SmartPlate Installation, Operation & Maintenance Manual
CHAPTER 4 – ADJUSTMENT
OMM-0069_0H • SP-100 • 1/30/2020 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 29 of 134
CONTROL VALVE CALIBRATION Instructions
4. Set the ECS/SP Control Box POWER switch to the ON position to apply 24 VAC power to
the Control Valve Actuator (pins 1 (G0) and 2 (G). Ensure the Valve is in the AUTO
position, the LED indicator will light green continuously indicating that Valve operation is
normal (no faults).
5. Using a pin or paper clip, depress the auto-stroke button in the opening of the terminal
housing (Figure 4-2). This will initiate calibration of the Control Valve.
6. During actuator calibration, the LED indicator (Figure 4-2) will flash green for approximately
10 seconds. The Control Valve will be briefly closed and fully opened.
7. Upon successful completion of the Valve calibration process, the LED indicator will stop
flashing and remain ON continuously green.
8. The two-color (Red/Green) indicator is useful in determining the operating status of the
Control Valve. Refer to Table 4-1 for descriptions of the possible LED status displays which
may be encountered.
TABLE 4-1. Control Valve MXG-461 LED Status Indicators
Automatic Mode (normal, no faults)
- Mechanically set to MANUAL
- Mechanically set to OFF
- Currently in Auto-Calibrate Mode
- General fault
- General calibration fault
- Microprocessor fault
- Faulty 24 VAC supply (Too low)
- No 24 VAC supply
- Electronics Module fault
9. Turn off power to the Control Valve by setting the ECS/SP Control Box POWER switch to
the OFF position.
10. Replace and secure the Electronics Module cover by tightening the two captive screws.
WARNING!
MANUAL CONTROL OPERATION OF THE 3-WAY VALVE DISABLES THE OVER-
TEMPERATURE & POWER LOSS SAFETY SHUTDOWN FEATURES OF THE SYSTEM.
MANUAL OPERATION IS ONLY USED FOR PROBLEM DIAGNOSIS.
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