AERCO Electronic Controls System (ECS) - Manual (Page 34)

Electronic Control System (ECS) and Type CXT-E Valve
5. FUNCTIONAL DESCRIPTION
Page 34 of 82
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, New York 10913 • Phone: 800-526-0288 VD2: 02/28/14
OMM-0003_0D AC-105
COLD
WATER
IN
ACTUATOR
FLOW
SENSOR
HEAT
EXCHANGER
CONTROL VALVE
CXT
-E
STEAM
IN
4 – 20 mA CONTROL SIGNAL
FEED
-FWD SIGNAL
TO
DRAIN
OVER
-TEMP
SOLENOID
VALVE
TEMPERATURE
CONTROLLER
120
VAC
IN
HOT
WATER
OUT
DUAL OUTLET TEMPERATURE THERMOCOUPLE
CONTROL BOX
HEAT
EXCHANGER
OVER
-TEMP
24
VDC
DC POWER
SUPPLY
(0
–
5
VDC
)
24
VDC IN
CONDENSATE OUT
WATER TEMPERATURE
TEMP
SWITCH
24
VDC
12
VDC
Figure 5-1. ECS Simplified Block Diagram