Integral Dryer Option - Sullair 3000P User Manual

3000P-4500 USER MANUAL
2.8

INTEGRAL DRYER OPTION

An integral refrigerated dryer option is available. The
integral dryer is designed to work with the
compressor WS controller which controls dryer
starting and stopping, condensate drain valve
function and monitors dewpoint temperature and
dryer warnings and faults.
connected from the factory and is ready to run when
the compressor is installed.
Detail of dryer operation and spare parts can be
found in a supplement Manual 02250174-308 which
is provided with your machine.
Per the controller default settings, on initial start-up
the compressor will run unloaded for 5 minutes,
allowing the dryer to run and cool down.
prevents condensate from initially being allowed into
the compressed air stream. It also delays the supply
of compressed air from the compressor until the 5
minute cool-down period is completed. When the
automatic control mode is selected, the compressor
will stop after running unloaded for a prescribed time,
but the dryer will continue to run to ensure there will
not be a surge of condensate when the compressor
re-starts. For other settings and control options, refer
to the WS controller manual 02250165-411, or to
your authorized Sullair servicing distributor.
In case the compressor needs to operate while the
dryer is being serviced, the dryer can be bypassed,
and removed if necessary for service. To bypass the
dryer, disconnect the inlet hose to the dryer,
disconnect the outlet hose at the main service
connection, and re-connect the dryer inlet hose to the
main service connection.
powering the dryer and control wiring located in the
compressor electrical box. The WS controller must
be set-up for the compressor to run on dryer fault. If
necessary, this can be reset by your authorized
Sullair servicing distributor.
2.9 VARIABLE SPEED DRIVE
(VSD) COMPONENTS
The VSD, located in the machine's electrical
enclosure, works in concert with the WS Controller to
allow the compressor to match its output to the
current demand of the system. The drive's heat sink
extends through the back of the enclosure, and its
cooled by aiir flowing through the compressor
enclosure.
20
The dryer is fully
This
Remove the fuses
2.10 VSD CONTROL SYSTEM
FUNCTIONAL DESCRIPTION
Refer to Figure 2-4. The controls consist of:
• a VSD
• a solenoid valve
• a regulating valve
• and an inlet valve.
Depending on the model, a compressor can be
operated at a setpoint pressure from 60 to 175 psig
(4.1 to 12.1 bar). The WS Controller automatically
sets the frequency range based on the selected
pressure. (The compressor's operating range is on
its nameplate.)
The following paragraphs apply to a compressor with
a 100 psig (6.9) operating pressure and a 6 psi (0.4
bar) load delta setting.
NOTE
The load delta default setting is 10 psi (0.7
bar). Sullair recommends a setting of 6
psi (0.4) for the most efficient operation.
Compressors with different pressure operating
ranges perform in the same manner.
START MODE - 0 TO 50 PSIG (0 TO 3.5
BAR)
Pressing the WS Controller START button (1) signals
the VSD to accelerate the motor to full speed,
causing the separator/sump tank pressure to rise
from 0 to 50 psig (0 to 3.4 bar). At this time both the
pressure regulator and solenoid valves are closed;
the inlet valve is fully open and the air-end provides a
full flow to the separator/sump tank. A minimum
pressure valve set at approximately 50 psig (3.4 bar)
isolates the rising compressor air pressure from the
service line.
FULL LOAD MODE - 50 TO 100 PSIG (3.4
TO 6.9 BAR)
When the compressed air pressure rises above 50
psig (3.4 bar) the minimum pressure valve opens
allowing compressed air to flow into to the service
line. From this point on the WS Controller monitors
the line pressure which controls the VSD. The
pressure regulator and solenoid valves remain
closed with the inlet valve fully open, running at 100
psig (6.9 bar) or lower.
SECTION 2