Honeywell AUTOMATIC CONTROL User Manual

PNEUMATIC CONTROL FUNDAMENTALS
91
ENGINEERING MANUAL OF AUTOMATIC CONTROL
Any time the Supply Fan 1M runs, the Return Fan 2M runs.
Any time the Return Fan 2M runs, the Exhaust Fan 3M
and the ventilation controls are energized by the After-Hours
Fig. 75. Start-Stop Control.
3M
EXHAUST
FAN
480V
X1-3X2-3
2M
EXHAUST
FAN
480V
X1-2X2-2
1M
EXHAUST
FAN
480V
X1-1X2-1
TN
1TC
1CR
NIGHT
'STAT
2EP
1EP
1M
1M
OL
SMOKE
DETECTOR
SUPPLY RETURN
LOW
TEMPERATURE
THERMOSTAT
HIGH STATIC
PRESSURE
CUTOUT
X1-1 X2-1
1M
2M
2M
OL
X1-2 X2-2
A
H
A
H
2CR
2CR
2M
1CR
2TC
3M
3M
OL
X1-3 X2-3
A
H
H
FIRE
EXHAUST
1
CR
2
TC
1
TC
TIME CLOCKS
INTERVAL TIMER
(AFTER HOURS)
N
120 VOLT CONTROL CIRCUIT
M10303
2
CR
EARLY START CLOCK
OCCUPANCY CLOCK
Interval Timer or by the Occupancy Schedule Time Clock
2TC set for 0750.
Both Clocks 1TC and 2TC are set to shut the system down
at 1700.

Honeywell AUTOMATIC CONTROL Specifications

General

Brand	Honeywell
Model	AUTOMATIC CONTROL
Category	Controller
Language	English