K2 Scientific K20345-C User manual

Low Temperature Chest Freezer Manual
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 assistancee with special parameters.
Thank you for your purchase.
This manual contains: set-up instructions, unit specs, safety information,
controller operation and maintenance steps.
K20345-C, K20745-C, K21145-C
8.25.2021

Chest Freezers Operating Manual
CONTENTS
1. Installation and Start-up
2. Electrical Connection
3. Operation and Function
4. Defrosting
5. Cleaning and Maintence
1 Installation and Start-up 2 Electrical Connection
3 Operation and Function
6.Fault Finding
7. Spare Parts
8. Safeguarding on the Environment
9. Technical Parameter/Accessories/
Circuit Diagram
Placement
• For safe and operational reasons, the freezer must not
be installed outdoors.
• The freezer should be placed on a stable, level surface
in a dry, well-ventilated room (max. 75% relative air
humdity).
• Never place the freezer close to heat sources such
as cookers or radiators, and avoid placing it in direct
sunlight.
• Standard EN378 species that the room in which you
install your freezer must have a volume of 1m³ per 8 g
of hydrocarbon refrigerant used in the products, so as to
avoid the formation of inammable gas/air mixtures in
the room where the freezer is located in the event of a
leakage in the refrigeration circuit.
Room Temperature
• The freezer is designed to operate at limited ambient
temperatures according to the climatic category
specied below.
Climate Class Optimum Room
Temperature
• N : +16 °C to +32 °C
Ventilation
• It is important that the freezer is installed at a
ventilated place and fresh air can circulate inhindered
above, below and around it. The freezer requires at least
20cm free space all around it.
• Data regarding voltage, power and current are given
on the nameplate which is at the back of the freezer.
•Electrical connection must be made in accordance with
the local regulations.
WARNING!
•This Freezer must be earthed.
•If the socket and the plug are not the same type,
please have the plug or socket replaced by a qualied
electrician.
•Do under no circumstances use extension lead or
adaptor.
•If the power cord is damaged, it must be replaced
by the manufactire, or service provider, or a qualied
electrician in order to avoid a hazard.
This freezer is equipped with the electronic controller.
For operation of the electronic controller, a seperate
instruction manual is enclosed and packed as accessory
in the freezer.

4 Defrosting 5 Cleaning and Maintenance
Items stored in the freezer and humidity of the surrounding
air might gradually form frost and ice inside the freezer.
A thin layer of the frost or ice will not affect the freezer
performance, but if the frost and ice are getting more
and more, the energy consumption will get higher. Small
amount of loose frost or ice can be removed by a plastic
shovel.
Never use electrical or sharp tools as these
damage the inside chamber or shelves of
the freezer.
When the frost or ice is accumulated too much,
the freezer should be completely defrosted. It is
recommended that defrosting is carried out after all
stored items are moved out of the freezer.
Defrosting process as follows:
1. Power off the freezer, and leave all the freezer doors
open to let the ice melt
2. Use a soft dry cloth to wipe off the water inside of the
freezer
3. Ensure the freezer inside clean and dry before powering
on again.
4. Move items back to the freezer when the set
temperature has been reached.
Chest Freezers Operating Manual
Cleaning
• Before cleaning, cut off the power supply and remove all
the stored items out of the freezer.
• The freezer is best cleaned by a clean, soft, and dry cloth
using mild water, if needed, neutral detergent can be
used to clean the freezer. After cleaning, make sure the
freezer get dried before powering on again. Please be
careful to prevent water entering the control panel.
• The sealing gaskets are recommended to clean regularly
to prevent degradation and extend its life span. The
sealing gaskets shall be cleaned by soft cloth with clean
water.
• If possible, it is also recommended that the tubular
condenser in the refrigeration cabin to be cleaned in a
regular basis to prevent too much dust and dirt affecting
the refrigeration performance.
• The ventilation grill also needs to be away from dust and
dirt, and it is recommended to be cleaned with a vacuum
cleaner in a regular basis.
• If the freezer is not used for a long time, please switch
off, and clean the unit before storage.
Energy Saving
• Keep the inner doors closed as always.
• Make sure the inner doors and outer door closed
properly after opening the freezer.
• Position the freezer in a cooler (min. 5 °C), well-ventilated
room.
• Defrost the freezer at a regular time to prevent ice
accumulating too much.

6 Fault Finding
Chest Freezers Operating Manual
Fault Possible Causes Remedy
No control lamps are lit. • The freezer is switched off.
• Power failure; the fuse is burned; the
freezer is not plugged correctly.
• Check the plug and socket.
• Check the power is connected
correctly.
• Reset the fuse.
Temperatures in freezer too
high.
• The vertilation grill is blocked by
dust and dirt.
• The inner doors and outer door are
not closed properly.
• Too much items are placed into the
freezer at a time.
• Too much frost and ice.
• The thermostat
• Clean the grill to ensure unhindered
air circulation.
• Close the inner doors and outer
door properly and wait for a few
hours.
• Wait a few hours to see if the
temperature can reach the set point.
• Defrost the freezer.
• Set the thermostat.
Temperature in freezer too low. •The thermostat is set as a low point.
• The inner doors are prevented from
closing tightly by items stored in the
freezer.
• Set the thermostat to a higher point.
• Reposition items inside the freezer
and make sure the inner doors are
closed tightly.
The doors cannot be open. • Vacuum pressure in the freezer. • Wait 2-3 minutes until the vacuum
pressure has been equalized and try
again.
Vibration and unusal noise. • The freezer is not placed on a stable
and level surface.
• The freezer is placed too close to
other equipments.
• Fan is not run in a proper way.
• Position the freezer on a at, level,
and stable surface.
• Move other equipments away from
the freezer.
• Open the cabin and check if the fan
is lack of lubricating oil.

7 Spare Parts
When ordering spare parts, please clarify the type
and serial number of your freezer (see g. 1 and
g. 2). This information is given on the nameplate
at the back of the unit.
NOTE: Always select qualied service technicians
when your freezer needs to be repaired or
replaced.
Important!
Please note that unauthorized changes on the
conguration of the freezer or changes to the
components of the freezer will invalidate the
warranty and product liability. Please DO NOT
dissemable the refrigeration system randomly
unless authorized by the manufacturer or carried
out by a qualied service provider.
8 Safeguarding on the
Environment
Chest Freezers Operating Manual
Packing Product
The packing material is entirely recyclable, and marked
with recycling symbol. Please follow local regulations for
scrapping.
Product
The freezer is made of recyclable material, while the
refrigeration system is charged by ammable gases.
Disposal of the entire freezer should be in according with
the local environmental regulations and relative standards.
Make sure the product is disposed by a qualied authority
for recycling both freezer bodies and refrigerants.
Disposal
• Disposal of the freezer must comply with the local
environmental regulations. Please contact your local
authorities who shall guide you how to dispost or scrap it.
• This product is marked in accordance with EU Directive
2002/96/EC on waste electical and electronic equipment
(WEEE).
• Ensuring the product is disposed in a correct way helps
prevent potential negative impacts on the environment
and human health.
• The symbol on the product or its accompanying
documents means the product must not be disposed
together with household refuse. Instead, it must be
disposed a a proper recycling station.
• The product must be disposed in accordance with the
current environmental regulations of the disposal of waste.
• For further information on the handling, recycling and
reuse of this product, please contact your local authorities,
qualied service providers, or the dealer from whom you
bought the product.

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 [email protected]
3: Call 800-218-7613
9 Technical Parameters/Acessories/Circuit Diagram
Model DW-40W100 DW-40W200 DW-40W300 DW-40W400 DW-40W500
Inner Temp (° C) -10~-40 -10~-40 -10~-40 -10~-40 -10~-40
Anti-electric Shock I I I I I
Capacity (L) 200 200 300 400 500
Rated Power (V) 115 115 115 115 115
Rated Frequency
(Hz)
60 60 60 60 60
Input Power (W) 150 350 400 400 400
Refrigerant R404a/105g R404a/200g R404a/210g R404a/245g R404a/275g
Items Operation
Manual
Temperature
Controller
Specication
Defrost Shovel Key Basket
Qty 11121