Lauda WK 500 User manual

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LAUDA DR. R. WOBSER
GMBH & CO.KG
P.O. Box1251
D-97912 Lauda-Königshofen
from series Y01 Phone: [phone]
12/01 Fax: [phone]
YAWE0019 E-mail info @ lauda.de
Internet http://www.lauda.de
Operating instructions
LAUDA Water Circulation coolers
WK 500, WK 502, WK 1200,WK 1400
WK 2200, WK 2400, WK 3200, WK 4600,
WK 7000 (W), WK 10000 (W),
WKL 230, WKL 600, WKL 603, WKL 700,
WKL 703, WKL 1200, WKL 2200, WKL3200
WKL 4600, WKL 7000 (W), WKL 10000 (W)
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 3 -
1. BRIEF OPERATING INSTRUCTIONS ................................................................................. 4
2. TECHNICAL DATA............................................................................................................... 5
3. BASIC CONSTRUCTIN AND TECHNICAL DESCRIPTION............................................... 10
4. SAFETY DEVICES AND WARNING NOTES..................................................................... 15
4.1 Safety devices...............................................................................................................................................15
4.2 Warning notes...............................................................................................................................................15
5. BATH LIQUIDS AND HOSE CONNECTIONS.................................................................... 16
5.1 Bath liquids ...................................................................................................................................................16
5.2 Hose connections (by the metre)................................................................................................................17
6. UNPACKING, ASSEMBLY AND SETTING UP.................................................................. 18
7. FILLING AND CONNECTION OF EXTERNAL CONSUMING DEVICES........................... 19
8. STARTING UP.................................................................................................................... 20
9. MAINTENANCE.................................................................................................................. 21
9.1 Maintenance of the refrigeration unit .........................................................................................................21
9.2 Safety devices in case of repairs ................................................................................................................21
9.3 Repair and disposal instruction..................................................................................................................22
9.4 Cleaning.........................................................................................................................................................22
9.5 Spares ordering ............................................................................................................................................22
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 4 -
1. Brief operating instructions
Even if you find these brief instructions initially sufficient please read the subsequent sections, especially
Section 4: "Safety devices and warning notes".
Check the Water circulation cooler and accessories during unpacking for any transport damage and if
necessary inform the carrier.
Assemble the unit according to Section 6 and add extra items as appropriate.
When setting up the unit there must be a spacing of at least 0,5 m between the grills and any object which
could interfere with ventilation.
With the pump connections open fill the bath up to the top mark on the level indication: in the case of
WK 230 up to about 20 mm below the bath cover plate. Check that the drain valve on the back wall is
closed.
Connection of the hoses to the pump connections:
Connect the connecting hose to the external device. Protect the tubes with hose clips against slipping off.
Use only tubes suitable for the liquid used and for the maximum operating pressure!
Check the supply voltage against the details on the label. Insert the mains plug.
Test the sense of rotation of the three-phase alternating current connection at WKL 7000 (W) and
WKL 10000 (W).
Check that the tube connections have been made according to Item 1.5 and that the unit has been filled
according to Item 1.4! Switch on the mains switch (I). The temperature indicator on the control panel shows
the current bath temperature.
Press the key , the operating temperature setpoint appears on the display.
Set the temperature with the keys or .
Enter the new value with the key .
The indication shows if the compressor is running, i.e. if the unit is being cooled down or not.
The pressure gauge shows the pump pressure at the outflow connection (outlet) of the unit. The pressure
can be adjusted with the bypass valve at the back of the unit (see 8.4). Not on WKL 230, WK 500, WK 502,
WKL 600, WKL 603, WKL 700 und WKL 703!
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 5 -
2. Technical Data
Type WK 500 WK 502 WK 1200 WK 1400 WK 2200 WK 2400
Working temperature range [ °C ] 0...40 0...40 0...40 0...40 0...40 0...40
Condenser cooling air air air air air air
Ambient temperature range [ °C ] 5...40 5...40 5...40 5...40 5...40 5...40
Temperature (outflow)
Sensor PTC
Indication green 7-Segment-LED-display
Resolution/accuracy: [ °C ] 0,1 / ±0,3*) 0,1 / ±0,3*) 0,1 / ±0,3*) 0,1 / ±0,3*) 0,1 / ±0,3*) 0,1 / ±0,3*)
Setpoint adjustment Digital Digital Digital Digital Digital Digital
Auflösung [ °C ] 0,1 0,1 0,1 0,1 0,1 0,1
Temperature accuracy [ ±°C ] 0,5*) 1*) 0,5*) 0,5*) 1*) 1*)
Control Compr. On-Off, with stop interval monitoring
Eff. cooling capacity 20°C [ kW ] 0,5 0,6 1,2 1,4 2,2 2,4
(with Ethanol ambient 10°C 0,3 0,5 0,9 1,1 1,6 1,8
temperature 20°C) 5°C 0,18 0,4 0,6 0,8 1,2 1,4
0°C 0,05 0,3 0,28 0,5 0,8 1,0
Safety devices Pressure switch, Winding temperature control
Level indication, adjustable alarm contact (/max. 30V, 2A)
Pump output max. 30 33 40 30 40 30
Discharge pressure max. [ bar ] 1 2,2 3,2 1 3,2 1
Pump connections
(for tubing) [ i.d. ] M 16x1 10 (½“) M 16x1 10 (½“) G ¾“ 15 (¾“) G ¾“ 15 (¾“) G ¾“ 15 (¾“) G ¾“ 15 (¾“)
Supply pressure
Indication / Range
Adjustment
[ bar ] analogue / 0...6
adjustable bypass for pressure limitation
Filling capacity max. [ l ] 12 12 23 23 23 23
Overall dimensions (B x T x H) [ mm ] 350x480x
595 350x480x 715 450x550x 790 450x550x 790 450x550x 790 450x550x 790
Weight [kg]465075698781
Protection to DIN 40050 IP 32 IP 32 IP 32 IP 32 IP 32 IP 32
Mains connection [ V;Hz ] 230; 50 230; 50 230; 50 230; 50 230; 50 230; 50
Power consumption [ kW ] 0,47 0,9 1,2 1,0 1,6 1,4
Protection class 1 according to DIN VDE 0106
Units conform to EU Guideline 89/336/EWG (EMC) and 73/23/EWG (low
voltage) and carry the CE mark (230V;50Hz)
Class according to
EMC-standards 61326-1 *)
(Notice only valid for EU-
countries)
B B B* B* B* B*
Ref-No.:
230V; 50Hz LWG 132 LWG 140 LWG 133 LWG 137 LWG 134 LWG 138
230V; 60Hz LWG 232 ----- LWG 233 LWG 237 LWG 234 LWG 238
*) see 4.2
We reserve the right to make technical alterations!
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 6 -
Type WK 3200 WK 4600 WK 7000 WK 7000 W WK 10000 WK 10000 W
Working temperature range [ °C ] 0...40 0...40 0...40 0...40 0...40 0...40
Condenser cooling air air air water air water
Ambient temperature range [ °C ] 5...40 5...40 5...40 5...40 5...40 5...40
Temperature (outflow)
Sensor PTC
Indication green 7-segment-LED-display
Resolution/accuracy [ °C ] 0,1 / ±0,3*) 0,1 / ±0,3*) 1 / ±1*) 1 / ±1*) 1 / +1*) 1 / +1*)
Setpoint selection Digital Digital Digital Digital Digital Digital
Resolution [ °C ] 0,1 0,1 1 1 1 1
Temperature accuracy [ ±°C ] 1*) 1*) 1*) 1*) 1*) 1*)
Control Compr. On-
Off, with stop
interval
monitoring
alternating solenoid valves
Eff. cooling capacity 20°C [ kW ] 3,5 4,6 7,0 7,0 10,0 10,0
(with Ethanol ambient 10°C 3,0 3,4 6,0 6,0 9,0 9,0
temperatur 20°C) 5°C 2,3 2,3 5,5 5,5 8,2 8,2
0°C 1,2 1,2 5,0 5,0 7,3 7,3
Safety devices Pressure switch, Winding temperature control
Level indication, adjustable alarm contact (max. 30 V, 2A)
Pump output max. 40 40 60 60 60 60
Discharge pressure max. [ bar ] 3,2 3,2 3,2 3,2 3,2 3,2
Pump connections
(for tubing) [ i.d. ] G ¾“ 15 (¾“) G ¾“ 15 (¾“) G ¾“ 15 (¾“) G ¾“ 15 (¾“) G ¾“ 15 (¾“) G ¾“ 15 (¾“)
Supply pressure
Indication / Range
Adjustment
[ bar ] analogue / 0...6
adjustable bypass for pressure limitation
Filling capacity max. [ l ] 45 45 45 45 45 45
Overall dimensions (B x T x H) [ mm ] 550x650x
970 550x650x 970 850x670x 970 850x670x 970 1050x770x 1120 850x670x 970
Weight [ kg ] 120 123 172 177 233 240
Protection to DIN 40050 IP 32 IP 32 IP 32 IP 32 IP 32 IP 32
Mains connection [ V;Hz ] 230/400;
3/N/PE 50 230/400; 3/N/PE 50 230/400; 3/N/PE 50 230/400; 3/N/PE 50 230/400; 3/N/PE 50 230/400; 3/N/PE 50
Power consumption [ kW ] 2,0 2,5 5,0 4,7 6,5 6,0
Protection class 1 according to DIN VDE 0106Units conform to EU Guideline 89/336/EWG (EMC)
and 73/23/EWG
(low-voltage) and carry the CE mark (230 V; 50 Hz or 230/400 V;
3/N/PE 50 Hz)
Class according to
EMC-standards 61326-1 *)
(Notice only valid for EU-
countries)
AAAA A A
Ref-No.:
230V; 3/PE 60Hz LWG 135 LWG 136 ----- ----- ----- -----
230/400V; 3/N/PE 50Hz LWG 235 LWG 236 LWG 245 LWG 247 LWG 249 LWG 251
440/480V; 3/PE 60Hz ----- ----- LWG 645 LWG 647 LWG 649 LWG 651
*) see 4.2
We reserve the right to make technical alterations!
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 7 -
Type WKL 230 WKL 600 WKL 603 WKL 700 WKL 703 WKL 1200 WKL 2200
Working temperature range [ °C ] -10...40 -25...40 -20...40 -9,9...40 -5...40 -10...40 -10...40
Condenser cooling air air air air air air air
Ambient temperature range [ °C ] 5...35 5...40 5...40 5...40 5...40 5...40 5...40
Temperature (outflow)
Sensor PTC
Indication green 7-Segment-LED-Display
Resolution/accuracy [ °C ] 0,1 / ±0,3*) 1 / ±1*) 1 / ±1*) 0,1 / ±0,3*) 0,1 / ±0,3*) 0,1 / ±0,3*) 0,1 / ±0,3*)
Setpoint selection Digital Digital Digital Digital Digital Digital Digital
Resolution [ °C ] 0,1 1 1 0,1 0,1 0,1 0,1
Temperature accuracy [ ±°C ] 0,5*) 1*) 1*) 1*) 1*) 0,5*) 1*)
Control Compr. ON-OFF, with stop interval monitoring
Eff. Cooling capacity 20°C [ kW ] 0,23 0,6 0,5 0,7 0,55 1,2 2,2
(with Ethanol at 10°C 0,19 0,5 0,4 0,55 0,4 1,0 1,8
ambient 5°C 0,18 0,45 0,35 0,48 0,33 0,9 1,6
temperature 20°C) 0°C 0,16 0,40 0,3 0,40 0,25 0,8 1,4
-5°C ----- ----- ----- 0,24 0,1 0,7 1,2
-10°C 0,1 0,25 0,19 0,1 ----- 0,6 1
-15°C ----- ----- 0,13 ----- ----- ----- -----
-20°C ----- 0,17 0,05 ----- ----- ----- -----
-25°C ----- 0,1 ----- ----- ----- ----- -----
Safety devices Pressure switch, Winding temperature control
Level indication, adjustable alarm contact (max. 30 V, 2A)
Pump output max. 8 30 33 30 33 40 40
Discharge pressure max. [ bar ] 0,15 1 3,2 1 3,2 3,2 3,2
Pump connections
(for tubing) [ i.d. ] Ø 10 8M 16x1 10 (½“) M 16x1 10 (½“) M 16x1 10 (½“) M 16x1 10 (½“) G ¾“ 15 (¾“) G ¾“ 15 (¾“)
Supply pressure
Indication / Range
Adjustment
[ bar ] analogue / 0...6
adjustable bypass for pressure limitation
Filling capacity max. [ l ] 6 11 11 12 12 23 23
Overall dimensions (B x T x H) [ mm ] 200x350x
500 350x480x 595 350x480x 715 350x480x 595 350x480x 715 450x550x 790 450x550x 790
Weight [kg]24465046507569
Protection to DIN 40050 IP 32 IP 32 IP 32 IP 32 IP 32 IP 32 IP 32
Mains connection [ V;Hz ] 230;50/60 230;50 230;50 230;50 230;50 230;50 230;50
Power consumption [ kW ] 0,3 0,7 0,9 0,7 0,9 1,6 2,2
Protection class 1 according to DIN VDE 0106Units conform to EU Guideline 89/336/EWG (EMC)
and 73/23/EWG
(low-voltage) and carry the CE mark (230 V; 50 Hz or 230/400 V;
3/N/PE 50 Hz)
Class according to
EMC-standards 61326-1 *)
(Notice only valid for EU-
countries)
BBBBBB*B*
Ref-No.:
230V; 50Hz ----- LWG 141 LWG 142 LWG 143 LWG 144 LWG 153 LWG 154
230V; 60Hz ----- LWG 241 LWG 242 LWG 243 LWG 244 ----- -----
230V; 50/60Hz LWM 016 ----- ----- ----- ----- ----- -----
*) see 4.2
We reserve the right to make technical alterations!
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 8 -
Type WKL 3200 WKL 4600 WKL 7000 WKL 7000 W WKL 10000 WKL 10000 W
Working temperature range [ °C ] -10...40 -10...40 -25...40 -25...40 -25...40 -25...40
Condenser cooling Luft Luft Luft Wasser Luft Wasser
Ambient temperature range [ °C ] 5...40 5...40 5...40 5...40 5...40 5...40
Temperature (outflow)
Sensor PTC
Indication green 7-Segment-LED-Display
Resolution/accuracy [ °C ] 0,1 / ±0,3*) 0,1 / ±0,3*) 1 / ±1*) 1 / ±1*) 1 / ±1*) 1 / ±1*)
Setpoint selection Digital Digital Digital Digital Digital Digital
Resolution [ °C ] 0,1 0,1 1 1 1 1
Temperature accuracy [ ±°C ] 1*) 1*) 1*) 1*) 1*) 1*)
Control Compr. ON-
OFF, with
stop interval
monitoring
alternating solenoid valves
Eff. Cooling capacity 20°C [ kW ] 3,5 4,6 7,0 7,0 10,0 10,0
(with Ethanol at 10°C 2,8 3,6 6,0 6,0 9,0 9,0
ambient 5°C 2,4 3,1 5,5 5,5 8,2 8,2
temperature 20°C) 0°C 2,0 2,6 5,0 5,0 7,3 7,3
-5°C 1,7 2,1 4,0 4,0 ----- -----
-10°C 1,4 1,7 3,0 3,0 5,1 5,1
-15°C ----- ----- 2,4 2,4 ----- -----
-20°C ----- ----- 1,7 1,7 3,0 3,0
-25°C ----- ----- 1,0 1,0 2,2 2,2
Safety devices Pressure switch, Winding temperature control
Level indication, adjustable alarm contact (max. 30 V, 2A)
Pump output max. 40 40 60 60 60 60
Discharge pressure max. [ bar ] 3,2 3,2 6,0 6,0 6,0 6,0
Pump connections
(for tubing) [ l.W. ] G ¾“ 15 (¾“) G ¾“ 15 (¾“) G 1¼“ 20 (1“) G 1¼“ 20 (1“) G 1¼“ 20 (1“) G 1¼“ 20 (1“)
Supply pressure
Indication / Range
Adjustment
[ bar ] analogue / 0...6
adjustable bypass for pressure limitation
Filling capacity max. [ l ] 45 45 45 45 45 45
Overall dimensions (B x T x H) [ mm ] 550x650x
970 550x650x 970 850x670x 970 850x670x 970 1050x770x 1120 850x670x 970
Weight [ kg ] 120 123 175 180 235 242
Protection to DIN 40050 IP 32 IP 32 IP 32 IP 32 IP 32 IP 32
Mains connection [ V;Hz ] 230/400;
3/N/PE 50 230/400; 3/N/PE 50 230/400; 3/N/PE 50 230/400; 3/N/PE 50 230/400; 3/N/PE 50 230/400; 3/N/PE 50
Power consumption [ kW ] 2,8 3,5 5,5 5,2 7,0 6,5
Protection class 1 according to DIN VDE 0106Units conform to EU Guideline 89/336/EWG (EMC)
and 73/23/EWG
(low-voltage) and carry the CE mark (230 V; 50 Hz or 230/400 V;
3/N/PE 50 Hz)
Class according to
EMC-standards 61326-1 *)
(Notice only valid for EU-
countries)
AAAA A A
Ref-No.:
230V;3/PE 60Hz LWG 155 LWG 156 ----- ----- ----- -----
230/400V; 3/N/PE 50Hz LWG 255 LWG 256 LWG 246 LWG 248 LWG 250 LWG 252
440/480V; 3/PE 60Hz ----- ----- LWG 646 LWG 648 LWG 650 LWG 652
*) see 4.2
We reserve the right to make technical alterations!
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 9 -
Entleerungshahn
Drain cock
Robinet de vidange
Niveauanzeige
Level indication
Indication niveau
Einfüllstutzen
Filling nozzle
Tubulure de remplissage
Druckanzeige*
Pressure indication
Affichage digital de la
pression
Temperaturanzeige und Regler
Temperature indication and
controller
Affichage de température et
régulateur
Netzschalter
Mains swich
Interrupteur général
Bypass-Ventil*
Bypass-valve*
Venne bypass*
Pumpenstutzen
Pump nozzles
Tubulures de pomp
Alarmkontaktausgang
Alarm contact ouput
Contact alarme
Entleerungshahn
(geschlossen)
Drain cock (closed)
Robinet de vidange
(fermé)
*außer / except / sauf WK 500, WK 502, WKL600, WKL 603, WKL 700, WKL 703
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 10 -
WK(L) 7000 W, WK(L) 10000 W
Niveauanzeige
Level indication
Indication niveau
Einfüllstutzen
Filling nozzle
Tubulure de remplissage
Druckanzeige
Pressure indication
Affichage digital de la
pression
Temperaturanzeige und Regler
Temperature indication and
controller
Affichage de température et
régulateur
Netzschalter
Mains swich
Interrupteur général
Alarmkontaktausgang
Alarm contact ouput
Contact alarme
Bypass-Ventil
Bypass-valve
Vanne bypass
Wasser-Zulauf
Water inlet
Arrivé d’eau
Wasser-Abflauf
Water outlet
Sortie d‘eau
Pumpenstutzen
Pump nozzles
Tubulures de pomp
Entleerungshahn
(geschlossen)
Drain cock (closed)
Robinet de vidange
(fermé)
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 11 -
3. Basic construction and technical description
Common features
All Series WK water circulation coolers have a refrigeration system in the lower part of the unit, employing a
sealed compressor, air-cooled or water-cooled condenser with refrigerant R 134a resp. R 404 A to cool the
liquid in the liquid tank through an evaporator.
In case of water-cooled version the required cooling water flow is optimized in dependence of the
condensation pressure, that means the water consumption is dependent on the dissipated capacity. It is
between 200 and 2000 L/h according to device, cooling water temperature and load. The cooling water
temperature must not exceed 25°C. Cooling water pressure 2,5...10 bar is necessary.
Immersion pumps of different capacity circulate the liquid (usually water) inside the bath and pump it
outside and through the external equipment to be cooled.
The types WK 7000, WK 10000 und WKL 7000, WKL 10000 have a separate pump that charges a plate
heat exchanger. Through that the cooling capacity is independent of the discharge flow through the external
circuit.
A temperature probe inside the bath measures the temperature which is indicated digitally. The temperature
setpoint is selected digitally. The controller controls cooling by switching the refrigeration compressor on
and off (from WK 4600 through magnetic valves in push-pull circuit).
An intelligent delay logic prevents the compressor being overloaded due to excessive switching frequency.
In the configuration level an alarm switching point can be adjusted. When exceeding this value the luminous
diode K2 goes out and the neutral contact of the plug connection alarm at the back of the unit opens. This
means that the alarm contact is open even in case the unit is switched off. The contact is closed only 60 sec
after switching on the mains switch.
If the temperature of the liquid is lower than the chosen alarm switching point the contact is closed which
means that contacts 1 and 2 of the plug connection 15N are closed. Maximum contact load 30 V, 2 A.
Socket coupler Ref.No.: EQD 047
Materials in contact with the cooling liquid:
WK 230 stainless steel, perbunan
WK 500...WKL 10000 stainless steel, copper, brass, ceramics, plastics, perbunan
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 12 -
All WK-models with working temperature range 0...40°C
WK 500
Desk top unit with two-stage high-grade steel circulating pump with discharge pressure of 1 bar. Castors
at the rear for the slight handling.
WK 502
Desk top unit with increased cooling capacity and circulating pump. Especially also for the cooling of
AAS units.
WK 1200, WK 2200
Floor-mounted devices in the middle performance range, with powerful circulating pumps with max.
discharge pressure of 3,2 bar. Adjustable bypass for the pressure decrease. 4 castors, 2 can be locked.
WK 1400, WK 2400
Floor-mounted devices as WK 1200 and WK 2200, but with two-stage high-grade steel pump of low noise
with max. discharge pressure of 1 bar.
WK 3200, WK 4600, WK 7000, WK 10000
Floor-mounted devices with large cooling capacity and 3,2 bar circulating pump designed for three-phase
current.
WK 7000 W, WK 10000 W
Very powerful devices with water-cooled condenser.
All WKL models have a working temperature range expanded under 0°C and are with
temperatures around 0°C more efficient than comparable WK devices are
WKL 230
Very compact desk-top unit with working temperature range to –9.9°C.
WKL 600, WKL 700
Desk-top units to –25°C and/or –10°C with 2-stage pump or 1 bar.
WKL 603, WKL 703
Desk-top units to –20°C and/or –5°C with powerful side channel pump with max. discharge pressure of
3,2 bar.
WKL 1200, WKL 2200
Floor-standing models in the middle performance range with working temperature range to –9.9°C,
3,2 bar. Pumps and adjustable bypass for the pressure decrease.
WKL 3200, WKL 4600
Floor-standing three-phase alternating current devices with working temperature range to –9.9°C and
3,2 bar pump.
WKL 7000, WKL 10000
Very efficient devices with working temperature range to –25°C and high-powerful pump (max. 6 bar,
max. 60 L/min).
WKL 7000 W, WKL 10000 W
Very efficient devices with water-cooled condenser.
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 13 -
Pump characteristics
WKL 230 ➀WKL 603, WKL 703
➁WK 502
➂WK 500, WKL 600, WKL 700, WK 1400,
WK 2400
WK 1200, WK 2200, WK 3200, WK 4600
WK 7000 (W), WK 10000 (W),
WKL 1200, WKL 2200, WKL 3200, WKL 4600
WKL 7000 (W), WKL 10000 (W)
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 14 -
Refrigeration and tempering circuit diagram
* außer / except / sauf WK 500, WK 502, WKL 600, WKL 603, WKL 700, WKL 703
Kältekreislauf (➾Anhang)
Schema cooling circuit (➾Annex)
Schéma de réfroidissement (➾Annexion)
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LAUDA Water Circulation coolers
WK, WKL
YAWE0019/18.12.01 - 15 -
4. Safety devices and warning notes
4.1 Safety devices
All cooling circuits are equipped with an overpressure monitor which switches off the compressor if the
condensation pressure is excessive. In addition all compressors are fitted with a combined
overtemperature/overcurrent cut-out which interrupts the compressor current and switches on again after
cooling down.
All pumps are fitted with winding temperature monitors or overcurrent circuit breaker.
One or more fuses or automatic circuit breakers (depending on the type of unit) are provided to protect the
electrical equipment.
4.2 Warning notes
It is essential that you observe the following instructions:
Connect the equipment only to a socket with protective earth connection (PE)!
Check the data on the rating label against the actual supply voltage and frequency!
Any work on the unit must only be carried out by a qualified electrician and with the supply plug
disconnected (except for cleaning the condenser behind the front grille)!
During starting-up it is essential to follow the sequence according to Section 6, 7 and 8!
Class A according to EMC standard EN 61326-1: Operation only at industrial areas.
Class B according to EMC standard EN 61326-1: Operation suitable for domestic areas.
Class B* according to EMC standard EN 61326-1: Thermostat fulfills class B, when a line >100 A is
available. With unfavorable net circumstances distrubing variations in line voltage can occur.
Values for temperature variation and indicating accuracy apply under normal conditions according to
DIN 58966. High-frequency electromagnetic fields may under special conditions lead to unfavourable
values. This does not affect safety.
WARNING: The equipment must only be used as intended and described in these Operating
Instructions.
This includes operation by suitably instructed and qualified personnel.
The units are not designed for use under medical conditions according to
EN 60601-1 or IEC 601-1!
At regular intervals check the condenser for any dirt deposit and also the level in the bath (see Sections 7
and 9.1)!
ATTENTION: In case of narrowed or closed circuit pressures which can destroy connected equipment
(Glass!!) can occur.
Protect the tubes with hose clips against slipping off!
Devices with side channel pump (all except for WK 230, WK 500, WK 600, WK 700, WK 1400, WK 2400)
must never be operated with bath level under minimal level since otherwise the pump bearings are
damaged.
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5. Bath liquids and hose connections
The operating temperature ranges of the bath liquids and tubings represent general data which may be
limited by the operating temperature range of the unit etc.
5.1 Bath liquids
LAUDA
Designation Working tem-
perature
range
Chemical
Designation Visco- sity
(kin)
Viscosity
(kin) at
Temperature
Ref.No.
Quantity
Former
designation from °C to °C at 20°C mm²/s mm²/s 5 l 10 l 20 l
water +5...+90 deionised
water ➀-- --
Kryo 30 ➁G 100 ➁-30...+90 Mono-
ethylene-
glycol/water
4 50 at -25°C LZB 109 LZB 209 LZB 309
Kryo 40 TF 50 -40...+60 Aqueous
solution of
salt
2.4 8 at -20°C LZB 119 LZB 219 LZB 319
☞➀Destilled or deionised high-purity water is corrosive and should only be used with the
addition of about 0.1 g sodium carbonate per litre water. Otherwise its use may lead to
corrosion.
➁When operating for longer periods at higher temperatures the proportion of water
decreases.
The mixture approaches the properties of pure glycol and becomes flammable
(flashpoint 128 °C ). The mixture ratio should therefore be checked from time to
time against the original mixture, e.g. using a hydrometer.
For temperatures from -15 to 90 °C we recommend a lower ratio of mixture of
monoethylene glycol : water of approx. 3:1. You get this when you dilute Kryo 30 with
the same amount of decalcified water.
Example: 10 L Kryo 30 + 10 L decalcified water results in 20 L with a ratio of mixture
of 3 : 1
When selecting the bath liquid it is to be noted that at the lower limit of the working
temperature range a quality loss is to be reckoned on through the increasing viscosity.
If not required, do not use the full working temperature range therefore.
Ranges of the bath liquids and tubing are general information which can be constricted
by the operating temperature range of the devices.
DIN safety sheets can be requested if required
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5.2 Hose connections (by the metre)
Type of tubing int.diam.
mm Temp. Range °C Usable Ref.No.
Perbunan tubing,
uninsulated 9 0 to 120 all bath liquids; WKL 230, all units with M 16x1
and 11 mm connector
RKJ 011
Perbunan tubing,
uninsulated 12 0 to 120 all bath liquids all units with a max. pump
pressure of <1 bar with M 16x1
and 13 mm connector
RKJ 012
Perbunan tubing,
insulated 12 -60...120 all bath liquids; all units with a max pump
pressure
<1 bar with M16 x1 and 13 mm
connector
LZS 008
Rubber tubing, fibre
strengthened ½“ -40...80 all bath liquids; all units with M16x1 and 13 mm
connector
RKJ 031
Rubber tubing,
fibre strengthened ¾“ -40...80 all bath liquids; all units with ¾“ connector RKJ 032
Rubber tubing,
fibre strengthened 1“ -40...80 for all bath liquids; all units with 1“ connector RKJ 033
Insulation 23x10 -60...150 Insulation for RKJ 031 RKJ 009
Insulation 29x10 -60...150 Insulation for RKJ 032 RKJ 013
Insulation 36x10 -60...150 Insulation for RKJ 033 RKJ 017
Hose clamp 10...16 --- suitable for RKJ 011 EZS 012
Hose clamp 16...27 --- suitable for RKJ 012, RKJ 031,
LZS 008 EZS 032
Hose clamp 20...32 --- suitable for RKJ 032 EZS 015
Hose clamp 25...40 --- suitable for RKJ 033 EZS 016
Protect tubing with hose clamps against slipping off!
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6. Unpacking, assembly and setting up
Goods are packed carefully, largely preventing transport damage. If unexpectedly some damage is visible
on the equipment, the carrier, the postal authority or the railway has to be informed so that it can be
inspected.
Standard accessories:
1 Bath cover with filler opening
WKL 230 Ref-No. EZV 070
1 Plug for filler opening,
all units (except WKL 230) Ref-No. EZV 086
2 Nipples 13 mm dia.
WK 500, WK 502, WKL 600, WKL 603, WKL 700,
WKL 703
Ref-No. HKO 026
2 Screwed rings
WK 500, WK 502, WKL 600, WKL 603, WKL 700,
WKL 703
Ref-No. HKM 032
2 Nipples ¾“ with fitting
WK 1200...WK 10000 (W),
WKL 1200...WKL 4600
Ref-No. EOA 004
2 Nipples 1“ with fitting
WKL 7000 (W), WKL 10000 (W) Ref-No. EOA 036
2 hoses 4m each with quick-release coupling,
½“ at WK(L) 7000 W an ¾“ at WK(L) 10000 W
(only in case of water-cooled devices)
Operating Instructions
The unit should be set up with the operating panel at the front: the ventilation grille for the refrigerator (grille
in lower part) must not be obstructed. Ensure minimum distance of 0.5 m between grille and wall (see 4.2).
Water-cooled version
The condensation and motor heat is dissipated by a water-cooled countercurrent heat exchanger. Connect
the tubing. The connections for water inlet (from water tap) and water outlet (to the drain) are located on the
rear of the equipment at the lower side. Water inlet on the left and outlet to the drain on the right, if one
looks on the device from behind. The cooling water amount is adapted to the requirement in dependence of
the condenation pressure.
Lock the front castors where appropriate.
Check that the drain cock is closed.
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7. Filling and connection of external consuming devices
Fill the unit with bath liquid which is suitable for the operating temperature in accordance with Section 5.
ATTENTION: Water must not be used as heat carrier below 5°C. In case of operating temperatures
below 5°C please use Kryo 30 for example (section 5.1.)!
When filling for the first time the pressure connection should be left open to assist in purging the pump,
otherwise the pump may be permanently damaged!
Remove the plug on the filler opening at the front. The use of a funnel may be convenient for filling.
When starting up for the first time the bath should be filled as high as possible resp. up to the maximum
level indication. After the external circuit has been filled up it may be necessary to add further liquid.
Level indication with red marks to determine maximum and minimum levels..
Link the pump connections at the back of the unit to the external circuit. Only pressure-tight circuits can be
connected to the chiller.
Switch off the unit before loosening the hose connections. The hose couplings do not close automatically!
ATTENTION: In case of lock of the return pipe pressures which destroy glass equipment can occur near
devices with max. discharge pressure than 1 bar.
Observe the max. permissible pressures of the connected apparatus!!
Concerning suitable tube material please refer to Section 5
In the case of high-level external circuits, if the pump is stopped and air enters the chilling circuit there is a
possibility even in closed circuits that the external volume drains down and the storage bath overflows!
The dry running of the pump, i.e. operation below minimum liquid level can cause damage to the pump
bearings!
Always ensure maximum cross-section in the external circuit (nipples, tubing, external consuming device).
This results in a larger flow rate and therefore better temperature control.
Protect the tubes with hose clips against slipping off!
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