AERCO SmartPlate - Manual (Page 82)

SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8 – CORRECTIVE MAINTENANCE
Page 82 of 138 AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 OMM-0069_0E
PRI: 11/26/2013 Phone: 800-526-0288 SP-100
10. Using two (2) pipe wrenches, resecure the Control Valve unions to the Boiler Water
piping.
11. Refer to Figure 8-7 and ensure that the three (3) DIP switches on the Electronics Module
of the replacement Valve are all in the OFF (down) position.
12. Reconnect the power and control signal wire leads to the Electronics Module of the
replacement Control Valve.
13. Turn ON the POWER Switch on the side of the ECS/SP Control Box.
14. Recalibrate the Control Valve using the procedures in Chapter 4, paragraph 4.2.1.
15. Replace the cover on the Electronics Module after the Valve has been successfully
calibrated.
16. Return the SmartPlate Water Heater to service.
8.11 RECIRCULATION PUMP REPLACEMENT
The SmartPlate Recirculation Pump is a wet rotor, continuous-duty Pump which has an
expected service life of 5 years. The Pump is located in the DHW side of the piping assembly
(Figure 8-24) to continuously circulate domestic water through the SmartPlate Heater, even
when there is no DHW demand. If the Pump fails, it must be replaced to ensure proper Heater
operation. Replacement is accomplished as follows:
1. Turn OFF the external power circuit breaker to the SmartPlate and also turn OFF the
POWER Switch on the side of the ECS/SP Control Box.
2. Connect a hose to the DHW Drain Valve (Figure 8-24).
3. Close both Isolation Ball Valves on the DHW piping.
4. Open the DHW Drain Valve.
5. Remove the 1/4” NPT plug from the DHW Strainer to allow air to enter the piping while
draining.
6. Disconnect the power leads from the Pump Head.
7. Remove the bolts on the Pump flanges and slide the Pump out from between the flanges.
8. When installing the replacement Recirculation Pump, ensure that the seals are in place
and are not pinched.
9. Reinstall the flange bolts and reconnect the power leads to the Pump Head.
10. Replace the 1/4” NPT plug on the Inlet Strainer.
11. Close the DHW Drain Valve that was opened in step 4.
12. Connect a hose to the Blow-Down Valve on the Inlet Strainer. Open this Blow-Down Valve
on the Strainer to vent air during the filling process.
13. Open the lower Isolation Ball Valve (DHW Outlet).
14. Next, close the Blow-Down Valve on the Inlet Strainer and open the upper Isolation Ball
Valve (DHW Inlet).
15. Reconnect the power leads to replacement Recirculation Pump Head.