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the oil reservoir. When the air pressure on the up-
stream side rises above 65 psig, the valve opens to full
porting. The valve is adjustable within a small range.
It is adjusted by a screw on the side of the valve. By
turning the screw, the minimum pressure required to
open the valve increases. Conversely, backing it out
decreases the minimum pressure required to open the
valve.
To service the valve, unscrew the valve cap from the
body. The internal parts will all come out after the cap
has been removed. Repair kits are available from your
local authorized Gardner Denver Distributor.
System Pressure Transducer – This transducer is
connected after the minimum pressure valve and dis-
charge check valve. It converts the pressure in the
plant air system to an electrical signal for use by the
programmable controller for modulation and control.
Reservoir Pressure Transducer – This transducer is
connected to the oil reservoir. Its signal is used to pre-
vent loaded starts, monitor oil pressure, and for separa-
tor differential.
Air Filter Vacuum Switch – This switch is used to
monitor the air filter condition and alert the user if the
filter requires service or replacement.
Vibration Switch (Optional Equipment) – The op-
tional vibration shutdown switch, mounted on the com-
pressor coupling cover, detects an increase in vibration
that could be an indication of impending damage to the
unit. The switch actuates when the selected level of
vibration is exceeded.
The switch MUST BE ADJUSTED when the unit is first
installed. Refer to switch manufacturer’s instruction
manual for complete details.
STARTER/CONTROL PANEL
The following items are located in the electrical enclo-
sure and provide the main control of the compressor
unit and switching of the motor(s). Refer to
FIGURE 1–3, page 2.
AUTO SENTRY–ES – The ”Auto Sentry–ES” is lo-
cated on the upper section of the panel. It provides all
the control of the motors and control devices for safe
and efficient operation of the compressor unit. Its dis-
play provides all gauging functions, shutdown causes,
and maintenance recommendations. The keypad pro-
vides the user with selection of operating modes and
adjustment to tune the controls for the application. It is
connected to other devices inside the panel and exter-
nal devices through the terminal strip. The ”Auto
Sentry–ES” requires no maintenance.
Emergency Stop – This is a maintained pushbutton,
and removes power from the controller outputs regard-
less of controller status. It is located on the upper sec-
tion of the panel, next to the keypad and should not be
used for normal shutdown.
Automatic restarting or electrical
shock can cause injury or death.
Open, tag and lockout main discon-
nect and any other circuits before
servicing unit.
Control Transformer – This changes the incoming
power voltage to 110/120 volts for use by all unit control
devices. Two primary fuses and one secondary fuse
are provided. Refer to the adjacent labelling for re-
placement information.
Terminal Strip – This provides connections for all
110/120 volt devices not contained within the control
panel.
Fan Starter – The starter is used to provide control and
overload protection for the ventilation fans of units with
enclosures. Overload heaters should be selected
based on the nameplate AMPS of the fan motor. Three
fuses are provided. Refer to the heater table glued in-
side the starter enclosure.
OPERATION
Operation of the ”AUTO SENTRY–ES” is dependent
on selection of an operating mode from the controller
keypad. Prior to starting, the ”STOP/RESET” key must
be pressed to place the control in its ready state. Op-
eration may then be started by selecting an operating
mode from the controller keypad. Once operating, the
operating mode may be changed at any time. The
STOP/RESET key may be pressed at any time to stop
the compressor under normal conditions.
An optional control may be wired to the control to inter-
rupt and restart the unit based on controls by others.
When stopped by these controls, the display will indi-
cate REMOTE STOP.
Automatic restarting or electrical
shock can cause injury or death.
Open, tag and lockout main discon-
nect and any other circuits before
servicing unit.
Summary of Contents for ELECTRA-SAVER EAU PD - 200 HP
Page 13: ...13 10 612 Page 3 FIGURE 1 4 STARTER BOX FIGURE 1 5 PACKAGE CONTROLLER AND STARTERS...
Page 16: ...13 10 612 Page 6 DECALS 206EAQ077 212EAQ077 218EAQ077 211EAQ077 207EAQ077...
Page 17: ...13 10 612 Page 7 DECALS 216EAQ077 217EAQ077 222EAQ077 221EAQ077 208EAQ077...
Page 40: ...13 10 612 Page 30 FIGURE 4 8 CONTROL SCHEMATIC COMPRESSOR AT FULL LOAD 214ECM797 Ref Drawing...
Page 42: ...13 10 612 Page 32 FIGURE 4 10 WIRING DIAGRAM 212EAP546 Ref Drawing...
Page 43: ...13 10 612 Page 33 FIGURE 4 11 AUTO SENTRY ES CONTROLLER DISPLAY...
Page 45: ...13 10 612 Page 35 FIGURE 5 1 FLOW DIAGRAM AIR OIL SYSTEM 215EAU797 Ref Drawing...
Page 65: ......