MNL-0408
June 11, 2009
Page 75
7.4.3
Emergency Stop Switch.
There is a Emergency Stop Switch on the panel. This is a 22 mm device with a 40mm mushroom head.
The button must be pulled out for the unit to operate. In an emergency, depress the push button, which
will shutdown the electric motor and all other periphery devices. Do not use the Emergency Stop
Switch for securing the equipment under normal operation. Use the Compressor Control Switch. The
PLC operating memory is maintained by a internal battery in the PLC. Removing all power from the
compressor will allow the battery to discharge over a 30 day period. Apply power to the unit by pulling
out the Emergency Stop Switch, and leave on for at least 8 hours every 30 days.
7.4.4
Starter Reset
There is a blue 22mm push button on the door of the electrical enclosure with the letter “R” at its center.
Pushing this button will reset the thermal overload relay on the motor starter. Should the electric motor
have overloaded and tripped out during normal operation, then depressing this button after giving some
time to cool, will reset the overload relay portion of the motor starter.
Figure 7-5
Electrical Panel Assembly
1. Compressor Control Switch
2. Warning Light
3. Alarm Light
4. Hourmeter
5. Starter Reset
6. Emergency Stop Switch
1
2
3
4
5
6