Sterlco M2B+ Controller - Manual (Page 23)

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4-3 Starting and Stopping Hot Oil TCUs
Starting the Unit (Local)
Press the Start button to begin the following sequence of events:
1. The green LED inside the Start button lights up.
2. The LCD backlight lights up.
3. The Pump Output turns on.
4. The LCD displays the setpoint value, process temperature, return temperature, and
delta temperature.
5. If the Auto Vent Cycle parameter is enabled, the Vent Output turns on, the green
LED blinks, and the LCD alternates between “Mode is OFF,” “Press START to
Run,” and “Vent Time = mm:ss.”
6. When the Auto Vent timer expires or if the Auto Vent Cycle parameter is disabled,
the LCD alternates between “Mode is Off” and “Press START to Run.”
7. Press the Start button. The display reads “Vent Time = mm:ss.”
8. When the vent time expires, the LCD displays “RUNNING,” and system control
begins.
Stopping the Unit
While the system is running, press the Stop button to shut down the system. If the current
process temperature is above 150ºF, pressing the Stop button will begin the following
sequence of events:
9. The LCD displays “SHUTDOWN [Cool Down].”
10. The setpoint changes to 150ºF.
11. The Heat Outputs will turn off.
12. The Cool Output will turn on.
13. The system waits for the process temperature to drop down to 150ºF.
Shutdown temperature is adjustable from 90 8 F to 180 8 F. See Section
5-14 for procedure.
14. At 150ºF, the LCD displays “SHUTTING DOWN.”
15. All outputs immediately turn off.
16. The system re-cycles to the “Power Available/System OFF” state.
Pressing the Stop button a second time while the controller is in the
“SHUTDOWN [Cool Down]” mode will abort this cool down operation
and the system will immediately go into the “SHUTTING DOWN” phase
of the operation.
If the process temperature is below 150ºF, all outputs will turn off, and the controller will
enable Pump Reverse mode. The LCD will display “Shutdown [PmpRevOff]” for 30 seconds
before the system re-cycles to the “Power Available/System OFF” state.
During the 30-second “Shutdown[PumpRevOff] mode, press the Up button to reverse the
pump and purge oil from the mold. During pump reverse, the Vent Output and Pump
Reverse outputs will turn on. The LCD will display “Shutdown[PmpRevON] until the Up