13–8–610 Page 16
SECTION 4
CONTROLS & INSTRUMENTATION
GENERAL – The Gardner Denver
EDE Electra–
Screw
compressor is supplied with a factory mounted
starter and complete controls as standard equipment.
The standard control system consists of constant run
load/unload operation, or auto start/timed stop opera-
tion. Lead/Lag operation of two EDE compressors is
also possible without additional equipment. Inlet valve
modulation is standard.
PROTECTIVE DEVICES – All compressors incorpo-
rate the following protective devices:
Standard Domestic Motor Protection Devices –
Overload heaters are furnished for the starter in the
voltage range specified. There are three (3) overloads
in the starter of proper size for the starter and its enclo-
sure. An overload trip is indicated by the “MOTOR
OVERLOAD” LED located on the control keypad.
Optional Domestic Motor and Standard Interna-
tional Protective Devices – Wye–Delta Starter –
Overload heaters are furnished for the starter in the
voltage range specified. There are three (3) overloads
in the starter of proper size for the starter and its enclo-
sure. Note that motor nameplate current must be multi-
plied by .577 for wye–delta starters. Proper starter coil
and contact action is also monitored to ensure proper
operation.
Separator Differential Pressure – The Separator dif-
ferential pressure is continually monitored by the mi-
croprocessor controller. At a differential of approxi-
mately 8 PSI (.6 Bar), the “CHANGE SEPARATOR”
LED located on the control keypad flashes indicating
required maintenance. If the warning is ignored, and
the separator differential continues to increase, the mi-
croprocessor controller will stop the unit at 15 PSI (1
Bar) and the LED will remain on steady. See “Control
System Operation,” page 18, for further information on
operation of the microprocessor controller.
High Discharge Temperature – The compressor is
protected from high discharge temperature by two in-
dependent thermistor probes. One probe is located in
the compressor discharge housing to sense compres-
FIGURE 4–1 – CONTROL SCHEMATIC
203EDE797
(Ref. Drawing)
Summary of Contents for ELECTRA-SCREW EDEQHH
Page 11: ...13 8 610 Page 3 200EDE797 Ref Drawing FIGURE 1 3 PACKAGE OIL LEVEL GAUGE SEPARATOR AIR FILTER...
Page 12: ...13 8 610 Page 4 202EDE797 Ref Drawing FIGURE 1 4 PACKAGE CONTROLLER STARTER BOX...
Page 15: ...13 8 610 Page 7 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 16: ...13 8 610 Page 8 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 33: ...13 8 610 Page 25 FIGURE 4 10 WIRING DIAGRAM FULL VOLTAGE DUAL CONTROL 204EDE546 Ref Drawing...
Page 34: ...13 8 610 Page 26 FIGURE 4 11 WIRING DIAGRAM WYE DELTA 205EDE546 Ref Drawing...
Page 53: ......
