AccuCold EL51LT User Manual
Elcold Frysere Hobro ApS
Løgstørvej 81 Hørby 9500 Hobro Denmark
Phone +45 9657 2222 Fax +45 9852 4685
Email elcold@elcold.com www.elcold.com
i.c. graphics cph
User Instructions
Low Temperature Freezers Model UNI/LT
USER INSTRUCTIONS
Congratulations on your new low temperature
freezer. We trust that it will serve you for many years
to come. In order to gain optimum benefit from
your freezer, please read the following instructions
thoroughly and act accordingly. The low-temperature freezers are used for freezing and long-term
storing of food products, medical preparations (
vaccines, blood plasm, ect.) and other biological
products.
1. Environmental protection and disposal.
The packaging is designed to protect the
appliance and its components during
transportation, and it is made of recyclable
materials.
• Please return the packaging to an
official collection point for recycling.
• Old appliances contain reusable
materials and should not be disposed
of together with household refuse.
• Remove the spring-action hinges from
the appliance, in order to prevent
children from being entrapped in the
appliance.
• Ensure that no part of the refrigeration
tubing is damaged as the refrigerant
in the appliance risks escaping to the
environment.
• Information about refrigerant type
and amount will be found on the type
plate on the rear of the appliance
(Fig. 1).
2. Safety instructions.
• In order to prevent injuries and or
damage to the appliance, it should
be unpacked and set up by min. two
people.
• If upon unpacking the appliance is
found damaged, do not connect to
the mains, but contact the supplier.
• Interference with or repair to the
appliance should only be carried out
by authorized personnel, in order to
avoid any injuries. (contact the sup plier for further information).
• Never put naked flames or other igni tion sources inside the appliance.
• Never touch the freezers interior or
products in the freezer when the
GB
freezer is operating. Use gloves or alike
in order to avoid injuries (frost-bite).
• Keep the key to the appliance away
from the appliance and out of the
reach of children.
3. Connection to the mains.
• For safety reasons the appliance must
be earthed. If you are in any doubt,
please contact an authorized electri
cian.
• The appliance should be left for 5
hours before it is connected to the
mains. If the appliance is connected
before that, there is a risk of damaging
the compressor.
• If for any reason the appliance is
disconnected from the mains, please
wait 10 minutes before re-connecting.
The electronic starting device needs
this time to cool down, before a safe
re-start can be made.
4. Before use.
• Before use, the interior of the appli ance should be cleaned with a mild
soap solution, and wiped off with a dry
clean cloth. Never use any kind of
solvent or other chemicals.
5. Setting up the freezer.
The freezer should not be placed where it
might be splashed with water, in extreme
high humidity or in direct sunlight. Any of
these factors may lead to a reduction in
performance and shorten the life span of
the components. The freezer should be
placed on a horizontal level, and should
not be placed close to a heating appliance
or heating tubes. Allow a minimum of 50mm
(2”) clearance on the side and the back.
The side with the ventilation grill should have
a clearance of at least 100 mm (4”) in order
to allow the heat from the compressor
motor to dissipate. Underneath the appliance there should be a gap of 15 mm approx. (1⁄2”). On a soft surface, e.g. carpet,
it may be necessary to ensure the correct
distance by means of spacers.
User Instructions Low Temperature Freezers Model UNI/LT
2
6. Electrical supply.
The electrical supply should always be in
accordance with the rating plate on the
back of the freezer.
The supply must always be in accordance
with the law and regulations regarding
electrical safety, if any doubts contact your
supplier.
7. Starting Up.
In case the compressor does not start when
the freezer has been plugged in, the electrical supply may not be in order. Check if
there is an electricity supply to the plug or if
the fuse is blown. If not please go to trouble
shooting page 6. 18.
The ice layer is easily removed with a plastic
or wooden scraper. Never use a sharp metal
object which might will cause damage to
the inner liner.
The defrosting frequency is determined
mainly by two factors the usage pattern
(number of lid openings) and the relative
humidity. Excess water can be drained out
by using the drain water outlet on the front
of the freezer.
10.Cleaning.
Cleaning should be done when needed.
When used in a dirty environment it might
be necessary to remove the compressor
compartment grill, and clean the compressor compartment eventually with a vacuum
cleaner.
If the cleaning process is neglected there
is a risk that the performance of the freezer
will be effected, and even damage to the
compressor could occur due to overheating.
8.Operating the freezer
The empty freezer should be switched on
for at least 5-6 hours prior to loading of the
freezer. The freezer should not be loaded
above the inside walls which is also the load
line limit.
Please note: After the lid has been opened,
there will be a vacuum created inside the
freezer due to the low temperatures. Wait a
few minutes before trying to reopen the lid
otherwise the handle could be damaged.
Fig. 1
9.Defrosting.
In order for the freezer to work to its maximum efficiency the cabinet should be defrosted when a approx. 2mm thick ice layer
has formed inside the cabinet.
11. Storage.
If the freezer is stored for a period of time,
the lid should be kept open for free circulation of air inside the cabinet in order to
avoid corrosion of the inner liner.
12. Temperature control UNI/LT- freezers.
The temperature inside the freezer is controlled by the electronic controller in the
front grill. The controller has a digital readout
of the temperature inside the cabinet. and
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User Instructions Low Temperature Freezers Model UNI/LT
the option of changing the temperature
inside the cabinet.
13. External voltage and temperature alarm.
Optionally the freezer can be equipped with
a battery operated alarm box with connections for external alarm for voltage failure
and temperature alarm. The battery should
be exchanged every two years.
Please note! When commissioning the
freezer, the battery must be turned into its
correct position. More details on page 17.
14.Dixell controller.
15. Functions.
How to see the set point:
1.Press and immediately release the SET key,
the display will now show the set point value.
2.Press and immediately release the SET key
or wait for 5 seconds to display the probe
value again.
How to lock and unlock the keyboard
1.Press the up and down keys simultaneously
for more than 3.seconds.
How to change the set point
1.Press the SET key for more than 3.seconds
to change the set point value.
2.The set point value will be displayed and
the LED starts flashing.
3.To change the set point value, push the up
or down arrow.
4. To memorise the new setting press the SET
key again or wait 15 seconds for the controller to return to normal display of the probe
temperature.
16. Setting the controllers offset value
The UNI/LT freezer is designed for long time
and safe storage of sensitive products.
In some situations the UNI/LT freezer is also
used for other applications like in laboratories for different low temperature test.
Depending on the actual situation it might
be necessary to change the controllers offset value in order to get a correspondence
between the reading on the display and the
actual temperature inside the cabinet.
The factory setting is an offset of 0 dgr:C.
The offset can be adjusted in the following
way.
Unlock the keyboard.
Enter the programming mode by pressing
the SET and arrow down keys for 3 seconds.
Select the parameter “Ot” by pressing arrow
up or down key.
Press the SET key to display its value.
Use arrow up or down to change its value.
The offset can be adjusted to +/- 12 dgr .C
Press SET to store the new value.
Press SET + arrow up or wait 15 seconds
without pressing any key. The new value will
now be stored.
For more detailed information about
programming the Dixell controllers please
consult the attached manuals.
17. Trouble shooting.
The appliance is not operating. Please
check:
Is the electrical plug connected to the
mains (wall socket)? Has the fuse blown?
The temperature inside the appliance is too
high. Please check:
Is the Dixell controller set to the correct
temperature?
Has an excess amount of ice formed inside
the appliance?
The appliance is operating continuously.
Please check:
Is the ambient temperature very high?
Has the appliance recently been loaded
with a large amount of warm products?
If you have checked the above points and the appliance is still not working as expected, please contact
your local dealer for further advice.
User Instructions Low Temperature Freezers Model UNI/LT
4
INSTALLING AND OPERATING INSTRUCTIONS
Digital controller with off cycle
defrost
XR30C
GENERAL WARNING
Please read before using this
manual
• This manual is part of the product and
should be kept near the instrument for
easy and quick reference.
• The instrument shall not be used for
purposes different from those de
scribed hereunder. It cannot be used
as a safety device.
• Check the application limits before
proceeding.
Safety Precautions
• Check the supply voltage is correct
before connecting the instrument.
• Do not expose to water or moisture:
use the controller only within the
operating limits avoiding sudden
temperature changes with high at-
mospheric humidity to prevent forma tion of condensation
• Warning: disconnect all electrical con nections before any kind of mainte nance
• Fit the probe where it is not accessible
by the End User. The instrument must
not be opened.
• In case of failure or faulty operation
send the instrument back to the dis tributor with a detailed description of
the fault.
• Consider the maximum current which
can be applied to each relay (see
Technical Data).
• Ensure that the wires for probes, loads
and the power supply are separated
and far enough from each other,
without crossing or intertwining.
• In case of applications in industrial
environments, the use of mains filters
(our mod. FT1) in parallel with
inductive loads could be useful.
GENERAL DESCRIPTION
Model XR30C, format 32 x 74 mm, is a digital
termostat with off cycle defrost designed for
refrigeration applications at normal temperature. It provides two relay outputs, one for
the compressor, the other one can be used
for alarm signalling or as auxiliary output. The
probe input can be selected between PTC
or NTC. The instrument has a digital input, for
alarm signalling, for switching the auxiliary
output or for start a defrost cycle. The instrument is fully configurable through special
parameters that can be easily programmed
through the keyboard.
CONTROLLER LOADS
COMPRESSOR
The regulation is performed according to
the temperature measured by the thermostat probe with a positive differential from
the set point: if the temperature increases
and reaches set point plus differential the
compressor is started and then turned off
when the temperature reaches the set point
value again.
In case of fault in the thermostat probe the
start and stop of the compressor are timed
through parameters “COn” and “COF”.
DEFROST
Defrost is performed through a simple stop
of the compressor. Parameter “IdF” controls
the interval between defrost cycles, while its
length is controlled by parameter “MdF”.
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User Instructions Low Temperature Freezers Model UNI/LT
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