SmartPlate EV Installation, Operation and Maintenance Manual
CHAPTER 8
– CORRECTIVE MAINTENANCE
OMM-0147_C
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3-WAY CONTROL VALVE REPLACEMENT Instructions
Figure 8.2.2.1. Control Valve Replacement
– Rear View
5. While supporting the Control Valve from above, loosen all three (3) unions securing the
Valve.
6. Inspect the union seals and seats.
7. Install the replacement Control Valve and ensure that the seals are not pinched. Hand-
tighten the unions.
CAUTION!
Two (2) pipe wrenches MUST be used when tightening the Valve unions to prevent pipe
rotation and avoid leaks
8. Using two (2) pipe wrenches, secure the Control Valve unions to the Boiler Water piping.
9. Refer to Figure 8.2.2.1 and ensure that the three (3) DIP switches on the Electronics
Module of the replacement Valve are all in the following positions: 1 = ON, 2 = ON, 3 = ON,
4 = OFF.
10. Reconnect the power and control signal wire leads to the Electronics Module of the
replacement Control Valve.
11. Turn the Enable/Disable switch on the Control Box to
Enable
.
12. Recalibrate the Control Valve using the procedures in Chapter 4, Section 4.2.1.
13. After the Valve has been successfully calibrated, replace the Electronics Module
’s cover.
14. Return the unit to service.
ISOLATION BALL
VALVES (2)
3-WAY CONTROL
VALVE
BLOW-DOWN VALVE
(Connect Drain Hose Here)
ISOLATION BALL
VALVES (2)
