Aircel ABP Series User manual

Front Page
Desiccant Air Dryers
ABP Series
Blower Purge
800 - 10,000 scfm
Installation
& Operations
Manual
Eective September 2017

ABP Series | Blower Purge Desiccant Air Dryer
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DRYER DATA SHEET
Model Number: Serial Number:
Dryer Type: Date of Manufacture:
Ship Date: Installation Date:
Customer Name:
Customer Address:
Customer City: State/Zip:
Accessories:
Other:

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DRYER DATA SHEET
Dryer Inlet Air Flow Rate:
Dryer Inlet Temperature:
Dryer Ambient Temperature:
Dryer Voltage:
Dryer MCA Minimum Circuit Ampacity:
Dryer MOP Maximum Overcurrent Protection:
Dryer Operating Pressure:
Dryer Maximum Operating Pressure:
Dryer Vessel Pressure Relief Valve Setting:
Dryer Desiccant Type:
Dryer Desiccant Weight Total for System:
Dryer Outlet Dew Point:
Dryer Control Time Cycle:
Dryer EMS Dew Point Sensor Setting (for sensor outlet dew point):
High Dew Point Setting:
Demand Cycle Setting:
Outlet Dew Point Readout on Display:
Electrical Drawing Number:
Mechanical Drawing Number:
PLC Software Program Number:
Control Air Filter Element Number:
Inlet Pre-Filter Element Number (option):
Outlet After-Filter Element Number (option):
Inlet Valve:
Purge Exhaust Valve:
Vessel National Board Number (Left and Right Vessels):
Dryer System Weight:

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TABLE OF CONTENTS
Dryer Data Sheet 2
Safety Precautions 5
Safety Symbols 6
General Safety Instructions 7
Desiccant Safety Precautions 8
Purpose and Intended Use 9
Inspection on Arrival 9
Design Parameters 10
Dryer Description 10
System Description 10
How It Works 10
Lifting Information 12
Installation Codes & Procedures 12
Installation Diagram 13
Installation 13
Component Operation 14
Adsorption 14
Regeneration 14
Vessel Changeover 15
Time Controlled 15
Dew Point Controlled 15
Preliminary Start-Up Checklist 16
Shut Down Procedures 17
Shut Down Emergency 17
Short-Term Shut Down 17
Long-Term Shut Down 17
Normal Operation Setup 18
Aircel Programmable Controller (APC) 19
Control Menu Screen 19
Running Screen 20
Dryer Operations 21
Alarm Banner & Alarm Log 29
Diagnostic & Flow Diagram 30
Entry & Service Screens 31
Service Screen 32
Proceed & Status Screen 33
Alarm Status 34
Heatless Mode 36
Service Information 37
Maintenance 37
Maintenance Log 38
Desiccant Replacement 38
Desiccant Unloading 39
Filter Element Change 39
Condensate Drain Maintenance 39
Butterfly Valve 39
Troubleshooting Table 40
Appendix 43
Desiccant Material Data Safety Sheet 43
Service Notes 48
Warranty 51

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Notice: For optimum performance, use only Aircel replacement parts.
Notice: For information and notes specific to custom designed and built dryers, reference the drawing package
provided with the unit. See warranty on manual back cover for custom engineered products.
NOTICE
Throughout this manual, signal words are present to advise of safety
precautions and/or standard practices. Obey these signal words as dened
below:
DANGER! - Indicates an imminently hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING! - Indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION! - Indicates a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.
Notice: used to address practices not related to personal injury.
WARNING!
GENERAL SAFETY PROCEDURES:
• Improper installation, operation, or maintenance may contribute to conditions in the work area or facility that could
result in personal injury and product or property damage. Check that all equipment is properly selected and sized for
the intended use.
• Consult and comply with national and local codes relating to fire or explosion and all other appropriate codes when
determining the location and operation of this equipment.
• Safe and efficient operation of the unit depends on proper installation.
• Authorities with jurisdiction should be consulted before installing to verify local codes and installation procedures. In
the absence of such codes, install unit according to the National Electric Code, NFPA No. 70-latest edition.
• A qualified installation and service agent must complete installation and service of this equipment.
• DO NOT weld on / to pressure vessel or modify it in any way.
• DO NOT remove, modify, or adjust protective or safety devices.
• Lock out power supply and depressurize system before performing maintenance or service work.
• DO NOT operate the equipment with the control panel door open.

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SAFETY INSTRUCTIONS
Safety Symbols Used in Manual
IMPORTANT INFORMATION: Readers of the manual must pay extra attention to instructions and information
succeeding this symbol.
WARNING: This indicates that it is dangerous and could result in physical injury and death if the instructions are
not followed correctly.
ELECTRICAL DANGER HIGH VOLTAGE: This means that there is a risk of electrical shock and only authorized
personnel with proper gear must approach it.
HIGH NOISE AREA: All personnel are required to wear ear protectors before approaching the vicinity of the
equipment.
HAZARDOUS FUMES & GASES: Personnel must wear protective gear to prevent inhaling of the gases and fumes.
SUSPENSION POINTS: Look for these symbols before making any attempt to move or relocate your equipment
.
TIPS & SUGGESTIONS: Following these tips can make your work easier.
EXTREME CAUTION: This indicates that there might be possible risk of material damage and personnel are
advised to exercise extra caution.
!
X

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GENERAL SAFETY INSTRUCTIONS
What You Must Do
1. Certified/authorized electricians must perform electrical work.
2. Electrical work must conform to the specifications indicated by Aircel and any local or state laws that may apply.
3. Personnel must wear appropriate safety gear before working on any electrical or mechanical aspects of the
machine.
4. Appropriate tools have to be used for all installation and maintenance work. If special tools are required and are
not available to the installation crew, contact the factory or your Aircel representative.
5. A copy of the Operation Manual must be made available to all personnel involved with the installation, operation,
and maintenance of the equipment.
6. Before performing any maintenance operations on the equipment, the unit must be shut down, isolated, electrical
power removed, and completely depressurized.
7. To ensure compatibility and continued trouble free operation, only genuine Aircel parts must be used.
Safe Operating Procedures
1. Pressurize and depressurize compressed air SLOWLY! Always open air valves slowly when pressurizing the airline
system or equipment. Repair air slowly when depressurizing your air system or equipment.
2. Circuit breakers, fusable disconnect, and wiring should conform to national and/or local electrical codes. Make
certain that qualified electrical personnel perform the electrical installation for this unit.
3. Only use original fuses for the rated voltage and current.
4. Shut down the unit in the correct recommended procedure.
5. Before any work on system, always depressurize the unit and remove all electrical power.
6. After shut down, put up warning notice to prevent the unit from being switched “ON” accidentally.
7. Inspect all piping, hoses, and connections. Make sure that all hoses are in good condition and are rated for the
correct working pressure. Do not allow hoses to come into contact with oils, chemicals, or sharp objects.
8. Secure condensate drain lines. Unsecured, flexible drain lines may whip violently under pressure and may cause
bodily harm.
Aircel air dryers do not remove carbon monoxide (CO) and are not safe for human respiration (breathing). Breathing air
must be at least Grade D quality as described in Compressed Air and Gas Association (CAGI) commodity specifications
67.1-1966. User may refer to OSHA 29 CFI 1910.134 for special precautions and equipment suitable for breathing air
applications. Aircel disclaims any liability whatsoever for loss, injury, or damage.
What You Must Not Do
1. Do not make any constructional changes to the unit. Only Aircel or its authorized representatives with the prior
approval can perform any constructional work on the machine.
2. Do not use foreign parts.
3. Compressed air from the dryers is not to be used for breathing purposes - install a breathing air package to
ensure conformance with OSHA regulations.
4. Do not disable or disengage any protective equipment used on the machine.
X
!
!

ABP Series | Blower Purge Desiccant Air Dryer
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DESICCANT SAFETY PRECAUTIONS
Desiccant First Aid
Recommendations
INHALATION
Use a contoured dust mask during loading and
unloading operations. If high concentrations are inhaled,
immediately move to fresh air. Keep person calm. If
not breathing, give articial respiration. If breathing is
dicult, give oxygen. Call a physician.
SKIN CONTACT
In case of contact, immediately flush skin with plenty of
soap and water for at least 15 minutes.
EYE CONTACT
In case of contact, immediately flush eyes with plenty of
water for at least 15 minutes. Call a physician.
SPILLS
Clean accidental spills by vacuuming, sweeping, or
flushing to a sewer treated for suspended solids. Avoid
creating excess dust.
WARNING!
INHALATION, SKIN, & EYE IRRITANT:
The desiccant used in this equipment is not considered
hazardous. Contact with and disposal of desiccant
must be in accordance with the relevant MSDS and
all local codes and regulations. The following lists the
more common safety measures to be observed during
loading and unloading operations. Reference the MSDS
in the appendix for complete safety measures.
!

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WARNING!
• Failure to lift the unit correctly can result
in sever personal injury or property
damage.
• Use appropriate lifting equipment and
adopt all safety precautions needed for
moving and handling the equipment.
• A hand cart, fork lift, or crane is
recommended for unloading and
installation.
• Lift unit by lifting lugs and frame only. Do
not lift by piping.
!
WARNING!
• Follow proper lock out/tag out
procedures before performing service or
maintenance work.
• Electrical installation must be performed
by a qualied electrician and comply with
all applicable national and local codes.
!
CAUTION!
• A copy of the Operation Manual must be
made available to all personnel involved
with the installation, operation, and
maintenance of the equipment, to avoid
injury to personnel or property damage.
• Appropriate tools must be used for all
installation and maintenance work, to
avoid injury to personnel or property
damage.
!
Purpose and Intended Use
Misuse or modication of this equipment may result in personal
injury. Do not misuse or modify. The high eciency heated
regenerative desiccant dryer is used exclusively for purifying
compressed air in non-hazardous locations.
The state-of-the-art system is designed and constructed
in accordance with the rules and regulations regarding
adsorption technology and industrial safety. There are hazards
accompanying this type of product if not operated for the
intended purpose by trained and specialized personnel.
Inspection on Arrival
All heated regenerative desiccant dryers are tested and
operated before shipment. However, shipping vibration may
cause damage such as loosening of certain parts. To ensure
smooth installation, it is recommended that immediately upon
receipt of the unit, the system is checked for the following:
1. Inspect unity on delivery.
2. Report any damage to the delivery carrier.
3. Request a written inspection report from the Claims
Inspector to substantiate the claim.
4. File claims with the delivery carrier.
5. Compare unit received with description of product ordered.
Check the serial plate label and make sure that it is the
correct Model was ordered. Note the equipment Capacity
and Power Supply requirements and ensure that they are
in accordance with your specifications. The rated conditions
of the dryer are indicated on the serial plate label. If there
is any discrepancy, contact your representative listed on
the manual back cover.
6. Vibration during shipping can loosen the connections.
Inspect all pipe and tubing and make sure they are all
tightened and secured.
7. Report incomplete shipments to the delivery carrier and
your service representative.

ABP Series | Blower Purge Desiccant Air Dryer
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System
The heated regenerative desiccant dryer is a continuous-
duty compressed air dryer used in industrial applications
to provide high drying eciency for large volume airows.
Continuous duty means no downtime. A switching valve
alternates the desiccant chambers between the drying and
regeneration phases. While one chamber is drying, the other
is regenerating.
The self-contained heated regenerative desiccant dryer
includes a control system, dryer, regeneration blower and
heater, and silencers.
The heated blower purge regenerative desiccant dryer
features high separation eciency desiccant to ensure
high water removal rates. Control system include the PLC
electronic controller and the energy management system.
Both oer consistent reliable control and tremendous energy
savings. The standard EMS (Energy Management System)
allows for either xed time or energy saving demand modes
of operation.
How It Works
1. Pre-ltered wet compressed air enters the bottom of the
on-line vessel.
2. Compressed air passes upward through the desiccant
bed; moisture is removed, lowering the dew point to
-40o F.
3. Dry compressed air exits the top of the vessel and ows
downstream to the after lter, monitored constantly via
standard dew point sensor. This EMS feature extends
the drying period until the target dew point occurs. This
greatly reducing energy costs.
4. Prior to regeneration, saturated on line vessel goes o-
line and depressurizes to ambient through an angle seat
valve & muer.
5. After the o-line vessel has depressurized, a blower
draws in ambient air for regeneration.
6. The air passes through an immersion heater, check
valve, and enters top of regenerating vessel.
DESIGN PARAMETERS
DRYER DESCRIPTION
Type of dryer: Desiccant
Power supply: 460 Volt / Three Phase / 60Hz
Desiccant type: Premium Grade Activated Alumina
All Models
Parameter
Description Air Pressure
Air Inlet
Temperature
Ambient
Temperature
Maximum 135 psig 120 (°F) 120 (°F)
Minimum 60 psig 40 (°F) 38 (°F)

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A
D
B
C
F
G E
Pre-Filter
Tower 1 Tower 2
Heater
EMS
After Filter
TYPICAL SCHEMATIC FLOW DIAGRAM
7. As the hot ambient air passes downward through the
desiccant bed, water molecules are released from the
surface of the desiccant.
8. Hot regeneration air passes through a buttery valve and
exhausts to atmosphere. Heating phase may terminate
early due to low load conditions; this energy savings is
automatically passed onto the customer and allows for
earlier cooling process to begin.
9. At the end of the heating phase of the cycle, the
desiccant bed, although regenerated, remains hot. The
temperature of the bed must be lowered to reduce
dew point and temperature spikes in the process air
when the bed goes back on-line. This is accomplished
by allowing a slipstream of dry process air, controlled
by an automatic valve, to ow from the on-line vessel
into the o-line vessel. This slipstream is also used to
re-pressurize the o line vessel after it has been cooled
placing the unit into standby. The EMS control continues
to save by extending the drying period through outlet
dew point monitoring until the target dew point is
reached.
10.Unique to the Aircel ABP is our parallel running period 10
minutes after vessel switchover. During this period, the
incoming ow of wet compressed air is directed through
both vessels. This step further reduces the dew point
and temperature spikes associated with heated dryers.
This parallel cooling mode requires no purge air.

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INSTALLATION
Lifting Information
Failure to life the unit correctly can result in severe personal
injury or property damage. Use appropriate lifting equipment
and adopt all safety precautions needed for moving and
handling the equipment.
A forklift or crane is recommended for unloading and
installation.
Lift unit by lifting lugs and frame only. Do not lift by piping.
1. Use all lifting points provided. Special care must be used
when lifting the dryer to prevent tip-over.
2. Use clevis connectors, not hooks, on lifting slings.
3. Only lift unit under support frame/base by using the fork
lifting lugs. Do not lift by piping.
4. Check the approximate weight provided on the
specification control drawing to ensure adequate crane or
lift truck capacity.
5. Allow only qualified operators to lift the equipment.
6. Refer to applicable OSHA regulations and local codes
when using cranes, forklifts, and other lifting equipment.
Installation Codes and Procedures
This product should be operated only from the type of power
source specied. If unsure of the type of power supply for
the desired outlet, consult a local power company. Failure to
comply may result in personal injury and/or property damage.
Follow proper lock out/tag out procedures before performing
service or maintenance work.
Electrical installation must be performed by a qualied
electrician and comply with all applicable national and local
codes.
1. Safe and efficient operation of the unit depends on
proper installation.
2. Authorities with jurisdiction should be consulted before
installing to verify local codes and installation procedures.
In the absence of such codes, install unit according to the
National Electric Code and NFPA No. 70-latest edition.
3. A qualified installation and service agent versed in all
regulatory codes must complete installation of this unit.
4. All shipping materials, including shipping covers, must be
removed from the unit prior to, or during unit installation.

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INSTALLATION, CONT.
Drain
Valve
Air or Water
Cooled
Condenser
Air
Compressor
Drain
Valve
Dry Air
to Plant
Drain
Valve
Drain
Valve
After Filter
Pre-Filter
Separator
Installation
1. Locate unit on a level foundation.
2. Install unit to provide adequate clearance for
maintenance services.
3. The frame must be securely bolted to the foundation
to prevent movement resulting from earth tremors and
induced piping vibration.
4. Install unit using the correct pipe size and pressure rating.
See drawing package provided with the unit.
5. Provide adequate power supply.
6. Do not place the dryer in service until both vessels
are fully regenerated, the operating cycle in the PLC
is verified, and the system is at the correct operating
pressure.
If proper system pressure cannot be maintained in the
adsorption vessel during drying, install a system back
pressure valve downstream of the dryer to protect
the dryer from high velocity resulting from low service
pressure. Failure to maintain the correct operating
pressure will cause elevated dew point and premature
failure of the desiccant.
7. The regeneration air outlet should be piped away from
all equipment and occupied spaces. The pressure loss
through the regeneration air outlet piping should not
exceed 2 inches of water column to prevent excessive
back pressure on the blower. If regeneration outlet line
is to be piped upwards, a manual drain valve must be
installed at the lowest point to drain any liquid water.
8. The relief valves can cause an unwanted condition or
hazard upon discharging. Pipe the outlets to a safe
location. The dryer relief valves are designed and sized
to relieve excess pressure resulting from the thermal
expansion of air trapped in the vessels in the event
that the vessels are subjected to heat, such as in a
conflagration. They are set to relieve at the maximum
design pressure of the desiccant vessels.
9. If there are any changes in the operating conditions of
the system from those published in this manual, contact
Technical Support for advice on necessary adjustments.
TYPICAL INSTALLATION DIAGRAM

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COMPONENT OPERATION
Adsorption
NOTICE: The heated regenerative desiccant dryer is not
designed to remove bulk liquid, therefore a cyclone separator
or a mist eliminator, not provided with the system, must
be installed to remove bulk-liquid condensate from the air
compressor’s aftercooler.
The bulk-liquid free compressed air from the customer-
supplied cyclone separator is delivered to the dryer through
a coalescing pre-filter located upstream of the dryer. The pre-
filter (optional with dryer) cleans by removing particles and
liquid mist down to a residual oil content of 0.03 ppm, based
on an inlet concentration of 3 ppm. The coalesced liquid is
removed from the pre-filter housing by the zero air-loss drain
valve.
The airflow continues through the inlet control butterfly
valve into the bottom of the on-line desiccant chamber. A
desiccant support and distribution screen at the chamber inlet
distributes the flow evenly throughout the desiccant bed. The
moist air flows upward through the desiccant bed where it is
dried. The dried air exits the desiccant chamber through the
upper flow distributor and retaining screen at the top of the
vessel. Before leaving the system to enter the compressed
air distribution system, the air is purified further by an after
filter (optional with dryer) that removes fine dust and abraded
desiccant.
Regeneration
While one desiccant chamber is on-line drying compressed air,
the other chamber is off-line and depressurized for desiccant
regeneration. The inlet valve to the off-line chamber closes
and the vessel depressurizes through an exhaust valve and
silencer to the atmosphere.
When the vessel low pressure switch indicates successful
depressurization, an atmospheric pressure blower is started
to provide regeneration air to the off-line desiccant bed. The
ambient regeneration air, heated to 400° F by an electric
resistance heater, is controlled by a manual valve installed at
the blower discharge or a slide gate damper at blower intake.
The heated air is directed downward through the off- line
wet desiccant bed and vented from the system through the
regeneration air outlet valve in the lower piping manifold.
When the desiccant bed is fully regenerated, 175 minutes
maximum heating time, the electric heater is turned off. The
blower is then turned off 6 minutes later, for heater cool-
down, and isolated by check valves.
The regeneration air heater outlet temperature is monitored
by a thermocouple and PLC control system. A thermocouple is
also installed in the regeneration air outlet manifold. If preset
temperature of 200°F is sensed at the regeneration air outlet
prior to the end of the maximum heating time, the heater will
be turned off early to save energy.
A heater sheath over-temperature switch is provided on each
heater circuit to protect the heater elements in the event of a
control fault or heating element failure.
After the desiccant is thermally regenerated, a portion of dry
outlet air, controlled by the manual purge flow adjusting valve,
is expanded to atmospheric pressure and passed through the
off-line vessel to cool the desiccant. The airflow direction is
downward through the off-line vessel during depressurization,
heating and cooling which prevents fluidization of the
desiccant and greatly reduces abrasion and attrition of the
desiccant granules. The cooling phase continues for 45
minutes (maximum) or until the temperature switch in the
lower manifold detects 120°F. The regeneration outlet valve is
closed and the vessel is re-pressurized with dry air. When full
line pressure is achieved in the regenerated vessel, which is
verified by pressure sensors, the inlet valve is opened and the
two chambers run in parallel mode for 10 minutes.
The two vessels are switched-over at the end of the drying
period. The regenerated bed is placed on-stream and
the water laden bed of desiccant is taken off-stream for
regeneration.
The manual purge flow adjusting valve must be set at start-
up to allow the dryer to re-pressurize in 4 minutes. This will
ensure that the correct purge flow is being used for cooling
and that full system pressure is achieved prior to change over.

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VESSEL CHANGEOVER
Time Controlled
The PLC control system initiates the changeover procedure
when the timed regeneration and re-pressurization phases for
the off-line chamber are complete.
With the standard EMS (Energy Management Control System),
the Time Controlled or Dew point Controlled drying mode can
be selected at any time during the cycle.
Dew Point Controlled
The standard EMS (Energy Management control System)
initiates the changeover procedure when the timed
regeneration, re-pressurization, and the dew point drying
extension phases for the off-line chamber are complete.
When the dryer is in the Dew point Controlled mode, the
effluent dew point is continuously monitored to determine
if the drying period can be extended or if vessel changeover
is required. If a high dew point is sensed at dryer outlet,
changeover at the end of the re-pressurization results; if a
low dew point is sensed at dryer outlet, dew point extension
drying results.
Dew point extension drying can occur for up to 6 hours on
the on-line desiccant chamber. During this extended drying
period, dew point at the dryer outlet is monitored and if
the high value is sensed, an immediate vessel changeover
occurs. If this value is not sensed, vessel changeover occurs
at the end of the 6 hour drying extension period.
At each vessel changeover, the chamber that was in service
is regenerated. Time Controlled operation can be selected at
any time while in the Dew point Controlled mode.

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PRELIMINARY START-UP CHECKLIST
During transport and storage of the equipment, the desiccant
can become pre-loaded with atmospheric moisture.
Regenerate both desiccant beds before placing the dryer
in service. Installation must be complete and process air
available to regenerate the desiccant beds.
1. Check that the inlet and outlet connections are the correct
size and pressure rating, and tightened securely.
2. Check that the correct power supply is connected to the
dryer with an adequate disconnect switch.
3. Check that all instrument service valves are OPEN and all
vent valves are CLOSED.
4. Check that all liquid drain service valves are OPEN.
5. With the customer-supplied compressed air to the system,
OPEN the inlet valve slowly to gradually pressurize the
system. Do not open valve too quickly. Opening valve and
suddenly pressurizing the system can cause damage to
the dryer, heat exchanger and other components.
6. Check the complete air system piping connections and
dryer system connections for leaks at this time. Repair
and retest all leaks.
7. Make certain control air pressure has pressure and is set
at 100 psi.
8. Verify that all instrumentation (pressure gauge[s] and
drain air tubing fittings) are tight.
9. With the electrical power ON, verify that the PLC is
operational after turning on the dryer power off/on
switch. After a few minutes, the regeneration process
for the right vessel will begin. Determine the rotation of
the blower motor by observing the shaft rotation at the
back end of the motor. Compare the rotation arrow on
blower housing or in the blower manual. If rotation is not
correct, turn the dryer off and turn the disconnect switch
off. Lock-out the electrical power to the unit. A qualified
electrician can then open the electrical enclosure and
exchange two of the three electrical leads on the motor
starter. The unit should then be restarted and the correct
rotation of the blower motor verified.
Observe the temperature of the regeneration air leaving
the electric heater. Adjust the blower discharge manual
valve or blower intake slide gate damper until the
outlet temperature is 400°F. If the system has a blower
discharge valve to ambient (typically used on the vortex
blowers on Aircel models 800-2500) the valve should
be initially closed for max flow. If the system can not
maintain 400°F. temperature for regeneration then
slightly open valve to ambient this will cause less flow
to heater causing temperature to rise make changes
gradually.
If the system has a blower intake slide gate damper
(typically used on the centrifugal blowers on Aircel models
3000 and up the valve should be initially open for max
flow). If the system can not maintain 400°F temperature
for regeneration then slightly close valve to cause less
flow to heater causing temperature to rise. Make changes
gradually.
During the re-pressurization operation, full line pressure
should be achieved in the freshly regenerated desiccant
vessel in 4 minutes to assure the design cooling purge
flow rate and complete pressurization in time for vessel
switch over. Incrementally open the purge control valve to
decrease the re-pressurization time. Close in on the valve
to increase the re-pressurization time.
To further reduce dew point and heat spike at switchover
the manual re-pressurization adjustment valve can be
adjusted open slightly more when the tower is in the res-
pressurizing mode to re-pressurize the tower within 1 to 1
1/2 minutes.
10. Observe all operations during one complete cycle on both
chambers and verify PLC and valve operations.
11. Slowly open the system outlet valve to pressurize the
downstream system to start drying air.
12. Make certain dew point sensor valves are adjusted
properly. The valve upstream of the dew point sensor
to be full open and the valve downstream of the sensor
should be just slightly cracked open so just a slight
amount of air is felt on the exhaust.
13. After start-up and approximately one month of service,
check that all piping flanges and bolts are tight.

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SHUT DOWN PROCEDURES
Emergency Shutdown
The dryer can be shut down under emergency conditions
under at any time by using the dryer power off/on switch or
by turning the main disconnect switch OFF.
Short-Term Shutdown
For planned shut down, the regeneration process should be
completed (heating and cooling) prior to stopping the dryer.
This ensures that a fully regenerated bed will be available
when the system is restarted. When the system is restarted,
dryer operation resumes at the same point in the cycle as
when it was shut down.
Long-Term Shutdown
1. Close the outlet valve to stop the process airflow.
2. Fully regenerate both vessels.
3. Leave the equipment depressurized with the system
inlet and outlet valves closed and power removed.
4. The complete start-up procedure must be followed
after a long-term shutdown.
5. Close both needle valves before and after the dew
point sensor.
WARNING!
• When the system is shutdown and power
removed, lock out power supply and
depressurize system before performing
maintenance or service work to avoid
injury to personnel or property damage.
• Regenerate both desiccant beds before
unit shutdown. When the system is
shutdown and power removed, open the
dryer bypass valve and close the inlet
valve to prevent the adsorption vessel
from moisture overload.
!

ABP Series | Blower Purge Desiccant Air Dryer
18
NORMAL OPERATION SETUP
Normal Dryer System Operation Setup
The following operational sequence should be followed for normal dryer system operation.
1. Make certain all gauge isolation valves, vent valves,
instrument valves, pre-filter drain valves, etc. are in the
correct positions.
2. Make certain the system has been pressurized to line
pressure.
3. Ensure blower intake adjustment valve has been preset
and locked down. Slight adjustment might be needed to
maintain 400°F downstream of heater during the heat
regeneration cycle.
4. Verify control air has pressure, set at 100 psi
5. Confirm the valve upstream of the dew point sensor is
fully open, and valve downstream of the dew point sensor
is slightly open - a slight air flow should be noticed at the
end of the exhaust coil.
6. The Power On/Off switch is set to ON.
7. The System On/Off button must be turned On. This is
accomplished by pressing the System On button on the
control panel in the Main Menu screen. The color will be
green for on and red for off.
8. Service Mode should not be active. Service Mode will not
be visible or shown on the Running Sequence screens
when not active. If Service Mode is shown, the service
routine is active and needs to be place into normal
operation. To deactivate Service Mode from the Running/
Step screens, press the Screen Unlock button until it starts
blinking, then press the Main Menu button, displaying
the Control/Main screen. Next, press the Service Menu
button to activate the service screen. From here, press
the Deactivate Service button. The Service Mode that was
visible on each screen will disappear and the dryer will
resume normal operation.
9. Check the temperature settings in the Control/Main
menu by pressing the Temp Settings button and verify all
settings are correct as needed.
10. Dew point Demand can be turned On or Off in the
Control/Main menu. When On (Green in color), Dew point
Demand is energy saving demand mode, extending the
drying period if below outlet Dew point Demand setting in
the Temp Settings screen. When the Dew point Demand
button is Off (Red in color), the dryer is in fixed time
mode, switching continuously on a standard time cycle.
11. Dry Cool Purge can be turned On or Off in the Control/
Main menu. When On (Green in color), a portion of the
dry air outlet will help cool the regenerating bed and
minimize the pressure dew point swing at switchover.
12. Blower Cool can be turned On or Off in the Control/
Main menu. When On (Green in color), the heater sheath
cooling process will initiate for a total of 8 minutes prior
to the Dry Cool Purge.
13. Typically, the Running Screens/Steps screens should be
displayed on the system screen when in operation. Other
screens (such as the Flow Diagram) can be displayed as
the normal operation screen, if needed.
14. Verify no Common Shutdown alarms are active and
require attention.
15. Make certain any filter, dryer, or user block and bypass
valves are in the correct positions.
16. The system is ready to go on line and dry the process air.
Normal Settings
Heat Control 400
Dew point Demand - 50
High Humidity - 10

Blower Purge Desiccant Air Dryer | ABP Series
19
AIRCEL PROGRAMMABLE CONTROLLER (APC)
Control Menu Screen
The control menu allows the user some control over system operation, as well as the ability to navigate to the other status and
alarm screens. Red buttons indicate off while green buttons indicate on and yellow buttons indicate status screens.
Toggle Blower Cool
On/Off
Navigate to flow
diagram
Navigate to service
menu
Heatless Mode
Indicator (note: not
visible in normal operation,
only in heatless mode)
Navigate to Dryer
Status Screen
Navigate to
Alarm Status
Screen
Navigate to
Alarm Log Screen
Navigate to
temperature
settings screen
Dry Cool Purge
Air On/Off
System On/Off
Dew Point
Demand On/Off
Navigate to
Normal Running
Screens
Service Mode
Indicator (note:
not visible in normal
operation, only in
service mode)
Dry Cool Purge Air On/Off: Button toggles dry cool purge on/
off. Green ON is dry air purge from system outlet for system
cooling. Red OFF is blower only cooling, which will give a high
dew point on switchover.
System On/Off: Button toggles system on/off. Green ON is
system running. Red OFF is system not running.
Dew Point Demand On/Off: Button toggles energy saving
mode on/off. Green ON enables energy saving mode. Red OFF
disables energy saving mode, enables fixed time cycle mode -
system cycles on a continuous cycle.
Blower Cool On/Off: Button toggles blower cool on/off.
Green ON draws in atmospheric pressure through the blower
in order to cool the heater sheath. Red OFF will turn both the
Dry Air Cooling and Blower Cool off. WARNING: The unit will
not cool properly when turned off!
Running Screens: Navigate to the normal running screens
Dryer Status: Navigates to dryer status screen
Flow Diagram: Navigates to the flow diagram screen
Service Menu: Navigates to the service menu screen
Alarm Status: Navigates to the alarm status screen
Alarm Log: Navigates to the alarm log screen
Temp Settings: Navigates to the temperature settings screen
NOTES:

ABP Series | Blower Purge Desiccant Air Dryer
20
AIRCEL PROGRAMMABLE CONTROLLER (APC)
Running Screen
The Steps screen allows the user to view the process of the system operation, as well as the ability to navigate to the other
status and alarm screens. Red buttons indicate off while green buttons indicate on and yellow buttons indicate status screens.
Step Time
Vessel Pressures
Navigate to Main
Menu
Note: Screen button
must be in Unlock
position before
pressing Main Menu
button
Outlet Dew point
Read Out
Screen Lock/
Unlock
Locks or Unlocks the
running screens
Note: Screen must
be in Lock for
normal operation.
While in Service
Mode, blinking
Screen Unlock is
only to be used to
return to Main Menu
Service Mode / Heatless Mode Indicator Note: Not visible in normal operation; only
visible in Service or Heatless modes
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