WL 500 - Laird Technologies

WL 500
User Manual
Innovative Technology
for a Connected World
CAUTION: READ MANUAL BEFORE OPERATING COOLING UNIT
– Input power must be rated 230 VAC at 50/60 Hz .
– Use Water or Water/Glycol as coolant .
– Run the cooling unit at the correct coolant level,
otherwise the cooling capacity will be reduced.
– Use cooling hoses that can handle max pressure of the
liquid circuit and is resistant to corrosion from coolant.
– Never operate the unit if it is damaged or leaking.
– Before starting any service work on the cooling unit,
please disconnect from the main power source.
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Laird Technologies Liquid Cooling Systems
[email protected]
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WL 500
1213.61BE
Page 1 / 8 WL 500
Liquid Cooling System
User
Manual
Table of contents
Pg No.
1Description
2
2 Technical data
3
2.1 Physical dimensions
3
2.2 Performance data
3
2.3 Mounting
3
2.4 Environmental specifications 3
2.5 Settings
3
3 Operational setting
4
4Settings
5
5
4.1 Flow settings
5Maintenance
5
5
5.1 Heat Exchanger
6 Liquid circuit diagram
6
7 Electronic schematic
7
8 Spare part list and Illustration
8
Description
The WL 500 cooling unit is intended to remove heat from a liquid circuit. The coolant can
be either water or a mixture of water and water-glycol (antifreeze). Water circulates in a
closed loop between the ambient cooling system and a cold plate at the heat source. Heat
is removed from water by an air-cooled heat exchanger. The capacity of the cooling unit
is dependent on the temperature differential, which is defined as the difference between
the ambient temperature and the water outlet temperature. The cooling unit is designed to
remove 500 W of heat at a temperature differential of 13°C. The water inlet and water outlet
are marked as WATER IN and Water OUT.
The maximum forward pressure is limited by a bypass valve, which has been integrated
into the pump. The coolant flow is controlled by a flow switch that opens when flow falls
below a set rate. Cooling hoses supplied by user are connected to threaded nozzle that can
accommodate an 8 mm hose ID.
The water flow is monitored by an adjustable flow switch. The signal of the flow switch is
available at a potential free safety circuit. The permissible contact rating for the safety circuit is
125 VAC/1A/50 VA.
A bypass valve limits the water pressure.
Note: Flow switch and bypass valve are adjusted at factory and set according to specification.
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WL 500
Liquid Cooling System
User
Manual
2 technical data
2.1 Physical dimensions
• Length: 370 mm
• Width: 307 mm
• Height: 151 mm
• Weight: 11 kg without filling
• Coolant capacity: 1.7 L
2.2 Performance data
• Cooling capacity: 500 W
• Flow rate: 2.3 L/min at 1 bar
• Supply voltage: 230 V / 50/60 Hz
• Current consumption: 1,2 A
• Noise level: ≤ 60 dB(A) distance 1 m in any direction
• Contact rating of safety circuit (make): 250 Vac, 0.5 A, 50 VA
2.3 MOUNTING
• Mount on vertical wall with filling cap facing up
Mechanical fasten with four M5 x 40 mm machine screws and washers
2.4 ENVIRONMENTAL SPECIFICATIONS
• Ambient temperature: + 5°C...+ 40°C
• Storage temperature: - 25°C...+ 70°C (storage without water)
• Air humidity: 20%...80%
2.5 SETTINGS
• Maximum forward pressure: 2.5 bar
• Flow switch open: ≤ 0.9 l/min
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WL 500
Liquid Cooling System
User
Manual
3 operational settings
1.Position cooling unit vertically and keep
filling cap upright.
2. Remove the filling cap.
3.Connect the external hoses supplied by
the user.
4.Insert the cable and connect it to the
terminals according to the terminal
diagram; use a 3 mm screwdriver to
connect the wires to terminal block.
5.Fill the cooling unit with approximately
1.7 L of coolant.
The level has to be always between
MAXIMUM and MINIMUM
Filling level MAXIMUM
Filling level MINIMUM
Note: Cooling performance will be reduced and pump will
degrade if filling level is less than Minimum.
6. Allow the cooling unit to run for 10 minutes and deaerate the
liquid circuit.
7. Check the coolant level. If necessary, refill the coolant.
8. Replace the filling cap.
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WL 500
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4 SETTINGS
Note: The flow switch is factory adjusted to 0.9 l/min.
If it is necessary to change these setting, refer to the following
4.1 Flow Switch
The flow switch is set to open at 0.9 lpm. If it is necessary to adjust this setting then perform the following:
1. Disconnect the cooling unit from the main power source.
2. Remove the complete cover.
3. Adjust set screw to: - Increase the flow rate set point by adjusting the screw clockwise.
- Decrease the flow rate set point by adjusting the set screw counter clockwise.
Set Screw
5Maintenance
Check the coolant level regularly and refill if necessary.
5.1 HEAT EXCHANGER
In order to achieve maximum cooling capacity the heat exchanger of the cooling unit must be kept clean.
Check heat exchanger every 3 months for cleanliness. If cleaning is required perform the following:
1. Disconnect the cooling unit from the the main power source.
2. Remove the side cover.
3. Clean the heat exchanger with compressed air, a damp cloth or a shop vacuum.
4. Mount the side cover.
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WL 500
Liquid Cooling System
User
Manual
6 Liquid Circuit Diagram
Flow controller
Heat exchanger
Inlet nozzle
Pump with electric motor
Outlet nozzle
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WL 500
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7 Electronic Schematic
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WL 500
Liquid Cooling System
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Manual
8 Spare Part List and Illustration
No.
Description
Code number
1
Motor, 0,075/0,09 kW, 230 V±10%
92110028
2
Pump CO 1505 PXDF
93500304
3
Fan, 230 V, 18 W
95250308
4
Filling cap
12428410
4
1
3
2
THR-UM-WL-500 0412
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not be liable for incidental or consequential damages of any kind. All Laird Technologies products are sold pursuant to the Laird Technologies’ Terms and Conditions of sale in effect from time to time, a copy of which will be furnished
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