Lauda UC 2 User manual

OPERATION MANUAL
Ultracool chillers
UC 2, UC 4, UC 8, UC 14, UC 24, UC 50, UC 65, UC 80, UC 100
DMI-0217-12
24/11/2022
Read this manual prior to performing any task!

2
WARNINGS
This Operation Manual is to be followed by all persons working with the unit. It is imperative that this Manual is
made freely available at all times to service personnel and is kept at the point where the unit is installed.
The basic maintenance should be carried out by properly trained personnel and, if necessary, under the supervision
of a person qualified for this job.
LAUDA Ultracool S.L. personnel, or personnel authorized by LAUDA Ultracool S.L., should carry out any work in
the refrigerating or electric circuit during the warranty period. After the warranty period, the work must be carried
out by qualified personnel.
Disposal of Waste Equipment by Users in Private Household in the European Union.
This symbol on the product or on its packaging indicates that this product must not be disposed of
with your other household waste. Instead, it is your responsibility to dispose of your waste
equipment by handing it over to a designated collection point for the recycling of waste electrical
and electronic equipment. The separate collection and recycling of your waste equipment at the
time of disposal will help to conserve natural resources and ensure that it is recycled in a manner
that protects human health and the environment. For more information about where you can drop
off your waste equipment for recycling, please contact your local city office, your household waste
disposal service or the shop where you purchased the product.

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TABLE OF CONTENTS
1Introduction...............................................................................................................................................................5
1.1 General notes ..............................................................................................................................................5
1.2 Safety regulations........................................................................................................................................5
2Unpacking..................................................................................................................................................................6
2.1 Reception and Inspection...........................................................................................................................6
2.2 Transportation..............................................................................................................................................6
2.3 Site................................................................................................................................................................6
3Ultracool unit description.........................................................................................................................................8
3.1 Setup of the Ultracool unit (UC 2 and UC 4).........................................................................................8
3.2 Setup of the Ultracool unit (UC 8 to UC 65)......................................................................................10
3.3 Setup of the Ultracool unit (UC 80 and UC 100)..............................................................................12
3.4 Identification labels on the Ultracool unit ..............................................................................................14
3.5 Water Connection ...................................................................................................................................14
3.6 Electrical Connection (UC 2 and UC 4) ..............................................................................................15
3.7 Electrical Connection (UC 8 to UC 100)............................................................................................15
3.8 Additional Electrical Connections ..........................................................................................................17
4Startup....................................................................................................................................................................18
4.1 Operating Conditions ..............................................................................................................................18
4.2 Chiller startup...........................................................................................................................................20
5Chiller Controls......................................................................................................................................................22
5.1 Control and monitoring elements...........................................................................................................22
5.2 UC Controller...........................................................................................................................................23
5.3 Operation..................................................................................................................................................24
5.4 Preheating Function ................................................................................................................................28
5.5 Ethernet Configuration ...........................................................................................................................29
5.6LAUDA.LIVE Cloud service ...................................................................................................................31
6Maintenance ..........................................................................................................................................................32
6.1 Basic Maintenance...................................................................................................................................32
7Troubleshooting .....................................................................................................................................................33
7.1 Saving a log file in case of alarm ..............................................................................................................33
7.2 Alarms and Warnings list..........................................................................................................................35
8Technical Features.................................................................................................................................................39
8.1 Technical Features ...................................................................................................................................39

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8.2 Energy Efficiency Information................................................................................................................40
9Accessories and consumables...............................................................................................................................49
10 Log Book.................................................................................................................................................................52
10.1 Log Book ..............................................................................................................................................52
11 Annexes ..................................................................................................................................................................53
11.1 Water quality........................................................................................................................................53
12 EC Declaration of Conformity UC 2 and UC 4................................................................................................54
13 EC Declaration of Conformity UC 8 to UC 100 .............................................................................................55
Attention. Points of special interest to keep in mind.

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1INTRODUCTION
1.1 GENERAL NOTES
•This water chiller complies fully with CE.
•The Company does not accept responsibility if safety regulations are not met during handling, operation,
maintenance and repair, even though these may not be strictly stated in this operation manual.
•We recommend the translation of this operation manual into the native language of foreign workers.
•The usability and life cycle of the water chiller as well as avoiding premature repairs depends on proper
operation, maintenance, care and competent repair under consideration of this operation manual.
•We are constantly updating our products and are confident that they respond to the latest scientific and
technological demands. However, as manufacturers, we do not always know the end use or the total range
of our products’ applications. Therefore we cannot accept liability for our products in applications where
additional safety measures may be necessary. We highly recommend that users inform us of the intended
application in order to undertake additional safety measures, if necessary.
1.2 SAFETY REGULATIONS
The operator has to observe the national working, operating and safety regulations. Also, existing internal
factory regulations must be met.
Maintenance and repair work must only be carried out by specially trained personnel and, if necessary, under
supervision of a person qualified for this work.
•Protective or safety devices must not be removed, modified or readjusted.
•During operation of the water chiller none of the protective or safety devices must be removed, modified
or readjusted, temporarily or permanently.
•Only use correct tools for maintenance and repair work.
•Use original spare parts only.
•All maintenance and repair work must only be carried out to the machine once it has been stopped and
disconnected from the power supply. Ensure that the water chiller cannot be switched on by mistake by
unplugging it.
•Do not use flammable solvents for cleaning.
•Keep the surrounding area absolutely clean during maintenance and repair work. Keep free of dirt by
covering the parts and free openings with clean cloth, paper or adhesive tape.
•Ensure that no tools, loose parts or similar are left inside the system.
•The refrigerant circuit controls are set before shipment of the unit. They should not be re-adjusted under
any circumstances (except by an authorized service agent). This would void the warranty of the unit.

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2UNPACKING
2.1 RECEPTION AND INSPECTION
Unpack the Ultracool unit. Keep the original packaging of your unit for subsequent transportation.
Check the Ultracool unit and accessories for completeness and transport damage immediately after delivery.
In the case of any damage, external or internal, this cannot be referred to the manufacturer because all units
are checked before dispatch. If any damage is observed, this should be documented and reported to the
forwarding company. The LAUDA Ultracool S.L. warranty does not include any damages incurred during
transportation.
Accessories and consumables included as standard
Ultracool type
Designation
Quantity
Catalogue number
UC 8 to UC 100
External controller display
1
E5326071-02K
All types
Operation manual
1
- -
2.2 TRANSPORTATION
Keep the unit upright at all times. Do not tilt when shipping or moving.
The Ultracool unit must be transported by pallet jack or forklift truck.
2.3 SITE
The Ultracool unit must be installed in an atmosphere where the range of temperatures is within the indicated
margins mentioned in point 4.1. It is necessary to add ethylene glycol to the water of the circuit, as indicated
in point 4.1.
The chiller must be installed on a solid level surface that is capable of supporting a minimum of 150 kg (330
lb) for UC 2 and UC 4 models, 300 kg (660 lb) for UC 8 to UC 24 models, 650 kg (1430 lb) for UC 50
and UC 65 models and 850 kg (1875 lb) for UC 80 and UC 100 models. The floor must not have any
slope.
If the chiller has wheels, make sure to activate their brakes once the unit is in place to prevent it from
moving.
Do not place heavy objects on top of the chiller.
We recommend the installation of the Ultracool unit in a well-ventilated site and in a corrosive-free, dust-
free atmosphere.

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Models UC 2 and UC 4 have an electrical protection degree of IP32. If installed outdoors, they must be
completely protected from rain and installed in such a way that the control panel receives as few direct
sunlight as possible. For both models an option “Outdoor installation” is available that ensures an electrical
protection degree of IP54.
Models UC 8 to UC 100 have an electrical protection degree of IP54. In the case of outdoor installation, it
is recommended to protect the Ultracool unit from rain with a roof.
Leave a space of 0,5m (20”) around the chiller for UC 2 and UC 4 models, 1m (40”) for UC 8 to UC 24
models and 2m (80”) for the UC 50 to UC 100 models. This space is important to facilitate maintenance
work and cleaning, especially in front of the condenser (the heat exchanger on the back side of UC 2 and UC
4 models, the left side of UC 8 to UC 65 models and both left and right sides of UC 80 and UC 100).
If necessary, units UC 8 to UC 65 can be installed without any free space on the right and back sides. In this
case, foresee that the unit can be moved forwards to free the access panels when there are maintenance
works to be carried out.
The inlet of fresh air onto the condenser should be in the most direct way possible, avoiding any chance of air
recycling (the ceiling above should not be at less than 1m (40”) for UC 8 to UC 24 models and 2m (80”)
for the UC 50 to UC 100 models.
UC 2 and UC 4 models do not need any free space above them during operation, but at least 0,5m (20”)
should be available to have enough space to remove the top panel and access the electrical box inside. If no
space is left available on top of the unit, foresee that it can be moved forwards to free access to the top panel.
In case of installation in a small room it is imperative that the room has an appropriate ventilation system to
evacuate all the heat generated by the chiller as explained before on this same point. If the heat is not
removed the temperature in the room will quickly increase beyond the operating limits of the unit and it will
stop by high pressure alarm (see point 4.1).
The Ultracool units must always operate with the panels closed to enable the inlet of fresh air only through
the condenser. The only exception to this are models UC 2 and UC 4, which can still work even if the lateral
panels are open.

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3ULTRACOOL UNIT DESCRIPTION
3.1 SETUP OF THE ULTRACOOL UNIT (UC 2 AND UC 4)
Front of the UC 4
1. Top panel. It gives access to the electrical box.
2. Main power switch.
3. Controller.
4. Ventilation grid (on both sides, warm air exhaust).
5. Power and communications cables inlet.
6. Four wheels with locking brake.
1
2
3
4
5
6

9
Back of the UC 4
1. Process water inlet connection.
2. Process water outlet connection.
3. Drain connection (inside the unit).
4. Condenser (cool air intake).
5. Characteristics plate.
4
5
1
2
3

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3.2 SETUP OF THE ULTRACOOL UNIT (UC 8 TO UC 65)
Front of the UC 24
1. External controller display
2. Status and Warning/Alarm LEDs
3. Right panel. It gives access to the electrical box
4. Main power switch
5. Power and communications cables inlet (below the unit)
6. Four wheels with locking brake (feet on UC 50 and UC 65)
2
3
4
5
6
1

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Back of the UC 24
1. Process water inlet connection
2. Process water outlet connection
3. Drain connection
4. Motor fan (warm air exhaust)
5. Condenser (cool air intake)
6. Characteristics plate
4
6
5
1
2
3

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3.3 SETUP OF THE ULTRACOOL UNIT (UC 80 AND UC 100)
Front of the UC 100
1. External controller display
2. Status and Warning/Alarm LEDs
3. Front panel. It gives access to the electrical box
4. Main power switch
5. Condenser (cool air intake)
6. Power and communications cables inlet (below the unit)
2
3
6
1
5
4

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Back of the UC 100
1. Process water inlet connection
2. Process water outlet connection
3. Drain connection
4. Motor fan (warm air exhaust)
5. Condenser (cool air intake)
6. Characteristics plate
5
6
2
1
4
3

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3.4 IDENTIFICATION LABELS ON THE ULTRACOOL UNIT
You can find the following labels on the Ultracool unit:
Water inlet from
the installation to
the UC unit
Water outlet from
the installation to
the UC unit
Drain
Danger, risk of electric shock
3.5 WATER CONNECTION
Leave at least 1.5 meters (5 feet) of flexible pipe right after the chiller’s inlet and outlet connection. This will
allow moving the chiller for a better maintenance access without dismantling the water pipes.
The chiller should be located as close as possible to the application. Pressure drop in the pipe should not
exceed 0.7 bar. The water lines must be in pipes of at least ½”for UC 2 and UC 4 models, 1”for UC 8 to
UC 24 models, 1 ½”for UC 50 and UC 65 models and 2 ½” for UC 80 and UC 100 models.
Minimize the number of bends in the water lines. The length of hose, number of fittings, valves, etc. will also
cause an increase of the pressure drop.
Always install thermal insulation for all pipes or, at least, make sure that the pipes are opaque to the light.
When possible, install the water lines at the same level as the chiller until reaching the application The height
difference between the chiller and the application should never exceed 10m (33 feet). In the installations in
which the water level of the circuit exceeds the maximum level of the tank inside the Ultracool unit, it will be
necessary to install a check valve in the water outlet of the Ultracool unit and a solenoid valve in the water
inlet (an accessory is available including these elements).
To prevent rusting of the water pipes, we recommend plastic, rubber or stainless steel pipes and brass fittings.
Where flexible tubing is used, it should be of reinforced construction and rated for a minimum working
pressure of 6 bar g (90 psig) within -15ºC and 40ºC (5ºF and 104ºF).

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3.6 ELECTRICAL CONNECTION (UC 2 AND UC 4)
Operating voltage 230VAC +/-10%, 50Hz, 1 Ph or 230VAC +/-10%, 60Hz, 1 Ph depending on the
version (see characteristic plates of the unit). In terms of Electromagnetic emissions and immunity, this unit is
intended for installation in an industrial environment.
Make sure that the supply voltage does not exceed a maximum variation of 10% referring to nominal.
This unit integrates a frequency inverter with a leakage current that exceeds 3,5 mA. On installations where
a Residual Current Device (RCD) is used for extra protection, use only an RCD of Type B (time delayed).
The use of RCDs must always follow national and local regulations.
Ethernet cable connection, if the chiller is connected to a local network via Ethernet or to a Cloud gateway:
Introduce the Ethernet cable through the brush gland on the right side of the chiller and into the electrical
box through the rubber cable holder, then connect it to the controller:
3.7 ELECTRICAL CONNECTION (UC 8 TO UC 100)
Operating voltage 400VAC +/-10%, 50Hz, 3 Ph or 460VAC +/-10%, 60Hz, 3 Ph. In terms of
Electromagnetic emissions and immunity, this unit is intended for installation in an industrial environment.
Make sure that the supply voltage does not exceed a maximum variation of 10% referring to nominal.
This unit integrates a frequency inverter with a leakage current that exceeds 3,5 mA. On installations where
a Residual Current Device (RCD) is used for extra protection, use only an RCD of Type B (time delayed).
The use of RCDs must always follow national and local regulations.

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Introduce the main power supply cable through the cable gland located on the base of the chiller and connect
it to the incoming power terminals which are located on the left side of the X1 terminal block inside the
electrical box of the chiller:
For the electrical supply of the Ultracool unit, use an appropriate electrical line according to the data in the
characteristics plate.
Take the cable for the external controller display out of the chiller through the brush gland on the base of the
chiller and connect it to the back of the display.
Note: The external controller display has no IP protection; make sure it is installed on a location protected
from the weather, from dust and from any water splashes.
If the chiller is controlled remotely, it is also possible to remove the display after the initial configuration and
store it in a safe location, as the chiller does not need it to operate. In such a case the end connector of the
display’s cable also needs to remain protected from the elements, for example keeping it inside the electrical
box of the chiller.
Ethernet cable connection, if the chiller is connected to a local network via Ethernet or to a Cloud gateway:
Introduce the Ethernet cable through the brush gland on the base of the chiller and into the electrical box
through the rubber cable holder, then connect it to the Ethernet connector:

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3.8 ADDITIONAL ELECTRICAL CONNECTIONS
The chiller also has some special terminals prepared for the following functions (introduce the required cables
also through the brush gland on the right side or the base of the chiller depending on the model):
Terminals 23 and 24, remote On/Off operation: This chiller can be turned On and Off automatically by an
external signal. This remote On/Off signal is transmitted to these terminals by a dry contact in the application
(open contact = chiller Off, closed contact= chiller On).
Note: The chiller will not turn On unless these terminals are bridged. Once the commissioning operation is
complete, if the remote On/Off function described above is not used, connect the supplied wire bridge
between terminals 23 and 24 to be able to turn the chiller On from the display.
Terminals 57 and 61, external alarm report signal: These terminals provide a dry contact to report a general
alarm of the chiller. By default this contact closes when there is an active alarm.
A system of fuses or circuit breakers must be installed before the power inlet connection to the Ultracool
unit. The maximum size of these protections is defined in the Ultracool characteristics plate.

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4STARTUP
4.1 OPERATING CONDITIONS
Water temperature at the inlet:
Nominal:
15ºC (59ºF)
Maximum:
40ºC (104ºF) (1)
Cold water temperature at the outlet:
Nominal:
10ºC (50ºF)
Minimum:
7ºC (45ºF) (2)
Maximum:
35ºC (95ºF)
Temperature of the ambient air:
Nominal:
25ºC (77ºF)
Minimum:
-15ºC (5ºF) (3)
Maximum:
50ºC (122ºF)
Observe the permissible storage and operating temperatures. See point 8.1 for storage temperature limits.
(1) If the temperature difference between inlet and outlet is higher than 10ºC (18ºF) or if the inlet
temperature will exceed 40ºC (104ºF), the external by-pass accessory should be installed. This typically
happens with applications that use a water flow significantly lower than the chiller’s nominal flow.
The external by-pass option allows the chiller to work with close to its nominal flow even if the application is
only using part of that flow.
Please note that a flow lower than the chiller’s nominal flow can negatively affect the outlet temperature
stability.
(2) The Ultracool units can work with cold water temperatures lower than 7ºC (45ºF). To do so, add ethylene
glycol to the water and contact an authorized technical service to adjust the chiller.
(3) In order to work at temperatures lower than 0ºC (32ºF), add ethylene glycol to the water and contact an
authorized technical service to adjust the chiller.

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Only an authorized technical service can adjust the antifreeze set point. The following table shows the
ethylene glycol concentration and the antifreeze adjustment required:
Glycol concentration (4) and
antifreeze adjustment
Min Ambient Temperature
0ºC or more
Less than 0ºC until
-5ºC
Less than -5ºC until
-15ºC
Cold Water
Set Point
7ºC or more
0%
0ºC
15%
-5ºC
30%
-15ºC
Less than 7ºC
until 5ºC
15%
-5ºC
15%
-5ºC
30%
-15ºC
Less than 5ºC
until 0ºC
30%
-15ºC
30%
-15ºC
30%
-15ºC
Less than 0ºC
until -5ºC
30%
-15ºC
30%
-15ºC
30%
-15ºC
Less than -5ºC
until -10ºC
40%
-20ºC
40%
-20ºC
40%
-20ºC
Glycol concentration (4) and
antifreeze adjustment
Min Ambient Temperature
32ºF or more
Less than 32ºF until
23ºF
Less than 23ºF until
5ºF
Cold Water
Set Point
45ºF or more
0%
32ºF
15%
23ºF
30%
5ºF
Less than 45ºF
until 41ºF
15%
23ºF
15%
23ºF
30%
5ºF
Less than 41ºF
until 32ºF
30%
5ºF
30%
5ºF
30%
5ºF
Less than 32ºF
until 23ºF
30%
5ºF
30%
5ºF
30%
5ºF
Less than 23ºF
until 14ºF
40%
-4ºF
40%
-4ºF
40%
-4ºF
(4) The ethylene glycol percentage is given as % measured as weight of the total mixture. In case of any
modification in the quantity of water in the installation, the concentration of ethylene glycol should be
checked.
If more volume is required it is necessary to keep the ethylene glycol concentration
Do not use automotive antifreeze. Use lab grade ethylene glycol only! Do not use an ethylene glycol
concentration above 40%; this would damage the water pump.

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4.2 CHILLER STARTUP
Clean the application water circuit with tap water to be sure that there are no free particles. Otherwise, the
filter element can block up during the startup process.
Turn Off the Main power switch (to avoid any possibility of unexpected startup of the equipment during this
operation). Open the lateral panel, open the tank cover and fill the tank with water of the required quality
(see annex 11.1) and the suitable glycol concentration according to point 4.1 of this manual. Using the
Refrifluid B consumable is strongly recommended to maintain the water quality. Fill the tank directly until the
maximum level of the tank is reached. On UC 50 to UC 100 models, lift the level switch manually to make
sure it resets itself: when it resets you will hear its contact “click”.
While filling the tank, make sure no water splashes onto any electrical components. Keep the cover of the
electrical box closed during the filling procedure.
Prime the pump to release any air inside:
Remove the priming plug (P, see diagram below).
Keep the priming plug open until only liquid runs out the priming plug.
Replace the priming plug and tighten securely.
Do not start the Ultracool unit until the pump has been properly vented.
Open the water inlet valve completely and close the outlet water valve completely as shown on the following
picture:
Make sure that the external fuses are installed, see point 3.6.
Switch OFF the main power switch during any electrical intervention.
Connect the Remote ON/OFF control in terminals 23 and 24. If you do not use a remote control, connect
the wire-bridge supplied inside the electrical box to link terminals 23 and 24.