Carrier AquaEdge 23XRV - Control Operation; Start-Stop Control

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Fig. 27 — Compressor Status
Fig. 28 — Motor Status
Fig. 29 — VFD Status
Fig. 30 — Economizer Status
Fig. 31 — Economizer Status (TP Only)
CONTROL OPERATION
Start-Stop Control
This function controls the chiller START-STOP command. The
selectable control modes are Local or AutoStart. See Unit Start/
Stop Screen (Basic log-in). Specific control sources are valid to
start or stop the chiller for each control mode.
Fig. 32 — Chiller Stop/Start Screen
LOCAL
When the control mode is LOCAL, the chiller can be started by
the “Local ON” button on the PIC6 interface screen, and can be
shut down by the Disable / Stop Unit button under the Chiller Start
/ Stop Menu. Unit can be shut down with the red stop sign icon on
the local Start / Stop Menu during emergency stop conditions.
Stopping the unit with the red stop icon (EMSTOP) will result in
an Emergency Stop alarm and will hard stop the unit.
AUTOSTART
For autostart the feature must first be configured under "Config-
ure Startup Options"; see Fig. 13.
REMOTE CONTACTS
When start is desired from closing of a set of contacts, the "Enable
Remote Contacts Start" must be checked in the Configure Startup
Options. This will allow startup with a dry contact input to
REM_CON (7TB-9,10) in the control panel. The chiller can be
shut down by the remote discrete input, the Stop button on the
PIC6 interface screen, or the EMSTOP software point.
NETWORK
When the control mode is NETWORK, the chiller can be started
and stopped by the CHIL_S_S and CHIL_OCC software points,
which are written by other equipment through network commands
and Dual Stpt schedule (both must be TRUE for chiller to start).
For quick shutdown of the chiller, use the EMSTOP software
point or stop using the HMI. Network Start can be configured for