KTR-Group OPC Series Product guide

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
1 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Oil/air cooler
series
OPC
according to directive 2014/34/EU
Oil/air cooler; example: OPC200 to 400
Oil/air cooler; example: OPC500 to 700
Oil/air cooler; example: OPC800 to 1000

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
2 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
The oil/air cooler series OPC is an efficient high-performance cooler. It has a compact design and was
developed for cooling hydraulic oil, gear oil and lubricating oil.
1Technical data 3
2Advice 6
2.1 General advice 6
2.2 Safety and advice symbols 6
2.3 General hazard warnings 6
2.4 Intended use 7
3Storage, transport and packaging 7
3.1 Storage 7
3.2 Transport and packaging 7
4Assembly 8
4.1 Components of oil/air cooler 8
4.2 Place of installation 9
4.3 Assembly of oil/air cooler 10
4.4 Operating pressure and temperature 10
4.5 Electrical connection 11
4.6 Cooling medium 11
4.7 Cleaning 12
4.8 Standard marking of oil/air cooler 12
4.9 Assembly - disassembly of the oil/air cooler into components 12
5Start-up 13
6Maintenance and service 13
7Spares inventory, customer service addresses 14
8Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres 15
8.1 Intended use in potentially explosive atmospheres 15
8.2 Marking for potentially explosive atmospheres 16
8.3 Start-up for the use in potentially explosive atmospheres 17
8.4 Permissible accessories for the use in potentially explosive atmospheres 18
8.5 EC Certificate of incorporation 19
8.6 EU Certificate of conformity 20
Table of contents

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
3 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Type OPC200 to 400
Illustration 1: OPC200 to 400
Table 1: Dimensions - Type OPC200 to 400
Type of cooler
Voltage
Current
[A]
Speed
[rpm]
l/min.
kW/°C
Dimensions [mm]
A
B
C
D
E
OPC200-4D-0.75kW
230/400V 50 Hz
1.8
1400
5.5
0.12
350
460
572
63
255
OPC200-12D-0.75kW
16.7
0.14
OPC200-16D-0.75kW
21.4
0.15
596
OPC300-4D-0.75kW
5.5
0.20
446
550
615
65
300
OPC300-12D-0.75kW
16.7
0.22
OPC300-16D-0.75kW
21.4
0.24
638
OPC400-4D-0.75kW
5.5
0.24
446
550
645
95
300
OPC400-12D-0.75kW
16.7
0.26
OPC400-16D-0.75kW
21.4
0.28
668
OPC400-32D-0.75kW
42.7
0.34
720
Type of cooler
Dimensions [mm]
Weight
[kg]
F
H
I
J
K
L
M
N
OPC200-4D-0.75kW
115
360
174
530
100
330
426
G ¾“
35
OPC200-12D-0.75kW
OPC200-16D-0.75kW
435
G 1“
OPC300-4D-0.75kW
160
450
200
530
100
330
464
G ¾“
42
OPC300-12D-0.75kW
OPC300-16D-0.75kW
473
G 1“
OPC400-4D-0.75kW
160
450
200
550
75
400
465
G ¾“
46
OPC400-12D-0.75kW
OPC400-16D-0.75kW
474
G 1“
OPC400-32D-0.75kW
SAE
1 ½“
1 Technical data

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
4 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Type OPC500 to 700
Illustration 2: OPC500 to 700
Table 2: Dimensions - Type OPC500 to 700
Type of cooler
Voltage
Current
[A]
Speed
[rpm]
l/min.
kW/°C
Dimensions [mm]
A
B
C
D
E
OPC500-16D-2.2kW
230/400V 50 Hz
4.9
1410
21.5
0.40
460
740
740
94
405
OPC500-25D-2.2kW
33.4
0.48
OPC500-32D-2.2kW
42.7
0.50
790
OPC500-40D-2.2kW
53.5
0.52
OPC600-16D-2.2kW
21.5
0.65
607
840
819
94
455
OPC600-25D-2.2kW
33.4
0.68
OPC600-32D-2.2kW
42.7
0.70
868
OPC600-40D-2.2kW
53.5
0.73
OPC700-40D-2.2kW
4.5
1435
56.0
0.77
608
990
973
530
Type of cooler
Dimensions [mm]
Weight
[kg]
F
G
H
I
J
K
L
M
N
OPC500-16D-2.2kW
150
157.5
657
130
720
30
330.0
547
G 1“
75
OPC500-25D-2.2kW
OPC500-32D-2.2kW
568
SAE
1 ½“
77
OPC500-40D-2.2kW
OPC600-16D-2.2kW
225
226.0
770
280
795
30
367.5
626
G 1“
96
OPC600-25D-2.2kW
OPC600-32D-2.2kW
647
SAE
1 ½“
98
OPC600-40D-2.2kW
OPC700-40D-2.2kW
920
732
130
1 Technical data

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
5 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Type OPC800 to 1000
Illustration 3: OPC800 to 1000
Table 3: Dimensions - Type OPC800 to 1000
Type of cooler
Voltage
Current
[A]
Speed
[rpm]
l/min.
kW/°C
Dimensions [mm]
A
B
C
D
E
OPC800-50D-4kW
400/690V 50Hz
8.2
1460
69
1.00
701
981
1096
140
521
OPC800-80D-4kW
112
1.15
1130
OPC850-80D-5.5kW
12
970
72
1.12
870
1002
1046
95
523
OPC850-100D-5.5kW
113
1.32
1081
OPC850-125D-5.5kW
OPC900-80D-5.5kW
72
1.34
995
1312
1046
678
OPC900-100D-5.5kW
113
1.71
1081
OPC900-125D-5.5kW
OPC1000-125D-5.5kW
113
1.88
1119
113
OPC1000-180D-5.5kW
167
2.33
1136
Type of cooler
Dimensions [mm]
Weight
[kg]
F
G
H
I
J
K
L
M
N
OPC800-50D-4kW
350
340
920
280
670
20
292
829
SAE 2“
112
OPC800-80D-4kW
845
113
OPC850-80D-5.5kW
373
390
910
350
590
180
804
146
OPC850-100D-5.5kW
824
160
OPC850-125D-5.5kW
OPC900-80D-5.5kW
1182
440
615
210
804
SAE 3“
189
OPC900-100D-5.5kW
824
203
OPC900-125D-5.5kW
OPC1000-125D-5.5kW
844
217
OPC1000-180D-5.5kW
854
220
1 Technical data

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
6 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Please read through these operating/assembly instructions carefully before you assemble the oil/air cooler.
Please pay special attention to the safety instructions!
The oil/air cooler is suitable and approved for the use in potentially explosive atmospheres. With the
use in potentially explosive atmospheres please observe the special notes and instructions regarding
safety as per enclosure A.
The operating/assembly instructions are part of your product. Please store them carefully and close to the oil/air
cooler. The copyright for these operating/assembly instructions remains with KTR.
Warning of potentially explosive
atmospheres
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death caused by explosion.
STOP
Warning of personal injury
This symbol indicates notes which may contribute to
preventing bodily injuries or serious bodily injuries that
may result in death.
!
Warning of product damages
This symbol indicates notes which may contribute to
preventing material or machine damage.

General advice
This symbol indicates notes which may contribute to
preventing adverse results or conditions.
Warning of hot surfaces
This symbol indicates notes which may contribute to
preventing burns with hot surfaces resulting in light to
serious bodily injuries.
STOP
With assembly and disassembly of the oil/air cooler it has to be made sure that the entire
drive train is secured against accidental switch-on. You may be seriously hurt by rotating
parts. Please make absolutely sure to read through and observe the following safety
indications.
•All operations on and with the oil/air cooler have to be performed taking into account "safety first".
•Please make sure to switch off the power pack before you perform your work on the oil/air cooler.
•Secure the power pack against accidental switch-on, e. g. by providing warning signs at the place of switch-on
or removing the fuse for current supply.
•Do not reach into the operation area of the machine as long as it is in operation.
•Please secure the rotating drive components against accidental contact. Please provide for the necessary
protection devices and covers.
2 Advice
2.1 General advice
2.2 Safety and advice symbols
2.3 General hazard warnings

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
7 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
You may only assemble and disassemble the oil/air cooler if you
•have carefully read through the operating/assembly instructions and understood them
•are technically qualified and specifically trained (e. g. safety, environment, logistics)
•are authorized by your company
The oil/air cooler may only be used in accordance with the technical data (see chapter 1). Unauthorized
modifications on the oil/air cooler are not admissible. We will not assume liability for any damage that may arise.
In the interest of further development we reserve the right for technical modifications.
The oil/air cooler series OPC described in here corresponds to the technical status at the time of printing of
these operating/assembly instructions.
The oil/air coolers are supplied in preserved condition and with painting and can be stored at a dry and roofed
place for 6 - 9 months.
!
The storage rooms must not include any ozone-generating devices like e. g. fluorescent
light sources, mercury-vapour lamps or electrical high-voltage appliances.
Humid storage rooms are not suitable.
Please make sure that condensation is not generated. The best relative air humidity is less
than 65 %.
!
In order to avoid any injuries and any kind of damage please always make use of proper
transport and lifting equipment.
The oil/air coolers are packed differently each depending on size, number and kind of transport. Unless otherwise
contractually agreed, packaging will follow the in-house packaging specifications of KTR.
2 Advice
2.4 Intended use
3 Storage, transport and packaging
3.1 Storage
3.2 Transport and packaging

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
8 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
The oil/air cooler series OPC is supplied ready for assembly.
Component
Quantity
Description
1
1
Oil/air cooler „Type OPC“
Illustration 4: Oil/air cooler; example: OPC200 to 400
Illustration 5: Oil/air cooler; example: OPC500 to 700
Illustration 6: Oil/air cooler; example: OPC800 to 1000
4 Assembly
4.1 Components of oil/air cooler

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
9 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Illustration 7: Oil/air cooler; example: OPC200 to 400
Illustration 8: Oil/air cooler; example: OPC500 to 1000
In order to achieve the optimum cooling capacity the distance to the nearest wall should not fall below the height
of the cooling element (dimension A), since only in this way a proper air supply is ensured (see illustration 7 and
8).

The height of installation should not exceed the figure ≤ 1000 m.
!
Return flow of heated air as well as assembly of the cooler core in front of heat sources
should be avoided.
!
The engines have to be protected from direct solar radiation.

An unfavourable place of installation may increase the noise level by reflection of sound.
4 Assembly
4.2 Place of installation

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
10 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
The oil/air cooler can be assembled in various positions,
while the vertical design should be preferred. Sufficient
fastening has to be assured.

Some motors have got covered holes which
serve for draining off condensed water
which may be generated.
Please use proper hydraulic hoses to connect the oil/air
cooler. These are connected on the discharge side of the
cooling element (see illustration 9).

Make sure that the connections and hoses
are adapted to the oil/air cooler with regard
to pressure, flow rate, temperature and
liquidity.
Illustration 9: Oil/air cooler; example: OPC200 to 1000
With the use in potentially explosive atmospheres only those hydraulic hoses which comply
with the specifications of the overall approval of the machine may be used.
Motor and pump are supplied by KTR ready for use. With the inspection of the ROTEX®coupling (see
KTR-N 40210) disassembly or assembly of the bellhousing has to be performed in accordance with
KTR-N 41010.
The maximum static operating pressure must not exceed the load of 26 bar during operation. With sizes OPC850
to OPC1000 the maximum static operating pressure is reduced to 21 bar.
!
With dynamic load maximum torque peaks of 14 bar must not be exceeded.
The maximum permissible temperature of the medium to be cooled must not exceed +80 °C
(standard arrangement). Please consult with KTR for any higher temperatures.

The temperature of the ambiance and the medium to be cooled should not change rapidly.
Please note boiling and freezing point.
4 Assembly
4.3 Assembly of oil/air cooler
4.4 Operating pressure and temperature

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
11 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Before connecting the motor to the power supply
compare the specifications in the type label (see
illustration 11 or 12) of the motor to the voltage, fuse and
frequency of the mains.
Illustration 10: Torsional direction - fan
With the use in potentially explosive
atmospheres only electric motors and
pumps with ATEX approval may be
used.
The torsional direction of the fan and the air flow have to
comply with the arrows specified on the oil/air cooler (see
illustration 10).

The electric motors may only be connected
to the electric supply by qualified personnel.
Please observe the universal specifications
and electrical safety regulations!
!
Incorrect connections, damaged cables etc. may energize the components connected or
make the electric motor rotate in the wrong direction.
The cooler has a separate grounding connection. It has to be connected to the grounding of
the machine.

Please observe the operating instructions of the electric motor used by you.

Please observe the operating instructions of the pump used by you.

We recommend to use an overload protection for the electric motor.
The oil/air cooler is suitable for the use of mineral oil, synthetic oil and water glycol.
4 Assembly
4.5 Electrical connection
4.6 Cooling medium

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
12 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
STOP
Before cleaning make sure that the oil/air cooler has cooled down.
Touching the heated components causes burns.
!
With cleaning processes, e. g. with water, disconnect the cooler from the main power
supply. The protection class needs to be observed.
Side of air fins
The air fins can be cleaned with compressed air. If seriously soiled, cleaning should be done by means of a high-
pressure cleaner and degreasing agent. The jet should be kept carefully and in parallel with the air fin.
Oil side of cooling element
The oil side of the cooling element is cleaned by flushing with a degreasing agent.
Afterwards flush with the fluid/medium which is used later.
The oil/air cooler of series OPC is marked as follows:
Illustration 11:
Examples - type plates
The cooler is assembled by KTR. The oil/air cooler is supplied ready for use.
A repair of the cooler by the plant operator/an external fitter is only permissible after written authorization by KTR.
With an interim storage the oil/air cooler needs to be protected against environmental impacts (moisture, solar
radiation, etc.) as well as excessive dust exposure.
4 Assembly
4.7 Cleaning
4.8 Standard marking of oil/air cooler
4.9 Assembly - disassembly of the oil/air cooler into components

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
13 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Please make sure that the oil/air cooler is properly connected and fastened.
A grounding cable has to be connected to the oil/air cooler in the position marked (on the
yellow grounding symbol).
Please observe the following procedure:
•Flush the oil/air cooler with the same liquid/medium as the other systems.
•Filter the liquid/medium after flushing.
•Vent the cooling element after filling (see illustration 9).
•The oil/air cooler and the protective grid have to be free from damage.
•The fan needs to rotate freely. The minimum gap (as per chapter 8.3) for fixed components needs to be
observed.
•Hydraulic connections have to be tightened.
•The inside of the fan housing has to be free from any objects.
STOP
Components which are hurled may cause personal injuries, damage other components or
generate sparking.
Preventive maintenance operations have to be regularly performed by the user.
The following items have to be reviewed:
•Unusual noise or vibrations must not be generated.
!
With vibrations inspect the screw connection of motor and pump.
If the damage has not been repaired in this way, please consult with KTR.
!
During operation please pay attention to changes in operating noise of the ROTEX®
coupling.
•Proper fastening of the oil/air cooler has to be assured.
•Impurity of the oil/air cooler reduces the cooling power, make sure to clean your cooler (see item cleaning).
•Inspect the oil/air cooler for damages, defective components have to be replaced.
•Inspect the cooler core, the pump and the screw connection on the pipeline for leakages.
!
Leakages have to be eliminated immediately.
Oil which has escaped has to be removed properly, since oil residues may vaporize on hot
components and ignite.
5 Start-up
6 Maintenance and service

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
14 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
•Inspect distances between fan and protective grid (see chapter 8.3).
•Inspect the individual components of the device for electrically conductive connections (including the
grounding cable connection).
•The motor temperature has to be inspected with the device operating.

It must not exceed the temperature class specified in the type label (see illustration 12).
•The bearings of the motors are permanently lubricated.

Re-lubrication is not possible. Please observe the service life of the motor bearing as per
the data sheet of the motor manufacturer.
The bearings must be inspected, maintained and replaced, if necessary, as per the
specifications of the motor manufacturer.
We recommend to store major spare parts on site to ensure the readiness for use of the machine in case if a
cooler fails.
Contact addresses of the KTR partners for spare parts and orders can be obtained from the KTR homepage at
www.ktr.com.

KTR does not assume any liability or warranty for the use of spare parts and accessories
which are not provided by KTR and for the damages which may incur as a result.
6 Maintenance and service
7 Spares inventory, customer service addresses

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
15 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Sizes: OPC200 to OPC1000
Conditions of operation in potentially explosive atmospheres
The oil/air coolers are suitable for the use according to EU directive 2014/34/EU.
Industry (with the exception of mining)
•Equipment group II of category 2 and 3 (oil/air cooler is not approved/not suitable for equipment group 1)
•Media class G (gases, mist, vapours), zone 1 and 2 (oil/air cooler is not approved/not suitable for zone 0)
•Media class D (dusts), zone 22 (oil/air coolers are not approved/not suitable for zones 20 and 21).
•Explosion group IIC (explosion class IIA and IIB are included in IIC)
Temperature class:
Temperature class
max. perm. medium temperature
T3
≤ +80 °C
(including gases and vapours of temperature classes T2 and T1)
T4
≤ +80 °C
T5
≤ +80 °C
T6
≤ +68 °C
Explanation:
•The permissible ambient temperature Tafor the use of oil/air coolers is intended from -20 °C to +55 °C.
•Subject to the operation the medium temperature may be considerably higher than the ambient temperature.
•The component with the lowest temperature class is decisive for the operation.
In potentially explosive atmospheres
•the ignition temperature of dusts generated must at least be 1.5 times the surface temperature to be
considered
•the glow temperature must at least be the surface temperature to be considered plus a safety distance of 75 K.
•the gases and vapours generated must amount to the temperature class specified.
8 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres
8.1 Intended use in potentially explosive atmospheres

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
16 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
The ATEX marking of the oil/air coolers series OPC is made on one component.
For the complete marking refer to the operating/assembly instructions.
Marking is as follows:
Oil/air coolers OPC
<Year>
II
2G
Ex
h
IIC
T6
…
T3
Gb
II
3D
Ex
h
IIIC
T68 °C
…
T110 °C
Dc
-20 °C ≤ Ta≤
+55 °C
KTR Systems GmbH, Carl-Zeiss-Straße 25, D-48432 Rheine
Illustration 12:
Examples - type plates
Short marking:
(A short marking is only made if not possible differently for reason of space or functioning.)
Oil/air coolers OPC
<Year>
Deviating marking applies until 31st October 2019:
Short marking:
II 2G c IIB T X
Illustration 13:
Examples - type plates
8 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres
8.2 Marking for potentially explosive atmospheres

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
17 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
Substance group - gases, mist and vapours:
The marking with explosion group llC includes the explosion groups llA and llB.
Substance group - dusts:
The marking with explosion group lIlC includes the explosion groups lIlA and lIlB.
!
The oil/air cooler may only be used in the locations marked in the type label of the oil/air
cooler and motor and pump. The element with the least favourable class is decisive.
The decision of assessment of the place of operation is subject to the user.

The start-up of the coolers is permissible by qualified personnel only.
•It has to be made sure that oil supply and discharge are properly connected.
•The connections as well as the cooling element and pump have to be tested for leakages after start-up.
•The electric motor is to be connected such that the torsional direction marked on the oil/air cooler is observed
as described in Electrical connection.
•The cooler has to be grounded separately in the place marked (equipotential bonding of cooler).
•Inspect the oil motor for leakages.
!
Leakages have to be eliminated immediately.
Oil which has escaped has to be removed properly, since oil residues may vaporize on hot
components and ignite.
•When the motor is running vibrations and unusual noise (frictional noise, squeaking, etc.) must not arise.
!
With vibrations inspect the screw connection of motor and pump.
If the damage has not been repaired, the oil/air cooler must not be operated any longer.
Please consult with KTR.
!
During operation please pay attention to changes in the operating noise of the ROTEX®
coupling.
8 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres
8.2 Marking for potentially explosive atmospheres
8.3 Start-up for the use in potentially explosive atmospheres

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
18 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
•The oil/air cooler may be set up horizontally only and must be screwed to the base through all fastening holes.
•It has to be assured that the suction distances and discharge distances (distance A, as described in place of
arrangement) are observed.
•The cooler core must not be sealed by foreign substances.
•Inspect distances between fan and protective grid.

The minimum gap width between rotating components and non-mobile components is at
least 1 % of the relevant contact diameter (see table 4).
Table 4
Size of cooler
Fan Ø
[mm]
Minimum gap to be observed
OPC200
280
> 2.8 mm (corresponds to 1 %)
OPC300 to OPC500
380
> 3.8 mm (corresponds to 1 %)
OPC600 to OPC700
520
> 5.2 mm (corresponds to 1 %)
OPC800
630
> 6.3 mm (corresponds to 1 %)
OPC850
750
> 7.5 mm (corresponds to 1 %)
OPC900 to OPC1000
900
> 9.0 mm (corresponds to 1 %)
•With the trial run make sure that the permissible motor temperature is not exceeded.
The temperature classes of cooler and motor specified in the type label have to be definitely observed.
Only those accessories certified by ATEX and complying with the temperature class (example: thermal switch,
etc.) may be mounted to the oil/air cooler.
Any modifications on the design of the oil/air cooler intended for the use in potentially
explosive atmospheres are not permissible.
!
The customer bears the sole responsibility for all machining processes performed
subsequently by the customer. KTR does not assume any warranty claims.
8 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres
8.3 Start-up for the use in potentially explosive atmospheres
8.4 Permissible accessories for the use in potentially explosive atmospheres

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
19 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
EC Certificate of incorporation
according to EC machinery directive 2006/42/EC dated May 17, 2006, annex II B
The manufacturer - KTR Systems GmbH, D-48432 Rheine - states that the
Oil/air cooler - OPC
is an incomplete machine complying with the Machinery Directive 2006/42/EC. The oil/air cooler is
exclusively intended for installation in a machine so that it does not comply with all specifications of the
Machinery Directive. It is forbidden to start up the oil/air cooler as long as it is stated that the machine
which the oil/air cooler is installed in complies with all basic specifications of the Machinery Directive
2006/42/EC.
The oil/air cooler complies with the specifications of the following standards/rules:
2006/42/EC Machinery Directive (MD)
2014/30/EU Directive for electromagnetic compatibility (EMC directive)
2014/35/EU Low-voltage directive (LVD)
2014/68/EU Directive for Pressure Equipment (PED)
DIN EN ISO 12100 Safety of machines
Rheine,
2019-10-23
i. V.
Place
Date
Christoph Bettmer
Product Manager
8 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres
8.5 EC Certificate of incorporation

Oil/air cooler
Series OPC
Operating/Assembly instructions
KTR-N
Sheet:
Edition:
43211 EN
20 of 20
5
Please observe protection
note ISO 16016.
Drawn:
2019-10-23 Pz/Str
Replacing:
KTR-N dated 2017-01-02
Verified:
2019-11-04 Pz
Replaced by:
EU Certificate of conformity
corresponding to EU directive 2014/34/EU dated 26 February 2014 and to the legal regulations
The manufacturer - KTR Systems GmbH, D-48432 Rheine - states that the
Oil/air coolers - OPC
in an explosion-proof design described in these operating/assembly instructions are devices
corresponding to article 2, 1. of directive 2014/34/EU and comply with the general safety and health
requirements according to enclosure II of directive 2014/34/EU.
The oil/air cooler described in here complies with the specifications of the following standards/rules:
DIN EN ISO 80079-36
DIN EN ISO 80079-37
IEC/TS 60079-32-1
DIN EN 14986
The oil/air cooler complies with the specifications of the directive 2014/34/EU.
According to article 13 (1) b) ii) of directive 2014/34/EU the technical documentation is deposited with
the notified body (type examination certificate IBExU10ATEXB011 X):
IBExU
Institut für Sicherheitstechnik GmbH
Identification number: 0637
Fuchsmühlenweg 7
09599 Freiberg
Rheine,
2019-10-23
i. V.
Place
Date
Christoph Bettmer
Product Manager
8 Enclosure A
Advice and instructions regarding the use in potentially explosive atmospheres
8.6 EU Certificate of conformity