AERCO SmartPlate - Manual (Page 79)

SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8 – CORRECTIVE MAINTENANCE
OMM-0069_0E AERCO International, Inc.  100 Oritani Dr.  Blauvelt, NY 10913 Page 79 of 138
SP-100 Phone: 800-526-0288 PRI: 11/26/2013
SECTION III SMARTPLATE WETTED COMPONENTS - ALL MODELS
8.10 CONTROL VALVE ELECTRONIC MODULE REPLACEMENT AND VALVE
REMOVAL
The only replaceable item on the 3-Way Control Valve (Siemens MXG-461) is the Electronics
Module located at the top of the Valve (Figure 8-20). The procedures for removing this Module
or replacing the complete Control Valve are provided in paragraphs 8.3.1 and 8.3.2.
Figure 8-20. Control Valve (Siemens MXG-461)
8.10.1 Electronics Module Replacement
To remove and replace the Control Valve Electronics Module:
1. Turn OFF the POWER Switch on the side of the ECS/SP Control Box.
2. Loosen the two (2) captive screws securing the Electronics Module cover (Figure 8-21).
3. Remove the Module cover to access the wiring terminals (Figure 8-22). Disconnect and
tag the power and control signal wire leads from the Module terminals.
4. Using a 3 mm Allen key, loosen the three (3) socket head screws securing the blue
Electronics Module to the black Valve Head. These socket head screws are recessed and
the Allen key must be inserted into the holes shown in Figure 8-7 to engage the screw
heads.