Comprag DV7508 User manual

OPERATING MANUAL
BEDIENUNGSANLEITUNG
DV-Series
Screw air compressor
Schraubenkompressoren
DV-Serie
DV75–90
Version 1.2
Version 1.2
EN
DE
Seite. 33
ИнструкцИя по эксплуатацИИ
Версия 1.2
стр. 63
DV-Серия
Компрессор воздушный винтовой
RU

© Comprag ®. All rights reserved.
No part of the text and /or diagram may be reprinted or used without the prior written permission of Comprag.
The manufacturer reserves the right to make changes to a product design in order to enhance its technological
and operational parameters without notifying the user.
The product type may considerably differ to that displayed in documents.

3
COMPRAG Screw air compressor DV-Series
Table of contest
1. Safety guidelines
1.1 Symbols used in the instructions
1.2 General safety guidelines
1.3 Safety precautions for start-up
1.4 Safety precautions during operation
1.5 Safety precautions for maintenance and repair
2. Technical data and functional description
2.1 Technical data
2.2 General description
2.3 Function diagram and main components
2.4 Functional description
2.5 Control system
2.6 Electrical diagram and main components
2.7 Electrical connection values
3. Start up
3.1 Lifting and carrying
3.2 Dimensions
3.3 Requirements on installation area
3.4 Connection to the compressed airline
3.5 Connection to power supply
4. Operation
4.1 Control panel
4.2 Starting the compressor
4.3 Switching off the compressor
5. Maintenance
5.1 Maintenance schedule
5.2 Checking oil level
5.3 Replacing oil and oil lter
5.4 Replacing air lter
5.5 Changing air-oil separator
5.6 Cleaning radiator
5.7 Checking suction valve
5.8 Servicing bearings of electric motor
6. Fault handling
6.1 Faults and corrective actions
7. Storage and disposal
7.1 Storage conditions
7.2 Disposal of oils and process condensate
EN

4Version 1.2
1. Safety guidelines
1.1 Symbols used in the instructions.
Lethal hazard.
Warning.
Attention.
1.2 General safety guidelines.
Carefully familiarise yourself with the technical documentation,
operating instructions and safety guidelines. Most accidents as-
sociated with the use of compressor equipment occur as a result
of non-compliance with safety guidelines. Prevent hazards from
developing and adhere to the safety guidelines. The main rules
are given in the following section.
The user is solely liable for injuries or damages which occur due
to non-compliance with safety guidelines during installation, op-
eration or servicing, as well as unauthorised use of equipment!
1. The operator must stringently adhere to safety guidelines provided for by these instruc-
tions and local legislation!
2. When choosing between these safety guidelines and the regulations provided for by
local legislation, those rules which provide for more stringent requirements shall apply.
3. Only trained maintenance personnel with the relevant level of professional training are
permitted to operate, service and repair Comprag equipment.
4. Compressed air owing immediately from the compressor may contain oil and impurities

5
COMPRAG Screw air compressor DV-Series
and is not suitable for breathing! Compressed air has to be puried to an air purity grade
suitable for breathing, in accordance with the standards prescribed by local legislation.
5. Compressed air is an extremely hazardous energy source. Compressed air must not be
used for unintended purposes! Do not use it to clean clothing and footwear and never
point compressed air hoses at people and animals! When using air to clean equipment,
take extra caution and wear safety goggles!
6. All maintenance, repair, setup and installation work etc. must be performed while the
equipment is turned off, disconnected from the power source, with compressed-air hos-
es disconnected from the equipment, and with the use of safety goggles! Ensure that
equip- ment is disconnected from the compressed air system and is not under pressure.
1.3 Safety precautions for start-up
The user is solely liable for injuries or damages which occur due to
non-compliance with safety guidelines during installation, operati-
on or servicing, as well as unauthorised use of equipment!
1. Equipment must only be unloaded/loaded using the appropriate handling devices or hoisters.
Equipment must not be manually lifted or moved. Do not leFVe equipment sus- pended. Use
a helmet during unloading operations.
2. Arrange the equipment in a dry and clean facility which provides shelter from precipi- tation.
The facility must be well ventilated, and forced ventilation should be provided if necessary.
3. Worn, damaged or spoiled compressed-air hoses should not be used. Ensure that hoses cor-
respond to the equipment in terms of nominal diameter and working pressure.
4. When using several compressor stations in a system, each compressor must hFVe a manually
operated valve for cutting off any of the compressors in the case of emergency.
5. Explosive and re-hazardous admixtures such as solvent vapours and carbon dust etc.must
not be released into the atmosphere.
6. Ensure unrestricted access to the compressed-air hose from the compressor. Do not clutter it
and do not store ammable materials in its immediate vicinity.
7. Do not pinch or deform the compressed-air feed hoses.
8. Do not cover holes used to provide equipment with air for cooling. Ensure the facility is well
ventilated.

6Version 1.2
9. When using remote control, the equipment must give a legible and clear warning of this:‘AT-
TENTION: this machine is being controlled remotely and may start operating without warning!’
An operator who is remotely controlling equipment must ensure that no installation or other
work is being performed with the equipment at that moment. Once the equip- ment is turned
off remotely, the operator must ensure that the equipment is actually turned off!
10. Equipment must be earthed. Provide short-circuit protection. The starting knife switch must
be in the immediate vicinity of the equipment and protect against unauthorised start-up.
The user bears full responsibility for compliance with the operat-
ing condi- tions of the electrical motor installed in the equipment.
Equipment must be used with protection devices. The protection devices
must protect the electric motor from short circuits, overloading (systematic
and start-up) and open-phase conditions. Installation of protection devices
is the responsibility of the user.
11. There must be an information plate afxed next to the control panel on equipment with an in-
dependent control system featuring an automatic restart function: ‘ATTENTION: This machine
may start operating without warning!’
12. Any tanks and vessels working under pressure must be tted with safety-relief valves! Unau-
thorised installation, disassembly or adjustment of attached safety-relief valves is not allowed.
1.4 Safety precautions during operation.
The user is solely liable for injuries or damages which occur due to
non-compliance with safety guidelines during installation, opera-
tion or servicing, as well as unauthorised use of equipment!
1. Ensure that hoses correspond to the equipment in terms of nominal diameter and working
pressure. Check the attachment of every hose coupling before start-up. An insecurely fas-
tened hose may cause serious injury.
2. Never turn on equipment if you suspect the presence of highly ammable impurities in the air!
3. The operator remotely controlling equipment must ensure that no installation or other
work is being performed with the equipment at that moment! An information plate must
be afxed to the equipment in relation to this: ‘ATTENTION: this machine is being controlled
remotely and may start operating without warning!’
4. An operator is not allowed to operate equipment if the operator is fatigued, in a state of
intoxication from alcohol, drugs or medicine that reduces the body’s reaction time.
5. The equipment must not be operated if parts of the casing hFVe been removed. Doors or
panels may be opened for short durations for inspection and scheduled checks. It is advis-
able to wear hearing protection.

7
COMPRAG Screw air compressor DV-Series
In some types of equipment, open doors or removal of panels du-
ring operation may lead to overheating.
6. Personnel in conditions or a facility where the sound pressure level reaches or exceeds
90 dB (A), must wear ear protectors.
7. If the air used for cooling equipment is used while the facility is being heated, undertake
measures for it to be ltered so that it is suitable for breathing.
8. Regularly check that:
• safety devices and attachments are in place;
• all hoses and pipes are in good condition and sealed;
• there are no leaks;
• brackets and structural components are tightened;
• all electrical cables and contacts are in good condition and safe to use;
• safety devices are fully functional and there is no contamination etc;
• all structural components are in working order, with no signs of wear and tear.
1.5 Safety precautions for maintenance and repair
The user is solely liable for injuries or damages which occur due to
non-compliance with safety guidelines during installation, operati-
on or servicing, as well as unauthorised use of equipment!
1. Only original spare parts and ancillary items may be used. Using spare parts from other man-
ufactures may lead to unpredictable results and consequently accidents.
2. When performing installation and repair work, always wear goggles!
3. Before connecting or disconnecting equipment, disconnect it from the main pneumatic sys-
tem. Ensure that the hoses aren’t under pressure!
4. Before beginning installation or other work, ensure that equipment is not pressurised. Instal-
lation work must not be carried out on equipment under pressure.
5. All maintenance work should be carried out only when the temperature of all structural ele-
ments falls to room temperature.
6. Never use highly ammable solvents or carbon tetrachloride for cleaning structural elements.
When wiping, take precautions against the poisonous vapours of cleaning uids.
7. When carrying out installation and repair work, an information plate should be afxed to the control
panel to warn against unauthorised start-up. For example, “Do not turn on. Personnel operating!”

8Version 1.2
8. The operator remotely controlling equipment must ensure that no installation or other work is
being performed with the equipment at that moment! An information plate must be afxed to
the equipment in relation to this: See 1.3.9.
9. Maintain cleanliness in the facility where the equipment is installed. Close open inlets and out-
lets during installation with dry clothes or paper to prevent rubbish entering the equipment.
10. Welding or other similar operations must not be carried out in the immediate vicinity of the
equipment and vessels under pressure.
11. If there is any suspicion of overheating, combustion or other emergency, turn off the equip-
ment. Immediately disconnect it from the power supply. Do not open the doors of equipment
until the temperature falls to room temperature, in order to prevent burns or injury.
12. Naked ames must not be used as a light source for inspecting and checking equipment.
13. Never use caustic solvents, which may damage materials of the pneumatic system
14. After performing installation or other work, ensure that no instruments, rags or spare parts
hFVe been left inside the equipment.
15. Pay particular attention to the safety-relief valves. Thoroughly inspect them and remove
any dust and dirt. They must not be allowed to suffer any loss in function under any circum-
stances. Remember that your safety depends on their functionality!
16. Before beginning work in normal mode after maintenance or repair work, check that the
working pressure, temperature and other characteristics are correctly set. Ensure that all
control devices are installed and functioning properly.
17. When replacing lters, separators etc., wipe away dust, dirt and oil residue from the area
where they are installed with a dry cloth.
18. Protect the motor, air lter, electrical components and control components etc. from com-
ing into contact with condensate. For instance, blow down with dry air.
19. Use protective gloves during installation and repair work in order to FVoid burns and injury
(for instance, during oil change).

9
COMPRAG Screw air compressor DV-Series
2. Technical data and functional description
Entitlement to free handling of faults arising during the guarantee
period is forfeited when:
- No warranty service coupon for the compressor or it is lled out
incorrectly
- No records for the compressor’s scheduled maintenance are
entered in the compressor’s service book
- Unoriginal parts and lubricants are used
2.1 Technical data
Article Model
Drive
po
w
er
,
compressor
(kW)
Max. operat-
ing pressure
(bar)
Output
(m
3
/min)
Rated
v oltage ,
compressor
(phase/V/Hz)
Noise
(dB)
Screw
connection
Oil
capacity,
liter
11300105 DV7508 75 5-8 12,80
3/380-
420/50
75
DN 50 40
11300106 DV7510 5-10 11,30
11300115 DV9008 90 5-8 15,40 75
11300116 DV9010 5-10 13,40
2.2 General description
The DV-Series oil-lled screw compressor series is designed for uninterrupted and efcient
compressed-air production.
The DV-Series compressor is an electric motor-operated, intake-regulated, direct-driven and
air-cooled compressor, enclosed in a sound-insulated canopy. An electronic controller v-Log
with an LCD indicator panel is provided, including start and stop buttons and an emergency
stop button. Pressure and temperature relays are used for system control and protection.

10 Version 1.2
2.3 Function diagram and main components
М
Air flow
Air/Oil mix flow
Oil flow
Т
Temperature sensor
Р
Pressure sensor
Pneumatic control line
Р
Т
16
14
15
17
19
18
6
2
1
3
10 9
4
5
8
7
11
12
13
20
Fig. 2.3 Function diagram DV75-90
Main components
1Electric motor 11 Min. Pressure valve
2 Flexible coupling 12 Non-return valve
3Air end 13 Heat-exchanger, Air section
4Air lter 14 Heat-exchanger, Oil section
5Intake valve 15 Thermostatic valve
6Air-Oil separation tank 16 Oil lter
7Safety valve 17 Drain valve
8Air-Oil separator 18 Oil lling plug
9Throttle valve 19 Oil level sight glass
10 Non-return valve 20 Air outlet valve

11
COMPRAG Screw air compressor DV-Series
2.4 Functional description (see Fig. 2.3)
Air ow:
Air drawn through Air lter (4) and open Intake valve (5) into compressor Air-end (3) is compressed.
Compressed air and oil ow into Air-Oil separation tank (6). The air is discharged via Min. Pressure
valve (11) through Heat-exchanger (13) towards the Air Outlet Valve (20).
Oil ow:
Air pressure forces oil from the air-oil separation tank (6) through the heat-exchanger (14) and
the oil lter (16) to the compressor air-end (3) and the lubrication points. In the air-oil separation
tank (6), most of the oil is removed centrifugally; the rest is removed by the air-oil separator (8).
The oil system is tted with a thermostatic valve (15). When the oil temperature is below the
set-point of the thermostatic valve, the thermostatic valve shuts off the oil supply from oil heat-ex-
changer (14). The thermostatic valve starts opening the supply from heat- exchanger (14) when
the oil temperature exceeds the valve’s setting. The setting of the thermostatic valve depends on
the model. See table Technical Data.
Cooling system:
The cooling system comprises a combined air section (13) and an oil section (14) heat- exchanger.
A cooling fan, equipped with a separate electric motor, generates the cooling air in order to cool
the heat-exchanger.
2.5 Control system
Fig. 2.5 Control system

12 Version 1.2
The system is controlled by an electronic controller v-Log (2) which keeps the net pressure
within programmable pressure limits by automatically loading and unloading the compressor
in relation to air consumption.
Main operating mode: Upon start-up, the frequency inverter accelerates the compressor over
15 seconds to the maximum permitted frequency. Pressure builds up to the specied target val-
ue. When it is reached, the compressor maintains the set pressure by varying the current signal
coming from the frequency inverter. If the consumption of compressed air increases, the frequency
coming from the frequency inverter also increases and thus the rotation of the main motor shaft. If
the consumption of compressed air decreases, the frequency coming from the frequency inverter
also decreases. However, the compressed-air pressure remains constant. When the off button is
pressed, the frequency inverter lowers the frequency over 15 seconds to the minimum permitted
frequency and switches off the compressor.
Unloading: If air consumption is less than the air delivered by the compressor, the net pressure
increases. When the net pressure reaches the upper limit of working pressure (unloading
pressure), the solenoid valve (3) is de-energized. The damper (5) of the intake valve (1) closes
the air inlet opening by a spring force:
1. The control pressure present in the chambers of the intake valve (1) and the unloading
valve (7) is vented into the atmosphere via the solenoid valve (3).
2. The damper (5) of the intake valve (1) closes the air inlet opening.
3. The unloading valve (7) is opened by the air-oil separation tank pressure. The pressure
from the air-oil separation tank (4) is released towards the air inlet.
4. The pressure is stabilized at a low value, air output is stopped (0 %) and the compressor
runs unloaded.
Loading: When the net pressure decreases to the loading pressure, the solenoid valve is energized:
1. The control pressure is fed from the air-oil separation tank (4) via the solenoid valve (3) to
the unloading valve (7).
2. The unloading valve (7) closes the air blow-off opening. The damper (5) moves backdown
and causes the intake valve (1) to open fully.
Air output is resumed (100 %), and the compressor runs loaded

13
COMPRAG Screw air compressor DV-Series
2.6 Electrical diagram and main components
Fig. 2.6.1 Electrical diagram DV75-90
Main components
К1---К4 Contactor YA Solenoid valve
М1, М2 Electric motor QS Automatic power switch
ТTemperature sensor CT2 Transformer
I/P Pressure sensor R,C RC lter
SB Emergency stop Tr Transformer
F1, F2 Fuses v-LOG Controller
FI Frequency inverter HIndicator
1
11
2
22
3
33
QS
Tr
380-415VAC
101100 200201
1
2
3
24VAC230VAC
K1.1
UVW
RST
3~ M1
AI1
24V
DI1
TC1
TB1
400
500
502
K4.1
T2
a2
b2
c2
YA
Re2
201202203F2
2A
SB1.2
209
200
A1
A2
K4
R
C
R
C
A1
A2
K1
R
C
210
503
500
Re4
RS-485
27
28
29
401
485+
485-
30
31
GND
203
H
Ready
Re(FI)2
504
TC2
TA2
504
K4.1
3 X 380-415VAC
3~
M2(30-90)
3~
M3(75-90)
10 919 20 21
11 22 33
18
17
16
15
c
Re1
Re2
102
203
209
210
u1 u2 u3
6
3
4
5
7
Re3
Re4
c14
13
12 83031
RS-485
GND
503
502
"RS-485"
30 31
A1 B1 A2 B2
RS-485
500
203
ON/ OFF
Remote
Re(FI)1
27
28
29
c2
b2
a2
27
28
29
22
23
25
26
I
P
T
F1
2A
SB1.1 501
v-Log
FI

14 Version 1.2
2.7 Electrical connection values
Voltage (V) Frequency (Hz) DV75.. DV90..
Мaterial - copper. Cable size (mm²)
380 / 400 50 70 95
Fuse value (A)
380 / 400 50 160 200
Fig. 2.6.2 Electric motor wiring diagram for DV75-90
U2
U1 V1
V2
W1
W2
U1
U2
V1
V2 W2
W1
UVW
Wiring diagram
Delta
Motor terminal
box wiring

15
COMPRAG Screw air compressor DV-Series
3. Start up
3.1 Lifting and carrying
Allliftingshouldbecarriedoutusingaforklifttruckwithacarryingcapacity
suitedtothe compressor.Lifting may becarried outwithloading cranes,
winches and other machinery, using a crossbeam with the right length.
Local safety guidelines for lifting hFVe to be observed.
For transport with a forklift truck, use the rigging holes in the frame. The compressor has slotted
rigging holes with width C – g. 3.1. Move the compressor carefully.
D
H
L
CC
G
A B
Fig. 3.1 Lifting and carrying DV75-90.
A,mm B, mm C, mm L, mm H, mm D, mm G, mm
802 600 176 2550 1880 1260 1400

16 Version 1.2
3.2 Dimensions
1500 1500
1500
1500
1500
1
2
L
D
H
Fig. 3.2 Dimension drawing DV75 – 90.
Model
Compressor dimensions
Length
L, mm
Width
D, mm
Height
H,mm
Weight,
kg
DV75 2550 1260 1880 2200
DV90 2370
Packaging dimensions
DV75 2760 1360 2010 2285
DV90 2455
3.3 Requirements on installation facility
Fig. 3.3 Installation facility proposal DV75 – 90.
1. Air inflow
2. Air outflow
Ensure that the oor of the facility can withstand the weight of the compressor. Install the
compressor on a level surface that is able to bear its weight. Adjust the horizontal axis of the
compressor using a levelling instrument. If the compressor is not anchored to the base on
which it is installed, the tilt angle with respect to the horizontal surface must not exceed 3°.

17
COMPRAG Screw air compressor DV-Series
If the compressor is anchored to the base on which it is installed, the tilt angle with respect to
the horizontal surface must not exceed 7°. Install the compressor in a facility where precip-
itation cannot reach. Choose a facility for installing the compressor with a minimum level of
dust. Install the compressor at least 1,5 m from walls.
If multiple compressors are installed, there should be a 1,5 m minimum distance between
each compressor. There should be a 4 m safety distance from the area of the operated equip-
ment connected to the compressor.
The facility in which the compressor is installed must be
tted with a combined extract-and-input ventilation system.
The facility where the compressor is installed should be provided
with air inow equivalent to twice the compressor’s capacity.
The volume of extraction ventilation must not exceed 40% of the air inow capacity of the input
ventilation in a facility where the compressor is installed and tted with an extract- and input ven-
tilation system.
The compressor should not be installed in a facility where the temperature may drop below +5°С.
In order to extract hot air owing out the compressor, an air duct may be used that is up to 3 m in
length and with a cross section 20% larger than that of the air-outow orice from the compressor’s
radiator. If an air duct longer than 3 m is used, additional duct fans should be used.
3.4 Connection to the compressed airline
Provide the throughput capacity of the compressed-air line in accordance with the perfor-
mance of the compressor. In order to FVoid damage associated with seal failure of the com-
pressed-air line, the compressor should be connected via a exible hose. All components of
the compressed-air line must hFVe a working pressure no less than the compressor’s nominal
pressure. Use a pressure vessel with a capacity corresponding to the compressor’s perfor-
mance and the compressed air consumer.
3.5 Connecting to power supply
The compressor is not supplied with a power cable. The cable size must be chosen to ensure
that the maximum voltage drop not exceed 5 % of the nominal voltage value. Cable length
must not exceed 25 m. Ambient temperature in the facility must not exceed 40°C. The cable
must be sheathed with a re retardant compound. An isolating switch must be tted within
reach of the compressor to facilitate connection and maintenance.

18 Version 1.2
The compressor must be earthed and protected against short cir-
cuits in each phase, impermissible voltage uctuation and phase
failure.
The power cable has to be fed into the compressor.
Fig. 3.5 Power cable connection
Remove the right side panel, pass the cable under the compressor into the orice (1) and
cable glang (2).
The earth wire of the power cable must be connected to the corresponding earthing bolt.
1
2

19
COMPRAG Screw air compressor DV-Series
4. Operation
Non-qualied personnel must not be allowed to operate the com-
pressor.
4.1 Control panel
The frequency-controlled compressors DV30 and DV90 are equipped with an electronic v-Log control.
The electronic v-Log control maintains the network pressure between the programmable limit values by
automatically adjusting the compressor speed. Operating data such as operating times and system
statuses are also recorded.
4.1.1 v-Log control panel
Fig. 4.1.1 v-Log control
panel
Start compressor Up or increase value
Stop compressor Down or reduce value
Back to the main menu Save setting
Accept value / manually switch between loaded and idle running
4.1.2 LCD indicator
Power indicator (red): The indicator lights up when the control is switched on and
the power supply is connected.
Power indicator (green): The indicator lights up when the motor is running.
Alarm/error indicator (red). Alarm (warning): The indicator ashes and the ma-
chine continues to run. Error: The indicator is permanently lit, there is an accom-
panying acoustic signal and the machine switches off. The error message can be
acknowledged after the cause of the error has been resolved. In order to acknowl-
edge the error message, press and hold the ‘back to main menu’ button .

20 Version 1.2
LED indicators.
When switched on, the LCD display shows the following:
COMPRAG SCREW
AIR COMPRESSOR
The main parameters of the compressor are displayed after 5 seconds:
21°C 0.00HZ Oil/air mixture temperature at the
compressor outlet Current motor frequency
0.0BAR 0RPM Pressure at the compressor outlet Current motor speed
STOP Operating status of the compressor
0.00V O.0kW Current mains voltage Current power consumption of the
compressor
Main menu: Click in order to bring up the options menu:
RUN PARAMETERS Includes current values (available for viewing)
USAGE PARAM Includes operating settings of the main parameters (available for viewing,
changes password-protected)
FACTORY PARAM For servicing mode (view with password). Modication only possible by manufacturer
Description of the parameters. Run parameters:
Select the run parameters using the up and down buttons and enter . Current values
are displayed.
FAN, VSD PARAM
TOTAL RUN TIME
THIS RUN TIME
MAINTEN. PARAM
ERRORS HISTORY
MFD, SERIAL NO
THIS ERROR
DESCRIPTION
Run parameters. Select the run parameters using the up and down buttons and enter .
FAN, VSD PARAM
FREQUENCY 50.0 Hz
VOLTAGE 400V
CURRENT:
POWER:
At the output of the frequency inverter.
FAN CURRENT (A)
А: 0.0
В: 0.0
С : 0.0
Current consumption of all 3 phases of the fan.