EF EVO 45 User manual

Operating Manual
Cooling unit EVO 45
Type: WKL 390
Article no.: 0390.013
3x460V, 60Hz

ef cooling Ernst H. Furrer AG Operating manual
1-2 Chapter page Issue: 07 / 2015 Cooling unit EVO 45, 0390.013
Safety notice
First carefully read through this operating manual.
Pay particular attention to the safety instructions contained in chapter 2 Safety, before performing work on
the cooling unit.
The work described in this operating manual must only be carried out by persons who fulfil the personnel
qualifications listed at the start of the corresponding chapter.
Follow the safety notes, keep to the handling instructions and follow the described handling processes.
Foreword
This operating manual enables users to correctly operate the cooling unit described in all life phases and
without danger.
Change history
Description of the change
Where
(Chapter/Page)
Date
Complete revision and redesign
All
07 / 2015
©) Copyright 2015 Ernst H. Furrer AG
This operating manual must not be copied, scanned or duplicated in any other electronic way.
Translation of the original German version.

Operating manual ef cooling Ernst H. Furrer AG
Cooling unit EVO 45, 0390.013 Issue: 07 / 2015 Chapter-Page 1-3
Table of contents
1 General information ....................................................................................... 1-6
1.1 Purpose of this operating manual .................................................................. 1-6
1.2 Target groups ................................................................................................... 1-6
1.3 Explanation of symbols and abbreviations .................................................... 1-6
1.3.1 Product-specific designations ............................................................................................ 1-6
1.3.2 Abbreviations used ............................................................................................................ 1-6
2 Safety .............................................................................................................. 2-7
2.1 Appropriate use ............................................................................................... 2-7
2.2 Incorrect use .................................................................................................... 2-7
2.3 Hazards due to incorrect use .......................................................................... 2-7
2.4 Meaning of hazard warnings ........................................................................... 2-7
2.5 Authorisation of personnel ............................................................................. 2-8
2.6 Personal protection ......................................................................................... 2-8
2.7 Hazard areas .................................................................................................... 2-8
2.8 Personal protective equipment ....................................................................... 2-8
2.9 Handling of pressure vessels ......................................................................... 2-9
2.10 Medium quality ................................................................................................. 2-9
2.11 Safety notices on the product ......................................................................... 2-9
2.12 Protective devices ........................................................................................... 2-9
2.12.1 Main switch ........................................................................................................................ 2-9
2.12.2 Refrigerant circuit ............................................................................................................. 2-10
2.12.3 Medium circuit .................................................................................................................. 2-10
2.12.4 Monitoring devices ........................................................................................................... 2-11
2.12.5 Temperature regulator devices ........................................................................................ 2-11
2.13 Use of original spare and wear parts ............................................................ 2-11
2.14 Safety concept ............................................................................................... 2-11
2.15 Duty to instruct of the operating company .................................................. 2-12
2.16 Duty to inform of the operating company .................................................... 2-12
2.17 Noise emission ............................................................................................... 2-12
3 Description ................................................................................................... 3-13
3.1 Identification................................................................................................... 3-13
3.1.1 Nameplate........................................................................................................................ 3-13
3.1.2 Model variants ................................................................................................................. 3-13
3.2 Setup and function......................................................................................... 3-14
3.2.1 Overview .......................................................................................................................... 3-14
3.2.2 Controller ......................................................................................................................... 3-14
3.2.3 Refrigerant circuit ............................................................................................................. 3-14
3.2.4 Medium circuit .................................................................................................................. 3-14

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4 Packing and transport ................................................................................ 4-15
4.1 Safety .............................................................................................................. 4-15
4.1.1 Personnel qualification .................................................................................................... 4-15
4.2 Preparations for transport ............................................................................. 4-15
4.2.1 Emptying (frost protection) .............................................................................................. 4-15
4.3 Packing ........................................................................................................... 4-16
4.4 Transport ........................................................................................................ 4-16
5 Installation and assembly ........................................................................... 5-18
5.1 Safety .............................................................................................................. 5-18
5.1.1 Personnel qualification .................................................................................................... 5-18
5.2 Energy connections ....................................................................................... 5-18
5.3 Installation ...................................................................................................... 5-18
5.4 Assembly ........................................................................................................ 5-19
5.4.1 Electrical connection ....................................................................................................... 5-19
5.4.2 Connecting the remote control ........................................................................................ 5-19
5.4.3 Connections of the medium circuit .................................................................................. 5-19
6 Commissioning ........................................................................................... 6-20
6.1 Safety .............................................................................................................. 6-20
6.1.1 Personnel qualification .................................................................................................... 6-20
6.2 Venting the pump ........................................................................................... 6-20
6.3 Checks prior to commissioning .................................................................... 6-20
6.3.1 Oil sump heater (optional) ............................................................................................... 6-20
6.4 Procedure for commissioning ....................................................................... 6-21
6.4.1 Medium circuit ................................................................................................................. 6-21
6.4.1.1 Medium requirements ..................................................................................................... 6-21
6.4.1.2 Commissioning the medium circuit ................................................................................. 6-21
6.4.2 Refrigerant circuit ............................................................................................................ 6-21
6.4.3 Operating state "Total Off" .............................................................................................. 6-22
7 Operation ..................................................................................................... 7-23
7.1.1 Personnel qualification .................................................................................................... 7-23
7.1.2 Description of the PLC .................................................................................................... 7-23
7.1.3 Troubleshooting at operator level ................................................................................... 7-23
8 Inspection and maintenance ...................................................................... 8-25
8.1 Safety .............................................................................................................. 8-25
8.1.1 Personnel qualification .................................................................................................... 8-25
8.2 Visual inspection ............................................................................................ 8-25
8.2.1 Tank and medium circuit ................................................................................................. 8-25
8.2.2 Alarms on the display ...................................................................................................... 8-25
8.2.3 Air-cooled cooling units ................................................................................................... 8-25
8.2.4 Water-cooled cooling units .............................................................................................. 8-26
8.3 Maintenance schedule ................................................................................... 8-26
9 Repair ........................................................................................................... 9-27

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9.1 Safety .............................................................................................................. 9-27
9.1.1 Personnel qualification ..................................................................................................... 9-27
9.2 Replacing air and water filters ...................................................................... 9-27
9.2.1 Replacing air filters .......................................................................................................... 9-27
9.2.2 Replacing the water filter ................................................................................................. 9-27
9.2.3 Replacing the operating media ........................................................................................ 9-28
9.3 Replacing defective components ................................................................. 9-28
9.4 Troubleshooting at repair level ..................................................................... 9-28
10 Decommissioning/Storage........................................................................ 10-29
10.1 Safety ............................................................................................................ 10-29
10.1.1 Personnel qualification ................................................................................................... 10-29
10.2 Disassembly ................................................................................................. 10-29
10.3 Storage ......................................................................................................... 10-29
11 Disposal ...................................................................................................... 11-30
11.1 Safety ............................................................................................................ 11-30
11.1.1 Personnel qualification ................................................................................................... 11-30
11.2 Procedure ..................................................................................................... 11-30
12 Customer Service ...................................................................................... 12-31
12.1 Address ........................................................................................................ 12-31
13 Technical documents ................................................................................ 13-33
13.1 Technical data .............................................................................................. 13-33
13.2 Statement of Conformity ............................................................................. 13-37
13.3 Bill of materials/Spare parts list .................................................................. 13-41
13.4 Drawings ....................................................................................................... 13-45
13.5 Refrigeration/hydraulics diagram ............................................................... 13-49
13.6 Wiring diagram ............................................................................................. 13-53
13.7 PLC manual .................................................................................................. 13-57

ef cooling Ernst H. Furrer AG Operating manual
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1 General information
1.1 Purpose of this operating manual
Using this operating manual, users can operate the cooling unit safely and carry out the work
described safely and correctly.
1.2 Target groups
The target groups of this operating manual are all persons who work on or with this cooling unit
in the course of the various life phases. The requirements placed on the target groups are
described in the respective personnel qualifications of the active chapter.
Packing/Transport: Shipping and transport experts
Assembly: Fitters
Commissioning: Service technicians
Operating: Operating specialists
Maintenance: Plant mechanics
Repair: Plant mechanics
Plant electricians
Refrigeration technicians (with certificate for refrigerant)
Troubleshooting: Plant mechanics
Plant electricians
Refrigeration technicians (with certificate for refrigerant)
Disassembly: Fitters
Disposal: Refrigeration technicians (with certificate for refrigerant)
Specialists with knowledge of legislation and materials
1.3 Explanation of symbols and abbreviations
1.3.1 Product-specific designations
Refrigerant circuit
Closed refrigerant circuit in which the refrigerant circulates.
Water circuits
Open refrigerant circuit with integrated, high capacity tank.
1.3.2 Abbreviations used
The international SI unit system is basically used for the physical units, including:
A Ampere
bar Pressure
K Kelvin
kg Kilogram
kW Kilowatt
Rxxxx Refrigerant (e.g. R407C)
V Volt
VAC AC voltage
VDC DC voltage

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2 Safety
This chapter contains safety-relevant codes of conduct and procedures that are necessary for
safe operation and which must be adhered to.
2.1 Appropriate use
The cooling unit is used exclusively to cool and heat the medium specified in the technical data
within the specified temperature limits. The quality of the medium must comply with the
specifications of the laser equipment manufacturer.
Any other use is deemed to be incorrect use.
2.2 Incorrect use
Non-adherence to the following points is deemed to be incorrect use:
– this operating manual and the technical data contained therein
– the operating conditions
– the work processes
– the maintenance work
The following also count as incorrect use:
– Operation in explosive or inflammable atmospheres
– Storage and transport of the equipment where there is a danger of frost, without
completely draining the tank and the pumps.
The manufacturer's warranty becomes automatically void for any damage due to incorrect use.
Any claims for compensation for damage caused by incorrect use shall not be accepted by the
manufacturer.
2.3 Hazards due to incorrect use
No hazards due to incorrect use are known.
2.4 Meaning of hazard warnings
The following hazards are residual hazards that cannot be eliminated in concept or design with
suitable safety devices.
These residual hazards have been divided into the following groups according to severity and
frequency:
These safety instructions warn of dangers which can result in fatal physical injury if not
observed.
These safety instructions warn of dangers which can result in serious physical injury if
not observed.
These safety instructions warn of dangers which can result in minor physical injury or
material damage if not observed.

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Note
These notes warn of risks where proper functioning or specified performance
parameters cannot be achieved if not heeded.
2.5 Authorisation of personnel
The work described in this operating manual must only be carried out by specifically authorised
personnel.
Only persons who fulfil the requirements under the "Personnel Qualification" entry of the
individual main chapter are authorised.
2.6 Personal protection
The refrigerant in the refrigerant circuit is pressurised.
Protective goggles and safety gloves must be worn when working on the refrigerant
circuit.
Escaping refrigerant can lead to serious injury of the eyes and skin as well as
respiratory distress (displacement of oxygen in the air).
• Prior to commissioning of the cooling unit, always check that all safety devices are fitted
correctly and that all protective covers are closed.
• Before any service work, the cooling unit must be switched off and secured against being
switched back on without authorisation. All sources of energy such as:
– Electricity must be disconnected.
– Refrigerant: Before working on the refrigerant circuit, the refrigerant must be properly
removed and the circuit depressurised.
– Water: The water must be drained before working on the water circuit.
2.7 Hazard areas
No hazard areas are specified in and around the cooling unit.
Note
A loss of power or switching off the main switch when there is a danger of frost and with the
unit filled with water can lead to damage of the unit.
2.8 Personal protective equipment
The following personal protective equipment must be worn when working on the refrigerant
circuit of the cooling unit:
• Protective goggles
• Safety gloves

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2.9 Handling of pressure vessels
Note
All work on the refrigerant circuit must be carried out by trained refrigeration
specialists. Comply with the local laws and regulations.
The refrigerant circuit and its components are pressurised. The associated pressure vessel
ordinances must be adhered to in this area.
2.10 Medium quality
The operating medium to be used is defined in Chap. 13.1 Technical data.
Only fill in a mixture of 33 % propylenglycol / 67 % clean water.
2.11 Safety notices on the product
Safety notices on the product must always be kept in a legible condition. Fallen or missing
safety notices must be replaced or reinstalled immediately in accordance with the following
description.
Fig. 2.1 Warning of electrical voltage
2.12 Protective devices
Before each commissioning, make sure that all protective devices are fitted correctly and their
protective function is in full working order.
2.12.1 Main switch
When the main switch is switched off the cooling unit is de-energized. The main switch is built
into the control cabinet door.

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2.12.2 Refrigerant circuit
The refrigerant circuit is equipped with the following safety devices:
Low-pressure transmitter (ND)
The low-pressure transmitter monitors the suction side against impermissibly low operating
pressure in the refrigerant circuit. If there is a malfunction, the controller switches the
compressor off and signals this on the display. Cooling is switched back on after the alarm on
the display has been acknowledged. When the device is switched on again, the alarm is
delayed.
(See also Chap. 7.1.3 Troubleshooting at operator level and 9.4 Troubleshooting at repair
level).
High-pressure transmitter (HD)
The high-pressure transmitter monitors the pressure side against impermissibly high operating
pressure in the refrigerant circuit. If there is a malfunction, the controller switches the
compressor off and signals this on the display. Cooling is switched back on when the refrigerant
circuit has cooled sufficiently and the alarm on the display has been acknowledged.
(See also Chap. 7.1.3 Troubleshooting at operator level and 9.4 Troubleshooting at repair
level).
High-pressure safety pressure switch (HDS)
The high-pressure safety pressure switch protects the pressure side against impermissibly high
operating pressure in the refrigerant circuit. If there is a malfunction, the high-pressure safety
pressure switch turns off the compressor and signals the malfunction on the display. Cooling is
switched back on when the refrigerant circuit has cooled sufficiently and the alarm on the
display has been acknowledged.
(See also Chap. 7.1.3 Troubleshooting at operator level and 9.4 Troubleshooting at repair
level).
2.12.3 Medium circuit
The medium circuit is equipped with the following safety devices:
Flow meter
The flow meter monitors the evaporator for impermissibly low flow-through, i.e. for freezing due
to low flow speed.
The flow meter also protects the pump against running dry. If there is a malfunction, the
controller switches off the pump (as well as the cooling) and shows the malfunction on the
display. Cooling is switched back on after the alarm on the display has been acknowledged.
(See also Chap. 7.1.3 Troubleshooting at operator level and 9.4 Troubleshooting at repair
level).
Evaporator outlet sensor
The evaporator outlet sensor monitors the evaporator for impermissibly low outlet temperature
of the water. If there is a malfunction, the controller switches the compressor off. This is shown
on the display. Cooling is switched back on after the alarm on the display has been
acknowledged.
(See also Chap. 7.1.3 Troubleshooting at operator level and 9.4 Troubleshooting at repair
level).

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Float switch with low and high switch point
The low switch point monitors the water fill level in the tank. Thus temperature constancy in the
water outlet, and the dry run protection of the pump are achieved. If there is a malfunction, the
controller switches off the pump and also the cooling and signals the malfunction on the display.
The cooling is switched back on after water is topped up and the alarm on the display has been
acknowledged.
(See also Chap. 7.1.3 Troubleshooting at operator level and 9.4 Troubleshooting at repair
level).
Float switch high
The high switch point outputs a warning on the PLC display. Top up water to "Max." marking.
2.12.4 Monitoring devices
Motor protection switches – compressor, pump, fans
If there is increased motor power and if there is a short circuit, the motor protection switch
switches off and interrupts the power supply. The fault is shown on the display. The cooling is
switched back on after the fault has been cleared and the alarm on the display has been
acknowledged.
(See also Chap. 7.1.3 Troubleshooting at operator level and 9.4 Troubleshooting at repair
level).
Microprocessor-controlled programmable logic controller (PLC)
The PLC regulates the temperature and monitors the excess temperature or insufficient
temperature. If the water temperature is too high or too low, the controller switches the laser
enable off and shows the malfunction on the display. The laser is enabled after the water is
back in the operating range and the alarm on the display has been acknowledged.
(See also Chap. 13-57 PLC manual, 7.1.3 Troubleshooting at operator level and 9.4
Troubleshooting at repair level).
Monitoring the air filters
The high-pressure transmitter monitors the system pressure on the high-pressure side. If the
condensation pressure is outside of the normal work range but within the limit value, the display
shows a warning.
(See also Chap. 13-57 PLC manual, 7.1.3 Troubleshooting at operator level and 9.4
Troubleshooting at repair level).
2.12.5 Temperature regulator devices
Microprocessor-controlled programmable logic controller (PLC)
Temperature control and regulation of the water circuit are handled by the PLC. The PLC
regulates the water temperature depending on the set setpoint. The tank temperature is shown
on the display.
(See also Chap. 13-57 PLC manual, 7.1.3 Troubleshooting at operator level and 9.4
Troubleshooting at repair level).
2.13 Use of original spare and wear parts
Only original spare parts may be used. Proper functioning of the cooling unit can no longer be
guaranteed by the manufacturer if third party spare parts are used. In such cases, all warranty
claims are automatically void.
2.14 Safety concept
This cooling unit is part of a wider system and must consequently be integrated in the safety
concept of the wider system.

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2.15 Duty to instruct of the operating company
The operating company of this cooling unit is responsible for ensuring that replacement
personnel attend the customer training course and are informed of all hazards.
2.16 Duty to inform of the operating company
The operating company of this cooling unit is obligated to inform the manufacturer when selling
the cooling unit and to disclose the new operating company.
The operating manual is part of the cooling unit and must accompany it.
2.17 Noise emission
The emission sound pressure level is specified in the Technical data.
See Chap. 13.1 Technical data

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3 Description
3.1 Identification
3.1.1 Nameplate
Fig. 3.1 Installation of the nameplate
Position of the nameplate
The nameplate is located top left on the front of the cooling unit. A copy of this is also attached
in the control cabinet.
Fig. 3.2 Position of the nameplate
3.1.2 Model variants
• Mains voltage / frequency
See type plate and Chap. 13.1 Technical data

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3.2 Setup and function
3.2.1 Overview
The cooling unit is a ready-to-connect device and essentially consists of the housing, the
components of the refrigerant circuit, cooling air and medium circuit, the control cabinet, and all
control, regulating and monitoring devices that are necessary for automatic operation.
The operating medium to be used is defined in Chap. 13.1Technical data.
3.2.2 Controller
The programmable logic controller (PLC) is responsible for safety, monitoring, control and regulation of the
entire cooling unit (see also Chap. 7 Operation).
3.2.3 Refrigerant circuit
The refrigerant circuit is a closed system in which the refrigerant circulates. In the plate
evaporator the process heat is transferred from the medium circuit to the refrigerant circuit at
low evaporation temperature, with the refrigerant transported through the compressor to the
condenser where it is dissipated to the ambient air at a high condensing temperature or to a
water circuit.
Components of the refrigerant circuit: See Chap. 13 Technical documents
3.2.4 Medium circuit
Medium circuit with tank
Through the installed tank, the medium circuit is designed as a system that is open to the
atmosphere. The generously dimensioned tank increases the constancy of the medium outlet
temperature. The pump conveys the medium out of the tank to the consumer, where it is
heated, and via the evaporator, which it is cooled, back to the tank.
Components of the medium circuit: See Chap. 13 Technical documents

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Cooling unit EVO 45, 0390.013 Issue: 07 / 2015 Chapter-Page 4-15
4 Packing and transport
4.1 Safety
Suspended loads can fall.
Never step or remain under suspended loads.
Non-observance of this instruction can lead to fatal injury.
Unsuitable or under-dimensioned lifting gear can break and the load can fall.
Only use suitable lifting gear with the required lifting capacity (see weight specifications
in Chap. 13.1 Technical data). Only suspend the cooling unit on the suspension straps
provided.
Non-observance of this instruction can lead to fatal injury.
Material damage due to frost.
Transport or storage in a frost-exposed environment leads to material damage if the
water circuits have not been fully drained beforehand.
4.1.1 Personnel qualification
This cooling unit must only be packed and transported by personnel who fulfil the following
requirements:
• Have read and understood Chap. 2 Safety
• Experience in or introduction into the areas of packing and transport
4.2 Preparations for transport
4.2.1 Emptying (frost protection)
Storage and transport in environments subject to freezing
The tank, pump and water circuit must be fully emptied prior to storage.
Unscrew the filter cup. Make sure that the O-ring doesn’t get lost.

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Emptying the pump
to drain off the fluid: remove screw
Horizontal pump
Fig. 4.1 Emptying the pump
1 Removal of rest air
2 Opening for draining
Procedure:
1. Remove screw (see Fig. 4.1).
2. Empty completely the pump for avoiding any damages.
After complete draining reinsert the filling plug and drain screw into the pump
Install and fit the water filter back into the filter cup.
4.3 Packing
The unit is screwed provided with suitable packing for overland transport.
4.4 Transport
Transport-specific data
See Chap. 13.1 Technical data for weight and dimensions. The cooling unit must be secured to
prevent shifting and tipping in all cases. The cooling unit must be upright and contain no
medium when transported.
Transport damages
Upon receipt, the cooling unit must be immediately checked for damage incurred in transit.
Transport damage must be noted on the delivery note and the shipping agent notified
immediately. A damaged cooling unit must not be put into operation.
Once delivered, the cooling unit must be transported using a forklift truck or a crane. During
transport, ambient temperatures of +5 to + 63 °C are permissible. Lower temperatures only after
completely emptying the water circuit (see Chap. 4.2.1 Emptying (frost protection)).
Transportation by forklift truck
Maintain a slow lifting speed.
Pay attention to the unit's centre of gravity, so that it does not tip over.
2
1

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Transportation by crane
Where provided, the suspension eyelets (4-point attachment) must be used for transportation by
crane.
Fig. 4.2 Suspension eyelets
Lifting equipment
Cables (cable suspension gear) per DIN 3088 or chains (chain suspension gear) per DIN
5687/5688. Both forms of lifting equipment fulfil the necessary requirements for attachment with
even cable or chain lengths.
Cable inclination angle
The cable inclination angle to the vertical must not exceed 45°.
Lifting speed
Maintain a slow lifting speed (precision hoist, jolt-free lifting).
Setting down the cooling unit
In order to avoid an uncontrolled deformation of the housing frame, the cooling unit should be
set down on a level surface.
Transportation by lorry
The load and the cooling unit must be secured to prevent shifting, tipping, and lifting in all
cases. Transportation on roads with surface damage or unmade roads requires special
measures and an appropriate driving manner to avoid damage to the cooling unit.

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5 Installation and assembly
5.1 Safety
Suspended loads can fall.
Never step or remain under suspended loads.
Non-observance of this instruction can lead to fatal injury.
Note
Free intake and blow-out of the cooling air and an adequate air exchange for heat
dissipation from the assembly site of the cooling unit must be ensured.
5.1.1 Personnel qualification
This cooling unit must only be installed and fitted by personnel who fulfil the following
requirements:
• Have read and understood Chap. 2 Safety
• Have completed basic mechanical and electrical training
5.2 Energy connections
The energy connections must be provided by the operating company. Refer to Chap. 13.1
Technical data for the required energy connections and connecting points.
The operating company is responsible for ensuring that the electrical connections are
safeguarded and implemented in accordance with the country-specific regulations.
The cooling unit must be connected in accordance with the electrical diagram supplied.
5.3 Installation
The cooling unit must be installed in a frost-free room on an even, horizontal surface and with
the requisite load-bearing capacity. There is no requirement for securing the foundations, the
use of underliners or vibration absorbers. Pipes must be flexibly connected with the cooling unit
by means of compensators or hoses.
Operation in frost conditions and installation outdoors require additional measures:
- Optional heating kit and permanent power supply
- Weather-resistant housing, rain protection
- Suitable antifreeze mixture
Observe the minimum distances during installation in order for the cooling unit to function in a
fault-free manner.
See Chap. 13.4 Drawings

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5.4 Assembly
Place the cooling unit at the intended position and secure against shifting.
For unit-specific connections, see Chap. 13.1 Technical data
5.4.1 Electrical connection
Note
Make sure that the electrical feed is shut off throughout the assembly period.
Connect the power feed cable (terminal X1)
Connect the communication cable (terminal X3).
5.4.2 Connecting the remote control
The cooling unit is prepared for connection of a remote control with potential-free group alarm,
ON-OFF and enable (see electrical diagram).
5.4.3 Connections of the medium circuit
Connect the water hoses in accordance with the labelling on the cooling unit
(inlet/outlet) and secure with hose clips.
The line nominal widths for the external medium circuit must be determined based on the
available pump pressure and the expected loss in pressure in the consumer circuit. The medium
lines can be implemented with a fixed or flexible design.
Ensure material compatibility throughout the entire medium circuit. The following materials can
be installed in the water circuit in the cooling unit:
– Copper
– Stainless steel
– Brass
– Plastic
– Nitrile elastomer
Depending on the materials used in the external water circuit, (outside of the unit, customer-
provided installation), material incompatibilities can cause corrosion damage.
Pay particular attention in this regard if using galvanised and aluminium materials.
If in doubt, consult qualified specialist companies.
Note
When connecting the medium circuit, avoid contamination in the external line system
(rinse the lines prior to connecting).

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6 Commissioning
6.1 Safety
Caution - dangerous voltage!
Before commencing commissioning, switch off the main switch and secure against
being switched back on without authorisation.
Non-observance of this safety instruction can result in electrocution with fatal physical
injury.
6.1.1 Personnel qualification
This cooling unit must only be installed and placed in operation by personnel who fulfil the
following requirements:
• Have read and understood Chap. 2 Safety
• Have completed basic mechanical and electrical training
6.2 Venting the pump
Note
Before filling the medium tank, remove the filter cup so that the pump is vented.
(See Chap. 6.4.1.2 Commissioning the medium circuit)
6.3 Checks prior to commissioning
• All transport aids and assembly fixtures are removed
• Filter cup removed (see Chap. 6.2 Venting the pumps)
• Electrical connections connected correctly (see Chap. 5.4.1 Electrical connection)
• All motor protection switches at "0" position
• Connections of the medium circuit are connected correctly (see Chap. 5.4.3 Connections of
medium circuit)
6.3.1 Oil sump heater (optional)
At temperatures below 10 °C, switch on the oil sump heater for 2 hours prior to commissioning.
To do so, set the motor protection switch of the controller power and the heaters to the "I"
position and turn on the main switch. The other motor protection switches remain switched off.
(See Chap. 13.6 Electrical circuit diagram)