Beko Drypoint ACC 4 User manual

EN
Instruction & Technical Manual
4 - 35
BEKO TECHNOLOGIES CORP. 900 Great SW Parkway, Atlanta, Georgia 30336, USA
[phone] Phone [phone] Fax [email protected] www.bekousa.com

The product to which this manual refers must not be supplied, installed,
used, operated or serviced until the contents of the manual has been
fully read and understood by all relevant personnel.
Please complete the following information at the time of installation
found on the rating label on the upper right hand side of dryer
Model Number
Serial Number
Regulated Inlet Pressure
Filtration present with Dryer
Outlet Flow of Dryer
Compressor Outlet Flow
Supply Voltage
When contacting the manufacturer regarding this product, please have
the above stated information at hand to speed up your query.

1Safety 4
Safety Guidelines 4
Symbols 5
2General Description 6
Function of the Dryer 6
Package Contents 7
3Mechanical Installation 9
4Electrical Installation 15
5Operation 18
Start-Up 18
Shut Down 19
6Maintenance 25
Servicing 25
Purge Plug 28
Exhaust 29
Replacing Shuttle Valves 31
7Energy Management 32
8Troubleshooting 38
9Technical Data 42
10 Component Parts 44
11 Spares Information 47
12 Warranty 49
Contents

4Heatless Desiccant Dryers |Instruction Manual
The following safety guidelines must be
strictly observed.
• Leave this manual at the place of installation of
the product.
• It is essential that only the manufacturer or its appointed
agents carry out maintenance and servicing work.
Users, maintenance and servicing personnel must be familiar
with:
• Accident prevention regulations.
• Safety information (general and specic to the unit).
• Safety devices of the unit.
• Measures to be taken in case of an emergency.
• Allow only suitably trained persons to be involved with
installation, start-up, operation, servicing and maintenance
of the product.
• It is the responsibility of the installer to ensure that the
pipe work to and from the dryer is suitable, in accordance
with applicable legislation and subject to inspection and
testing prior to being put into service. All piping must be
adequately supported.
• Before carrying out any maintenance or servicing work the
unit must be taken out of operation. Users and others will
be exposed to risk if work is carried out while the unit is
running. This means electrical disconnection plus isolation
from the compressed air supply and full depressurization.
• Only trained and competent persons familiar with the
electrical requirements of the unit as laid out in this
manual and electrical safety rules and regulations should
be allowed to carry out work on the electrical components
and power supply to the unit.
• When carrying out any work on the unit, use only
correctly sized appropriate tools in good condition.
• Only use original spare parts and accessories from the
manufacturer. There is no guarantee that non-original
parts have been designed and manufactured to meet
the safety and operational requirements of the unit. The
manufacturer assumes no liability for any equipment
malfunction resulting from the use of non-approved parts.
Safety
• If carrying out installation work above head height, use
suitable and safe working platforms or other means of
working access.
• Do not make any constructional changes to the product.
Any changes or modications may only be carried out by
the manufacturer.
• Any faults or defects that could affect safety must be put
right fully before using the unit.
• Used items and materials must be disposed of in the
correct manner, complying with local laws and regulations,
in particular the desiccant cartridge.
Section 1: Safety

5
Heatless Desiccant Dryers | Instruction Manual
Risk of Danger
Risk of High Pressure
Equipment Protected by
Double Insulation
Risk of Electric Shock
Warning
Important Note
Section 1: Safety
Figure 1.1: Denition of symbols
Manual Handling
As with all areas of the workplace, Health and Safety is of
great importance and must be given due care and attention.
While working with this equipment, manual handling
regulations must be considered and adhered to.
Full advice, support and guidance should be detailed in your
Health and Safety Policy and Manual Handling guide, please
take the time to familiarize yourself with these documents.
The Manual Handling Operations Regulations apply to a wide
range of manual handling activities, including lifting, lowering,
pushing, pulling or carrying.
We ask every person handling this product to take the
responsibility for their own Health and Safety and the Health
and Safety of others around them. If you feel there is a
signicant risk, you must take steps to either remove the risk
altogether, or reduce the risk prior to carrying out the activity.
If you need further support or guidance with this, please
consult your line manager or the HR Department.
There are safe systems of work and correct procedures in
relation to manual handling, please consult these documents
available within the workplace.
We ask everyone handling this product to:
• Follow appropriate systems of work laid down
for their safety.
• Make proper use of any equipment provided for
their safety.
• Inform the company if they identify hazardous
handling activities.
• Take care to ensure that their activities do not put
others at risk.
If in doubt, please seek further advice and ensure you always
follow the correct procedures and guidance.
For more information please see our Health and Safety
manual attached.
When used in the UK, a 3 amp fuse should be tted as per the
wiring diagram (gure 4.4).

6Heatless Desiccant Dryers |Instruction Manual
Function of the Dryer
The dryer is designed to provide a smooth, controlled and
uninterrupted delivery of dry compressed air. Wet air passes
through a pre-lter and travels down to the bottom valve
assembly. The air is then fed through the bottom of the
desiccant bed and moves through the high performance
desiccant until it becomes dry. On exit from the desiccant
cartridge, the air is passed through the outlet valve assembly.
During this process, the dryer control system cycles the process
air between the two desiccant towers. While one chamber is
on stream removing water vapor, the other is being carefully
depressurized in preparation for regeneration. The desiccant
bed is regenerated by expanding a small amount of dry
process air, or purge air, through the saturated desiccant.
Purge air passes to atmosphere through the silencer, which is
tted to an exhaust valve. The chamber is then repressurized,
with the control system assuring each chamber is at full
operational pressure prior to changeover.
This ensures a reliable and efcient operation. The air stream is
switched and the cycle repeats on a continuous basis.
General Description
Section 2: General Description
This manual is valid for the following dryer models
ACC 4 ACC 6 ACC 8
ACC 10 ACC 15 ACC 25
ACC 35

7
Heatless Desiccant Dryers | Instruction Manual
Package Contents
The dryer is delivered in protective packaging. Take care when transporting, loading and unloading the unit.
The package contains the following items (refer to gure 2.1):
Figure 2.1: Package contents
INSTRUCTION MANUAL
TUBING
CLEARPOINT FILTER
DIN PLUG
BEKOMAT (OPTIONAL)
M & M UNION
CERTIFICATE OF CONFORMITY
CONNECTION KIT (OPTIONAL)
041705 001 01 Ra
6789
6789
6789
6789
6789
6
789
678
9
6
7
89
67
8
9
DRYPOINT ACC DRYER
Section 2: General Description

8Heatless Desiccant Dryers |Instruction Manual
Figure 2.2: Models 4 SCFM – 35 SCFM
Section 2: General Description
13
12
5
11
15
16
9
10
1
21
14
22
20
8
3
67
5
4
19
18
17
2
1. Top valve assembly
2. Control unit
3. Bottom valve assembly
4. Dryer base
5. Bottom valve xing bolt
6. Front panel
7. Front panel xing screw
8. Pressure housing
9. Pressure housing retaining bolt
10. Desiccant cartridge (comes with dust lter)
11. Multiport manifold
12. Top cover
13. Top cover xing screw
14. Rear panel
15. Banjo xing bolt
16. Pressure seal
17. Exhaust silencer
18. Purge plug
19. Purge plug xing screw
20. Pre-lter
21. Power cord
22. Down tube

9
Heatless Desiccant Dryers | Instruction Manual
Connecting the pre-lter to the dryer
• 4 SCFM – 35 SCFM, Utilize O-ring and bolts supplied to
assemble lter as per gure 3.1.
• Fit 5/32” (4mm) tubing to lter and dryer’s built-in drain
valve inlet.
• Pipe away condensate with 5/32” (4mm) tubing from the
dryer’s drain outlet. Ensure condensate is drained into an
oil/water separator.
• Fit any further ltration or ancillary equipment.
• Drain kits supplied with dryer and comprise of the
following: Swivel elbow adapter and 5/32” (4mm) tubing.
It is recommended that a bypass line including lter is
installed, as per gure 3.13
17. Exhaust silencer
18. Purge plug
19. Purge plug xing screw
20. Pre-lter
21. Power cord
22. Down tube
1
2
Figure 3.1: Connecting pre-lter
Mechanical Installation
Section 3: Mechanical Installation
1. Inlet
2. Outlet
Figure 3.2: Connecting lter drain
All tubing should be secured up to the point of drain to
prevent whipping during discharge.

10 Heatless Desiccant Dryers |Instruction Manual
Orientation
The dryers are designed to operate in both vertical and
horizontal orientation.
Figure 3.3: Horizontal orientation
Figure 3.4: Vertical orientation
Section 3: Mechanical Installation

11
Heatless Desiccant Dryers | Instruction Manual
Figure 3.6: Reconguration of inlet/outlet ports
Figure 3.5: Inlet/outlet ports
Reconguration of the inlet / outlet ports
4 SCFM – 35 SCFM models
The dryer provides a choice of 3 inlet ports (A, B & C) and 3
outlet ports (D, E & F). Any inlet or outlet port may be used.
Make sure the remaining two inlet or outlet ports are blanked
off using provided pressure plugs. (Figure 3.5)
If desired, the port block may be removed and rotated 180° to
provide additional inlet & outlet port positions. (Figure 3.6)
A
B
C
D
E
F
Section 3: Mechanical Installation
Tools required
• 4mm hex key
• 5mm hex key
Directional arrows are etched into the inlet manifold.
Any / all of the three outlet ports can be used on
occasion. Please ensure combined ow at outlet should
not exceed specication. Please adhere to regional
regulations.
It is strongly advised to connect a non-return valve to
each outlet used.
Only use one inlet port at any one time
Ensure original seals are in place.
Check dryer is leak-free prior to operation.
11
3
4
6
7
8
3
E
D
F
A
B
C
7
8
4
6
11
A
B
C
D
E
F
D
EF
A
B
C

12 Heatless Desiccant Dryers |Instruction Manual
Section 3: Mechanical Installation
13
13
Figure 3.7: Level ground
13
13
Figure 3.8: Drainage (all tubing should be secured up to the point of drain to prevent whipping during discharge)

13
Heatless Desiccant Dryers | Instruction Manual
Max 122OF
(50OC)
>Max 122OF
(50OC)
Max 122OF
(50OC)
>Max 122OF
(50OC)
Max 122OF
(50OC)
>Max 122OF
(50OC)
Figure 3.10: Hard piped installation
Max 122OF
(50OC)
>Max 122OF
(50OC)
Figure 3.11: Exposure to heat
Max 122OF
(50OC)
>Max 122OF
(50OC)
Max 122OF
(50OC)
>Max 122OF
(50OC)
Figure 3.9: Location
Section 3: Mechanical Installation

14 Heatless Desiccant Dryers |Instruction Manual
Section 3: Mechanical Installation
A B
C D
Figure 3.13: Typical installation
Figure 3.12: Direction of ow
To prevent back ow into the dryer a non-return valve should be placed
in-line, downstream of the dryer. This is essential when more than one dryer
is used in a single application.

15
Heatless Desiccant Dryers | Instruction Manual
Section 4: Electrical Installation
Electrical Installation
Connection
The dryer is designed to operate on either AC or DC supply
voltage.
Electrical wiring must comply with local regulations. Voltage
requirements must be conrmed to be within the specication
on the dryers rating plate.
Ensure only one power source is connected at any one time
and is connected to the correct socket as shown in gure 4.3
and 4.4.
The dryer controller is double insulated therefore no earth
is required on the power connector. External fuse to be
connected to plug.
The cable selection must suit local installation regulations and
be appropriate to power consumption as shown in the Power
Supply table.
Power Supply
Supply Amp
12 VDC 0.80
24 VDC 0.40
100 VAC 0.16
115 VAC 0.14
230 VAC 0.07
240 VAC 0.07
How to wire a power connector
Figure 4.1 illustrates how to wire power connector. Please
refer to wiring diagram, gure 4.2, page 16, for further
information.
Remove screw & pry
to remove insert
Gasket
Insert
Figure 4.1: Din connector

16 Heatless Desiccant Dryers |Instruction Manual
Section 4: Electrical Installation
Different voltage setting
Blanking Cap
DIN Connector
Gasket
(Attached to Power
cord from factory)
Blanking Cap
DIN Connector
Gasket
(Customer must remove from supplied
power cord and supply appropriate
power cable)
Figure 4.3: 100 to 240 VAC
2
3
N or L2 (100 - 240 VAC)
Not used
Not used
Not used
N.O.
N.O.
Not used
Not used
Not used
Not used
Not used
Not used
Earth
1
PININPUT
OUTPUT
V.F.* OUTPUT
L1 (100 - 240 VAC)
2
3
1
PIN
3-5 VDC (+)
2
3
* Volt Free
1
PIN
12-24VDC
INPUT
INPUT
12
3
1
2
3
1
2
3
AC POWER SUPPLY (Open Connection From Factory)
2
3
24VDC (-)
Not used
Earth
1
PININPUT
24VDC (+)
1
2
3
DC POWER SUPPLY (Blanked off From Factory)
ENERGY MANAGEMENT
ALARM
Drain
Solenoid Valve
Right Tower
Solenoid Valve
Controller
Rear
Controller
Front
Left Tower
Solenoid Valve
Figure 4.2: Wiring diagram
Blanking Cap
DIN Connector
Gasket
(Attached to Power
cord from factory)
Blanking Cap
DIN Connector
Gasket
(Customer must remove from supplied
power cord and supply appropriate
power cable)
Figure 4.4: 12 to 24 VDC

17
Heatless Desiccant Dryers | Instruction Manual
Section 4: Electrical Installation
Controller Description
Controller Specication
Ambient temperature 35°F to 122°F (1.5°C to 50°C)
Max. relative humidity 80% up to 87.8°F, decreasing linearly to 50% RH at 122°F
Input voltage range 100–240VAC, 50–60Hz, 12–24VDC
Mains supply voltage not to exceed ±10% of nominal
Protection class IP65
Transient over voltage IEC 60664 Class II
Pollution degree 2, IEC 60664
A circuit breaker or switch must be installed near the
dryer. This should be easy to reach and shall be certied
according to EN60947-1 and EN60947-3. The switch
or circuit breaker shall be marked as the disconnecting
device for the dryer and needs to be marked with on and
off positions.
Output connections do not provide isolation from the
mains connectors and interconnecting wiring must meet
EN61010-1:2001 requirements for reinforced insulation.
For energy and alarm installation management please see
section 8

18 Heatless Desiccant Dryers |Instruction Manual
Section 5: Operation
Operation
Background / Function of the dryer
The dryer operation is designed to give smooth, uninterrupted
delivery of compressed air to the designated specication.
During the cycle of operation, the rst pressure housing is
fully pressurized and airow is directed upwards through the
desiccant cartridge, removing moisture from the air during its
passage, to the minimum specied dewpoint.
During the drying cycle, a small bleed of process air is directed
to the opposite pressure housing. This process air ows down
through the desiccant cartridge and into the atmosphere by
means of an exhaust silencer, thereby affecting regeneration
of the desiccant.
After 120 seconds of operation, the cartridge under
regeneration is sealed by closing of the exhaust valve and the
pressure housing is brought up to full system pressure by the
purge air.
After an extended time (See start-up procedure for individual
sizes) the pressure in the rst housing is released into the
atmosphere by means of the corresponding exhaust valve and
the desiccant cartridge then operates in regeneration mode.
The main air ow and drying function is then transferred
to the desiccant cartridge that was previously under
regeneration.
The cycle of operation continues in this pattern with
the cartridges switching alternately between drying and
regenerating.
Start-up procedure 4 SCFM - 35 SCFM
• See gure 5.1 and 5.2.
• Close valves A, B, C and D.
• Switch on compressor.
• Open valve A slowly.
• Check there are no leaks from the dryer.
• Switch on electric power. All four display panel LED’s will
ash simultaneously green four times then simultaneously
red four times to acknowledge application of power
and readiness to function. Observe display panel for one
complete cycle. Note: cycle described is factory setting.
a. Power LED illuminates green and tower LED X illuminates
green.
a. After 120 seconds, tower LED X switches off and drain
LED Z illuminates green.
b. After a further 50 seconds drain LED Z switches off and
tower LED Y illuminates green.
c. After a further 120 seconds, tower LED Y switches off.
d. After a further 50 seconds, tower LED X illuminates green
- this is point ‘a’ in the cycle described above.
The above cycle (a – e) repeats.
On initial commissioning only run the dryer for a minimum
of 6 hours to ensure dewpoint is adequate. Thereafter,
continue directly to next point.
Open valve B slowly.
b.
c.
d.
e.

19
Heatless Desiccant Dryers | Instruction Manual
Section 5: Operation
Figure 5.2: Controller description
Z
Y
X
POWER
X Left tower regenerating (Right tower drying)
Y Right tower regenerating (Left tower drying)
Z Drain solenoid
Power Power connected to controller
Shut-down Procedure
• Close valve B.
• Close valve A.
• Leave dryer running for 15 minutes to fully depressurize.
• Switch off all electrical power to the dryer.
Under no circumstances must compressed air be
allowed to ow through the dryer following switch off
of electrical power. This will result in terminal failure of
the desiccant cartridges and regeneration will not be
possible.
When Illuminated
Figure 5.1: Typical installation
A B
C D

20 Heatless Desiccant Dryers |Instruction Manual
Section 5: Operation
Figure 5.3: Initial Pressurization (Power Off)
With power off to the dryer, both towers pressurize to line pressure. The N.C., 2/2 solenoid valves are both de-energized. Air pressure on the outside of the diaphragm
increases as air flows through the tiny bleed hole in the diaphragm. The air pressure on the outside of the diaphragm quickly equalizes with the internal air pressure of
the dryer allowing the small spring on the outside of the diaphragm to press the diaphragm against its seat, keeping air from exiting the silencer.
Note: Any air flowing through the dryer, passes through both towers.
Figure 5.3: Initial Pressurization (Power O )
1.0 µ
Pre-Filter
Water
Separator
Right
S.V.
Left
S.V.
0.01 µ
After Filter
To Bottom Valve
Alternate Inlet Alternate Outlet
TIMING CHART:
ON
OFF
ON
Wet
Purge
Dry
OFF
SV 2
(Right Solenoid Control Valve)
LEGEND:
SV 1
(Left Solenoid Control Valve)
ON
OFF
DV 1
(Prefilter Drain Solenoid Valve)
Seconds: 0 120 170 290 340
2 Seconds
IN OUT