SmartPlate EV Installation, Operation and Maintenance Manual
CHAPTER 1
– GENERAL INFORMATION
OMM-0147_C
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1.3 ELECTRONIC CONTROL SYSTEM II (ECS II)
All SmartPlate EV models contain identical Electronic Control Systems, referred to as ECS II.
This system contains a Control Box, which includes all of the electronic circuitry for the ECS II.
In addition, it includes several sensors and safety devices which provide temperature and flow
control information to the Control Box circuitry, as shown below. The devices included in the
ECS II are:
•
Feed-Forward Flow Meter
•
DHW (Domestic Hot Water) Outlet Dual Temperature Sensors (Type J Thermocouples)
•
Boiler Water Inlet Temperature Sensor (Type J Thermocouple)
•
Over-Temperature Alarm (With Safety Shutdown)
•
3-Way Control Valve and By-Pass Outlet
The ECS II includes a Modbus communication option. This option permits the ECS II to be
externally controlled by an Energy Management System (EMS), Building Automation System
(BAS), or a computer supplied by other manufacturers.
The ECS II assemblies and components are described in the following sections.
NOTE:
On preliminary release units the Control Box is shaped differently but has the same
components and functionality.
Figure 1.2. Electronic Control System (ECS II)
CONTROL BOX
INLET AND OUTLET
TEMP SENSORS
3-WAY CONTROL
VALVE
TEMPERATURE
CONTROLLER
OVER-TEMPERATURE
INDICATOR/SWITCH
ENABLE/DISABLE
SWITCH
FLOW METER
