SmartPlate EV Installation, Operation and Maintenance Manual
CHAPTER 6
– SCHEDULED MAINTENANCE
OMM-0147_C
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6.5 3-WAY CONTROL VALVE OPERATIONAL CHECK
Refer to Chapter 4, Section 4.2 and recalibrate the 3-Way Control Valve. Also, check the LED
indicator to ensure the Valve is functioning correctly.
NOTE:
To avoid repeated draining of the Water Heater, perform the annual scheduled maintenance
checks specified in section 6.9 at the same time.
6.6 SENSOR CHECKS
SmartPlate EV Water Heaters contain a Flow Meter, Pressure Transducers, DHW inlet
temperature sensor, DHW outlet temperature sensor, and BW inlet temperature sensor. Once
each year, these sensors should be checked to ensure there is no scale build-up.
SENSOR CHECKS
Instructions
1. Turn the power switch on the side of the ECS II Control Box to
OFF
to disconnect AC
power from the unit.
2. Close all 4 Inlet and Outlet Isolation Valves on the Boiler Water and DHW lines of the unit.
3. Drain as much water as possible from the strainers. The remaining water in the piping may
be drained using either a water vacuum or by slowly removing the sensor from the port.
4. Disconnect and remove the Cold Water Inlet Sensor from the cold-water inlet piping and
the Outlet Temperature Sensor from the DHW Outlet piping.
Figure 6.6. Location of Temp Sensors
– Front View
5. Inspect the Sensors for evidence of scale build-up on the stainless-steel sleeve of the
Sensors. If necessary, clean the Sensors using a wire brush.
6. In addition to the immersion Sensors mentioned above, check the attachment of the
surface-mount Sensors on the Boiler Water Inlet and Outlet piping.
OUTLET
TEMPERATURE
SENSOR
COLD WATER
INLET SENSOR
