Single Centrifugal Chiller Control Application - Honeywell AUTOMATIC CONTROL SI Edition Engineering Manual

SINGLE CENTRIFUGAL CHILLER CONTROL APPLICATION

FUNCTIONAL DESCRIPTION
TOWER
CONTROL
16
23
4
ON
14
ENABLED
BY REMOTE
CONTROLS
1
Item No. Function
1 Indicates when chiller system is required by
fan system.
2 Chilled water pump ON-OFF-AUTO
function. In AUTO pump runs when fan
systems need chilled water.
3 Chiller ON-OFF-AUTO function (In ON and
AUTO chilled water flow required for chiller
to run).
ENGINEERING MANUAL OF AUTOMATIC CONTROL
CHILLER, BOILER, AND DISTRIBUTION SYSTEM CONTROL APPLICATIONS
CHILLED WATER SETPOINT
6.5
6
MINIMUM CURRENT
13
6
CHILLER 1
26
AUTO ON
OPERATING STATUS
MODE
3 10
Fig. 9. Single Chiller Control Graphic.
9.5
MAXIMUM
7
5
100 NORMAL
78
PERCENT LOAD ALARM
STATUS
MAX CURRENT
11
8
15
CONTROL
PROGRAM
4 Condenser pump status. Pump started by
chiller controls when chilled water needed.
5,6 Chiller leaving water temperature and setpoint.
7 Icon to select chiller control dynamic
sequence display (Fig. 10).
8 BMCS commandable load limiting function.
9-14 Operator information.
15 Control program coordinates chiller control.
16 Icon to select cooling tower control displays.
303
CHILLER
SYSTEM
CONTROL
7
2
AUTO
10.5
9
12
M15253