Laird LA 5000 User manual

Operation Manual
Liquid-Air Cooling Unit LA 5000
Version 1.0

Laird Thermal Systems s.r.o.
Prumyslová 497
462 11 Liberec
Czech Republic
Phone: [phone]
Protection Notice
Dissemination as well as copying of this document, utilization or posting of its contents is not permitted
unless formally granted. Violations entail claims for compensation. All copyrights, including rights due to
patent grant or registration of a utility model or design, are reserved.
All product names used in this manual are trademarks of the corresponding manufacturers.
Technical modifications are subject to change.

Table of Contents
3
Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
Table of Contents
1About this Manual........................................................................................................................ 6
1.1 Terms of Guarantee........................................................................................................................ 6
1.2 Contact Information......................................................................................................................... 7
2Product Identification................................................................................................................... 8
2.1 Unit Specifications........................................................................................................................... 8
2.2 Identification Plate........................................................................................................................... 8
3Safety Regulations....................................................................................................................... 9
3.1 Hazard classes.................................................................................................................................9
3.2 Safety Symbols................................................................................................................................ 9
3.3 Hints for Safe Operation..............................................................................................................10
3.3.1 Prevent Hazards ................................................................................................................................................ 10
3.3.2 Hints Regarding the Electrical Equipment......................................................................................................... 10
3.3.3 Environmental Issues......................................................................................................................................... 11
3.4 Safety Equipment..........................................................................................................................11
3.4.1 Safety and Signalling Equipment included in the Unit....................................................................................... 11
3.4.2 Guards................................................................................................................................................................ 12
3.4.3 Caution Labels................................................................................................................................................... 12
3.5 In Case ofAccidents.....................................................................................................................13
4Product Description................................................................................................................... 14
4.1 Intended Use..................................................................................................................................14
4.2 Use not in Conformancewith the Intended Use...................................................................14
4.3 Unit Components...........................................................................................................................15
4.4 Specifications..................................................................................................................................16
4.5 Setting-up Requirements.............................................................................................................17
4.5.1 Installation Location............................................................................................................................................ 17
4.5.2 Environmental Conditions.................................................................................................................................. 17
4.5.3 Infrastructure...................................................................................................................................................... 17
5Transport...................................................................................................................................... 18
5.1 Safety Indications for Transportation and Setting-up...........................................................18
5.2 Transportation of the Unit............................................................................................................18

Table of Contents
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
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387009381
5.3 Unpacking........................................................................................................................................18
6Initial Operation........................................................................................................................... 19
6.1 Safety Indications Related to Initial Operation.......................................................................19
6.2 Setting to Work...............................................................................................................................19
6.2.1 Placement...........................................................................................................................................................19
6.2.2 Cooling Circuit Connection and Filling................................................................................................................20
6.2.3 Electrical Connections........................................................................................................................................21
6.2.4 Carrying out Setting to Work...............................................................................................................................22
6.3 Daily Start-up..................................................................................................................................23
6.4 Setting to work afterStorage......................................................................................................23
7Controlling the Unit.................................................................................................................... 24
7.1 Safety Indications for Controlling the Unit...............................................................................24
7.2 Switching on the Unit....................................................................................................................24
7.3 Switching off the Unit....................................................................................................................24
7.4Settings.............................................................................................................................................25
8Disruptions................................................................................................................................... 27
8.1 Disruption in Operation.................................................................................................................27
8.1.1 Trouble Shooting.................................................................................................................................................27
9Maintenance and Cleaning..................................................................................................... 28
9.1 Maintenance Schedule.................................................................................................................28
9.2 Cleaning of Heat Exchanger.......................................................................................................28
9.3 Refilling of Coolant.........................................................................................................................28
9.4 Cleaning of Strainer.......................................................................................................................29
9.5 Cleaning of Unit Casing...............................................................................................................30
10 Repair........................................................................................................................................... 31
10.1 Repair of unit...................................................................................................................................31
11 Dismounting, Disposal, Storage............................................................................................. 32
11.1 Temporary Placing out of Operation.........................................................................................32
11.2 Drain of unit.....................................................................................................................................33
11.3 Re-packaging of the unit..............................................................................................................33
11.4 Storing the Unit...............................................................................................................................33
11.5 Disposal............................................................................................................................................33

Table of Contents
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
11.6 Disposal of Operating Materials.................................................................................................33
11.7 Return of the unit to LAIRD THERMAL SYSTEMS.............................................................34
12 Wear Parts and Spare Parts................................................................................................... 35
12.1 Units wear and spare parts.........................................................................................................35
Addendum......................................................................................................................................... 37
Flow scheme.............................................................................................................................................37
Wiring diagram..........................................................................................................................................38
Dimensional drawing...............................................................................................................................39
Performance diagram.............................................................................................................................40
Flow versus pressure..............................................................................................................................41
EC-DECLARTION OF CONFORMITY.......................................Fel! Bokmärket är inte definierat.
History of Changes, Document No. 387009851
Date
Index
Reason for Change
Name
Page
09-August-2022
V 1.0
Document number changed from
337007274 to 387009351.
Peter Larsson

About this Manual
Terms of Guarantee
6
Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
1 About this Manual
This Operational Manual addresses the needs of the user of the unit. Its intention is to allow the safe
operation of the unit. Thus, it should be read carefully and be kept in a space accessable for the users of the
unit at any time.
All chapters of this Operation Manual can be read independently and thus can be used for look-up purposes.
1.1 Terms of Guarantee
General sale and delivery terms of LAIRD THERMAL SYSTEMS apply. The buyer accepts these terms, at
the latest when signing the contract of purchase.
The particular terms of guarantee and duration of guarantee of the unit in question can be taken from the
contract documents as well as from the order confirmation.
Warranty claims and liability are excluded in case of one of the following situations:
•Use of the unit in an unintended way
•Inaccurate installation, putting into service, operation, repair or maintenance of the product by people
that are not fully authorized
•Use of the product despite of defect, wrongly implemented or non-functional safety units or protective
gear
•Unauthorized or forbidden modifications by the user concerning the electrical equipment of the unit
•Unauthorized or forbidden modifications by the user concerning the mechanical structure of the unit
•Unauthorized or forbidden modifications by the user concerning the operating parameters
•Use of unauthorized tools
•Use of unauthorized operating supplies
•Exceedance of mandatory maintenance intervals
•Cases of disaster caused by foreign matter influence or act of nature beyond control
PLEASE NOTE
Any form of unintended use of the unit and any structural change caused by the user without prior
authorization in written form by LAIRD THERMAL SYSTEMS will lead to the termination of warranty as well
the termination of the declaration of conformation and will free LAIRD THERMAL SYSTEMS from product
liability. This concern includes safety devices as well.
In case of authorized changes or when adding optional equipment, it is the sole responsibility of the
customer to assure the accurate implementaion of the required safety devices.

About this Manual
Contact Information
7
Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
1.2 Contact Information
If you have questions with respect to this unit, please use the contact information given below. Always
communicate the following:
•Your name and address
•Name of contact at your address
•Product data as on identification plate: Type of unit, serial number and year of manufacture
Company contact:
Post: Laird Thermal Systems s.r.o.
Prumyslová 497
462 11 Liberec
Czech Republic
Tel: [phone]
Fax: [phone]
E-Mail:[email protected]
Homepage: www.lairdthermal.com

Product Identification
Unit Specifications
8
Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
2 Product Identification
2.1 Unit Specifications
Manufacturer
Laird Thermal Systems s.r.o
Type of product
Liquid-air cooler
Type of unit
LA 5000
Article number
387009381
Table 1: Unit specifications
2.2 Identification Plate
The identification plate is attached to the front side of the unit (see Fig. 1).
Fig. 1: Position of identification plate
1
Identification plate
Fig. 2: Unit specific identification plate
1
Unit type
2
Article number
3
Serial number
4
Electrical specifications
5
Date of manufacture
1
5
2
3
4
1

Safety Regulations
Hazard classes
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
3 Safety Regulations
3.1 Hazard classes
In this document safety instructions are using standardized representation and symbols. Depending on the
probability of their incidence and the severeness of consequences three hazard classes are used.
DANGER
Reference to direct danger for humans.
Inobservance will lead to irreversible injuries or exitus.
CAUTION
Reference to noticeable danger for humans or possible damage to property.
Inobservance may lead to reversible injuries or to damage to property.
3.2 Safety Symbols
In this Operation Manual concrete safety instructions are given in order to point out unpreventable residual
risks when operating the unit. These risks include danger for
•Human beings
•The unit and other equipment
•The environment
The safety symbols used in this manual are indicated below. The main reason for their use is to point the
reader to the safety instruction given in the text field beside.
Symbol
Meaning
Warning with respect to general danger or damage to property
Warning with respect to electrical hazard
Table 2: Warning signs
Symbol
Meaning
This symbol indicates that disconnecting from mains is required.
Table 3: Signs giving orders

Safety Regulations
Hints for Safe Operation
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
3.3 Hints for Safe Operation
PLEASE NOTE
Conduct inspections on a regular time base!
This will ensure that the appropriate measures will be carried out indeed.
The unit is operational save. It was built according to the existing state of technology.
Despite this the unit could cause hazards if it
•is used in a way it was not intended for
•is used improperly
•is operated under unsuitable conditions
3.3.1 Prevent Hazards
Hazards can be prevented by safety-conscious and anticipatory behaviour of staff.
Everybody working with the unit should keep the following in mind:
•Make this Operation Manual available for everybody at the operational location of the unit in a
complete and perfectly readable form!
•Use the unit exclusively for what it was intended!
•The unit must be operational and errorfree. Check the condition of the unit before working with it and
within a regular time frame!
•Make sure that nobody can injure himself by any part of the unit!
•Any disruption or recognizable change concerning the unit should be reported to the responsible
person!
•Stick to the accident prevention regulations as well as any regional regulations!
•Unit must be unplugged from mains before it is opened!
3.3.2 Hints Regarding the Electrical Equipment
DANGER
Danger to life through electrical shock when working on the electrical equipment of the unit!
•Switch off the unit before starting your work!
•Disconnect the unit from mains by pulling the mains plug!
•Verify that the installation is dead (volt-free)!
•Carry out earthing or short circuiting!
When working on electrical installations the following principles should be observed:
•Works on the electrical installations may only be accomplished by qualified electrical staff!
•When connecting electrical equipment to mains regional regulations have to be observed. Be
aware of the information in the wiring diagram!
•The unit is powered by electricity. Electrical shock hazard exists, if the electrical installations are
defective or the insulation fails during operation.
•When switched off the unit is not disconnected from mains. This is only the case when the mains
plug is pulled.
•Any changes regarding the control elements of the unit can have an influence on the safe
operation. All intended changes must be authorized by the manufacturer.
•After the implementation of a change the operativeness of the safeguards must be verified.

Safety Regulations
Safety Equipment
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Laird Thermal Systems s.r.o
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Date: 08/09/2022
Version: 1.0
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•No unauthorized changes on the unit are allowed. All intended changes must be authorized by the
manufacturer.
3.3.3 Environmental Issues
Environmentally concious and anticipatory behaviour of staff avoids environmentally hazardous impacts.
The following principles apply for environmentally conscious behaviour:
•Environmentally hazardous substances must not get into the ground or the drains. They should be
kept in appropriate containers.
•Environmentally hazardous substances must be fed to utilization or disposal according to regional
regulations.
When dealing with operating supplies always keep aware of the safety data sheet of the corresponding
manufacturer.
3.4 Safety Equipment
PLEASE NOTE
The safety equipment listed below must be integrated in the local control environment by the customer,
unless otherwise noted. These works must be carried out only by trained experts. All required information
can be taken from the wiring diagram shown in the addendum.
Safety equipment must not be modified, removed or taken out of operation. All parts of the safety equipment
must be accessible at all times.
3.4.1 Safety and Signalling Equipment included in the Unit
The unit is equipped with safety equipment at critical spots (see Fig. 2)
•The Liquid throughput is controlled by a flow control device that must be integrated in the potential-
free safety circuit of the device to be cooled.
•The maximum temperature of the cooling circuit is controlled by a thermostat with an opener contact
that must be integrated into the safety circuit of the device to be cooled.
•The maximum pump pressure is limited by a safety valve that by-passes the liquid stream when the
pressure pre-set is exceeded.
•The minimum coolant level in the tank is secured by a level sensor.
Fig. 3: Safety equipment
1
Safety valve
2
Thermostat
3
Flow control device
4
Level sensor
1
4
2
3

Safety Regulations
Safety Equipment
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
3.4.2 Guards
Direct access to hazardous parts or areas of the unit is restricted by the unit cover. The cover may only be
removed for the purpose of maintenance or repair works and shall be replaced prior to taking the unit back
into operation. Before any of unit’s cover is open the power input must be disconnected. The back panel with
fan can be removed independently from the main cover by opening 7 screws. The unit cover is fixed by 7
screws. The electrical terminal area is accessable after removing the corresponding plate on the front side
held by two screws. For unscrewing/screwing or opening/closing of the fasteners a 7.0 x 1.0 mm slotted
screwdriver is required.
Fig. 4: Guards
1
Unit cover
2
Access plate for electric terminal block
3
Removable side panel
3.4.3 Caution Labels
Danger spots on the unit are indicated corresponding to German safety regulation BGV A8 "Sicherheits- und
Gesundheitsschutzkennzeichnung am Arbeitsplatz".
Caution labels on the unit must be easily readable at all times. Illegible caution labels must be exchanged
without delay.
3
2
1

Safety Regulations
In Case of Accidents
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
Fig. 5: Caution labels on the unit
1
Hint on electrical hazardous area behind access plate
3.5 In Case of Accidents
Should you or another person be injured when working with the unit:
•Stay calm!
•Render first aid!
•Call the company first-aider without exception!
1

Product Description
Intended Use
14
Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
4 Product Description
4.1 Intended Use
The liquid-air cooler LA 5000 is used for the cooling of a liquid circuit. As a coolant water or a water/glycol
mixture may be used. The coolant circulates between the cooling unit and the device to be cooled. It is re-
cooled by an air-cooled heat exchanger. The maximum cooling capacity depends on the difference between
the ambient temperature and the temperature of the coolant forward flow. Its value is 5000 Watt for a
temperature difference of 12 K.
The unit is exclusively intended for use in industrial and commercial environments.
The intended use also includes the observance and following of all hints given in this Operation Manual.
4.2 Use not in Conformance with the Intended Use
Operation of the unit under improper operational conditions is not allowed, since otherwise the operation
safety can not be granted.
When using the unit in a way not compliant with the intended use, hazardous situations may occur.
Operation of the unit is not allowed under the following conditions:
•The unit is used for a purpose other than the one it is intended for.
•The unit or parts of it are damaged, the electrical installation is not correct or the insulation is broken.
•Protective or safety equipment is not functional or defect, improperly installed or missing.
•The unit is not working properly.
•Controlling devices were modified in a way that is not permitted.
•Operational parameters were changed in a way that is not permitted.
•Operation in areas exposed to explosion hazards
•Operation with cooling media not according to specification
•Use of unauthorized tools
•Exceedance of the compulsary maintenance intervals
PLEASE NOTE
The manufacturer is not liable for damage occuring when using the unit in a way it was not intended for.
When using the unit in a way it was not intended for, the manufacturer’s warranty given by LAIRD
THERMAL SYSTEMS will expire.

Product Description
Unit Components
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
4.3 Unit Components
Additional information can be retrieved from the flow scheme shown in the addendum. The unit consists of
the following main components:
Fig. 6: Main components
1
Heat exchanger
2
Tank for coolant
3
Pump
4
Casing
Cooling Circuit
In the cooling circuit the coolant is driven by the pump to the device that is to be cooled and back via the
return flow. The heat is dissipated into the ambient air by an air-cooled heat exchanger. Exceedance of the
maximum pump pressure is prevented by a by-pass circuit.
The liquid temperature is controlled by an electric thermostat, whereas liquid throughput is controlled by a
flow control device. Both indications are made potential-free and must be integrated into the safety circuit of
the device to be cooled.
4
1
3
2

Product Description
Specifications
16
Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
4.4 Specifications
Dimensions and weight
Length:
421 mm
Width:
537 mm (w/o hose nipples)
Height:
480 mm
Weight:
40 kg (empty)
Coolant capacity:
6.2 liter
Coolant:
Water or water (70%) / glycol (30%)
Table 4: Dimensions and weight
Performance data
Cooling capacity:
5.0 kW (100% Water)
Throughput:
> 6.0 lpm at 6.0 bar
Noise level @ 1m:
57dB(A) (50Hz)
Table 5: Performance data
Environmental conditions
Operating temperature:
+5°C ... +50°C (Water)
Operating temperature:
-10°C ... +50°C (Water 70%/Glycol 30%)
Operating relative humidity:
20% … 80%
Storage temperature:
-25°C ... +70°C (Empty)
Storage relative humidity:
10% … 95%
Table 6: Environmental conditions
Settings
Flow control device
4.0 ± 0.1 lpm (opening threshold)
Thermal switch
55°C 5°C tolerance, 15°C hysteresis
Maximum pressure
10.0 ± 0.5 bar
Table 7: Settings
Electrical characteristics
Mains voltage:
230±10% VAC, 1Ph, 50/60 Hz
Current draw:
3.3 A
Customer main fuse:
5 A T
Safety circuit, max input
230VAC, 0,5A, 15W
100VDC, 0,5A, 10W
Table 8: Electrical characteristics

Product Description
Setting-up Requirements
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
4.5 Setting-up Requirements
4.5.1 Installation Location
•The location must be even.
•When choosing the installation location the following must be kept in mind: the air flow of the cooling
air must not be restricted, forward and back flow connections must be easily accessable and all tubes
must be installed without sharp bends.
4.5.2 Environmental Conditions
CAUTION
Risk of damage through unsuitable environmental conditions.
Damage to property and corrosion damage may result and are not covered by manufacturer’s
liability.
•The unit is only authorized for use in indoor environments.
•The unit must not be stored or operated in agressive, humid environments.
•The unit must not be stored or operated outdoor.
Pay attention to the environmental conditions as given in the specifications on page 16.
4.5.3 Infrastructure
The following infrastructure is required for connecting the unit:
Parameter
Rated value
Operating voltage
230±10% VAC, 1Ph, 50/60 Hz
Table 9: Required infrastructure

Transport
Safety Indications for Transportation and Setting-up
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
5 Transport
5.1 Safety Indications for Transportation and Setting-up
CAUTION
Risk of injury by lifting the unit!
The weight of the unit is almost 40 kg.
•Do not lift the unit manually!
•Always use proper auxiliary means such as a forklift or a jack lift!
5.2 Transportation of the Unit
The unit is delivered shrinked in foil on a transportable pallet. Leave the unit on the pallet until bringing it into
service. Use a forklift or jack lift for transportation to the installation location.
5.3 Unpacking
Remove the foil before setting up the unit!
Inspect the unit with regards to:
•Damage caused by transportation
•Completeness of delivery
Lift the unit with a forklift or jack lift off the transportable pallet.
Dispose of the packaging material in accordance with regional regulations.
PLEASE NOTE
LAIRD THERMAL SYSTEMS advises to keep the transportable pallet for later transportation of the unit.

Initial Operation
Safety Indications Related to Initial Operation
19
Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
6 Initial Operation
6.1 Safety Indications Related to Initial Operation
CAUTION
Danger of malfunction caused by faulty connections during initial operation!
Before switching on the unit make sure that
•all safety equipment of the unit is implemented and functional
•all connections were properly made
Please follow the rules in chapter Safety Regulations on page 9.
6.2 Setting to Work
6.2.1 Placement
Fig. 7: Minimum clearance for air entrance and air exit
1
Ventilation grid
1) Move the unit to its installation location as mentioned in chapter 5.2.
2) Place the unit in a way that air entrance and air exit are not obstructed. Wall clearance must not be less
than 0.5 m, otherwise cooling capacity may be restricted. Unit should not be installed in a corner as hot
air can be recirculated into the cooler.
PLEASE NOTE
In case of storage of the unit at temperatures lower than 5°C or higher than 40°C for longer periods please
wait 3 hours prior to initial operation to allow for temperature adjustment.
1
1
0.5 m min.
min.minmminmini
0.5 m min.
min.minmminmini

Initial Operation
Setting to Work
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Laird Thermal Systems s.r.o
Operation Manual, 387009851
Date: 08/09/2022
Version: 1.0
Liquid-Air Cooling Unit LA 5000
387009381
6.2.2 Cooling Circuit Connection and Filling
CAUTION
Risk of damage by using improper cooling hoses!
This may lead to damage to persons, damage to the unit or corrosion damage.
•When choosing cooling hoses pay attention to sufficient burst strength and compatibility with coolant!
•Only use cooling hoses without any signs of damage!
The cooling hoses with an internal diameter of 9 mm are connected to the unit by means of hose nipples.
Liquid outlet and liquid inlet are indicated with respective symbols.
Fig. 8: Labeling of liquid inlet and liquid outlet
1) Connect a suitable hose to the hose nipples for liquid inlet and liquid outlet and secure it with a clamp
respectively.
2) Connect the hoses to the corresponding nipples of the device to be cooled.
PLEASE NOTE
When connecting the cooling hoses pay attention to flow direction. Follow the documentation released by
the manufacturer of the device to be cooled.
Transparent hoses stimulate algae growth that may increase the error-proneness of the components built
into the unit. Thus only use non-transparent hoses.
Fig. 9: Cap of coolant container
1
Cap
Liquid inlet
Liquid outlet
1