Honeywell Pneumatic Controls Engineering Manual page 162

Pneumatic Control System Example
X2-1 X1-1
X1-1
H
SUPPLY
A
X1-2
H
A
X1-3
H
A
H
INTERVAL TIMER
(AFTER HOURS)
154 customer.honeywell.com
480V
X2-2
1M
EXHAUST
FAN
SMOKE
LOW
DETECTOR
TEMPERATURE
RETURN
THERMOSTAT
1M
FIRE
EXHAUST
120 VOLT CONTROL CIRCUIT
2TC
1CR
Fig. 75. Start-Stop Control.
480V
X1-2
2M
EXHAUST
FAN
HIGH STATIC
PRESSURE
CUTOUT
2CR
EARLY START CLOCK
OCCUPANCY CLOCK
2M
2CR
70-6925
X2-3 X1-3
OL
1TC
1M
1M
1CR
2EP
TN
NIGHT
'STAT
OL
2M
2M
OL
3M
3M
1
TC
TIME CLOCKS
2
TC
1
CR
2
CR
1EP
480V
3M
EXHAUST
FAN
X2-1
X2-2
X2-3
N
M10303