Beko DRYPOINT RAX 125 NA-E-OB Series User guide

1
EN - english
Instructions for installation and operation
Compressed air refrigeration dryer
DRYPOINT®RAX 20-500 NA 1ph UL

2 DRYPOINT® RAX 20-500 NA 1ph UL
Dear customer,
Thank you for deciding in favour of the DRYPOINT®RAX 20-500 NA UL compressed-air refrigeration dryer. Please read
these installation and operating instructions carefully before mounting and starting up the DRYPOINT®RAX 20-500 NA
UL and follow our directions. Perfect functioning of the DRYPOINT®RAX 20-500 NA UL and thus reliable compressed-
air drying can only be guaranteed when the provisions and notes stipulated here are strictly adhered to.

DRYPOINT® RAX 20-500 NA 1ph UL 3
Contents
1Name plate 5
2Safety instructions 5
2.1 Safety pictograms in accordance with DIN 4844 6
2.2 Signal words in accordance with ANSI 8
2.3 Overview of the safety instructions 8
3Proper use 11
4Exclusion from a field of application 11
5Operating instructions in accordance with the 97/23/EC Pressure Equipment Directive 12
6Transport 12
7Storage 12
8Installation 13
8.1 Place of installation 13
8.2 Installation plan 14
8.3 Correction factors 15
8.4 Connection to the compressed-air system 16
8.5 Electrical connections 17
8.6 Condensate drain 17
9Start-up 18
9.1 Preliminary stages 18
9.2 Initial start-up 18
9.3 Shut down and restart 19
10 Technical data 20
10.1 Technical data DRYPOINT RAX 20-200 NA -P (1/115/60) 20
10.2 Technical data DRYPOINT RAX 125-500 NA -E (1/230/60) 21
11 Technical description 22
11.1 Control panel 22
11.2 Functional description 22
11.3 Flow chart 23
11.4 Refrigerating compressor 24
11.5 Condenser 24
11.6 Filter dryer 24
11.7 Capillary tube 24
11.8 Aluminium heat exchanger 24
11.9 Hot-gas bypass valve 24
11.10 Refrigerant pressure switches LPS –HPS –PV 25
11.11 Safety temperature switch TS 25
11.12 DMC 18 electronics (control unit compressed-air dryer) 26
11.12.1 Switching the dryer on 26
11.12.2 Switching the dryer off 26
11.12.3 Indication of the operating parameters 26
11.12.4 Indication of a service warning/service alarm 26
11.12.5 Operation of the potential-free failure/alarm contact 27
11.12.6 How to change operating parameters –SETUP menu 27
11.12.7 Selection of the BEKOMAT drain model 27
11.13 Electronically level-controlled BEKOMAT condensate drain 28
12 Maintenance, troubleshooting, spare parts and dismantling 28
12.1 Checks and maintenance 28
12.2 Troubleshooting 30
12.3 Recommended spare parts 35

4 DRYPOINT® RAX 20-500 NA 1ph UL
12.4 Maintenance works at the refrigeration cycle 36
12.5 Dismantling the dryer 36
13 Appendices 37
13.1 Dryer dimensions 37
13.1.1 Dryer dimensions DRYPOINT RAX 20-50 NA 37
13.1.2 Dryer dimensions DRYPOINT RAX 75 NA 38
13.1.3 Dryer dimensions DRYPOINT RAX 100-150 NA 39
13.1.4 Dryer dimensions DRYPOINT RAX 200-250 NA 40
13.1.5 Dryer dimensions DRYPOINT RAX 300-350 NA 41
13.1.6 Dryer dimensions DRYPOINT RAX 400-500 NA 42
13.2 Exploded diagrams 43
13.2.1 Components of the exploded diagrams 43
13.2.2 Exploded diagram DRYPOINT RAX 20-30 NA 44
13.2.3 Exploded diagram DRYPOINT RAX 50 NA 44
13.2.4 Exploded diagram DRYPOINT RAX 75 NA 46
13.2.5 Exploded diagram DRYPOINT RAX 100 NA 47
13.2.6 Exploded diagram DRYPOINT RAX 125-150 NA 48
13.2.7 Exploded diagram DRYPOINT RAX 200-250 NA 49
13.2.8 Exploded diagram DRYPOINT RAX 300-350 NA 50
13.2.9 Exploded diagram DRYPOINT RAX 400-500 NA 51
13.3 Electric diagrams 52
13.3.1 Electric diagrams –list of components 52
13.3.2 Electric diagram DRYPOINT RAX 20-100 NA 53
13.3.3 Electric diagram DRYPOINT RAX 125-250 NA 54
13.3.4 Electric diagram DRYPOINT RAX 300-350 NA 55
13.3.5 Electric diagram DRYPOINT RAX 400-500 NA 56
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5
1 Name plate
The name plate is on the back of the dryer and comprises all primary data of the device. Always refer to these when
contacting the manufacturer or the sales department.
All guarantee claims will expire in the event that the name plate is modified or removed.
2 Safety instructions
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Please check whether or not these instructions correspond to the device type.
Please adhere to all advice given in these operating instructions. They include essential information which
must be observed during installation, operation and maintenance. Therefore, it must be ensured that these
operating instructions are read by the fitter and the responsible operator / certified skilled personnel prior
to installation, start-up and maintenance.
The operating instructions must be accessible at all times at the place of application of the DRYPOINT®
RAX 20-500 NA UL compressed-air refrigeration dryer.
In addition to these operating instructions, local and national regulations need to be observed, where
required.
Ensure that operation of the DRYPOINT®RAX 20-500 NA UL compressed-air refrigeration dryer only takes
place within the permissible limit values indicated on the name plate. Any deviation from these limit values
involves a risk for persons and for the material, and may result in malfunction or a breakdown.
After installing the device correctly and in accordance with the instructions in this manual, the dryer is ready
to operate, further settings are not required. Operation is fully automatic and maintenance is limited to
several examinations and cleaning measures which are described in the following chapters.
This manual must be available at all times for future reference and is a constituent part of the dryer.
If you have any queries regarding these installation and operating instructions, please contact BEKO
TECHNOLOGIES GMBH.

Safety instructions
6 DRYPOINT® RAX 20-500 NA 1ph UL
2.1 Safety pictograms in accordance with DIN 4844
Observe operating instructions
General danger symbol
Supply voltage
Danger: component or system under pressure
Hot surfaces
Non-breathable air
Do not use water to extinguish the fire
Do not operate with open cover (housing)
Maintenance works or controlling measures must only be carried out by qualified personnel1
Do not smoke
Note
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6
Connection point compressed-air inlet
Connection point compressed-air outlet
Connection point condensate drain
Works can be carried out by the operator of the plant, provided that they are skilled accordingly2.
1
Certified skilled personnel arepersons who are authorised by the manufacturer, with experience and technical training, who are well-
grounded in the respective provisions and laws and capable of carrying out the required works and of identifying and avoiding any
risks during the machine transport, installation, operation and maintenance.
Qualified and authorised operators are persons who are instructed by the manufacturer regarding the handling of the refrigeration
system, with experience and technical training, and who are well-grounded in the respective provisions and laws.
2
Certified skilled personnel arepersons who are authorised by the manufacturer, with experience and technical training, who are well-
grounded in the respective provisions and laws and capable of carrying out the required works and of identifying and avoiding any
risks during the machine transport, installation, operation and maintenance.
Qualified and authorised operators are persons who are instructed by the manufacturer regarding the handling of the refrigeration
system, with experience and technical training, and who are well-grounded in the respective provisions and laws.
ARIA
AIR
LUFT
AIR
ARIA
AIR
LUFT
AIR

Safety instructions
DRYPOINT® RAX 20-500 NA 1ph UL 7
NOTE: Text that contains important specifications to be considered –does not refer to safety precautions.
The device was carefully designed with particular attention paid to environmental protection:
•CFC-free refrigerants
•CFC-free insulation material
•Energy-saving design
•Limited acoustic emissions
•Dryer and packaging comprise reusable materials
This symbol advises the user to observe the environmental aspects and comply with the recommendations
connected with this symbol.

Safety instructions
8 DRYPOINT® RAX 20-500 NA 1ph UL
2.2 Signal words in accordance with ANSI
Danger!
Imminent hazard
Consequences of non-observance: serious injury or death
Warning!
Potential hazard
Consequences of non-observance: possible serious injury or death
Caution!
Imminent hazard
Consequences of non-observance: possible injury or property damage
Notice!
Potential hazard
Consequences of non-observance: possible injury or property damage
Important!
Additional advice, info, hints
Consequences of non-observance: disadvantages during operation and maintenance, no danger
2.3 Overview of the safety instructions
Certified skilled personnel
Installation works must exclusively be carried out by authorised and qualified skilled personnel. Prior to
undertaking any measures on the DRYPOINT®RAX 20-500 NA UL compressed-air refrigeration dryer,
the certified skilled personnel shall read up on the device by carefully studying the operating instructions.
The operator is responsible for the adherence to these provisions. The respective directives in force apply
to the qualification and expertise of the certified skilled personnel.
For safe operation, the device must only be installed and operated in accordance with the indications in
the operating instructions. In addition, the national and operational statutory provisions and safety
regulations, as well as the accident prevention regulations required for the respective case of application,
need to be observed during employment. This applies accordingly when accessories are used.
Danger!
Compressed air!
Risk of serious injury or death through contact with quickly or suddenly escaping compressed air
or through bursting and/or unsecured plant components.
Compressed air is a highly dangerous energy source.
Never work on the dryer when the system is under pressure.
Never direct the compressed-air outlet or condensate drain hoses at persons.
The user is responsible for the proper installation of the dryer. Non-observance of the instructions in the
"Installation" chapter leads to the expiration of the guarantee. Improper installation may result in
dangerous situations for the personnel and/or the device.
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Danger!
Supply voltage!
Contact with non-insulated parts carrying supply voltage involves the risk of an electric shock
resulting in injuries and death.
Only qualified and skilled personnel are authorised to run electrically-operated devices. Prior to
undertaking maintenance measures at the device, the following requirements must be met:
Make sure that the power supply is switched off and that the device is off and marked for maintenance
measures. Please also ensure that the power supply cannot be re-established during the works.
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Caution!
Refrigerant!
The compressed-air refrigeration dryer uses HFC-containing refrigerants as a coolant.
Please observe the corresponding paragraph entitled "Maintenance works at the refrigeration cycle".
Warning!
Refrigerant leak!
A refrigerant leak involves the danger of serious injury and damage to the environment.

Safety instructions
DRYPOINT® RAX 20-500 NA 1ph UL 9
The DRYPOINT®RAX 20-500 NA UL compressed-air refrigeration dryer contains fluorinated greenhouse
gas/refrigerant.
Installation, repair and maintenance works at the refrigeration system must only be carried out by certified
skilled personnel (specialists). A certification in accordance with EC regulation 303/2008 must be
available.
The requirements of the EC 842/2006 directive must be met under all circumstances.
Please refer to the indications on the name plate as regards the type and amount of refrigerant.
Comply with the following protective measures and rules of conduct:
1. Storage: Keep the container tightly closed. Keep it in a cool and dry place. Protect it against heat and
direct sunlight. Keep it away from ignition sources.
2. Handling: Take measures against electrostatic charging. Ensure good ventilation/suction at the
workplace. Check fittings, connections and ducts for tightness. Do not inhale the gas. Avoid contact
with the eyes or the skin.
3. Prior to carrying out works on refrigerant-carrying parts, remove the refrigerant to such an extent that
safe working is possible.
4. Do not eat, drink or smoke during work. Keep out of the reach of children.
5. Breathing protection: ambient-air-independent respirator (at high concentrations).
6. Eye protection: sealing goggles.
7. Hand protection: protective gloves (e.g. made of leather).
8. Personal protection: protective clothing.
9. Skin protection: use protective cream.
In addition, the safety data sheet for the refrigerant needs to be observed!
Caution!
Hot surfaces!
During operation, several components can reach surface temperatures of more than 140°F (60°C).
There is the risk of burns.
All components concerned are installed inside of the closed housing. The housing must only be opened
by certified skilled personnel3.
Caution!
Improper use!
The device is intended for the separation of water in compressed air. The dried air cannot be used for
breathing-air purposes and is not suitable for the direct contact with food.
This dryer is not suitable for the treatment of contaminated air or of air containing solids.
3
Certified skilled personnel are persons who are authorised by the manufacturer, with experience and technical training, who are well-
grounded in the respective provisions and laws and capable of carrying out the required works and of identifying and avoiding any
risks during the machine transport, installation, operation and maintenance.
Qualified and authorised operators are persons who are instructed by the manufacturer regarding the handling of the refrigeration
system, with experience and technical training, and who are well-grounded in the respective provisions and laws.

10 DRYPOINT® RAX 20-500 NA 1ph UL
Note!
Contaminated intake air!
In the event that the intake air is strongly contaminated (ISO 8573.1 class 3.-3 or poorer quality), we
recommend the additional installation of a prefilter (e.g. CLEARPOINT F040), to avoid clogging of the
heat exchanger.
Caution!
Heating-up through fire!
In the event of a heating-up through fire, the containers and pipes of the refrigerant system can
burst.
In this case, please proceed as follows:
Switch off the refrigeration plant.
Switch off the mechanical ventilation of the machinery compartment.
Use ambient-air-independent respirators.
Containers and plants which are filled with refrigerant can burst violently in the event of fire.
The refrigerants themselves are incombustible, but they are degraded to very toxic products at high
temperatures.
Remove the container/plant from the fire zone, as there is the risk of bursting!
Cool down containers and bottles via a directed water jet from a safe position.
In the event of fire, please use an approved fire extinguisher. Water is not a suitable agent to extinguish
an electrical fire.
This must only be carried out by persons who are trained and informed about the hazards emanating
from the product.
Caution!
Unauthorised intervention!
Unauthorised interventions may endanger persons and plants and lead to malfunction.
Unauthorised interventions, modification and abuse of the pressure devices are prohibited.
The removal of sealings and leadings at safety devices is prohibited.
Operators of the devices must observe the local and national pressure equipment regulations in the
country of installation.
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Note!
Ambient conditions!
In the event that the dryer is not installed under suitable ambient conditions, the ability of the device to
condense refrigerant gas is impaired. This can result in a higher load of the refrigerating compressor, and
in a loss of efficiency and performance of the dryer.
This in turn leads to overheated condenser fan motors, to malfunction of electric components and to a
breakdown of the dryer. Failures of this type will affect warranty considerations.
Do not install the dryer in an environment in which chemicals with a corrosive effect, explosive gases,
toxic gases, evaporation heat, high ambient temperatures or extreme dust and dirt can be found.
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Proper use
DRYPOINT® RAX 20-500 NA 1ph UL 11
4 Proper use
This dryer was designed, manufactured and tested to separate the moisture which normally exists in compressed air.
Any other use is considered improper.
The manufacturer shall not be liable for problems occurring as a consequence of improper use. The user alone is
responsible for any damage resulting from that.
Furthermore, the correct use includes the compliance with the installation instructions, in particular in respect of:
•The voltage and frequency of the main voltage supply.
•The pressure, temperature and flow rate of the inlet air.
•The ambient temperature.
When delivered, the dryer is tested and fully assembled. The customer only needs to connect the device to the system
in accordance with the instructions in the following chapters.
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5 Exclusion from a field of application
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Note!
Improper use!
The device is intended for the separation of water in compressed air. The dried air cannot be used for
breathing-air purposes and is not suitable for the direct contact with food.
This dryer is not suitable for the treatment of contaminated air or of air containing solids.

Operating instructions in accordance with the 97/23/EC Pressure Equipment Directive
12 DRYPOINT® RAX 20-500 NA 1ph UL
6 Operating instructions in accordance with the 97/23/EC Pressure Equipment Directive
The DRYPOINT® RAX 20-500 NA UL compressed-air refrigeration dryer contains pressure equipment in the sense of
the 97/23/EC Pressure Equipment Directive. Therefore, the entire plant needs to be registered with the supervisory
authority if required in accordance with the local regulations.
For the examination prior to the start-up and for periodic inspections, the national regulations need to be observed, such
as the industrial safety regulation in the Federal Republic of Germany. In countries outside the EU, the respective
regulations in force there need to be adhered to.
The proper use of pressure devices is the basic requirement for safe operation. As regards pressure devices, the
following points need to be observed:
•The DRYPOINT®RAX 20-500 NA UL compressed-air refrigeration dryer must only be employed within the pressure
and temperature range limits indicated by the manufacturer on the name plate.
•No welding must be carried out on the pressure parts.
•The DRYPOINT®RAX 20-500 NA UL compressed-air refrigeration dryer must neither be installed in insufficiently
ventilated rooms nor near heat sources or inflammable substances.
•To avoid fractures resulting from material fatigue, the refrigeration dryer should not be exposed to vibrations during
operation.
•The maximum operating pressure indicated by the manufacturer on the name plate must not be exceeded. It is the
installer's responsibility to install the appropriate safety and control devices. Prior to the start-up of the DRYPOINT®
RAX 20-500 NA UL compressed-air refrigeration dryer, the connected pressure generator (compressor etc.) must
be set to the max. permissible operating pressure. The integrated safeguard needs to be checked by an approved
inspection agency.
•The documents related to the DRYPOINT®RAX 20-500 NA UL compressed-air refrigeration dryer (manual, operating
instructions, manufacturer's declaration etc.) must be kept safe for future reference.
•No objects whatsoever must be installed at or placed on the DRYPOINT®RAX 20-500 NA UL compressed-air
refrigeration dryer and the connecting lines.
•Installation of the plant in frost-free places only.
•Operation of the plant is only permissible with fully closed and intact housing and cover panels. Operation of the
plant with damaged housing/cover panels is prohibited.
7 Transport
Check the packaging for visible loss or damage. If no visible damage can be ascertained, place the unit in close proximity
to the place of installation and unpack the device.
During this procedure, the dryer must always remain in an upright position. The components may be damaged when the
unit is tilted or turned upside down.
Store the device in a dry environment and do not expose it to extreme weather conditions.
Handle with care. Strong shocks can cause irreparable damage.
8 Storage
Keep the device away from extreme weather conditions
even when packaged.
Keep the dryer in an upright position, also while it is stored.
Tilting the device or turning it upside down can cause
irreparable damage to some components.
When the dryer is not in use, it can be stored in its
packaging in a dust-free and protected place at a
temperature of up to max. 122°F (50°C) and at a specific
humidity of max. 90%. If the storage period exceeds 12
months, you should contact the manufacturer.
The packaging material is recyclable. Dispose of the material in accordance with the
directives and provisions in force in the country of destination
SCC0001

Installation
DRYPOINT® RAX 20-500 NA 1ph UL 13
9 Installation
9.1 Place of installation
Note!
Ambient conditions!
In the event that the dryer is not installed under suitable ambient conditions, the ability of the device to
condense refrigerant gas is impaired. This can result in a higher load of the refrigerating compressor, and in
a loss of efficiency and performance of the dryer.
This in turn leads to overheated condenser fan motors, to malfunction of electric components and to a
breakdown of the dryer. Failures of this type will affect warranty considerations.
Do not install the dryer in an environment in which chemicals with a corrosive effect, explosive gases, toxic
gases, evaporation heat, high ambient temperatures or extreme dust and dirt can be found.
Minimum installation requirements:
•Choose an area which is clean and dry, free from dust and protected against atmospheric disturbances.
•The load-bearing zone must be even, horizontal and able to bear the weight of the dryer.
•Minimum ambient temperature +34°F (+1°C).
•Maximum ambient temperature +122°F (+50°C).
•Ensure a proper cooling air replacement.
•Allow a sufficient clearance on each side of the dryer for proper ventilation and to facilitate maintenance operations.
The dryer does not require attachment to the floor surface.
Do not obstruct the ventilation grille (not even partially).
Prevent any recirculation of the outgoing cooling air.
Protect the dryer against draughts.
Note!
Dryers models DP RAX 20 –75 can be wall-mounted. See fixing dimensions on dimensional drawings
in the appendices section.
The hanging mounting inevitably causes the obstruction of the ventilation grid positioned on the panel
facing the wall fixing. This obstruction, in any case, does not prejudge the efficiency of the ventilation
inside the dryer which is guaranteed by other grids on the other panels.

Installation
14 DRYPOINT® RAX 20-500 NA 1ph UL
9.2 Installation plan
1
Air compressor
2
Aftercooler
3
Condensate separator
4
Prefilter
5
Bypass group
6
Dryer
7
Compressed-air tank
8
Final filter
9
Bekomat condensate drain
Installation type A is recommended when the total consumption corresponds to the throughput rate of the compressor.
Installation type B is recommended when the air consumption constantly varies, with peak values which considerably
exceed the throughput rate of the compressor. The storage capacity of the tank must be dimensioned in such a way that
a possible short-term high air demand (peak air consumption) can be compensated.
Do not obstruct the ventilation grille (not even partially).
Prevent any recirculation of the outgoing cooling air.
Protect the dryer against draughts.
Note!
Contaminated intake air!
In the event that the intake air is strongly contaminated (ISO 8573.1 class 3.-3 or poorer quality), we
recommend the additional installation of a prefilter (e.g. CLEARPOINT F040), to avoid clogging of the heat
exchanger.
2
2
1
IN
OUT
7
- A -
- B -
1
7
6
IN
OUT 5
9
8
9
4
9
3
9
9 9
34
9
9
8
6
5

Installation
DRYPOINT® RAX 20-500 NA 1ph UL 15
9.3 Correction factors
Correction factor for operating pressure modifications:
Inlet air pressure psig
60
80
100
120
140
160
180
203
barg
4
5.5
7
8
10
11
12
14
Factor (F1)
0.79
0.91
1.00
1.07
1.13
1.18
1.23
1.27
Correction factor for ambient temperature modifications :
Ambient temperature ºF
80
90
95
100
105
110
115
122
ºC
27
32
35
38
40
43
45
50
Factor (F2)
1.11
1.09
1.06
1.00
0.94
0.87
0.78
0.69
Correction factor for inlet air temperature modifications:
Air temperature ºF
90
100
110
122
130
140
150
158
ºC
32
38
43
50
55
60
65
70
Factor (F3)
1.16
1.00
0.82
0.68
0.61
0.52
0.45
0.40
Correction factor for DewPoint modifications:
DewPoint ºF
38
41
45
50
ºC
3
5
7
10
Factor (F4)
1.00
1.08
1.20
1.36
Calculation of the actual air throughput:
Actual air throughput = air throughput acc. to planning x factor (F1) x factor (F2) x factor (F3) x factor (F4)
Example:
The DRYPOINT RAX 75 NA UL has a planned nominal capacity of 75 scfm (127 m³/h). The highest
achievable air mass under the following operating conditions is:
−Air inlet pressure = 120 psig (8 barg)
−Ambient temperature = 115°F (45°C)
−Air inlet temperature = 122°F (50°C)
−Pressure dew point = 50°F (10°C)
Factor (F1) = 1.07
Factor (F2) = 0.78
Factor (F3) = 0.68
Factor (F4) = 1.36
Every function parameter corresponds to a numerical factor which, multiplied by the planned nominal capacity,
determines the following:
Actual air throughput = 75 x 1.07 x 0.78 x 0.68 x 1.36 = 58 scfm (99 m³/h)
58 scfm (99 m³/h) is the maximum flow rate of the dryer under the aforementioned operating conditions.
Selection of the best suitable model in accordance with the operating conditions:
Air throughput acc. to planning =
Requ.airthroughput
Factor(F1)xFactor(F2)xFactor(F3)xFactor(F4)
Example:
The following operating parameters are known:
−Required air mass = 100 scfm (170 m3/h)
−Air inlet pressure = 120 psig (8 barg)
−Ambient temperature = 115°F (45°C)
−Air inlet temperature = 122°F (50°C)
−Pressure dew point = 50°F (10°C)

Factor (F1) = 1.07
Factor (F2) = 0.78
Factor (F3) = 0.68
Factor (F4) = 1.36
To find out the correct dryer version, the required air mass must be divided by the correction factors of the parameters
indicated above:
Air throughput acc. to planning =
100
= 130 scfm (221 m³/h)
1.07x0.78x0.68x1.36
The suitable model for these requirements is DRYPOINT RAX 150 NA UL (with a spec. nominal capacity of
150 scfm [255 m³/h]).

Installation
16 DRYPOINT® RAX 20-500 NA 1ph UL
9.4 Connection to the compressed-air system
Danger!
Compressed air!
All works must only be carried out by qualified skilled personnel.
Never work on compressed-air systems which are under pressure.
The operator or the user must ensure that the dryer is never operated with a pressure exceeding the
maximum pressure value indicated on the name plate.
Exceeding the maximum operating pressure can be dangerous for the operator but also for the device.
The air temperature and the air flow at the inlet of the dryer must lie within the limit values indicated on the name plate.
The connecting lines must be free from dust, iron rust, shards and other contaminations and correspond to the flow rate
of the dryer. Should air with a very high temperature be treated, the installation of an aftercooler may be necessary. For
the implementation of maintenance works, the installation of a bypass system is recommended.
The dryer was designed in such a manner that vibrations that may occur during operation are limited. Therefore, it is
advisable to employ connecting lines (flexible hoses, vibration-inhibiting fittings etc.) which protect the dryer against
possible vibrations in the pipework.
===== Ende der Stückliste =====
Note!
Contaminated intake air!
In the event that the intake air is strongly contaminated (ISO 8573.1 class 3.-3) or poorer quality, we
recommend the additional installation of a prefilter (e.g. CLEARPOINT F040), to avoid clogging of the heat
exchanger.
CAUTION!
During the piping of the dryer, the inlet and outlet connections need to be supported as is shown in the
illustration.
Non-observance will cause damage.

Installation
DRYPOINT® RAX 20-500 NA 1ph UL 17
9.5 Electrical connections
Danger!
Supply voltage!
The connection to the electric mains should only be carried out by qualified skilled personnel and must
correspond to the legal provisions in force in your region.
Prior to connecting the device, please check the name plate to avoid exceeding the indicated values. The voltage
tolerance is +/- 10%.
DRYPOINT RAX 20-500 NA UL dryers are supplied with a power cord and safety plug (two-pole and earth connection).
Make sure that suitable fuses or circuit breakers in accordance with the indications on the name plate are available.
A residual-current device (RCD) with In =0.03A is suggested. The cross-section of the power supply cable must
correspond to the power consumption of the dryer. In this respect, the ambient temperature, the cable laying conditions,
the length of the cables and the requirements of the local electricity supplier need to be considered.
Danger!
Supply voltage and missing earth connection!
Important: ensure that the plant is connected to earth.
Do not use plug adapters at the power plug.
Possible replacement of the power plug must only be carried out by a qualified electrician.
9.6 Condensate drain
Danger!
Compressed air and condensate under pressure!
The condensate is discharged at system pressure.
The drain pipe needs to be secured.
Never direct the condensate drain pipe at persons.
The dryer is delivered with an already integrated electronically level-controlled BEKOMAT condensate drain. Connect
the condensate drain with a collection system or container by properly screwing it on.
Do not connect the drain with pressurised plants.
Do not discharge the condensate into the environment.
The condensate accumulating in the dryer contains oil particles which were released into the air by the
compressor.
Dispose of the condensate in accordance with the local provisions.
It is advisable to install a water-oil separator, to which the total amount of condensate from the compressors,
dryers, tanks, filters etc. is supplied.
We recommend ÖWAMAT oil-water separators for dispersed compressor condensate and BEKOSPLIT
emulsion-splitting plants for emulsified condensate.

Start-up
18 DRYPOINT® RAX 20-500 NA 1ph UL
10 Start-up
10.1 Preliminary stages
Note!
Exceeding of the operating parameters!
Ensure that the operating parameters comply with the nominal values indicated on the name plate of the
dryer (voltage, frequency, air pressure, air temperature, ambient temperature etc.).
Prior to delivery, this dryer was thoroughly tested, packed and checked. Please verify the soundness of the dryer during
the initial start-up and check the perfect functioning during the first operating hours.
The initial start-up must be carried out by qualified personnel.
During the installation and operation of this device, all national regulations regarding electronics and any
other federal and state ordinances, as well as local provisions, need to be adhered to.
The operator and the user must ensure that the dryer is not operated without panels.
10.2 Initial start-up
Note!
The dryer must not be started up more than six times an hour. Wait at least five minutes prior to every
restart.
The user is responsible for the compliance with these provisions. Irreparable damage can be caused by
starting up the device too often.
The method below should be applied during the first start-up, after longer downtimes or subsequent to
maintenance works.
The start-up must be carried out by certified skilled personnel.
Processing sequence (see Section 11.1 "Control panel")
•Ensure that all steps of the "Installation" chapter have been carried out.
•Ensure that the connection to the compressed-air system is in accordance with the provisions and that the lines are
fixed and supported properly.
•Ensure that the condensate drain pipe is fixed in accordance with the provisions and that it is connected with a
collection system or a container.
•Ensure that the bypass system (if installed) is open and that the dryer is disconnected from the compressed-air
system.
•Ensure that the manual valve of the condensate drainage cycle is open.
•Remove any packaging material and other items which may block the space around the dryer.
•Establish the mains connection (plug into socket).
•Start the dryer by switching on the main switch on the control panel (pos. 1).
•Make sure that the DMC 18 electronic control unit is switched on.
•Ensure that the power consumption complies with the values on the name plate.
•Ensure that the fan runs properly –wait for the first interventions.
•Wait until the dew point remains stable.
•Slowly open the air inlet valve.
•Slowly open the air outlet valve.
•Slowly close the central bypass valve of the system (if installed).
•Check the pipes for air leakage.
•Ensure the proper functioning of the condensate drain cycle (wait for the first condensate discharges).
Note!
A dew point between 32°F (0°C) and +50°F (+10°C) displayed on the DMC 18 control unit is considered to
be correct according to the possible operating conditions (flow rate, air inlet temperature, ambient
temperature etc.).
During the operation, the refrigerating compressor runs continuously. The dryer needs to be switched on during the
entire compressed-air usage time, even if the compressed-air compressor works periodically.

DRYPOINT® RAX 20-500 NA 1ph UL 19
10.3 Shut down and restart
Shut down (see Section 11.1 "Control panel")
•Ensure that the dew point temperature indicated on the DMC 18 electronic control unit is stable.
•Interrupt the compressed-air supply.
•After a few minutes, stop the dryer by switching off the main switch on the control panel (pos. 1).
Restart (see Section 11.1 "Control panel")
•Make sure that the condenser is clean.
•Check whether or not voltage is applied at the dryer.
•Start the dryer by switching on the main switch on the control panel (pos. 1).
•Ensure that the DMC 18 electronic control unit is switched on.
•Wait a few minutes and then check, whether or not the dew point temperature indicated on the
DMC 18 electronic control unit is stable and whether or not the condensate is drained off at regular intervals.
•Establish the compressed-air supply.
During the operation, the refrigerating compressor runs continuously. The dryer needs to be switched on during the
entire compressed-air usage time, even if the compressed-air compressor works periodically.
Note!
A dew point 32°F (0°C) and +50°F (+10°C) displayed on the DMC 18 control unit is considered to be correct
according to the possible operating conditions (flow rate, air inlet temperature, ambient temperature etc.).
Note!
The dryer must not be started up more than six times an hour. Wait at least five minutes prior to every
restart.
The user is responsible for the compliance with these provisions. Irreparable damage can be caused when
starting up the device too often.

Technical data
20 DRYPOINT® RAX 20-500 NA 1ph UL
12 Technical data
12.1 Technical data DRYPOINT RAX 20-200 NA -P UL (1/115/60)