Laird WL 5000 Installation instructions

WL 5000
Specification and User Manual

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www.lairdthermal.com
Any information furnished
by Laird and its agents, whether in specifications, data sheets, product catalogues or otherwise, is
believed to be (but is not warranted as being) accurate and reliable, is provided for information only and does not form part
of any
contract with Laird.
All specifications are subject to change without notice. Laird assumes no responsibility and disclaims all liability
for losses or damages resulting from use of or reliance on this information. All Laird products are sold subject to the Laird
Terms
and Con
ditions of sale (including Laird’s limited warranty) in effect from time to time, a copy of which will be furnished upon
request.
© Copyright 2019
-2021 Laird Thermal Systems, Inc. All rights reserved. Laird™, the Laird Ring Logo, and Laird Thermal
Systems™ are trademarks or registered trademarks of Laird Limited or its subsidiaries.

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Table of Contents
1History of changes............................................................................................................. 5
2About this Manual.............................................................................................................. 7
2.1 Terms of Guarantee............................................................................................................ 7
2.2 Contact Information ............................................................................................................. 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
3.3.4 Protective Clothing .................................................................................................................................11
3.4 Safety Equipment .............................................................................................................. 12
3.4.1 Guards....................................................................................................................................................12
3.5 In Case of Accidents ......................................................................................................... 12
4Product Description......................................................................................................... 13
4.1 Description........................................................................................................................... 13
4.2 Non-Conformity with the Intended Use........................................................................ 13
4.3 Technical data .................................................................................................................... 14
4.3.1 Physical dimensions...............................................................................................................................14
4.3.2 Performance data...................................................................................................................................14
4.3.3 Environmental specifications .................................................................................................................14
4.3.4 Settings...................................................................................................................................................14
4.4 Setting-up Requirements.................................................................................................15
4.4.1 Installation Location ...............................................................................................................................15
4.4.2 Environmental Conditions ......................................................................................................................15
4.4.3 Infrastructure ..........................................................................................................................................15
5Initial Operation ................................................................................................................ 16
5.1 Safety Indications Related to Initial Operation ........................................................... 16
5.2 Setting to Work ................................................................................................................... 16
5.2.1 Connecting the unit electrically ..............................................................................................................16
5.2.2 Carrying out Setting-to-Work .................................................................................................................16
6Maintenance and Cleaning ........................................................................................... 18
6.1 Heat exchanger .................................................................................................................. 18
6.2 Pump..................................................................................................................................... 18
6.3 Cleaning of Unit Casing ................................................................................................... 19
7Repair .................................................................................................................................20

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8Removal for Service........................................................................................................ 21
9Wear Parts and Spare Parts......................................................................................... 22

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Revision History
Date
Index
Reason for Change
Name
Page
13-Apr-20
1.0
First version
22-May-20
2.0
New template. Page no. Updated.
A. Olsson
10-MAR-2021
2.1
Corrected P/N
A. Kim
06-OCT-2021
2.2
New template
A. Chomat

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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 accessible 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 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 devices 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 will lead to the termination of warranty as well the termination of the
declaration of conformation and will free LAIRD 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 implementation of the safety devices required.

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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:
See contact details at www.lairdthermal.com

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2. Safety Regulations
2.1 Hazard Classes
In this document safety instructions are using standardized representation and symbols. Depending
on the probability of their incidence and the severity of consequences three hazard classes are used.
DANGER
Reference to direct danger for humans.
Inobservance will lead to irreversible injuries or death.
CAUTION
Reference to noticeable danger for humans or possible damage to property.
Inobservance may lead to reversible injuries or to damage to property.
2.2 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
Symbol
Meaning
This symbol indicates the requirement of wearing safety gloves
This symbol indicates the requirement of disconnecting from mains.

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2.3 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 operation save. It was built according to the state-of-the-art.
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
2.3.1 Prevent Hazards
Hazards can be prevented by safety-conscious and anticipatory behavior of staff.
Everybody working with the unit should keep the following in mind:
•Make this Operation Manual available for everybody at the operation site of the unit in a
complete and perfectly readable state!
•Use the unit exclusively for what it was intended!
•The unit must be operational and error free. 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 accident prevention regulations as well as any regional regulations!
2.3.2 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 must be observed.
•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 save
operation. All intended changes must be authorized by the manufacturer.

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•After the implementation of a change the operation of the safeguards must be verified.
•No unauthorized changes on the unit are allowed. All intended changes must be authorized by
the manufacturer.
2.3.3 Environmental Issues
Environmentally conscious and anticipatory behavior of staff avoids environmentally hazardous
impacts.
The following principles apply for environmentally conscious behavior:
•Environmentally hazardous substances must not get into the soil or into the drains. They should
be kept in appropriate containers.
•Environmentally hazardous substances must be brought to utilization or disposal according to
regional regulations.
When dealing with working fluids always keep aware of the safety data sheet of the corresponding
manufacturer.
2.3.4 Protective Clothing
When doing a job that leads to contact of the skin with the coolant (e.g. filling-up of the coolant
container):
Wear safety gloves made of PVC, neoprene or nitrile rubber

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2.4 Safety Equipment
PLEASE NOTE
The safety equipment listed below must be integrated in the local control environment by the customer,
unless otherwise noted. These tasks must be carried out solely by trained experts.
Safety equipment must not be modified, removed or taken out of operation. All parts of the safety
equipment must be accessible at all times.
2.4.1 Guards
Direct access to hazardous parts or areas of the unit is restricted by the unit cover. The cover may
only be removed for maintenance or repair works and shall be replaced prior to taking the unit back to
operation. The cover is fixed by screws which can be unscrewed using a metric wrench.
2.5 In Case of Accidents
Should you or another person be injured when working with the unit:
•Stay calm!
•Give first aid!
•Call the company’s first-aider without exception!

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3. Product Description
3.1 Description
The cooling unit WL 5000 S is intended for the cooling of a water circuit. The coolant can be water or
a mixture of water and antifreeze (water-glycol). Water circulates between the cooling unit and the
heat source. The water is re-cooled by an air-cooled heat exchanger. A bypass valve limits the pump
pressure.
The capacity of the cooling unit depends on the temperature difference between the ambient
temperature and the water outlet temperature. The cooling capacity has an amount of 5000 W related
to a difference of 13,2 K between water outlet temperature and ambient temperature.
Cooling hoses are connected to the cooling unit via hose nipples.
Coolant inlet and outlet are marked with symbols: Inlet: ↓and outlet: ↑
3.2 Non-Conformity with the Intended Use
Operation of the unit under improper operational conditions is not permitted, 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 permitted 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.
•The unit was modified without authorization or modified in a way that is not permitted.
•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 compulsory maintenance intervals.
PLEASE NOTE
The manufacturer is not liable for damage occurring when using the unit in a way it was not intended.
When using the unit in a way it was not intended for, the manufacturer’s warranty given by LAIRD will
expire.

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3.3 Technical data
Coolant: water or water-glycol
3.3.1 Physical dimensions
Length:
483 mm
Width:
406 mm
Height:
481 mm
Weight:
38.5 (empty)
Coolant capacity:
5.0 l
Table 1: Dimensions and weight
3.3.2 Performance data
Cooling capacity:
5000 W (ΔT ≤ 13.2 K)
Flow rate:
6.5 l/min at 3.0 bar
Main voltage:
230 V ± 10% / 50/60 Hz
Current consumption:
≤ 2.6 A
Noise level:
63 dB(A) (50 Hz)
67 dB(A) (60 Hz) at 1 m distance in any
direction
Table 2: Performance data
3.3.3 Environmental specifications
Operating temperature:
-10°C...+ 40°C (with adequate amount of
antifreeze)
Storage temperature:
-25°C...+ 70°C (storage without water)
Relative humidity:
20%...90%
Table 3: Environmental conditions
3.3.4 Settings
Maximum forward pressure:
6.0 bar ± 0.2 bar
Flow switch:
open at ≥4l/min Hysteresis < 0.8 l/min
Termal switch:
50°C ± 3°C Hysteresis ≤ 10°C

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3.4 Setting-up Requirements
3.4.1 Installation Location
•The cooling unit must be positioned horizontally for sufficient air circulation without blocking the
air openings.
3.4.2 Environmental Conditions
CAUTION
Risk of damage through unsuitable environmental conditions!
Damage to the unit 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 aggressive, humid environments.
•The unit must not be stored or operated outdoor.
Pay attention to the environmental conditions as given in the specifications in section 4.3.3
3.5 Infrastructure
The following infrastructure is required for connecting the unit:
Parameter
Rated value
Operating voltage
230 VAC 50/60 Hz

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4. Initial Operation
4.1 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.
•Nobody is endangered by the start-up of the unit.
•Only cooling hoses with enough pressure resistance and with compatibility with used coolant is used!
•Run cooling unit always with correct coolant level above cooling fins inside the heat exchanger
•Read the manual before setting to work.
Moreover:
•Never operate cooling unit when ball cock is closed, otherwise damage of pump may occur!
•Never operate damaged or leaking equipment!
Please follow the rules in chapter Safety Regulations on page 9.
4.2 Setting to Work
4.2.1 Connecting the unit electrically
DANGER
Electrical danger!
Work on electrical installations may be carried out by trained and authorized electricians only.
Switch off the unit before starting your work.
Disconnect the unit from mains by pulling the mains plug.
Secure the unit against being switched on again.
Verify that the unit is disconnected.
Carry out earthing and short circuiting.
Keep unauthorized persons away from the working area.
NOTE
Risk of damage through improper connections!
Improper integration of the unit into the safety circuit of the device to be cooled will lead to
the inoperativeness of the safety equipment included in the unit.
Ensure that all connected safety equipment is properly functioning.
All tasks should be carried out only by expert staff.
4.2.2 Carrying out Setting-to-Work
•The cooling unit must be positioned horizontally for sufficient air circulation without
blocking the air openings
•Remove service cap

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•Insert cable and connect cable to terminals according to terminal diagram
•Close service cap
•Connect the cooling unit with hoses
•Open lid
•Fill cooling unit with water (about 5.0 l)
CAUTION
The water level must be always above fins, otherwise reduced cooling capacity!
•Let the cooling unit run for about 10 minutes to deaerate the water circuit
•Check the water level, if necessary, refill water
•Close lid
Position of closing lid and electrical connectors

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5. Maintenance and Cleaning
Diligent maintenance is the prime factor for assuring an error-free and efficient operation of
the unit. Operating personnel can perform these tasks when properly trained.
Regularly check the water level and refill water and antifreeze, if necessary.
5.1 Heat exchanger
In order to achieve maximum cooling capacity keep the heat exchanger of the cooling unit
clean. Regularly check it and if necessary clean it:
Proceed as following:
1. Disconnect cooling unit from the mains
2. Remove complete cover
3. Remove dust by forcing it out in the opposite direction from which it entered. If
compressed air is available, direct the air against the inside of the heat exchanger
4. Mount cover
5.2 Pump
About every 3 months check the filter of the pump for clean condition, in case of polluted
water, more often.
CAUTION
Clean filter regularly according to maintenance instructions, otherwise damage of pump
may occur!
Proceed as following:
1. Disconnect cooling unit from the mains
2. Remove cover
3. Close ball cock
4. Unscrew filter cap (24 mm nut)
Note: Some water will run out of pump. Collect the water with suitable vessel!
5. Remove and clean filter if necessary or replace filter
6. Insert filter and mount cap
7. Open ball cock
CAUTION
Never operate cooling unit when ball cock is closed, otherwise damage of pump may
occur!
8. Mount cover
9. Run cooling unit to deaerate cooling circuit (Setting to work)
10. Check water level and refill if necessary

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Position of close ball cock and filter cap
5.3 Cleaning of Unit Casing
CAUTION
Risk of damage due to the use of improper cleansing material!
When using aggressive or abrasive cleaning agents, corrosion may occur as result of a damaged
paint film.
•For cleaning the device casing only use mild cleaning agents (e.g. dish washing detergents)!
•Use clean and lint free cloth for cleaning!
Regularly remove dirt from the casing of the unit to prevent corrosion damage. Pay attention that all
the labels at the unit are always clean and legible.

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6. Repair
PLEASE NOTE
Do not carry out any repair work on the unit. Send the unit back to the LAIRD service department (for
contact see page 7).