AERCO SmartPlate - Manual (Page 42)

SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 6 – SCHEDULED MAINTENANCE
Page 42 of 138 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0069_0E
PRI: 11/26/2013 Phone: 800-526-0288 SP-100
6.5 STRAINER INSPECTION AND CLEANING
Every 6 months, check and clean the Strainers in both the Boiler Water and Domestic Water
piping of the SmartPlate Water Heater. Perform the following steps for each Strainer:
1. Attach a hose to the blow-down valve at the base of the Strainer. Cycle the blow-down
valve open and closed 6 times.
2. If the Strainer cannot be cleared using the procedure described above, refer to Chapter 8
– Corrective Maintenance, paragraph 8.5.
6.6 CONTROL VALVE OPERATIONAL CHECK
Refer to Chapter 4, paragraph 4.2 and recalibrate the Control Valve. Also, check the LED
indicator to ensure the Valve is functioning correctly.
NOTE
To avoid repeated draining of the Heater, perform the annual
scheduled maintenance checks specified in paragraphs 6.7 and
6.8 at the same time.
6.7 TEMPERATURE SENSOR CHECKS
The SmartPlate Water Heater contains a Feed-Forward Temperature Sensor in the Mixed
Water Manifold and a Dual Temperature Sensor in the DHW Outlet Port. Once each year,
these Sensors should be checked to ensure there is no scale build-up.
1. Turn OFF the POWER switch on the side of the ECS/SP Control Box to disconnect AC
power from the Heater.
2. Close the Inlet and Outlet Isolation Valves on the Boiler Water and DHW lines of the
Heater.
3. Connect a hose to the Drain Valve and run it to a convenient floor drain. Open the Drain
Valve near the DHW Outlet to drain the water from the pipes and Heat Exchanger.
4. Disconnect and remove the Single Feed-Forward Sensor from the Manifold and the Dual
Outlet Temperature Sensor from the DHW Outlet Port (Figure 6-1).
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.
6.8 RECIRCULATION PUMP CHECK
The Recirculation Pump is installed between the DHW inlet and outlet pipes beneath the Mixed
Water Manifold.