Labtech H50 Series User manual

H 5 0
Water Chiller
USER’S MANUAL
All product names mentioned in this manual are registered trademarks.
LABTECH
Srl

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CONTENTS
1 REMARKS..............................................................................................................5
2 GUARANTEE .........................................................................................................7
3 RECEPTION...........................................................................................................9
4 SATETY................................................................................................................11
4.1 WARNINGS .................................................................................................................. 11
4.2 PRECAUTIONS ............................................................................................................. 11
5 GENERAL INFORMATION ..................................................................................13
5.1 THE CONTROLLER PANEL ............................................................................................ 13
5.2 FRONT VIEW ................................................................................................................ 14
5.3 REAR VIEW .................................................................................................................. 14
5.4 SPECIFICATION ............................................................................................................ 15
6 INSTALLATION ....................................................................................................17
6.1 LOCATION ................................................................................................................... 18
6.2 ELECTRICAL REQUIREMENTS ....................................................................................... 18
6.3 PLUMBING REQUIREMENTS ......................................................................................... 18
6.4 FLUIDS ........................................................................................................................ 19
7 OPERATION.........................................................................................................21
7.1 CONTROLLER .............................................................................................................. 21
7.1.1 Display the setpoint ............................................................................................ 21
7.1.2 Change the setpoint ............................................................................................ 21
7.2 START UP / SHUT DOWN ................................................................................................ 21
8 MAINTENANCE ...................................................................................................23
8.1 RESERVOIR CLEANING ................................................................................................. 23
8.2 CONDENSER CLEANING ............................................................................................... 23
9 TROUBLESHOOTING .........................................................................................24
9.1 UNIT WILL NOT START ................................................................................................. 24
9.2 UNIT WILL NOT CIRCULATE FLUID ............................................................................... 24
9.3 INADEQUATE TEMPERATURE CONTROL ....................................................................... 24
10 SERVICE ............................................................................................................25

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NOTE: Please read the manual carefully! Any incorrect action may
result in the unit damage, so it will out of its warranty.
The operator who intends to use the unit should have received training appropriate
for this purpose.

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1REMARKS
he information contained in this document may be the object of patents or
patent applications by LABTECH.
The possession of the document in force does not confer any licence rights in and
to such patents:
The following names are LABTECH trademarks throughout the world:
LABTECH
H50-350 and H50-500.
All Reproduction Rights Reserved.
Chapter
1
T

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2GUARANTEE
The new equipment and material sold by LABTECH is guaranteed against any
manufacturing defects for one year (unless otherwise stated by LABTECH) with
effect:
−From the technical acceptance of the equipment in the factory by the buyer or
his designee,
−or failing this: For destinations: from the date of factory shipment certified by
air waybill, consignment note or bill of lading.
The LABTECH company guarantee applies exclusively to defectiveness arising
from a design fault or from a concealed defect. It is strictly limited to the free
dispatching of replacement parts (except for consumable items) or to the repairing
of the equipment in our workshops within a deadline of 10 working days (shipping
delay not included).
By express agreement, the following are strictly excluded from our guarantee:
−All damages, notably for staff costs, loss of earnings, business trouble, etc.
−Any breakdown due to an incorrect use of the equipment (non-adapted mains,
fall, attempt at transformation, etc) or to a lack of maintenance by the user or
to poor storage conditions.
−Any breakdown due to the use of parts not supplied by LABTECH, on
LABTECH equipment.
−Any breakdown due to the transporting of the equipment in packaging which is
not its original packaging.
−Generally any item which appears in the "accessories" section on the price
list.
Our customers are kindly asked to apply for our consent before returning any
instrument for repair. No return of materials may be accepted whithout the prior
written consent of our Sales Management which will precise the terms of such
return.
If the above consent is given, articles shall be returned in their original packaging
on a prepaid basis to the following address:
LABTECH Srl – Via Fatebenefratelli 1/5, 24010 Sorisole (BG), Italy
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We reserve the right to reship all instruments received collect failing such consent.
Whatever method and conditions of transport are chosen for the shipment of the
equipment to be repaired under guarantee, in the original packaging, the
corresponding costs and the insurance costs will be payable by the customer.
Any damage connected to the return transport of the equipment falls within the
framework of the guarantee on the express condition that the customer has sent
his complaint within 48 hours by registered letter with acknowledgement of receipt
to the carrier. A copy of the letter should be sent to LABTECH.
For equipment with a guaranty card, this is only applicable if the card delivered with
the equipment is returned to LABTECH duly completed.
TRADE SECRET AND PROPERTY RIGHTS
This document is protected by a LABTECH copyright (c) 2001 and the copying
rights are explicitly reserved. The equipment or referenced contains trade secrets
and confidential information which are LABTECH's property. It is legally protected
by the international copyright (c) laws.
LABTECH grants a licence to use its software to the user. This may not be
disclosed, used or duplicated with the intention to save it, without LABTECH's
written permission. The beneficiary must attach a copy of this document to all
authorised partial or total reproductions.

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3RECEPTION
The material LABTECH has been conceived, made, tested and inspected while
respecting procedures bound to the norm CE certificate.
The material LABTECH is inspected carefully before its conditioning. Upon receipt
of your device, control the state of the packing and if you note an anomaly, file a
claim to the carrier with 48 hours. Consult then, and verify that all is in order.
Finally, if you note that something is missing or if the material is damaged:
DO NOT WAIT, CONTACT
LABTECH
To benefit some LABTECH services (cards of applications, LABTECH information,
technical advices...), send back now the joined guarantee questionnaire duly
completed to the following address:
LABTECH
Via Fatebenefratelli 1/5
24010 Sorisole (BG)
Italy
Tel : [phone]
Fax : [phone]
E-mail: [e-mail]
www.labtechsrl.com
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If the material is not
immediately used, it
agrees that it is stored in
an own and dry place. To
respect temperatures of
storage (0 - 50°C).

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4SAFET
4.1 WARNINGS
Make sure you read and understand all instructions and safety precautions list in
this manual before installing or operating your unit. If you have any questions
concerning the operation of your unit or the information in this manual, please
contact our Customer Service Center.
4.2 PRECAUTIONS
Never place the unit in a location where excessive heat, moisture, or corrosive
materials are present.
The unit construction provides extra protection against the risk of electrical shock
by grounding appropriate metal parts. The extra protection may not function unless
the power cord is connected to a properly grounded outlet. It is the user’s
responsibility to assure a proper ground connection is provided.
Never connect the inlet or outlet fitting to your building water supply or any water
pressure source.
Never use flammable or corrosive fluids with this unit.
Do not use automotive antifreeze. Commercial antifreeze contains silicates that
can damage the pump seals. Use of automotive antifreeze will void the
manufacturer’s warranty.
Transport the unit with care. Sudden jolts or drops can damage the refrigeration
lines.
Observe all warning labels and never remove warning labels.
Never operate damaged or leaking equipment.
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Never operate the unit without cooling fluid in the reservoir.
Always turn off the unit and disconnect the power cord from the power source
before performing any service or maintenance procedures, or before moving the
unit.
Never operate equipment with damaged power cords.
Performance of installation, operation, or maintenance procedures other than those
described in this manual may result in a hazardous situation and may void the
manufacturer’s warranty.

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5GENERAL
INFORMATION
5.1 THE CONTROLLER PANEL
The controller panel consists of the following keys:
Chapter
5
Alarm Display of High Temperature (40
℃
)
Alarm Display of Low Temperature (2
℃
)
Alarm Display of Fluid Level
Alarm Display of Stop Working
Temperature Setting
/Display Button
Arrow Key

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5.2 FRONT VIEW
The front panel consists of the following keys:
5.3 REAR VIEW
The rear panel consists of the following keys:
Reservoir Top
Controller Panel
Switch
Direction of Air Flow
Plumbing Supply
Connection. See 6.3
Plumbing Return
Connection See 6.3
Electric Socket
Electric Socket Electric Socket

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5.4 SPECIFICATION
The H50 series recirculating water chiller is designed to provide continuous supply
of cooling fluid at a constant temperature and volume. The unit consists of an air-
cooled refrigeration system, plate heat exchanger, recirculating pump, reservoir
and a microprocessor temperature controller.
The following model options are available:
Model H50-500
Temp. control range 5
℃～ 35 ℃
Temp. control mode PID
Cooling mode Compressor
cooling
Temp. stability
± 0.3 ℃
Refrigerant R134A
Refrigeration capacity 500W
Cooling capacity/W 500W@25
℃
Pump capacity 4.5L/min@10psi
Reservoir volume 1,7L
Pressure 0.1MPa
NOTE: The value of Temperature stability is tested in standard operating
mode.

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6INSTALLATION
6.1 LOCATION
The unit should be located in a clean environment where ambient temperature is
between 10 ℃ and 35 ℃ (50 ℉ to 94 ℉ ).
Never place the unit in a location where excessive heat, moisture, or corrosive
materials are present.
The unit has an air-cooled refrigeration system. Air is drawn through one side of
the unit and discharged through the other side. The unit must be positioned so the
intake and discharge are not impeded. A minimum space of 3 feet (1 meter) on all
vented sides is necessary for adequate ventilation. Inadequate ventilation will
cause a reduction in cooling capacity and, in extreme cases, compressor failure.
Excessively dusty areas should be avoided and a periodic cleaning schedule
should be instituted (see Chapter 8, Maintenance). Optional air filters are available,
contact our Customer Service Center.
The unit will retain its full rated capacity in ambient temperatures up to
approximately 25 ℃ (77 ℉ ). Reduce the cooling capacity 1% for every 0.5 ℃ (1 ℉ )
above 25 ℃ (77 ℉ ), up to a maximum ambient temperature of 35 ℃ (94 ℉ ).
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6.2 ELECTRICAL REQUIREMENTS
The unit provides extra protection against the risk of electrical shock by grounding
appropriate metal parts. The extra protection may not function unless the power
cord is connected to a properly grounded outlet. It is the user’s responsibility to
assure a proper ground connection is provided.
The following power options are available:
Model Voltage/V Frequency
/Hz Phase Circuit Capacity/A
IP Degree
H50-350 230 50 1 5 20
H50-500 230 50 1 5 20
6.3 PLUMBING REQUIREMENTS
The plumbing connections are located on the rear of the unit and labeled
and . . Remove the plastic protective plugs from both plumbing connections.
Install the barbed adapters to these connections.
Connect the (SUPPLY) fitting to the hose feeding the inlet of your
application. Connect the (RETURN) fitting to the hose from the outlet of
your application. Clamp all connections.
Never connect the fitting to your tap water supply or any water pressure source.
NOTE: On units equipped with PO pumps, ensure your plumbing is rated to
withstand 40 Psi at the highest operating temperature.
It is important to keep the distance between the unit and the instrument being
cooled as short as possible. Tubing should be straight and without bends. If
diameter reductions must be made, they should be made at the inlet and outlet of
your application, not at the chiller.
When you want to change the fitting, shut down the unit at first, then put a cup on
the ground, and disconnect the fitting on your application, let the fluids in reservoir
flow out into the cup, and disconnect the fitting on our unit. Now you may connect
your application with the unit by new fittings. Then refill the reservoir with correct
fluids.

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6.4 FLUIDS
Never use flammable or corrosive fluids with this unit. Do not use automotive
antifreeze. Commercial antifreeze contains silicates that can damage the pump
seals. Use of automotive antifreeze will void the manufacturer’s warranty.
Fluids should be pure, contain none of impurity such as grains. Otherwise, the
impurity will be prone to damage the pump. Use of unpurged fluids will void the
manufacturer’s warranty. Fluids should be exchanged once every 6 months.