Omcan RS-CN-0250 User manual

Open Refrigerated Display Case
Model RS-CN-0250
Instruction Manual
Version 2.1
1-800-465-0234
www.omcan.com
3115 Pepper Mill Court, Mississauga, ON, L5L 4X5
4450 Witmer Industrial Estates, Unit 4, Niagara Falls, NY, 14305

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Table of Contents
Section
General Information
Safety & Warranty
Technical Specications
Handling and Assembly
Operation
Maintenance
Troubleshooting
Controller Instructions
Parts Breakdowns
Electrical Schematics
Warranty Registration
Model RS-CN-0250

3
General Information
Safety & Warranty
Omcan Manufacturing And Distributing Company Inc. and Food Machinery of America, Inc. dba Omcan
are not responsible for any harm or injury caused due to any person’s improper or negligent use of
this equipment. The product shall only be operated by someone over the age of 18, of sound mind, and
not under the inuence of any drugs or alcohol, who has been trained in the correct operation of this
machine, and is wearing authorized, proper safety clothing. Any modication to the machine voids any
warranty, and may cause harm to individuals using the machine or in the vicinity of the machine while
in operation.
The product is a chilling cabinet, which combines new technologies and a modern design. It has a streamlined
design and caters to both the demands of customers and useful applications. This series is designed to display
drinks, dairy products, vegetables and fruits.
CHECK PACKAGE UPON ARRIVAL
If no external damage is evident on the package upon its arrival, open it and check that all the components are
inside. If the package has suffered rough handling, bumps or damage (visible or concealed), the carrier must
be informed within 24 hours about any damage. A detailed report on the extent of the damage caused to the
machine must be lled within three days from the delivery date shown in the shipping documents.
Cautions:
• Never block the air suction outlet to keep air circulation and refrigeration capability.
• Do not overll the unit or it may hinder its operation.
• Adjust the rack height for proper food storage.
Use and Caution:
• Cool hot food before placing it in the refrigerator.
• Only trained technicians should repair damaged power cables with special tools.
• Never touch the compressor to avoid injury.
• This appliance is not intended for use by persons (including children) with reduced physical, sensory or
mental capabilities or lack of experience and knowledge, unless they have been given supervision or
instruction concerning use of the appliance by a person responsible for their safety.
• Children should be supervised to ensure that they do not play with or around the appliance.
• The operation manual is not suitable for persons (including children) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge.
WARNING:
The packaging components (cardboard, polyethylene, and others) are classied as normal solid urban waste

4
Safety & Warranty
Technical Specications
and can therefore be disposed of without difculty.
In any case, for suitable recycling, we suggest disposing of the products separately (differentiated
waste) according to the current norms.
DO NOT DISCARD ANY PACKAGING MATERIALS IN THE ENVIRONMENT!

5
Technical Specications
Model RS-CN-0250
Refrigerant and Injection (g) R134a (600g)
Rated Input power (W) 650
Power running of electrical heating element (W) 400
Max. ambient temp. /RH <28°C / 70%
Refrigeration temperature (°C) 2 - 10
Blowing Gas XPS
Type of Climate 6
Total effective volume (L) 250
Net weight (Kg) 128
Rated voltage (V) approx. 110
Rated Frequency (Hz) 60
Overall dimension (mm) (L × W × H) 680 × 610 × 1704
Rated Current (A) 10
Lamp power (W) 1.44*4 LED
Handling and Assembly
Handle with care
Unplug the wall socket rst. Never tilt it over 45
degrees when handling.
Dry place
Always locate the refrigerator in a dry location.
Sufcient space
The distance from both sides and back of refrigerator
to wall or other substance must be no less than 10
cm. The refrigeration capability may decrease if its
surrounding space is too small to circulate air.
Well ventilated
Always locate the refrigerator in an area with good
ventilation. When using for the rst time, wait for 24
hours after handling to start.
Far from heat source
Never place the refrigerator direction under sunlight.
Never locate it near any heat source to prevent
reducing refrigeration capability.
No heavy load
Never put any heavy objects on top of the
refrigerator.
Do not make holes
Never make any holes on the refrigerator. Do not
attach any objects onto the refrigerator.
Stable Location
Unpack and place the refrigerator on at and stable
ground.
Exclusive power socket
Normally, the power supply should be 100 – 110V, 60
Hz single phase AC with exclusive single phase two
pin receptacle.
Do not share the socket
Never let the refrigerator share a socket with another
appliance. The cable may become hot and this may
cause a re.

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Operation
Before use:
Plug the refrigerator into 110V exclusive socket. Unit must have independent breaker. After the refrigerator is
running, test the air suction to conrm that it is sufciently cold. Then you may put food and drinks inside, once
unit reaches temperature.
Parameter Settings
Factory intial Setting: E1=-1, E2=8, E3=6, E4=3, E5=2, E6=0, F1=25, F2=3, F3=15, F4=0, C1=0.
Please adjust E5 setting as below according to different ambient temperature range:
Ambient Temp(°C) E5 setting Other Setting
25 - 27 2 NO change
22 - 24 3 NO change
19 - 21 4 NO change
15 - 18 5 NO change
Remark: The ambient temperature for this unit is better under 27 degree. If the ambient temperature is over 27
degree,the units can work,but the efciency of unit decline and the compressor is difcult to stop. The setting
for over 27 degrees is same as the range of 25-27 degree.
Handling and Assembly
Protect cables
Never break or damage the cables as this may cause
electrical shock.
No water ushing
Never give the refrigerator surface a ush otherwise
electrical shock may occur.
Avoid ammable and explosive objects
Never put any ammable or explosive items inside
the refrigerator such as gasoline or alcohol. Never put
any dangerous product nearby the refrigerator.
No spray
Do not spray the unit with a ammable substance
such as paint. This may result in a re.
After power break
After power break or unplugging the refrigerator,
always wait at least 5 minutes before starting the
refrigerator again.
No medicine
No medicine is allowed to be kept inside the
refrigerator.

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Maintenance
Troubleshooting
1. Cabinet cleaning: The product should be cleaned once a week with the power supply disconnected. When
cleaning, use mild rinsing water and non-corrosive detergent. Do not wash it directly under the faucet.
2. De-dust the condenser to clean. The condenser should be cleaned every three months with power supply
disconnected. To clean the condenser, remove the dust on the bottom panel for air suction and remove the
dust on the cooling fan of the condenser with wire brush or high pressure air gun.
3. Check for any leaks as well as oil stains. This will indicate that there is repair needed, to be performed by
trained personnel.
4. Frequently observe the operation of the product. In case of abnormal noise, smell or smog, cut the power
supply immediately and call for a trained technician. Do not restart the product before the problem is xed.
5. Omcan Inc. will not be responsible for any accidents that occur because of failure to follow the regular
maintenance.
Troubles Causes Solutions
Strange noise under the bottom
shelf.
Fan blade is broken. Power off and x the blade.
No refrigeration in spite of normal
operation.
Unit off. Power on.
Defrost process. Stop defrost cycle.
Refrigerant leaking. Patch the leak and rell refrigerant.
Unit failure. Call for professionals.
Weak air from curtain, and higher
cabinet temperature.
Evaporator blocked by frost. Increase defrost frequency.
Inside fan damaged. Replace the fan.
Too low set point of temperature
controller.
Adjust the set point.
Vent blocked by storage. Remove the storage.
Normal air curtain, but higher
cabinet temperature.
Insufcient refrigerant. Rell the refrigerant.
Too high set point of temperature
controllers.
Adjust the set point of the
temperature controller.
The wind curtain is disturbed by
strong air ow.
Removing the disturbing factors.
Ambient temperature or humidity
beyond standards.
Improve the conditions.
Evaporator Pan overowing. Heating pipe for evaporator pan is
damaged.
Replace the heating pipe.
Water-level controller failure. Replace the water-level controller.
Ambient temperature or humidity
beyond standards.
Improve the conditions.

8
Controller Instructions
Troubleshooting
Digital Temperature Controller
Front Panel Operation
1. Set temperature.
2. Press the “SET” button, the set temperature is displayed.
3. Press or buttons to modify and store the displayed value.
4. Press the “SET” button to exit the adjustment and display the cold-room temperature.
5. If no more buttons are pressed within 10 seconds, the cold-room temperature will be displayed.
6. Illumination: Press to light. Press again to stop.
Normal air curtain but periodical
uctuation of cabinet temperature.
Condenser contaminated. Clean the condenser.
Poor venting of the unit. Improve the venting conditions.
Heat protection of compressor
failure.
Replace the heat protection.
Capillary is blocked by ice. Replace the drying lter.
Temperature controller failure. Replace the temperature controller.
NOTE
The murmur of water is heard when the refrigerator is working. The coolant is circulating in the system. During
wet seasons, condensation might be found on the outside of the refrigerator. This is caused by high humidity.
Use a cloth to wipe it.
NOTE
The electric circuit diagram and parameters on the product name plate are nal ones. The design of
the machine may be improved without notice. If the supply cord is damaged, it must be replaced by the
manufacturer, its service agent or similarly qualied persons in order to avoid hazard.

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Controller Instructions
7. Manual start/stop defrost: press button and hold for 6 seconds to defrost or stop defrost.
8. Refrigerant LED: During refrigeration, the LED is on; When the cold room temperature is constant, the LED
is off; During the delay start, the LED ashes.
9. Defrost LED: during defrosting, the LED is on; When it stops defrosting, the LED is off. During the delay
display of defrost, the LED ashes.
• Unauthorized modications and/or repairs;
• Use of non original accessories or spare parts;
Exceptional events.
FEATURES OF FUNCTION
• This temperature controller very reliable and durable. The relay is exclusively for the use of the compressor
load which makes it safer. This way, the control of temperature easy to operate.
• There is integrated intelligent control.
THE MAIN FEATURES
• Temperature display (Celsius/Fahrenheit degrees).
• Temperature control.
• Illumination control.
• Manual, automatic defrost by turning off.
• Time or temperature setting to end defrost.
• The cold-room sensor temperature can lock during defrost.
• Parameter sets and value storing.
• Compressor restart delay.
• Parameter locking.
• The factory default resumption.
• Offset on sensor temperature.
• Self-testing.
SPECIFICATIONS
• Power supply: approx. 12V, 50/60Hz.
• Power consumption <5W.
• Range of temperature displayed: -45° - 45°C (-40° - 120°F). Accuracy ±1°C (±2°F).
• Range of set temperature: : -45° - 45°C (-40° - 120°F).
• Temperature sensor: NTC, double sensors.
• Output contact capacity for compressor: N.O. approx. 30A/250V, 50/60Hz.
• Output contact capacity for illumination: N.O. approx. 30A/250V, 50/60Hz.
• Main controller panel dimension: 78 × 35 × 76 mm.
• Mounting dimension: 71 × 29 mm.
INDICATOR

10
Controller Instructions
• Refrigerant: If the refrigerant LED is on, the compressor is working.
• Constant temperature: If the refrigerant LED is off, the compressor stops.
• Delay: If the refrigerant LED ashes, the compressor stops.
• Defrost: If the defrost LED is on, the compressor stops.
FRONT PANEL OPERATION
• Set temperature: Press “SET” button, the set temperature is displayed. Press the “UP” or “DOWN” buttons
to modify and store the displayed value, press the “SET” button to exit the menu and display the cold-room
temperature.
• Illumination: Press the “LIGHT” button, it lights. Press again, it stops.
• Manual start/stop defrost: Press “LIGHT” button and hold for six (6) seconds to defrost or stop defrost.
• Display the evaporator temperature: Press “UP” button and hold for six (6) seconds, the evaporator
temperature is displayed. After ten (10) seconds, the cold-room temperature is displayed.
PARAMETER SETUP
• Setting the parameter: The parameter can be adjusted only after correct PA is entered. If wrong, the
parameter can only be checked, but cannot be adjusted. However temperature controlling can still occur.
• Setting parameter: Press “SET” for six (6) seconds, start the parameter menu and the PA (menu password)
ashing. Enter the password by pressing “UP” or “DOWN”. Press “SET” again to choose the parameter.
Press “UP” or “DOWN” and the parameter can be displayed and adjusted. After the change, if no button is
pressed in thirty (30) seconds, the system will set new parameter and go back to normal operations.
• Changing menu password (CPA): The CPA can be checked or changed only after correct menu password
to be entered. When it shows CPA, press “UP” or “DOWN”, the present password is displayed and can be
changed to new the new password. Press “LIGHT” to conrm and apply the new password. (Make sure to
remember the new password or you can never adjust another parameter).
• Setting factory default parameters: Press “DOWN” button for one (1) second and then press “UP” button
simultaneously for six (6) seconds, the indicator ashes. All parameters will be changed to factory defaults.
After ten (10) seconds, it returns to normal operation.
FUNCTION DETAILS
Parameter Function Set Range Default
Settings
Recommended
Settings
PA Menu Password Approx. 0 – 99 00° 00°
E1 Lower Set Point Approx. -45°C Set
Temperature
Approx. -40°F
-15°C
05°F
-5°
E2 Higher Set Point Set Temperature
Approx. 45°C
Approx. 120°F
10°C
50°F
6°

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Controller Instructions
E3 Temperature Hysteresis Approx. 00 – 10°C
Approx. 1 – 36°F
05°C
07°C
4°
E4 Compressor Start Delay Approx. 00 – 10 minutes 00° 0°
E5 Offset On Room Temperature Approx. -5°C - 5°C / F 00° -1°
E6 Offset On Evaporator Temperature Approx. -5°C - 5°C / F 00° 0°
F1 Maximum Defrost Duration Approx. 1 – 60 minutes 20° 25°
F2 Defrost Interval Time Approx. 00 – 24 hours 06° 4°
F3 Defrost Termination Temperature Approx. 0 – 20°C
Approx. 32°F - 68°F
12°C
54°F
20°
F4 Display During Defrost 00 = normal display
01 = Last value before
defrost
01° 0°
C1 Temperature Unit 00 = °C
01 = °F
00° 0°
CPA Changing Menu Password Approx. 00 – 90 (Setting
“00”, the menu password is
cancelled).
00° 0°
Notes:
• The parameters can be changed only after the correct PA is entered, or else it can only be checked.
Temperature controlling can be changed without the correct PA.
• PA is set “00”, no password required for checking and/or changing.
PARAMETER DETAILS
• Temperature controlling: After turning on for the delay time (E4), the compressor starts operating when
cold-room temperature is greater than the set temperature (set temperature + hysteresis), and will be off
when cold-room temperature less than the set temperature. To protect the compressor, it can be restarted,
unless the time when the compressor stops is longer than the delay time (E4).
• Defrost by turning off: After a defrost interval, it begins automatic defrost function. Eg: When evaporator
sensor temperature is less than the defrost termination temperature (F3), the defrost LED is on and the
compressor stops. When evaporator sensor is greater than the defrost termination temperature or defrost
duration (F1) the defrost stops. After two (2) minutes of draining time, the cold-room temperature is greater
than (set temperature + hysteresis) and the compressor starts. Tt goes back to refrigeration status. When
defrost interval time (F2) is set “00”, the function of automatic defrost will be cancelled. Temperature
displayed when defrost: If F4 is set “01”, it displays the temperature when defrost starts. After defrost, it will
continue to display this temperature for twenty (20) minutes and the defrost LED ashes, then come back
to normal temperature.
• Sensory work mode: If the cold-room sensor is short circuited or overheated, “HH” is displayed. If the cold-
room sensory has an open circuit or too low temperature, “LL” is displayed. The compressor automatically
has a cycle of forty-ve (45) minutes on and fteen (15) minutes off. When the evaporator sensor fails or it
is over the displayed range, the defrost termination will be just controlled by the defrost duration.

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Controller Instructions
NOTES FOR INSTALLATION
• Before wiring, please read the instructions carefully and understand the function of every contact so that
you can make correct wire connection. Control loads cannot exceed the ratings.
• The temperature controller cannot be installed any area where there is water, dirt, moisture or high
temperatures. Please pay attention to EMC problem and prevent the temperature controller from any
potentially dangerous contact.
• The sensor cable leads must be kept away from the main supply in order to avoid a high frequency noise.
0.75 – 1.5 mm2 exible cord shall be used for wiring control load terminals.
• The evaporator sensor must be installed between the ns of the evaporator in the area, where there is the
thickest ice. Do not place the evaporator sensor near the electric heater.
• If the temperature controller stops functioning, please cut off the power supply and reset.
• Please don’t dismantle the controller. If you need to repair or if there any problems when using the
controller, contact an authorized service center.

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Parts Breakdown
Model RS-CN-0250 25825

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Parts Breakdown
Model RS-CN-0250 25825
Item
No. Description Position Item No. Description Position Item No. Description Position
30819 Front Decorative Strip 1 30843 Bottom Bracket 25 30867 Motor for Evaporator 49
28666
30820 Side Glass 2 30844 Bottom Frame of Cabinet 1 26 30868 Evaporator 50
30821 Windshield 3 30845 Bottom Frame of Cabinet 2 27 30869 Protection Grill Nets 51
30822 Bottom Shelf 4 30846 Foam under Evaporator 28 30870 Front Bafe Plate 52
30823 LED Illumination 5 30847 Tray under Evaporator 29 30871 Front Adiabatic Foam 53
30824 Price Tag Frame 6 30848 Evaporator 30 30872 Front Decorative Board 54
30825 Top Inbuilt Sheet 7 30849 Back Panel 31 30873 Back Frame 55
30826 Top Shelf 8 30850 Clip of Cabinet 32 30874 Joint Bracket 56
30827 Left & Right Frame 9 30851 Fixed Board 33 30875 LED Plug Holder 57
30828 Decorative Board 10 30852 Metal of Base 34 30876 LED Water Proof Plug 58
30829 Top Front Cover 11 30853 Compressor 35 30877 Plug Holder 59
30830 Adiabatic Foam 12 30854 Fan Motor for Condenser 36 30878 Plug 60
30831 Top Cover 13 30855 Blade of Fan Motor 37 30879 Nigh Curtain 61
30832 Air-out Board 14 30856 Motor Bracket 38 30880 Wire Protect Ring 62
30833 Crosspiece 15 30857 Plate Pinch for Dry Filter 39 30881 Transformer Holder 63
30834 Left & Right Shelf Bracket 16 30858 Dry Filter 40 30882 Electric Board Fixing 64
30835 Air Intake Grill 17 30859 Plate Pinch of Condenser 41 30883 Switch for LED Lamp 65
30836 Pole for Shelf 18 30860 Condenser 42 30884 Components of Water Box 66
30837 Back Inbuilt Sheet 19 30861 Wind Shield 43 30885 Digital Controller 67
30838 Left & Right Frame 20 30862 Front Castor 44 30886 Nut Gasket 68
30839 Back Ventilated 21 30863 Back Castor 45 30887 Decoration Nut Gasket 69
30840 Back Adiabatic Foam 22 30864 Fence of Base 46 30888 Nut Decoration 70
30841 Back Cover 23 30865 Motor Bracket 47 30889 Wire Clip 71
30842 Bottom Frame of Cabinet 24 30866 Fan Blade 48 30890 Power Cord 72

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Model RS-CN-0250 25825
Electrical Schematics

16

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Warranty Registration
Thank you for purchasing an Omcan product. To register your warranty for this product, complete the information below, tear off the card at
the perforation and then send to the address specied below. You can also register online by visiting:
OMCAN INC.
PRODUCT WARRANTY REGISTRATION
3115 Pepper Mill Court,
Mississauga, Ontario
Canada, L5L 4X5
OMCAN
PRODUCT WARRANTY REGISTRATION
1889 Maryland Avenue,
Niagara Falls, New York
USA, 14305
www.omcan.com/warrantyregistration.html
Thank you for choosing Omcan
Purchaser’s Information
Name: Company Name:
Address:
Telephone:
City: Province or State: Postal or Zip: Email Address:
Country: Type of Company:
Restaurant Bakery Deli
Dealer from which Purchased: Butcher Supermarket Caterer
Dealer City: Dealer Province or State: Institution (specify):
Invoice: Other (specify):
Model Name: Model Number: Serial Number:
Machine Description:
Date of Purchase (MM/DD/YYYY): Date of Installation (MM/DD/YYYY):

For mailing in Canada For mailing in the US
Warranty Registration
Thank you for purchasing an Omcan product. To register your warranty for this product, complete the information below, tear off the card at
the perforation and then send to the address specied below. You can also register online by visiting:
OMCAN INC.
PRODUCT WARRANTY REGISTRATION
3115 Pepper Mill Court,
Mississauga, Ontario
Canada, L5L 4X5
OMCAN
PRODUCT WARRANTY REGISTRATION
1889 Maryland Avenue,
Niagara Falls, New York
USA, 14305
www.omcan.com/warrantyregistration.html
Thank you for choosing Omcan
Purchaser’s Information
Name: Company Name:
Address:
Telephone:
City: Province or State: Postal or Zip: Email Address:
Country: Type of Company:
Restaurant Bakery Deli
Dealer from which Purchased: Butcher Supermarket Caterer
Dealer City: Dealer Province or State: Institution (specify):
Invoice: Other (specify):
Model Name: Model Number: Serial Number:
Machine Description:
Date of Purchase (MM/DD/YYYY): Date of Installation (MM/DD/YYYY):

For mailing in Canada For mailing in the US

Notes

Notes

Over the last 60 years, Omcan has grown to become a leading supplier to the food
service industry in Canada and the USA. Our success over these many years is
directly attributed to our established relationships with all of our valued customers
and through providing them with Diverse, Dependable and Proven products.
Omcan continues to help our customers remain competitive.
With associates in North America, Europe, and Asia, our global footprint continues
to expand as we hold to the principle that clients benet from the accessibility
and familiarity of our sales team. In 2013 as our geography and brand recognition
continued to grow, we changed to one name Omcan Food Machinery.
In over 200,000 sq ft of warehouse space we stock over 2,500 quality food
equipment and supplies for the food preparation market.