Honeywell AUTOMATIC CONTROL User Manual

ENGINEERING MANUAL OF AUTOMATIC CONTROL
CHILLER, BOILER, AND DISTRIBUTION SYSTEM CONTROL APPLICATIONS
309
DUAL CENTRIFUGAL CHILLERS CONTROL APPLICATION
FUNCTIONAL DESCRIPTION
Fig. 14. Dual Centrifugal Chiller Control Graphic.
Item No. Function
1Indicates when chilled water is required by
fan system.
2 Chilled water pump ON-OFF-AUTO
function. In AUTO pump runs when system
needs chilled water.
3 Chiller ON-OFF-AUTO function (In ON and
AUTO chilled water flow required for chiller
to run).
4 Condenser pumps status. Pumps started by
chiller controls when chiller needed.
78
91
46
ON 78
OFF 00
85
BY REMOTE
CONTROLS
OPERATING
MODE
STATUS ALARM
STATUS
CHILLER
CONTROL
SETPOINTS
SEQUENCES
1 = CHILLER 1 LEADS
2 = CHILLER 2 LEADS
3 = ALTERNATES
CONTROL
PROGRAM
FLOW &
PRESSURE
CONTROL
TOWER
CONTROL
MORNING LEAD
CHILLER SELECTOR
CHILLER 1
CHILLER 2
MINIMUM
CURRENT
MAXIMUM
CHILLED WATER SETPOINT
M10497
CURRENT
PERCENT LOAD
MAX
1
42
50
AUTO
AUTO
AUTO
100
100
AUTO
ON
ENABLED
DISABLED
NORMAL
NORMAL
55.0
42.1
12
19
4
9
13
1
3
15
8
11
17
4
14
5
2
11
2
10
5
7
20
18
6
42
55
OFF
5,6 Chiller leaving water temperature and setpoint.
7Icon to select chilled water setpoint reset
dynamic sequence display (Fig. 15).
8 BMCS commandable load limiting functions.
9 Lead chiller selector function.
10-17 Operator information.
18 Control program coordinates chiller staging
and control.
19 Icon to select cooling tower control displays.
20 Icon to select chilled water flow and pressure
control displays.

Honeywell AUTOMATIC CONTROL Specifications

General

Brand	Honeywell
Model	AUTOMATIC CONTROL
Category	Controller
Language	English