OMEGA AIR RDHP 20 User manual

Installation and operating
manual
Refrigeration Dryer Series RDHP 20 - 950
Please read the instructions carefully before installation or use. The proper and safe operation of
the refrigeration air dryer is ensured only by following the recommendations and conditions
stated in the instructions.
For additional questions, contact the manufacturer and inform him of the information on the data
plate found on the front of the dryer.

Dear customer!
Thank you for purchasing our product. In order for the product to serve well and reliably, please read
these installation and operating instructions carefully.
In order to avoid misuse of equipment and potential hazards for the operator, please read thoroughly
and strictly follow the instructions contained in this installation and operating manual.
Before packing and shipping, each unit of the RDHP refrigeration air dryers is subjected to rigorous
tests to ensure that the factory defects are removed and all the functions of the device for which it
was designed checked.
After correctly installing the unit in accordance with the instructions in this manual, it will be ready for
use without the need for additional settings. The operation is fully automated, and maintenance is
limited to a few checks and cleanings, as shown in the continuation of this manual.
These instructions must always be present at the unit and be available for the entire operating life
of the device. The instructions are considered as an integral part of each refrigeration air dryer.
This manual provides the user, installer and maintenance technician with all the technical information
needed to install, operate and perform routine maintenance work to ensure long service life. If spare
parts are required, they must be original. Requests for SPARE PARTS and any information relating to
the unit must be sent to the distributor or to the nearest service canter, indicating the MODEL and
SERIAL NUMBER located on the data plate of the device.
Due to uninterrupted technical development, we reserve the right to introduce the necessary changes
without prior notice. If you need further explanation or clarification, contact the manufacturer or
distributor of the device.

Table of Contents
1 GENERAL INFORMATION............................................................................................................................... 4
1.1. DEVICE INFORMATION ....................................................................................................................................... 4
1.2. INFORMATION ON THE SUPPLIER.......................................................................................................................... 4
1.3 BASIC.............................................................................................................................................................. 5
1.4. REFRIGERATION AIR DRYERS................................................................................................................................ 5
1.5 PROPER USE ..................................................................................................................................................... 5
2 SAFETY INSTRUCTIONS.................................................................................................................................. 6
3 TECHNICAL SPECIFICATIONS ..........................................................................................................................8
3.1 COMPONENTS................................................................................................................................................... 8
3.2 SPECIFICATIONS................................................................................................................................................. 9
4 REFRIGERATION AIR DRYER OPERATION ..................................................................................................... 11
5 REFRIGERATION AIR DRYER COMPONENTS ................................................................................................. 12
5.1 COMPRESSOR ................................................................................................................................................. 12
5.2 CONDENSER ................................................................................................................................................... 12
5.3. HEAT EXCHANGER 3IN1................................................................................................................................... 12
5.4 CONTROLLER RDC 2 ........................................................................................................................................ 13
5.4.1 ELECTRIC SCHEME RDC 2............................................................................................................................... 14
5.4.2 RDC 2PARAMETERS ..................................................................................................................................... 15
5.4.3 RDC 2MODBUS COMMUNICATION............................................................................................................... 17
5.5 EXPANSION VALVES.......................................................................................................................................... 18
5.6. TIMED CONDENSATE DRAIN .............................................................................................................................. 18
5.7 SAFETY FUNCTIONS .......................................................................................................................................... 19
5.7.1 LOW-PRESSURE SWITCH................................................................................................................................. 19
5.7.1 SAFETY FUNCTIONS OF RDC 2......................................................................................................................... 19
5.8 FILTER /DEHYDRATOR ...................................................................................................................................... 19
5.9 CAPILLARY TUBE .............................................................................................................................................. 19
6 EFFICIENCY .................................................................................................................................................. 20
7 TRANSPORT................................................................................................................................................. 20
8 STORING...................................................................................................................................................... 20
9 INSTALLATION............................................................................................................................................. 21
9.1 GENERAL REQUIREMENTS FOR INSTALLATION ........................................................................................................ 21
9.2 INSTALLATION POSITIONING............................................................................................................................... 22
9.3. INSTALLATION PROCEDURE ............................................................................................................................... 23
10 START-UP .................................................................................................................................................. 24
10.1 BEFORE START-UP.......................................................................................................................................... 24
10.2 START-UP .................................................................................................................................................... 24
11 REMOVE FROM USE .................................................................................................................................. 24
12 MAINTENANCE .......................................................................................................................................... 25
13 TROUBLESHOOTING TECHNICAL PROBLEMS.............................................................................................. 25
14 SPARE PARTS............................................................................................................................................. 27
15 WARRANTY ............................................................................................................................................... 28
16 MAINTENANCE NOTEBOOKS ..................................................................................................................... 29
17 DRAWINGS OF RDHP REFRIGERATION AIR DRYERS ............................... NAPAKA! ZAZNAMEK NI DEFINIRAN.

18 ELECTRO SCHEMES OF RDHP REFRIGERATION AIR DRYER ..................... NAPAKA! ZAZNAMEK NI DEFINIRAN.
1 General information
1.1. Device information
Please fill in the fields carefully. Correct data enables proper and efficient maintenance of the device,
selection of suitable spare parts and technical support.
1.2. Information on the supplier
Model of refrigeration air dryer:
Serial number:
Year of manufacture:
Date of installation:
Name:
Address:
Phone / Fax:
e-mail:

1.3 Basic
Compressed air contains contaminants such as water, oil and particles. Impurities need to be removed
or their concentration reduced to an acceptable level according to the requirements of the application.
The ISO 8573-1 standard specifies the purity / quality of the air for contaminants. The humidity (water
vapor content) can be expressed in terms of Pressure Dew Point (PDP). Dew point is the temperature
at which the air is 100% saturated with moisture. When the air temperature falls below the dew point,
moisture condenses. Reduction of moisture content to the point of dew point +3°C can be achieved by
refrigeration air dryers.
1.4. Refrigeration air dryers
Refrigeration air dryers are the best choice in all standard applications, where pressure dew point 3 °C
suffices. Examples of such applications are process air in the processing industry (pneumatic
equipment, wood industry, paint shop, chemical industry, pharmacy, etc.).
1.5 Proper use
⚠RDHP refrigeration air dryers are designed for efficient and quality preparation of dry compressed
air. This device must only be used for the purposes for which it was designed. All other uses of the
device are considered incorrect.
⚠The manufacturer is not liable under any circumstances for damage resulting from improper,
incorrect or unreasonable use of the device.
⚠Only use genuine spare parts. Warranty or Reclamation cannot be claimed for damage or
malfunction of the device caused by the use of non-original parts.

2 Safety instructions
⚠Improper use of the compressed air system and electrical installations can lead to injury or death.
⚠Improper handling (transport, installation, use, maintenance) of a refrigeration air dryer can lead
to serious injury or death. The result of improper use may be damage to the device and/or reduced
efficiency of the dryer.
⚠When operating the dryer, you must follow all relevant safety and accident prevention instructions,
all regulations and instructions for use. The RDHP refrigeration air dryer was developed in accordance
with the generally recognized rules of engineering practice.
⚠Ensure that the installation complies with local legislation.
⚠The user or operator of the refrigeration air dryer must be familiar with the installation,
commissioning and operation of the appliance.
⚠All safety information is intended to ensure your personal safety. If you do not have experience
with such systems, contact the manufacturer or local supplier for technical assistance.
⚠Before working on the dryer, ensure that the dryer is vented and not under pressure (this also
includes the closest components of the installation in front and behind the dryer) and that the dryer
is not connected to an electrical source.
⚠Do not exceed the maximum operating pressure or operating temperature (information on the
data label).
⚠The permissible operating temperatures and working pressures for the accessories of the
adsorption dryer are given in the technical documentation of this accessory. The maximum
temperature and pressure of the assembled system is the lowest maximum temperature or pressure
of any individual part of the system.
⚠Ensure that the refrigeration air dryer is not subject to vibrations that can cause fatigue and
cracking of material.
⚠The refrigeration air dryer must not be subjected to mechanical stress.
⚠All installation and maintenance work on the refrigeration air dryer can only be carried out by a
qualified and experienced specialist.
⚠It is forbidden to make any changes to the refrigeration air dryer.
⚠Vent the refrigeration air dryer system before performing any kind of installation or maintenance
work.
⚠Ensure that the refrigeration air dryer is installed in accordance with specifications and without
mechanical loads.

⚠Only use genuine spare parts.
⚠Only use refrigeration air dryers for intended purpose.
⚠When transporting the dryer, check and follow the local regulations for lifting and transporting
heavy objects.
⚠In the event of fire, do not use extinguishing water on the dryer and nearby objects.
⚠Wear suitable protective equipment: ear plugs, safety goggles, safety helmet, safety gloves and
safety shoes.
Data plate
Figure 1: Location of the data plate

3 Technical Specifications
3.1 Components
1. Heat exchanger 3in1 7. Switch
2. Condenser 8. Capillary tube
3. Compressor 9. Sensor for fan operation
4. Timed condensate drain 10. Filter / dehydrator
5. Controller
6. Hot gas bypass valve
Figure 2: Components (shown: RDHP 100)

3.2 Specifications
TECHNICAL SPECIFICATIONS
Max. operating pressure
45 barg
Max. inlet air temperature
55 °C (for temperature ≠ 35 °C apply correction factor)
Operating ambient temperature
1 °C to 45 °C (for temperature > 25 °C apply correction factor)
Storage conditions
1 °C to 65 °C, <90 % relative humidity
Pressure dew point
+ 3 °C
Filter requirement (inlet)
Prefilter 3 μm
Communication
MODBUS
Digital input
Remote ON/OFF
Digital output
Alarm
Condenser type
Air cooled
Compressor operation
Non-cycling
Condensate drain
Timer controlled (Automatic optional)
Refrigerant
R134a
Protection class (controller front)
IP 65
MATERIALS
Casing
Carbon steel
Casing corrosion protection
Epoxy powder paint
Evaporator
Brazed plate stainless steel
Evaporator insulation
Flexible elastomeric foam
Condenser
Aluminium fin and copper tube
Compressor
Carbon steel
Refrigerant piping
Copper
Controller enclosure
Plastic
SIZES
Compressed air
Electrical connection
Ambient air
Refrigerant
Dimensions & Mass
Model
(3)Flow
Connection
Pressure
drop
Power supply
(4)Power/
Consumption
Cooling
flow
Heat
rejec.
Type
Mass
W x L x H
Net
m3/h
bar
Ph~V-Hz
kW
m3/h
kW
kg
mm
kg
RDHP 20
20
G 3/8” BSP-F
<0,3
1~230-50*
0,170 / 0,135
350
0,12
R134a
0,20
352 x 485 x 499
24
RDHP 35
35
G 3/8” BSP-F
<0,3
1~230-50*
0,170 / 0,135
350
0,21
R134a
0,23
352 x 485 x 499
24
RDHP 50
50
G 3/8” BSP-F
<0,3
1~230-50*
0,170 / 0,135
350
0,30
R134a
0,34
352 x 485 x 499
25
RDHP 75
75
G 3/8” BSP-F
<0,3
1~230-50/230-60
0,40 / 0,25
350
0,47
R134a
0,38
352 x 485 x 499
26
RDHP 100
100
G 3/8” BSP-F
<0,3
1~230-50/230-60
0,40 / 0,25
350
0,62
R134a
0,58
352 x 485 x 499
31
RDHP 140
140
G 1/2” BSP-F
<0,3
1~230-50/230-60
0,50 / 0,38
700
0,83
R134a
0,61
356 x 552 x 684
44
RDHP 180
180
G 1/2” BSP-F
<0,3
1~230-50/230-60
0,60 / 0,45
700
1,05
R134a
0,65
356 x 552 x 684
49
RDHP 235
235
G 1/2” BSP-F
<0,3
1~230-50/230-60
0,60 / 0,45
700
1,37
R134a
0,73
356 x 552 x 684
53
RDHP 300
300
G 3/4” BSP-F
<0,3
230V, 50 Hz*
0,73 / 0,60
700
1,32
R134a
0,90
356 x 552 x 684
62
RDHP 380
380
G 3/4” BSP-F
<0,3
230V, 50 Hz*
0,73 / 0,60
700
1,67
R134a
0,95
356 x 552 x 684
65
RDHP 480
480
G 1” BSP-F
<0,3
1~230-50/230-60
1,15 / 0,90
1100
2,10
R134a
1,10
495 x 589 x 827
88
RDHP 600
600
G 1” BSP-F
<0,3
1~230-50/230-60
1,15 / 0,90
1100
2,64
R134a
1,20
495 x 589 x 827
91
RDHP 750
750
G 1” BSP-F
<0,3
1~230-50/230-60
1,20 / 1,00
1100
3,23
R134a
1,40
495 x 589 x 827
105
RDHP 950
950
G 1” BSP-F
<0,3
1~230-50/230-60
1,30 / 1,10
2200
4,09
R134a
1,60
491 x 708 x 973
111
↓Larger sizes available upon request ↓
(3) Nominal condition: inlet flow 20 °C at 1 bara, ambient 25 °C, dryer inlet 35°C at 40 barg, 3 °C pressure dew point (-36,6 °C atmospheric).
(4) For 60 Hz 20 % more than stated. Consumption at nominal conditions.
*Special 60 Hz version available.

CORRECTION FACTORS
To calculate the correct capacity of a given dryer based on actual operating conditions, multiply the nominal
inlet flow by the appropriate correction factor(s). CORRECTED CAPACITY = NOMINAL FLOW CAPACITY x COP x
CAT x CIN x CDP.
OPERATING PRESSURE DEW POINT
[bar] 15 20 25 30 35 40 45 °C 3 5 7 10
[psi] 218 290 363 435 508 580 652 °F 37,4 41 44,6 50
COP 0,57 0,7 0,8 0,88 0,94 1 1,05 CDP 1 1,09 1,19 1,37
INLET TEMPERATURE AMBIENT TEMPERATURE
°C ≤25 30 35 40 45 50 55 °C ≤25 30 35 40 45
°F 77 86 95 104 113 122 131 °F 77 86 95 104 113
CIN 1,2 1,12 1,00 0,83 0,69 0,59 0,50 CAT 1 0,96 0,9 0,82 0,72