UNI | User manual | Elcold manual

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UNI | User manual | Elcold manual | Manualzz

Elcold Frysere Hobro ApS

Løgstørvej 81 Hørby 9500 Hobro Denmark

Phone +45 9657 2222 Fax +45 9852 4685

Email [email protected] www.elcold.com

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.

GB

• Never touch the freezers interior or

products in the freezer when the

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

User Instructions Low Temperature Freezers Model UNI/LT 2

distance by means of spacers.

frosted when a approx. 2mm thick ice layer has formed inside the cabinet.

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.

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.

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.

9.Defrosting.

In order for the freezer to work to its maximum efficiency the cabinet should be de-

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.

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

3 User Instructions Low Temperature Freezers Model UNI/LT

front grill. The controller has a digital readout of the temperature inside the cabinet. and 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.EVCO 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 60 seconds to display the probe value again.

How to lock and unlock the keyboard

1.Press the set and down keys simultaneously for more than 2 seconds.

How to change the set point

1.Press the SET key to change the set point value.

2.The set point value will be displayed and the OUT1 icon 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 60 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 tests.

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 2 dgr:C.

The offset can be adjusted in the following way.

Unlock the keyboard.

Enter the programming mode by pressing the up and down arrow keys for 4 seconds.

Select the parameter “PA” pressing the SET key to display its value.

Use arrow up or down to change its value to

-19 and press SET button again.

Once display shows again PA, keep pressed up and arrow down keys for 4 seconds.

Now you are looking parameter list, select

CA1 (offset)

The offset can be adjusted to +/- 25 dgr .C

Press SET to store the new value.

Press up + down arrow for 4 seconds or wait

60 seconds without pressing any key. The new value will now be stored.

17. Trouble shooting.

If the appliance is not operating. Then please check:

Is the electrical plug connected to the mains (wall socket)? Has the fuse blown?

If the temperature inside the appliance is too high. Then please check:

Is the EVCO controller set to the correct temperature?

Has an excess amount of ice formed inside the appliance?

If the appliance is operating continuously.

Then please check:

Is the ambient temperature very high?

Has the appliance recently been loaded with a large amount of warm products?

User Instructions Low Temperature Freezers Model UNI/LT 4

If you have checked the above points and the appliance is still not working as expected, please contact your local dealer for further advice.

For more detailed information about programming the EVCO controllers please consult the attached manuals.

ELCOLD Standard Setting of EVCO Controller

Description Label

SET POINTS

Differential (Hysteresis)

Offset

Low Temp. Alarm

High Temp. Alarm

SP r0

CA1

A1

A5

Setting

-45°C

3

0

10°C

10°C

5 User Instructions Low Temperature Freezers Model UNI/LT

EVK 012

Thermoregulator for general purposes

18 Wiring diagram

With reference to the wiring diagrams:

• the polarity of relay K1 depends on parameter u9; according to the default setting, the relay is activated when the regulator is turned off and deactivated when the regulator is turned on

• the polarity of relay K2 depends on parameter u3; according to the default setting, the relay is activated during the normal operation and deactivated during an alarm

• the serial port (by request) is the port for the communication with the supervision system

(through a serial interface, via TTL, with MOD-

BUS communication protocol) or with the programming key; the port must not be used at the same time for the same purposes.

Additional information for electrical connection:

• do not operate on the terminal blocks with electrical or pneumatic screwers

• if the instrument has been moved from a cold location to a warm one, the humidity could condense on the inside; wait about an hour before supplying it

• test the working power supply voltage, working electrical frequency and working electrical power of the instrument; they must correspond with the local power supply

• disconnect the local power supply before servicing the instrument

• do not use the instrument as safety device

• for repairs and information on the instrument please contact Evco sales network.

19 USER INTERFACE

19.1 Turning on/off the instrument

To turn on the instrument you have to supply it; to turn it off it is enough to cut off the power supply.

19.2 Locking/unlocking the keyboard

To lock the keyboard:

• make sure no procedure is running

• press and 2 s: the display will show

“Loc” 1 s.

If the keyboard is locked, you will not be allowed to:

• modify the working setpoint with the procedure related in paragraph 4.1 (you also can modify the working setpoint through parameter SP).

These operations provoke the visualization of the label “Loc” 1 s.

To unlock the keyboard:

• press and 2 s: the display will show

“UnL” 1 s.

19.3 Silencing the buzzer

• make sure no procedure is running

• press a button (the first pressure of the button does not provoke its usual effect).

20 SETTINGS

20.1 Setting the working setpoint

• make sure the keyboard is not locked and no procedure is running

• press LED out 1 will flash

• press or in 15 s; also look at parameters r1, r2 and r3

• press or do not operate 15 s.

You also can modify the working setpoint through parameter SP.

20.2 Setting configuration parameters

To gain access the procedure:

• make sure no procedure is running

• press and 4 s: the display will show

“PA”

• press

• press to set “-19”

• press

• press and 4 s: the display will show

“SP”.

To select a parameter:

• press or

To modify a parameter:

• press

• press or

• press or do not operate 15 s.

User Instructions Low Temperature Freezers Model UNI/LT 6

To quit the procedure:

• press and 4 s or do not operate

60 s.

Switch off/on the power supply of the instrument after the modification of the parameters.

21 SIGNALS

LED MEANING

out 1 LED load if it is lit, the load will be turned on; also look at parameter u9 if it flashes:

• the modification of the working setpoint will be running

• a load protection will be running

(parameters C1 and C2)

LED defrost if it is lit, an alarm will be running

°C LED Celsius degree if it is lit, the defrost will be running

LED alarm

(parameter P2)

°F LED Fahrenheit degree if it is lit, the unit of measure of the temperatures will be Celsius degree if it is lit, the unit of measure of the temperatures will be Fahrenheit degree (parameter P2)

CODE MEANING

Loc the keyboard and/or the working setpoint are locked (parameter r3); also look at paragraph 2.5

22 ALARMS

CODE MEANING

ALARM First temperature alarm

LOW Remedies:

AL1 • check the room temperature

• look at parameters A1 and A3

Effects:

• the alarm output will be deactivated; also look at parameter u3

ALARM Second temperature alarm

HIGH Remedies:

AL2 • check the room temperature

• look at parameters A5 and A7

Effects:

• the alarm output will be deactivated; also look at parameter u3

When the cause that has provoked the alarm disappears, the instrument restores the normal operation.

23 INTERNAL DIAGNOSTICS

CODE MEANING

Pr1 Room probe error

Remedies:

• check the integrity of the probe

• check the connection instrumentprobe

• check the room temperature

Effects:

• the load activity will depend on parameters C4 and C5

• the alarm output will be deactivated; also look at parameter u3

When the cause that has provoked the alarm disappears, the instrument restores the normal operation.

7 User Instructions Low Temperature Freezers Model UNI/LT

Wiring diagrams

User Instructions Low Temperature Freezers Model UNI/LT 8

Wiring diagrams

9 User Instructions Low Temperature Freezers Model UNI/LT

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