SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 8
– CORRECTIVE MAINTENANCE
OMM-0069_0H
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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 8-21). The procedures for removing this Module
or replacing the complete Control Valve are provided in sections 8.10.1 and 8.10.2, below.
ELECTRONICS
MODULE
VALVE
BODY
HANDWHEEL
Figure 8-21. Control Valve (Siemens MXG-461)
8.10.1 ELECTRONICS MODULE REPLACEMENT
To remove and replace the Control Valve Electronics Module:
ELECTRONICS MODULE REPLACEMENT Instructions
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 8-22).
3. Remove the Module cover to access the wiring terminals (Figure 8-23). 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 8-23 to engage the screw
heads.
5. Pull straight up to unplug the Module from the Valve Head.
6. Install the replacement Electronics Module on the Valve Head and secure it with the three
