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Scroll Enclosure Air Compressors

11. Visually check the rotation of the

compressor pump. The rotation
should be counterclockwise if
viewing the compressor from the
pulley or belt side of the motor or
the air end. If the rotation is incor-
rect, have a qualified electrician
correct the motor wiring.

START-UP AND OPERATION

Follow all the procedures under

“Before start-up” before attempt-
ing operation of the compressor.

2. Switch on the electric source

breaker.

3. Make sure electric source lamp

lights up and that the caution
code or alarm code does not show
up on the display on the PLC.

Note: The alarm lamp light will come
on if a temperature sensor is not con-
nected. If the sensor is not connected,
have a qualified service person recon-
nect the sensor.

4. Open the discharge valve com-

pletely.

5. Push ON button and check that

the compressor operates without
excessive vibration, unusual noises
or leaks.

6. Close the discharge valve com-

pletely.

7. If the pressure does not rise on

a three phase unit, turn the
unit off. Have a qualified elec-
trician switch the breaker OFF
and exchange the L1 and L2
connections (two out of three
phases of electric source)
inside the magnetic switch.

8. Check the discharge pressure. Also

make sure the air pressure rises to
the designated pressure setting by
checking the discharge pressure
gauge.

Control Logic:

Since these compres-

sors are designed using multiple air-
ends, they are using multiplex con-
troller. The controller will start and
stop each air-end according to the
pressure and air consumption.

10HP CONTROLLER (SED1007)

1) 10HP unit consists of two air ends.

One is the lead air end, and the other
is the lag air end. These two units will
alternate every 30 running minutes
(this default value can be changed,
see instruction on "Set Mode".

2) After the ON button is activated,

both air end will start and pressure
gauge on the control panel rises.

3) When the pressure reaches 107.6 psig

the lag air end will stop. When the
pressure rises reaches 113.1 psig the
lead air end will also stop.

4) As the discharge pressure drops down

to 100.3 psig the lead air end will
start again. The lag air end will start
when the pressure drops down to
93.0 psig.

5) The status of each air end can be

monitored from the control panel.

15 AND 20HP CONTROLLER (SET1507,
SEQ2007)

1) Alternating Control:

The controller will equalize the oper-
ating hours on each air-end. It will
alternate between the air end with
the most running time and the air
end with the lowest running time.

2) Prevention of long term operation:

When an air-end has been operating
longer than the set-time, the con-
troller will alternate to the air-end
with the lowest running time. This
will prevent one air end from running
continuously for too long and will

equalize the running time between
the available air ends.

SHUT-DOWN

1. Stop the compressor by pushing the

OFF button.

NOTE: If the compressor rotates in
reverse for more than five seconds, the
check valve needs to be cleaned or
replaced.

2. Switch the breaker OFF if the com-

pressor is not to be used for a long
period of time.

STOPPING THE COMPRESSOR DURING
NORMAL OPERATION

1. Close the discharge valve.
2. Allow the air pressure to build and

the compressor to stop.

3. Turn the compressor off by pushing

the OFF button.