K2 Scientific Dixell XR60CX User manual

Dixell XR60CX Operating Manual
Thank you for your purchase.
This manual contains: set-up instructions, unit specs, safety information,
controller operation and maintenance steps.
K202, K204, K210, K220
IMPORTANT:
Your unit is preprogrammed
Place your unit in the desired location. Plug the unit in and allow it to cool and become stable for a minimum
of 24 hours before logging temperature or stocking products.
Be careful when setting or changing temperatures
WARNING: Changing some controller parameters can damage your unit and/or result in a loss of product. K2
will not be held responsible for losses due to unauthorized parameter changes.
Changing advanced parameters may damage the unit or void your warranty.
Please contact K2 before attempting to change advanced parameters.
Unfamiliar with the operation of a K2 controller?
Use the video tutorials on our website resources page or call us for assistance with special parameters.
Some K2 units can be changed from Celsius to Fahrenheit. We do not recommend changing your
unit to Fahrenheit. Your controller has operational parameters that rely on data in Celsius to
maintain proper function.
3.3.2022

Dixell Operating Manual
POSITIONING
•Incorrect positioning can cause damage to the equipment and generate hazardous conditions for
personnel. The installer must therefore observe the following general regulations:
•Make sure you maintain a minimum of 2” (5 cm). clearance from the walls and 15” (40 cm) from the
ceiling. The room must be well ventilated.
•Keep well away from sources of heat. Avoid direct sunlight
•Remove packing material.
•Remove accessories from inside the unit.
•Cartoon box or Wood base removal: using a hammer, tilt the cabinet to one side and loosen the two
thread-forming screws, drag the cabinet from the back side holding the base still until the four castors
have gone out from the containing holes, slightly tilt the cabinet backward and take the base away pulling
it from the front side.
SET UP OPERATIONS
To avoid errors and accidents, perform a series of checks for possible damage sustained during transport,
installation and hook-up operations before starting up the unit.
PRELIMINARY CHECKS
•Check the condition of the power cord (no cut or chaffing). Check that the door hinges and shelf support
are stable.
•Check the door seals and shelves are not damaged (broken or scratched) and that the door closes and
seals properly.
•Make sure all copper tubing, unions are in perfect condition.
FOR OPTIMAL PERFORMANCE
•Do not block the motor compartment air vents. Do not lay objects on the top of the equipment Before
storing products wait until they are cold.
•Arrange the products on suitable shelves or in containers. Do not place products directly on the base or
against the walls, doors, or fixed guards of the unit.
•Make sure doors are kept closed.
•Keep the defrost water drain outlet clear.
•Limit the frequency and duration of opening; each time the door is opened the internal temperature will
alter.
•Load products at ambient temperature gradually to allow correct refrigeration. Perform routine
maintenance regularly.

Dixell Operating Manual
This key displays your target set point. When in
programming mode, it confirms an operation.
This key starts a manual defrost
In programming mode, this key browses
parameter codes or increases display value.
In programming mode, it browses the
parameter codes or decreases the displayed
value
CONTENTS
1. Front Panel Commands
2. Parameters
3. Alarm Signaling
4. Defrost
5. Default Setting Values
6.
How to Use the Hot Key
7. Fans
8. Temperature Logging
9. Troubleshooting
10. Routine Maintenance
1. Front Panel Commands -QUICKGUIDE
Meaning
Key Combination
To lock or unlock the keyboard
To enter in programming mode
To return to room temperature display
Basic Parameters
How to see the set point
1. Push and immediately release the SET key,
the set point will be shown.
How to change the set point
1. Push the SET key for 3s to change the set point value.
2. The value of the set point will be displayed and the
°C or °F LED starts blinking.
3. To change the set values, push the or arrows.
4. To save the new set point value push the SET key
again or wait 10s.
How to start a manual defrost
Push the DEF book for 3s and a manual defrost
will start.
Advanced Parameters
1. Enter the Programming mode by pressing the
keys for 3s (°C or °F LED starts blinking).
keys for more than 7s. The L2 label will be displayed
immediately followed from the Hy parameter.
(NOW YOU ARE IN THE PROGRAMMING MODE)
3. Select the required parameter.
4. Press the SET key to display its value
5. Use or to change its value.
6. Press SET to store the new value and move to the
following parameter.
To Exit: Press or wait 15s without pressing a key.

Dixell Operating Manual
2.Parameters - How to change a parameter value
1. Enter the programming mode by pressing keys for 3s. (°C or °F LED starts blinking)
2. Use the up and down keys to select the required parameter. Press the SET key to display its value.
3. Use or to change its value.
4. Press SET to store the new value and move to the following parameter using the up and down arrows.
To Exit: press or wait 15s without pressing a key.
Changing advanced parameters may damage the
unit void your warranty. Please contact K2 before
attempting to change advanced parameters.
Regulation
US Maximum SET POINT: Set the maximum value for set point.
ot First probe calibration: Allows to adjust possible offset of
the first probe.
P2 Evaporator probe presence: n= not present; y= the defrost
stops by temperature.
oE Second probe calibration: Allows to adjust possible offset
of the second probe.
od Outputs activation delay at start up: This function is
enabled at the initial start up of the instrument and inhibits
any output activation for the period of time set in the
parameter.
AC Anti-short cycle delay: Minimum interval between the
compressor stop and the following restart.
Cy Compressor ON time with faulty probe: Time during
which the compressor is active in case of faulty thermostat
probe. With Cy=0 compressor is always OFF.
Cn Compressor OFF time with faulty probe: Time during
which the compressor is OFF in case of faulty thermostat
probe. With Cn=0 compressor is always active.
Defrost
td Defrost type: EL= electrical heater, compressor OFF; in= hot
gas, compressor ON.
dE Defrost termination temperature: If P2=Y it sets the
temperature measured by the evaporator probe, which
causes the end of defrost.
id Interval between defrost cycles: Determines the time
interval between the beginning of two defrost cycles.
Md Maximum length for defrost: When P2=n, (not evaporator
probe: timed defrost) it sets the defrost duration, when P2 =
y (defrost end based on temperature) it sets the maximum
length for defrost.
dd Start defrost delay: This is useful when different defrost
start times are necessary to avoid overloading the plant.
dF Display during defrost: rt= real temperature; it= start
defrost temperature; SP= SET-POINT; dF= label dF.
dt Drip time: Time interval between reaching defrost
termination temperature and the restoring of the control’s
normal operation. This time allows the evaporator to
eliminate water drops that might have formed due to defrost.
dP Defrost at power –on: y= at power on defrost starts; n=
defrost doesn’t start at power-on.
CF Measurement unit: °C =Celsius; °F =Fahrenheit.
WARNING: When the measurement unit is changed
the SET point and the values of the parameters Hy, LS,
US, oE, o1, AU, AL must be checked and modified if
necessary.
rE Resolution (only for °C): dE= decimal between -9.9 and
9.9°C; in= integer
Ld Default display: P1= thermostat probe; P2= evaporator
probe. SP=Set point (only XR04CX)
dy Display delay: When the temperature increases, the display
is updated of 1 °C/1°F after this time.
Fans
FC Fans operating mode: (cn, on, cY, oY) cn= in runs with the
compressor, OFF during defrost;
on= Continuous mode, OFF during defrost; cY= runs with the
compressor, ON during defrost.
oY= Continuous mode, ON during defrost.
Fd Fans delay after defrost: (0÷99 min) Interval between end
of defrost and evaporator fans start.
FS Fans stop temperature: (-55÷50°C / -67°F ÷ 99°F) setting of
temperature, detected by evaporator probe, above which
fans are always OFF.
Alarms
AU Maximum temperature alarm: When this temperature is
reached the alarm is enabled, after the “Ad” delay time.
AL Minimum temperature alarm: When this temperature is
reached the alarm is enabled, after the “Ad” delay time.
Ad Temperature alarm delay: Time interval between the
detection of an alarm condition and alarm signaling.
dA Exclusion of temperature alarm at startup: Time interval
between the detection of the temperature alarm condition
after instrument power on and alarm signaling.
Digital Input
iP Digital input polarity: oP= activated by closing the contact;
cL= activated by opening the contact.
iF Digital input configuration: EA= external alarm: “EA”
message is displayed; bA= serious alarm “CA” message is
displayed; do= door switch function; dF= defrost activation;
Au= not used; Hc= inversion of the kind of action.
di Digital input delay: With iF=EA or bA delay between the
detection of the external alarm condition and its signaling.
With iF=do - delay to activate the door open alarm.
dC Compressor and fan status when open door: no= normal;
Fn = Fans OFF; cP =Compressor OFF; Fc = Compressor and
fans OFF.
rd regulation with door open: n = no regulation if door is
opened; Y= when di is elapsed regulation restarts even if
door open alarm is present.

Dixell Operating Manual
Code
3. Alarm Signaling
Alarm Recovery
Probe alarms “P1” and “P2” start some seconds after the fault in the related probe; they automatically
stop some seconds after the probe restarts normal operation. Check
connections before replacing the probe. Temperature alarms “HA” and “LA” automatically stop assoon as
the temperature returns to normal values. Alarms “EA” and “CA” (with iF=bL) recover as soon as the
digital input is disabled.
Access Port
This unit is equipped with a 1/2" access port hole. For any third-party temperature monitoring device may
be used within the usable space for vaccine storage.
A Probe Access Port is a small port that allows you to insert a probe for a Data Logger or Central
Monitoring System into your refrigerator or freezer. Without a Probe Access Port, probes would have to
be inserted through the door gasket which can prevent the door from sealing and cause performance
issues. After inserting the probe through the port, the opening should be sealed with a plug or port putty.
Please contact our Technical Service Department with any questions.
Max high load
Defrost Indicator (Freezers)
4. Manual Defrost (Freezers)
•Unplug freezer, open the door to let the ambient air defrost the chamber manually. This process normally
takes about 4-5 hours.
•When it’s defrosted, you will need to wipe the inside with a clean cloth, or rag to absorb the water and
clean the inside chamber. When the cleaning process is completed turn the unit back on and wait for the
freezer to pull down to set point.

Dixell Operating Manual
5. Default Setting Values Refrigerator

Dixell Operating Manual
Dixell Operating Manual
5. Default Setting Values Freezer

Dixell Operating Manual
Dixell Operating Manual
6. How to Use the Hot Key
1. Program one controller with the front keypad.
2.
When the controller is ON, insert the “Hot key” and
push
key; the “uP” message appears followed a by
flashing “Ed” .
3.
Push “SET” key and the “Ed” will stop flashing.
4. Turn OFF the instrument remove the “Hot Key,”
then turn it ON again.
NOTE: the “Er” message is displayed for failed
programming. In this case push again key if you
want to restart the upload again or remove the “Hot
key” to abort the operation.
Programming the Hot Key
1. Turn OFF the unit.
2. Insert a programmed “Hot Key” into the 5 PIN
receptacle and then turn the Controller ON.
3.
Automatically the parameter list of the “Hot Key” is
downloaded into the Controller memory, the
“do”
message is blinking followed a by flashing “Ed”.
4. After 10 seconds the instrument will restart working
with the new parameters.
5.
Remove the “Hot Key”.
7. Fans
• FC=cn Will switch ON and OFF with the compressor
and not run during defrost.
• FC=on Fans will run even if the compressor is off, and
not run during defrost.
After defrosting, there is a timed fan delay allowing for
driptime, set by means of the “Fd” parameter.
• FC=cy Fans will switch ON and OFF with the
compressor and run during defrost.
• FC=oY Fans will run continuously also during defrost.
An additional parameter “FS” provides the setting of
temperature, detected by the evaporator probe,
above which the fans are always OFF. This is used to make
sure circulation of air only if his
temperature is lower than set in “FS”.
Fans and Digital Input
When the digital input is configured as door switch iF=do,
fans and compressor status depend on the dC parameter
value:
• dC=no normal regulation
• dC=Fn fans OFF
• dC=cP compressor OFF
• dC=Fc compressor and fans OFF
When rd=y , the regulation restart with door open alarm
8. Temperature Logging
When storing vaccines, you may be required to perform a field validation test. A NIST calibrated external
data logger may be used for this purpose. A data logger with text, email or online access is an added layerof
protection for your product load in the event of a temperature excursion. K2 offers NIST calibrated data
loggers to match your unit.
Control Probe
The temperature controller senses unit cooler temperature through the control probe in the unit cooler. The
unit cooler temperature typically varies from the chamber temperature, so an offset value is used by the
control system to compensate for the difference.
The temperature controller adjusts chamber temperature around the refrigerator setpoint by activating the
compressor when the control probe registers above the setpoint based on the hysteresis value.
Calibration
Recommended calibration intervals for environmental standards used in calibrations
Standards
Initial Interval (months)
Source
Standard Thermistor
24
Accredited Lab
Data Loggers (when used for
calibrations)
24 Accredited Lab

Dixell Operating Manual
Dixell Operating Manual
9. Troubleshooting

Dixell Operating Manual
Dixell Operating Manual
10. ROUTINE MAINTENANCE
Cleaning the interior and exterior of the appliance
•This unit is designed for the laboratory product storage, so it is important to keep it clean. The equipment
is thoroughly cleaned at the factory before being shipped. Before you attempt any cleaning operation
make sure the power cord is disconnected and the freezer has reached room temperature.
•Clean interior and exterior using a clean, soft cloth dampened with water and mild detergent only. Avoid
electrical components. Do not use solvent or bleach. Dry with clean, soft cloth.
•The condenser is a heat exchanger. If it is dirty or clogged the air cannot circulate freely through the
same, it cannot discharge heat properly so reducing proportionally the performance and the efficiency of
the refrigeration system.
•FOR THOSE REASONS IT IS IMPORTANT TO KEEP CLEAN THE CONDENSER COIL, TYPICALLY EVERY 6
MONTHS.
•Always switch off the unit and disconnect power cord before cleaning, it is dangerous to do it with power
ON: fan may start suddenly at any time.
GENERAL SAFETY REGULATIONS
Do not use this product with flammable gases or flammable solvents.
Do not store flammable gases, flammable liquids, or flammable solids in these units.
Primary general safety regulations:
•Do not touch the unit with wet hands and/or feet. Do not use the equipment with bare feet.
•Do not insert screwdrivers or other pointed objects between guards or moving parts of the equipment.
•Do not pull the power cord to disconnect the equipment from the electrical mains Make sure that the
equipment is not used by unsuitably qualified persons.
•Before performing any cleaning or maintenance on the equipment disconnect it from the electrical mains
by switching off the main switch and extracting the plug.
•Never use any metallic scouring pads, brushes, abrasive cleaners, or strong alkaline solution on any
surface.
•The relocation of the unit must be performed by qualified personnel. Do not shift the refrigerator from side
to side as this may create leakage point across the cooling unit piping.
•In case of faults or malfunctions, unplug the equipment and do not attempt to repair it by yourself as doing
so may void the warranty. All service and repair operations must be performed exclusively by a
manufacture’s authorized engineer. (Authorized service technician, trained service personnel, authorized
service personnel)
Service
K2 Scientific want to make sure you are happy with your purchase. There are several ways for you to
contact us with questions or service needs. Be sure to include your four-digit order number or at
least your model number handy to speed up the process.
1: Contact us via our chat feature at www.k2sci.com
2: Email [e-mail]