Honeywell AUTOMATIC CONTROL SI Edition User Manual

ENGINEERING MANUAL OF AUTOMATIC CONTROL
AIR HANDLING SYSTEM CONTROL APPLICATIONS
209
VENTILATION CONTROL PROCESSES
The following applications show various ways of controlling ventilation in an air conditioning system.
FAN SYSTEM START-STOP CONTROL
FUNCTIONAL DESCRIPTION
Item
No. Function
1 Supply fan starts and enables return fan start
and system controls.
2 SA smoke detector stops supply fan when
smoke detected.
3 RA smoke detector stops supply fan when
smoke detected.
4 Controller stops fan when low temperature
detected.
5 SA high static pressure control stops fan when
unsafe pressure exists.
6 Automatic fan system control subject to
commandable ON-OFF-AUTO software point.
7 Control program turns supply, return, and
exhaust fan on and off dependent upon
optimized time schedule, unoccupied space
temperatures, and occupant override requests.
8 Occupant override switch provides after hours
operation when pressed.
9 Duration of operation for override request.
10 Space temperature (perimeter zone) inputs to
optimum start-stop, unoccupied purge, and
low limit programs.
11 Setpoint at which unoccupied low-limit
program executes.
12 OA temperature input to optimum start-stop
program.
13 Return fan operation enables exhaust fan
control program.
14 Exhaust fan status (operator information).
15 Warm-up mode status (operator information).
16 Supply fan load (VAV type systems-operator
information).
17 Return fan load (VAV type systems-operator
information).
63
17
OFF
OFF
OFF
63
OA SA
RA
RA
EA
ON
ON
ON
60
16
AUTO
PERCENT
LOAD
PERCENT
LOAD
OA
TEMPERATURE
23.5
STATUS
DURATION
MINUTES
UNOCCUPIED OVERRIDE
WARM-UP MODE
STATUS
UNOCCUPIED
LOW LIMIT
SETPOINT STATUS
PROPELLER
EXHAUST
FAN
SPACE
TEMPERATURE
FAN SYSTEM
SCHEDULE AND
CONTROL PROGRAM
M15151
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
NORMAL

Honeywell AUTOMATIC CONTROL SI Edition Specifications

General

Brand	Honeywell
Model	AUTOMATIC CONTROL SI Edition
Category	Control Systems
Language	English