Honeywell Pneumatic Controls - Page 162

Pneumatic Control System Example
154 customer.honeywell.com 70-6925
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