BUSCH R 5 series User manual

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Instruction Manual
R5
Oil-Lubricated Rotary Vane Vacuum Pumps
RA 1000 B, RA 1600 B
RC 1000 B, RC 1600 B
0870569784/-0007_en / Original instructions / Modifications reserved 11/08/2021

Table of Contents
2 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
Table of Contents
1 Safety .......................................................................................................................................4
2 Product Description ..................................................................................................................5
2.1 Operating Principle .......................................................................................................... 6
2.2 Application....................................................................................................................... 6
2.3 Start Controls ................................................................................................................... 6
2.4 Standard Accessories ........................................................................................................ 6
2.4.1 Temperature Switch "Gas".................................................................................... 6
2.4.2 Level Switch .......................................................................................................... 7
2.4.3 Temperature Switch "Oil".....................................................................................7
2.5 Optional Accessories ........................................................................................................ 7
2.5.1 Gas Ballast Valve ................................................................................................... 7
2.5.2 Inlet Filter ..............................................................................................................7
2.5.3 Water-oil Heat Exchanger ..................................................................................... 7
2.5.4 Resistance Thermometer ....................................................................................... 7
2.5.5 Pressure Switch ..................................................................................................... 7
2.5.6 Pressure Transmitter ..............................................................................................7
2.5.7 Variable Frequency Drive....................................................................................... 8
3 Transport ..................................................................................................................................9
4 Storage .....................................................................................................................................10
5 Installation................................................................................................................................10
5.1 Installation Conditions...................................................................................................... 10
5.2 Connecting Lines / Pipes .................................................................................................. 11
5.2.1 Suction Connection ............................................................................................... 11
5.2.2 Discharge Connection ........................................................................................... 12
5.2.3 Cooling Water Connection (Optional) ................................................................... 12
5.3 Filling Oil.......................................................................................................................... 14
5.4 Fitting the Coupling ......................................................................................................... 14
5.5 Electrical Connection ........................................................................................................ 15
5.5.1 Machine delivered without Control Box or Variable Frequency Drive (VFD)........... 16
5.5.2 Machine delivered with a Control Box (Option)..................................................... 16
5.5.3 Machine delivered with a Variable Frequency Drive (Option) ................................ 17
5.5.4 Wiring Diagram Three-Phase Motor...................................................................... 18
5.6 Electrical Connection of the Monitoring Devices............................................................... 19
5.6.1 Wiring Diagram Temperature Switch "Gas" .......................................................... 19
5.6.2 Wiring Diagram Temperature Switch "Oil" ........................................................... 19
5.6.3 Wiring Diagram Level Switch................................................................................. 19
5.6.4 Wiring Diagram Resistance Thermometer (Optional)............................................. 20
5.6.5 Wiring Diagram Pressure Switch (Optional)........................................................... 20
5.6.6 Wiring Diagram Inlet Pressure Transmitter (Optional)............................................ 20
5.6.7 Wiring Diagram Outlet Pressure Transmitter (Optional)......................................... 20
5.6.8 Wiring Diagram Pressure Switch of Water-oil Heat Exchanger (Optional).............. 20
6 Commissioning.........................................................................................................................21
6.1 Conveying Condensable Vapours..................................................................................... 21
7 Maintenance.............................................................................................................................23
7.1 Maintenance Schedule ..................................................................................................... 24
7.2 Oil Level Inspection.......................................................................................................... 25
7.3 Oil and Oil Filter Change.................................................................................................. 25
7.4 Exhaust Filter Change....................................................................................................... 27
7.5 Air Heat Exchanger Cleaning............................................................................................ 28

Table of Contents
Instruction Manual R5 RA RC 1000-1600 B_EN_en 3
8 Overhaul...................................................................................................................................28
9 Decommissioning.....................................................................................................................29
9.1 Dismantling and Disposal ................................................................................................. 29
10 Spare Parts................................................................................................................................29
11 Troubleshooting .......................................................................................................................30
12 Technical Data..........................................................................................................................32
13 Oil ............................................................................................................................................33
14 EU Declaration of Conformity...................................................................................................34
15 UK Declaration of Conformity ..................................................................................................35

1 | Safety
4 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
1 Safety
Prior to handling the machine, this instruction manual should be read and understood. If
anything needs to be clarified, please contact your Busch representative.
Read this manual carefully before use and keep for future reference.
This instruction manual remains valid as long as the customer does not change anything
on the product.
The machine is intended for industrial use. It must be handled only by technically trained
personnel.
Always wear appropriate personal protective equipment in accordance with the local
regulations.
The machine has been designed and manufactured according to state-of-the-art meth-
ods. Nevertheless, residual risks may remain. This instruction manual highlights potential
hazards where appropriate. Safety notes and warning messages are tagged with one of
the keywords DANGER, WARNING, CAUTION, NOTICE and NOTE as follows:
DANGER
... indicates an imminent dangerous situation that will result in death or serious injuries if
not prevented.
WARNING
... indicates a potentially dangerous situation that could result in death or serious injuries.
CAUTION
... indicates a potentially dangerous situation that could result in minor injuries.
NOTICE
... indicates a potentially dangerous situation that could result in damage to property.
NOTE
... indicates helpful tips and recommendations, as well as information for efficient and
trouble-free operation.

Product Description | 2
Instruction Manual R5 RA RC 1000-1600 B_EN_en 5 / 36
2 Product Description
OFPNP EB IN GB 2 OUT 1 AHE
DAMTBOSGODPOF
EF
FMLS
FM GB 1EF
OUT 2
TS 2TS 1
OS
FV
TS 3
IN Suction connection MTB Motor terminal box
OUT Discharge connection DA Directional arrow
OFP Oil fill plug EF Exhaust filter
OSG Oil sight glass NP Nameplate
ODP Oil drain plug OF Oil filter
EB Eye bolt OS Oil separator
GB Gas ballast valve FM Filter material
AHE Air-oil heat exchanger FV Float valve (on RA version only)
TS Temperature switch LS Level switch
NOTE
Technical term.
In this instruction manual, we consider that the term ‘machine’ refers to the ‘vacuum
pump’.
NOTE
Illustrations
In this instruction manual the illustrations may differ from the machine appearance.

2 | Product Description
6 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
2.1 Operating Principle
The machine works on the rotary vane principle.
The oil seals the gaps, lubricates the vanes and takes away compression heat.
The oil filter cleans the circulating oil.
Exhaust filters separate the oil from the discharged gas.
2.2 Application
The machine is intended for the suction of air and other dry, non-aggressive, non-toxic
and non-explosive gases.
Conveying of other media leads to an increased thermal and/or mechanical load on the
machine and is permissible only after a consultation with Busch.
The machine is intended for the placement in a non-potentially explosive environment.
The machine is designed for indoor installation, in case of outdoor installation, ask your
Busch representative in order to take specific precautions.
The machine is capable of maintaining ultimate pressure, see Technical Data [►32].
The machine is suitable for continuous operation.
Permitted environmental conditions, see Technical Data [►32].
2.3 Start Controls
NOTE
To start the machine, Busch recommends the installation of starter devices such as
soft-starters or variable-frequency drives.
The machine comes without start controls. The control of the machine is to be provided
in the course of installation.
The machine can be optionally equipped with a starter unit or a variable-frequency drive.
2.4 Standard Accessories
2.4.1 Temperature Switch "Gas"
The temperature switch “Gas” monitors the gas temperature of the machine.
The machine must be stopped when the gas reaches 110 °C.

Product Description | 2
Instruction Manual R5 RA RC 1000-1600 B_EN_en 7 / 36
2.4.2 Level Switch
The level switch monitors the oil level.
The machine must be stopped when the oil level is too low.
2.4.3 Temperature Switch "Oil"
The temperature switch monitors the oil temperature of the machine.
It has two switch points.
Depending on the oil type, the machine must be stopped when the oil reaches a certain
temperature, see Oil [►33].
2.5 Optional Accessories
2.5.1 Gas Ballast Valve
The gas ballast valve mixes the process gas with a limited quantity of ambient air to
counteract the condensation of vapour inside the machine.
The gas ballast valve has an influence on the ultimate pressure of the machine, see Tech-
nical Data [►32].
2.5.2 Inlet Filter
The inlet filter protects the machine against dust and other solids in the process gas. The
inlet filter is available with a paper or polyester cartridge.
2.5.3 Water-oil Heat Exchanger
In case of unfavourable ambient conditions a water-oil heat exchanger can be provided.
See Cooling Water Connection (Optional) [►12].
2.5.4 Resistance Thermometer
The resistance thermometer monitors the oil temperature of the machine.
Depending on the oil type, warning and trip signals must be set, see Oil [►33].
2.5.5 Pressure Switch
The pressure switch monitors the pressure in the oil separator.
The machine must be stopped when the gas reaches a certain pressure, see Wiring Dia-
gram Pressure Switch (Optional) [►20].
2.5.6 Pressure Transmitter
The pressure transmitter monitors the pressure in the oil separator.
Warning and trip signals must be set, see Wiring Diagram Pressure Transmitter (Op-
tional).

2 | Product Description
8 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
2.5.7 Variable Frequency Drive
The machine can optionally be equipped with a Variable Frequency Drive (VFD). A Vari-
able Frequency Drive increases the pumping speed of the machine and saves energy. For
more information contact your Busch representative.

Transport | 3
Instruction Manual R5 RA RC 1000-1600 B_EN_en 9 / 36
3 Transport
WARNING
Suspended load.
Risk of severe injury!
• Do not walk, stand or work under suspended loads.
WARNING
Lifting the machine using the motor eye bolt.
Risk of severe injury!
• Do not lift the machine using the eye bolt fitted to the motor. Only lift the machine as
shown.
NOTICE
In case the machine is already filled with oil.
Tilting a machine that is already filled with oil can cause large quantities of oil to in-
gress into the cylinder. Starting the machine with excessive quantities of oil in the
cylinder will immediately break the vanes and ruin the machine!
• Drain the oil prior to every transport or always horizontally transport the machine.
• Make sure that the eyebolt(s) (EB) is/are in faultless condition, fully screwed in and
tightened by hand.
Machine weight:
see the technical data or the nameplate (NP)
• Check the machine for transport damage.
If the machine is secured to a base plate:
• Remove the machine from the base plate.

4 | Storage
10 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
4 Storage
• Seal all apertures with adhesive tape or reuse provided caps.
Version with water-oil heat exchanger:
• Make sure that the cooling water has been completely removed, see Decommis-
sioning [►29].
If the machine is equipped with a variable-frequency drive:
NOTICE
Long storage time.
Risk of damage to the machine!
• Due to a long storage time the capacitors of the variable-frequency drive can lose effi-
ciency because of electrochemical processes. In the worst case, it can lead to a short-
circuit and therefore to a damage to the variable-frequency drive of the machine.
• Connect the machine every 18 months for 60 minutes to the mains.
If the machine is to be stored for more than 3 months:
• Wrap the machine in a corrosion inhibiting film.
• Store the machine indoors, dry, dust free and if possible in original packaging
preferably at temperatures between 0 ... 40 °C.
5 Installation
5.1 Installation Conditions
NOTICE
Use of the machine outside of the permitted installation conditions.
Risk of premature failure!
Loss of efficiency!
• Take care that the installation conditions are fully complied with.
~50 cm
~50 cm
~100 cm
~100 cm
• Make sure that the environment of the machine is not potentially explosive.
• Make sure that the ambient conditions comply with the Technical Data [►32].
• Make sure that the environmental conditions comply with the protection class of the
motor and the electrical instruments.

Installation | 5
Instruction Manual R5 RA RC 1000-1600 B_EN_en 11 / 36
• Make sure that the installation space or location is vented such that sufficient cooling
of the machine is provided.
• Make sure that cooling air inlets and outlets are not covered or obstructed and that
the cooling air flow is not affected adversely in any other way.
• Make sure that the oil sight glass (OSG) remains easily visible.
• Make sure that enough space remains for maintenance work.
• Make sure that the machine is placed or mounted horizontally, a maximum of 1° in
any direction is acceptable.
• Check the oil level, see Oil Level Inspection [►25].
• Make sure that all provided covers, guards, hoods, etc. are mounted.
Version with water-oil heat exchanger:
• Make sure that the cooling water complies with the requirements, see Cooling
Water Connection (Optional) [►12].
If the machine is installed at an altitude greater than 1000 meters above sea level:
• Contact your Busch representative, the motor should be derated or the ambient
temperature limited.
If the machine is equipped with monitoring devices or sensors:
• Make sure that the monitoring devices are correctly connected and integrated into
a control system such that operation of the machine will be inhibited if the safety
limit values are exceeded, see Electrical Connection of the Monitoring Devices
[►19].
5.2 Connecting Lines / Pipes
• Remove all protective covers before installation.
• Make sure that the connection lines cause no stress on the machine‘s connection; if
necessary use flexible joints.
• Make sure that the line size of the connection lines over the entire length is at least as
large as the connections of the machine.
In case of long connection lines it is advisable to use larger line sizes in order to avoid a
loss of efficiency. Seek advice from your Busch representative.
5.2.1 Suction Connection
WARNING
Unprotected suction connection.
Risk of severe injury!
• Do not put hand or fingers in the suction connection.
NOTICE
Ingress of foreign objects or liquids.
Risk of damage to the machine!
If the inlet gas contains dust or other foreign solid particles:
• Install a suitable filter (5micron or less) upstream from the machine.
Connection size(s):
– DN150 PN16, EN 1092-1

5 | Installation
12 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
Depending on the specific order, other connection dimensions may apply.
If the machine is used as part of a vacuum system:
• Busch recommends the installation of an isolation valve in order to prevent the oil
from flowing back to the vacuum system.
5.2.2 Discharge Connection
CAUTION
The discharge gas contains small quantities of oil.
Risk to health!
If air is discharged into rooms where persons are present:
• Make sure that sufficient ventilation is provided.
Connection size(s):
– DN125 PN16, EN 1092-1
Depending on the specific order, other connection dimensions may apply.
• Make sure that the discharged gas will flow without obstruction. Do not shut off or
throttle the discharge line or use it as a pressurised air source.
Unless the aspirated air is discharged to the environment right at the machine:
• Make sure that the discharge line either slopes away from the machine or provide a li-
quid separator or a siphon with a drain cock, so that no liquids can flow back into the
machine.
5.2.3 Cooling Water Connection (Optional)
Water-oil heat exchanger without inlet accessories WHE CWO CWI
CWO TV PS
MV WF CWIWHE
Water-oil heat exchanger with inlet accessories WBV
CWI Cooling water inlet PS Pressure switch
CWO Cooling water outlet WBV Water bypass valve
WHE Water-oil heat exchanger WF Water filter
TV Thermostatic valve MV Solenoid valve
The thermostatic valve (TV) is used to control the water flow in order to keep a stable
machine temperature.

Installation | 5
Instruction Manual R5 RA RC 1000-1600 B_EN_en 13 / 36
The factory default adjustment of the thermostatic valve (TV) is set in position 2 (approx.
75°C oil temperature).
The pressure switch (PS) is used to monitor the presence of water at the cooling system
of the machine.
When the pressure switch detects a pressure lower than 2 bar, the machine must be
stopped.
The water bypass valve (WBV) is used at the first machine start-up. At that moment it
should be open (approx. 90 seconds) to prime the water heat exchanger, afterwards it
should be closed.
The solenoid valve (MV) is used to stop the cooling water circulation when the machine
is not running.
• Connect the cooling water connections (CWI / CWO) to the water supply.
Connection size:
– 19 mm hose (CWI / CWO)
• If necessary, electrically connect the pressure switch (PS), see Wiring Diagram Pres-
sure Switch of Water-oil Heat Exchanger (Optional) [►20].
• If necessary, electrically connect the solenoid valve (MV).
• Make sure that the cooling water complies with the following requirements:
Min. supply capacity l/min 8
Water pressure bar 2 ... 6
Supply temperature °C +5 ... +35
Required pressure differential across supply
and return
bar ≥ 1
• To reduce the maintenance effort and ensure a long product lifetime we recommend
the following cooling water quality:
Hardness mg/l (ppm) < 90
Properties Clean & clear
PH value 7 ... 8
Particle size µm < 200
Chloride mg/l < 100
Electrical conductivity µS/cm ≤ 100
Free chloride mg/l < 0.3
Materials in contact with the cooling water Stainless steel, copper and cast iron
NOTE
Water hardness unit conversion.
1 mg/l (ppm) = 0.056 °dh (german degree) = 0.07 °e (english degree) = 0.1 °fH (french
degree)

5 | Installation
14 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
5.3 Filling Oil
NOTICE
Use of an inappropriate oil.
Risk of premature failure!
Loss of efficiency!
• Only use an oil type which has previously been approved and recommended by
Busch.
For oil type and oil capacity see Technical Data [►32] and Oil [►33].
1
4
MAX
3
Busch Oil
2
Check oil level
5.4 Fitting the Coupling
E
L
Coupling hub (machine side) Coupling hub (motor side)Coupling sleeve
Radial screw
Max. admissible
torque: 17 Nm

Installation | 5
Instruction Manual R5 RA RC 1000-1600 B_EN_en 15 / 36
Machine type Coupling size Value “E” (mm) Value “L” (mm)
RA/RC 1000 B BoWex® I-80 6 186
POLY PKZ 17 4 144
POLY PKZ 20 4 164
RA/RC 1600 B BoWex® I-80 6 186
POLY PKZ 20 4 164
In case of a machine delivery without motor:
• Fit the second coupling hub on the motor shaft (separately delivered).
• Axially adjust the sleeve in such a way until value "E" (or “L”) is reached.
• When the coupling adjustment is done, lock the coupling hub by tightening the
radial screw.
• Mount the motor on the machine by including the coupling sleeve.
For further coupling information, go to www.ktr.com and download the instruction
manual of the BoWex® or POLY PKZ coupling.
5.5 Electrical Connection
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.
CURRENT PROTECTION OF THE CUSTOMER INSTALLATION:
DANGER
Missing current protection.
Risk of electrical shock.
• Current protection according to EN 60204-1 has to be insured by customer on its in-
stallation.
• The electrical installation must comply with applicable national and international
standards.
NOTICE
Electromagnetic compatibility.
• Make sure that the motor of the machine will not be affected by electric or electro-
magnetic disturbance from the mains, if necessary seek advice from Busch.
• Make sure that the EMC of the machine is compliant with the requirements of your
supply network system, if necessary provide further interference suppression (EMC of
the machine, see EU Declaration of Conformity [►34] or UK Declaration of Con-
formity [►35]).

5 | Installation
16 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
5.5.1 Machine delivered without Control Box or Variable
Frequency Drive (VFD)
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.
NOTE
The operation with variable speed, i.e. with a variable-frequency drive or a soft starter
unit, is allowed as long as the motor is admitted and the permitted motor speed range is
neither underrun nor exceeded (see Technical Data [►32]).
Seek advice from your Busch representative.
• Make sure that the power supply for the motor is compatible with the data on the
nameplate of the motor.
• If the machine is equipped with a power connector, install a residual current protective
device to protect persons in case of isolation default.
• Busch recommends installing a type B residual protective device and adapted to
the electrical installation.
• Provide a lockable disconnect switch or an emergency stop switch on the power line
so that the machine is completely secured in case of an emergency situation.
• Provide a lockable disconnect switch on the power line so that the machine is com-
pletely secured during maintenance tasks.
• Provide an overload protection according to EN 60204-1 for the motor.
• Busch recommends installing a D-curve circuit breaker.
• Connect the protective earth conductor.
• Electrically connect the motor.
NOTICE
Incorrect connection.
Risk of damage to the motor!
• The wiring diagrams given below are typical. Check the inside of the terminal box for
motor connection instructions/diagrams.
5.5.2 Machine delivered with a Control Box (Option)
DANGER
Live wires.
Risk of electrical shock.
• Electrical installation work must only be executed by qualified personnel.
• Make sure that the power supply for the motor is compatible with the data on the
nameplate of the control box.
• If the machine is equipped with a power connector, install a residual current protective
device to protect persons in case of isolation default.

Installation | 5
Instruction Manual R5 RA RC 1000-1600 B_EN_en 17 / 36
• Busch recommends installing a type B residual protective device and adapted to
the electrical installation.
• If the control box is not equipped with a lockable disconnect switch, provide it on the
power line so that the machine is completely secured during maintenance tasks.
• Provide an overload protection according to EN 60204-1.
• Busch recommends installing a D-curve circuit breaker.
• In case of a soft start, Busch recommends installing a C-curve circuit breaker.
• Connect the protective earth conductor.
• Electrically connect the control box.
NOTICE
Incorrect connection.
Risk of damage to the control box and motor!
• The wiring diagrams given below are typical. Check the inside of the control box for
connection instructions/diagrams.
5.5.3 Machine delivered with a Variable Frequency Drive
(Option)
DANGER
Live wires. Carry out any work on the variable-frequency drive and motor.
Risk of electrical shock!
• Electrical installation work must only be executed by qualified personnel.
DANGER
Maintenance work without disconnecting the variable-frequency drive.
Risk of electrical shock.
• Disconnect and isolate the variable-frequency drive before attempting any work on it.
High voltages are present at the terminals and within the variable-frequency drive for
up to 10 minutes after disconnection of the electrical supply.
• Always ensure by using a suitable multimeter that no voltage is present on any drive
power terminals prior to commencing any work.
• Make sure that the power supply for the drive is compatible with the data on the
nameplate of the variable-frequency drive.
• If the machine is equipped with a power connector, install a residual current protective
device to protect persons in case of isolation default.
• Busch recommends installing a type B residual protective device and adapted to
the electrical installation.
• If the variable frequency drive is not equipped with a lockable disconnect switch,
provide it on the power line so that the machine is completely secured during main-
tenance tasks.
• Provide an overload protection according to EN 60204-1.
• Busch recommends installing a C-curve circuit breaker.
• Connect the protective earth conductor.

5 | Installation
18 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
NOTICE
The admissible motor speed exceeds the recommendation.
Risk of damage to the machine!
• Check the admissible motor speed range, see Technical Data [►32].
NOTICE
Incorrect connection.
Risk of damage to the variable frequency drive!
• The wiring diagrams given below are typical. Check the connection instructions/dia-
grams.
5.5.4 Wiring Diagram Three-Phase Motor
NOTICE
Incorrect direction of rotation.
Risk of damage to the machine!
• Operation in the wrong direction of rotation can destroy the machine in a short time!
Prior to start-up, ensure that the machine is operated in the right direction.
• Determine the intended direction of rotation with the arrow (stuck on or cast).
• Jog the motor briefly.
• Watch the fan wheel of the motor and determine the direction of rotation just before
the fan wheel stops.
If the rotation of the motor must be changed:
• Switch any two of the motor phase wires.
Delta connection (low voltage): Star connection (high voltage):
Double star connection, multi-voltage
motor with 12 pins (low voltage):
4
4
4
Star connection, multi-voltage motor
with 12 pins (high voltage):
4
4
4

Installation | 5
Instruction Manual R5 RA RC 1000-1600 B_EN_en 19 / 36
Delta connection, multi-voltage motor
with 12 pins (middle voltage):
4
4
4
5.6 Electrical Connection of the Monitoring Devices
NOTE
In order to prevent potential nuisance alarms, Busch recommends that the control system
is configured with a time delay of at least 20 seconds.
5.6.1 Wiring Diagram Temperature Switch "Gas"
Part no.: 0651563747
Connector: M12x1, 4-pin
Electrical data:
U = ≤ 250 V AC/DC (50/60 Hz) ; I = ≤ 1 A
Switch point: T1 pin 1 + 2 = 110 °C
1 2
4 3
2
1
T1
4
3
T2
1 = Brown ; 2 = White ;
3 = Blue ; 4 = Black
5.6.2 Wiring Diagram Temperature Switch "Oil"
Part no.: 0651563747
Connector: M12x1, 4-pin
Electrical data:
U = ≤ 250 V AC/DC (50/60 Hz) ; I = ≤ 1 A
Switch point:
T1 pin 1 + 2 = 110 °C*
T2 pin 3 + 4 = 130 °C*
1 2
4 3
2
1
T1
4
3
T2
1 = Brown ; 2 = White ;
3 = Blue ; 4 = Black
* The switch point value depends on the oil type, see Oil [►33].
5.6.3 Wiring Diagram Level Switch
Part no.: 0652569 236
Connector: M12x1, 4-pin
Electrical data:
U = 10 – 30 V DC
I consumption : <15 mA
I output max : 150 mA
Switch point:
Pin 1 = low level
1
4
3
0.5 A
K
1 = Brown: Supply +24V DC
3 = Blue: Supply 0V DC
4 = Black: Signal low level
NOTE:
For this device, the recommended time
delay to prevent nuisance alarms can be up
to 240 seconds.

5 | Installation
20 / 36 Instruction Manual R5 RA RC 1000-1600 B_EN_en
5.6.4 Wiring Diagram Resistance Thermometer (Optional)
Part no.: 0651563753
Connector: M12x1, 4-pin
Electrical data:
U = 10 … 35 VDC
4 ... 20 mA ► 0 ... 150 °C
Warning / trip signals: see Oil [►33].
1 2
4 3
3
1
+
-
1 = Brown ; 3 = Blue
5.6.5 Wiring Diagram Pressure Switch (Optional)
Part no.: 0653563750
Connector: M12x1, 4-pin
Electrical data:
U = ≤ 250 V AC/DC (50/60 Hz) ; I = ≤ 4 A
Switch point:
P pin 1 + 2 = 0.6 bar (overpressure)
1 2
4 3
2
1
P
1 = Brown ; 2 = White
5.6.6 Wiring Diagram Inlet Pressure Transmitter (Optional)
Part no.: 0653 233 987
Connector: M12x1, 4-pin
Electrical data:
U = 7 ... 33 VDC
4 ... 20 mA ► 0 ... 1 bar (abs.)
1 2
4 3
3
1
+
-
1 = Brown ; 3 = Blue
Warning signal:
Pwarning = 0.4 bar (overpressure)
Trip signal:
Ptrip = 0.6 bar (overpressure)
5.6.7 Wiring Diagram Outlet Pressure Transmitter (Optional)
Part no.: 0653 224 363
Connector: M12x1, 4-pin
Electrical data:
U = 7 ... 33 VDC
4 ... 20 mA ► 0 ... 1 bar (abs.)
1 2
4 3
3
1
+
-
1 = Brown ; 3 = Blue
Warning signal:
Pwarning = 0.4 bar (overpressure)
Trip signal:
Ptrip = 0.6 bar (overpressure)
5.6.8 Wiring Diagram Pressure Switch of Water-oil Heat
Exchanger (Optional)
Part no.: 0653000 002
Electrical data:
U = 230 VAC ; I = 1 A
U = 24 … 100 VDC ; I = 0.5 … 2 A
Contact: Normally open
Switch point:
Ptrip = 2 bar (relative) ► min. admissible
pressure
2 4
P >
1
PE