AERCO Electronic Controls System (ECS) - Manual (Page 10)

Electronic Control System (ECS) and Type CXT-E Valve
1. GENERAL INFORMATION
Page 10 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
MODEL 69012-1
FRONT PANEL FOR STEAM-TO-WATER HEATERS
B-PLUS
TM
PT.NO.
SET
F
AUTO RUN
MAN HOLD
OP 1 OP 2
SP2 REM
2408
OVER TEMP SWITCH
TEMP CONTROLLER
PT.NO.
WATER HEATER
MODEL 69012-2
FRONT PANEL FOR WATER-TO-WATER HEATERS
SET
F
SET
F
SET
F AUTO RUN
MAN HOLD
OP 1 OP 2
SP2 REM
2408
PT.NO.
OVER TEMP SWITCH
BOILER WATER TEMP TEMP CONTROLLER
E-PLUS
WATER HEATER TM
PT.NO.
OUT
IN
Figure 1-3. ECS Control Box Models Showing Front Panel Differences
The Control Box is the heart of the ECS. It contains the Temperature Controller, an Over-
Temperature Switch and, when required, Inlet/Outlet Temperature Indicators for Water-to-Water
applications. The Temperature Controller is the “brain” of the ECS which processes data
received from the temperature and flow sensors. Using PID (Proportional Integral Derivative)
algorithms, the Temperature Controller provides a 4-to-20 mA control signal to the Control Valve
Actuator which precisely modulates the Control Valve for optimum outlet temperature control.