SmartPlate EV Installation, Operation and Maintenance Manual
CHAPTER 2
– INSTALLATION
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additional water from the boiler not required to maintain temperature is diverted back to
the boiler via the 3-Way Electronic Control Valve.
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Multiple SmartPlate EV installations
: Remove the factory-installed plug from port B
from at least one SmartPlate EV unit. Connect a pipe from this unit to the upper return inlet
on Benchmark Series Platinum boilers. The others may remain plugged if desired, as long
as the flow rate in each bypass line is less than 90 GPM. In all units with the plug in port
B, the 3-Way Electronic Control Valve will operate as a two-way valve.
Note that for installations not utilizing the return-port B (2-way valve operation only), be sure to
provide an alternate (diverting) flow path to the unit for zero-load conditions so as not to dead-
head the pump.
2.6 ELECTRICAL WIRING CONNECTIONS
The SmartPlate EV ECS II Control Box and all other electrical components are installed on the
unit prior to shipment from the factory. As a result, electrical connections to the ECS II consists
of connecting external AC power to the Power Box.
WARNING
The SmartPlate EV is electrically powered. ALWAYS take proper precautions to recognize,
evaluate, and control electricity hazards during installation, programming, use and
service/maintenance. Be sure that power is disconnected from the product when performing
any work with electrical connections.
The system is powered by a single-phase AC voltage of 120
–230 VAC, 50-60 Hz. However, if
Modbus Communication is desired, several additional signal lead connections must be made
inside the Control Box. These signal leads will permit the ECS II to be controlled by an external
Energy Management System (EMS), Building Automation System (BAS), or computer. Proceed
as follows:
ELECTRICAL WIRING CONNECTIONS Instructions
1. Remove the front cover from the unit to expose the Power Box.
2. Thread the power cable through one of the cut-outs in the side or rear enclosure panels.
Figure 2.6-1, Power Cable Connection
POWER CABLE
CONNECTION
