller can be routed through the CCN. To configure this op-
tion, the ComfortLink controls must be configured to deter-
mine which CCN elements will receive and process alarms. In-
put for the decision consists of eight digits, each of which can
be set to either 0 or 1. Setting a digit to 1 specifies that alarms
will be sent to the system element that corresponds to that digit.
Setting all digits to 0 disables alarm processing. The factory de-
fault is 00000000. See Fig. 30. The default setting is is based
on the assumption that the unit will not be connected to a net-
work. If the network does not contain a ComfortVIEW, Com-
fortWORKS
®
, TeLink, DataLINK™, or BACLink module,
enabling this feature will only add unnecessary activity to the
CCN Communication Bus.
This option can be modified by the Touch Pilot display. It
cannot be modified with the Navigator display.
Typical configuration of the Alarm Routing variable is
11010000. This Alarm Routing status will transmit alarms to
ComfortView software, TeLink, BACLink, and DataLINK.
To configure this option with the Touch Pilot display:
DISPLAY NAME PATH
LINE
NO.
VALUE
Ice Mode Enable Config
USER 42 Yes
ITEM ITEM EXPANSION PATH VALUE
ICE.M Ice Mode Enable Configuration
OPTN ENBL
DISPLAY NAME PATH
LINE
NO.
VALUE
Activate Config
BRODEFS 1
Range = 0 to 2
Default = 2
DISPLAY NAME PATH
LINE
NO.
VALUE
Activate Config
BRODEFS 1
Range = 0 to 2
Default = 2
OAT Broadcast ConfigBRODEFS 3
Bus # ConfigBRODEFS 4
Range = 0 to 239
Default = 0
Element # Config
BRODEFS 5
Range = 0 to 239
Default = 0
DISPLAY NAME PATH
LINE
NO.
VALUE
Broadcast acknowledger Config
Ctlt-ID 10 Yes
DISPLAY NAME PATH
LINE
NO.
VALUE
Alarm Routing
Control
Config
ALARMDEF 1 Default = 00000000