13–11–602 Page 22
plications with long unloaded periods and adequate
storage to allow the compressor to be stopped for peri-
ods. Operation during periods of moderate to heavy
demands is identical to the low demand mode de-
scribed above.
The automatic time delay is adjustable from 5 to 20
minutes. If the controller operates unloaded for this pe-
riod with no demand, the compressor drive motor is
halted to eliminate its power consumption. The con-
trols will remain in this state until demand is again indi-
cated by a drop in pressure.
Sequence Mode Operation – This mode provides for
communication between controllers, operating only as
many as are required for economical operation. This
is best used on applications with large storage capacity
and diverse loads. The lead unit will operate identically
to the automatic mode; operation will be automatically
staged for each lag unit (up to 8 total). For more in-
formation, refer to the sequencing instructions later in
this section.
Communication between controllers is achieved by in-
terconnection of a communications cable to circuit
board connectors. A “unit number” must be assigned
to each unit in this mode, but the display will indicate the
unit’s actual operating ranking.
The automatic time delay is adjustable from 5 to 20
minutes. If the controller operates unloaded for this pe-
riod with no demand, the compressor drive motor is
halted to eliminate its power consumption. The con-
trols will remain in this state until demand is again indi-
cated by a drop in pressure.
AUTO–SENTRY
–ES CONTROL DISPLAY
The display above the keypad is used to provide oper-
ating information to the user. If a shutdown has oc-
curred, the display will indicate the cause.
During normal operation, the display will show the sys-
tem pressure, compressor discharge temperature, to-
tal running hours, and operation mode. Alternate dis-
plays are available by pressing keypad cursor keys,
and will be identified on the display. These include sys-
tem pressure, system temperature, oil pressure, oil
temperature, total hours, loaded hours, reservoir pres-
sure, compressor discharge temperature, and water fil-
ter differential pressure. In Low Demand, Automatic,
and Sequence modes, alternate displays also include
the appropriate remaining times of the time delays. If
FIGURE 4–1 – AUTO SENTRY
–ES DISPLAY
Summary of Contents for TWISTAIR EWDQ D
Page 14: ...13 11 602 Page 4 FIGURE 1 6 AIR WATER SCHEMATIC FIGURE 1 7 OIL SCHEMATIC...
Page 17: ...13 11 602 Page 7 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 18: ...13 11 602 Page 8 DECALS 216EAQ077 206EWD077 222EAQ077 221EAQ077 208EAQ077...
Page 35: ...13 11 602 Page 25 FIGURE 4 2 FLOW CHART FOR SET UP PROGRAMMING...
Page 44: ...13 11 602 Page 34 FIGURE 4 6 CONTROL TUBING SCHEMATIC 206EWD797 A Ref Drawing...
Page 48: ...13 11 602 Page 38 FIGURE 4 10 WIRING DIAGRAM FULL VOLTAGE 202EWD546 REF DRAWING...
Page 49: ...13 11 602 Page 39 FIGURE 4 11 WIRING DIAGRAM WYE DELTA 203EWD546 REF DRAWING...
Page 50: ...13 11 602 Page 40 FIGURE 4 12 AUTO SENTRY ES CONTROLLER DISPLAY...
Page 53: ...13 11 602 Page 43 FIGURE 5 2 FLOW DIAGRAM AIR COOLED 202EWD797 B Ref Drawing...
Page 54: ...13 11 602 Page 44 FIGURE 5 3 FLOW DIAGRAM WATER COOLED 203EWD797 A Ref Drawing...
Page 68: ......
