Sullair 1000-DBP, User & Service Manual

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DBP BLOWER PURGE HEATED DRYER SECTION 5
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5.5 DEWPOINT CONTROLLED
VESSEL CHANGE OVER
(OPTION)
The vessel change over will be initiated by the PLC
control system when the timed adsorption phase for
the in process vessel has been completed and when
the dew point control senses the required moisture
level at the dryer outlet.
During “Dewpoint controlled” operation, “Time
controlled” operation may be selected at any time.
5.6 PANEL MOUNTED DATA
DISPLAY
This device is intended to provide the equipment
operators with basic information regarding the
operation of the equipment. A copy of the data
display program is included later in this manual and
shows the various information screens that are
provided.
At power up, the display will show the default screen
that provides access to “STATUS” or “CONTROL”
information. At any time, or from any screen, the
default screen can be reached by pressing the
“Menu” button.
From the default screen, dryer “STATUS” screens
can be reached by pressing up and down arrows
From the default screen.
Dryer is equipped with Auto and manual switch. On
auto switch the PLC will control the function of the
dryer and in manual mode customer can step the
process for trouble shooting . When steps are made
the switch has to be turned to Auto mode.
Dry air cooling switch is also provided for choosing
dry air cooling for better dew point or ambient air
cooling if dew point spike is not issue.
5.7 EQUIPMENT START UP
During transportation and/or storage of the
equipment it is possible that the desiccant has been
preloaded with atmospheric moisture. It is
recommended to fully regenerate both desiccant
beds prior to placing the dryer in service. Thus it is
necessary for the installation to be completed and
process air to be available.
Prior to starting the regeneration the complete
installation should be checked over to verify the
following points.
1. Are the connections to and from the system
inlet and outlet made? Are the correct size
and pressure rated connections used?
2. Is the correct electrical service connected to
the dryer with a suitably sized Disconnect
switch? With the power applied to the dryer it
is necessary to verify that the phase rotation
of the supply is correct. This is done by
“bumping” the blower motor starter and veri-
fying its direction of rotation.
3. Ensure that all instrumentation service
valves are in the open position and all vent
valves are in the closed position. All liquid
drain service valves are to be in the open
position.
4. With the system outlet valve and bypass
valves closed slowly open the dryer inlet
block valve to pressurize the system. Check
the complete dryer system for leaks at this
time. All leaks must be repaired and re
tested.
5. Verify that all instrument and pilot air tubing
fittings are tight and that the pilot air service
valve is open.
6. With the power on verify that the PLC is in
the “RUN” mode and after a few minutes the
regeneration process for vessels “1” and “2”
will begin. Observe all operations of these
first two cycles and verify the settings of tem-
perature, pressure and valve operations in
the PLC program.
At the completion of the start up procedure the dryer
system is ready to dry the process air. Slowly open
the system outlet valve to pressurize the downstream
system. Ensure the bypass valve is closed prior to
operating the dryer.
After start up and approximately one week of service
all process piping flanges and the bolting should be
checked for tightness. Thermal cycling may affect
some gaskets from the initial bolt torque pre-loading
and thus some bolting may need to be tightened.