DeWalt D55170 Guide D'utilisation page 12

FEATURES (Fig. 1)
DUAL CONTROL
D55390, D55395, D55570, D55575, D55580, D55585
Dual control allows the compressor to operate in the constant
run or the stop/start mode of operation. The pilot valve (H) is
used to control the compressor when operating in the constant
run mode. The pressure switch is used to control the compressor
when operating in the stop/start mode. The mode of operation is
determined by the amount of time the compressor will be required to
supply air. If the demand for air is infrequent, then the unit should be
operated in the stop/start mode to minimize unnecessary run time
and to save energy. If there is a frequent or extended demand for
air, and/or the unit is located in a remote area where access to the
compressor is difficult, the unit should be operated in the constant
run mode to minimize the number of times the motor must start in
an hour to ensure good motor life.
DUAL VOLTAGE
D55570, D55575, D55580, D55585
The dual voltage (L) feature allows the
compressor to operate in 115 or 230 volt
operation. The advantage of running in the 230
volt operation is a lower current draw. Lower
current draw may be necessary in areas with a
poor power source. Lower current also reduces
operating costs. See 230 Volt Conversion
under Installation.
PILOT VALVE
D55390, D55395, D55570, D55575, D55580, D55585
When the maximum air tank pressure is obtained,
the pilot valve (H) will blow-off. This will cause the
compressor to exhaust the air though the the pump
head and not fill the tank.
Pilot Valve with Manual Lock (D55170, D55180):
The manual lock allows you to manually unload the
compressor with air pressure in the air tank.
To operate the manual lock:
Rotate the manual lock pilot valve lever to the
open position to prevent air tank pressure
buildup. Rotate manual lock pilot valve lever to
the closed position after starting the motor to
allow air tank pressure to build. NOTE: Air will
not build in tank when manual lock pilot valve
lever is in the open position.
PRESSURE SWITCH
D55390, D55395, D55570, D55575, D55580, D55585
L
The pressure switch (M) automatically starts the motor when the air
tank pressure drops below the factory set cut-in pressure. It stops
the motor when the air tank pressure reaches the factory set cut-out
pressure. The pressure release valve located on the side of the pres-
sure switch, is designed to automatically release compressed air from
the compressor head and the outlet tube when the air compressor
reaches cut-out pressure or is shut off. The pressure release valve
allows the motor to restart freely. When the motor stops running, air will
be heard escaping from this valve for a few seconds. No air should be
heard leaking when the motor is running.
12
H
H
H
CLOSED
OPEN