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PLC (Additional logic functions)
- This device provides a 10 second time delay period in which the oil
pressure switch output is shorted, thus allowing the oil pump to build minimum pressure (5 psig) before a
shutdown signal must take place to protect the compressor. This device also provides power to the
auxiliary blowdown pressure switch while the compressor is running.
Emergency Stop/Push Button
- This is a maintained push-button, and removes power from the
controller outputs regardless of controller status. It is located on the upper section of the panel, next to
the keypad. This should be used for emergency purposes only - use the keypad [STOP/RESET] for
normal controlled stopping.
WARNING
Automatic restarting or electrical shock can cause injury or death. Open, tag
and lockout main disconnect and any other circuits before servicing the unit.
Control Transformer
- This changes the incoming power voltage to 110-120 volts for use by all unit
control devices. Two primary and one secondary fuse are provided. Refer to adjacent labeling for
replacement information.
Terminal Strip
- This provides connections for all 110-120 volt devices not contained within the
enclosure.
Fan Starter
- The starter is used to provide control and overload protection for the fans. Overload
heaters should be selected and adjusted based on the motor nameplate amps and the instructions
located inside the cover of the electrical enclosure.
Main Starter
- This starter is used to provide control and overload protection for the main drive motor.
Full voltage starters employ a single contactor. Overload heaters should be selected and adjusted based
on the motor nameplate amps and the instructions located inside the cover of the enclosure. Wye-Delta
starters employ three contactors which are controlled sequentially to provide low current starting. For
Wye-Delta starters, the motor nameplate amps must be first multiplied by 0.577 before using the heater
table.
Summary of Contents for PUREAIR EWD99E
Page 7: ...13 11 608 Page 2 Figure 1 2 PACKAGE ILLUSTRATION AIR COOLED 302EWD797 A Ref Drawing...
Page 8: ...13 11 608 Page 3 Figure 1 3 PACKAGE ILLUSTRATION WATER COOLED 303EWD797 A Ref Drawing...
Page 9: ...13 11 608 Page 4 Figure 1 4 WATER COOLED SCHEMATIC 300EWD797 D Ref Drawing...
Page 10: ...13 11 608 Page 5 Figure 1 5 AIR COOLED SCHEMATIC 301EWD797 D Ref Drawing...
Page 30: ...13 11 608 Page 25 Figure 4 2 FLOW CHART FOR SETUP PROGRAMMING 300EWC1255 Ref Drawing...
Page 44: ...13 11 608 Page 39 301EWD546 B Ref Drawing Page 2 of 2...
Page 46: ...13 11 608 Page 41 302EWD546 B Ref Drawing Page 2 of 2...
Page 48: ...13 11 608 Page 43 303EWD546 B Ref Drawing Page 2 of 2...