Nelson R290 Series User manual

Installation and Operations Manual
Models
BD-HC Style Cabinets
DIP-HC Style Cabinets
R290 Series
Indoor Freezer
C Nelson Manufacturing
265 N. Lake Winds Pkwy, Oak Harbor, OH
419-898-3305

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December 22, 2020
Safety precautions:
•This equipment contains a refrigeration system charged with R290 Propane
flammable refrigerant.
•Do not plug in the unit if you observe freight damage.
•For electrical requirements, Refrigerant Charge amount and Model Name, see the
Data Tag and labels located on the end exterior panel.
•Carefully read all labels attached to the unit prior to plugging it into an electrical outlet.
CAUTION – Risk of Fire or Explosion. Flammable Refrigerant Used. Follow Handling Instructions
Carefully in Compliance with U.S. Government Regulations. R290 Refrigerant
CAUTION – Risk of Fire or Explosion. Flammable Refrigerant Used. Consult Repair
Manual/Owner’s Guide Before Attempting To Install or Service This Product. All Safety Precautions
Must Be Followed. R290 Refrigerant
DANGER – Risk of Fire or Explosion. Flammable R290 Refrigerant Used. Do Not Use Mechanical
Devices to Defrost Refrigerator. Do Not Puncture Refrigerant Tubing. R290 Refrigerant
DANGER – Risk of Fire or Explosion. Flammable Refrigerant Used. To Be Repaired Only by
Trained Service Personnel. Do not Puncture Refrigerant Tubing. R290 Refrigerant
CAUTION –Risk of Fire or Explosion. Dispose of Properly in Accordance with Federal or Local
Regulations. Flammable Refrigerant Used. R290 Refrigerant
CAUTION –Risk of Fire or Explosion. Due to Puncture of Refrigerant Tubing; Follow Handling
Instructions Carefully. Flammable Refrigerant Used. R290 Refrigerant
NOTE:
•We strongly recommend all preventive maintenance and servicing be performed by qualified HVAC
Technicians.
•Leak check with Combustible Gas Detector before and after any Servicing.
•Unplug unit before Servicing.
•If the supply cord is damaged, it must be replaced by a special cord or assembly available from the
manufacturer, or its service agent.
•Component parts shall be replaced with OEM parts only.
•Freezer must be plugged into its own individual electric circuit, which has an amp rating that
matches the data tag on the cabinet.
•DO NOT, under any circumstances, cut or remove the ground prong from the power cord. For
personal safety, this appliance must be properly grounded. Do not plug into two prong outlets.
•DO NOT, under any circumstances, use adaptor plugs or extension cords.
•Use this freezer for its intended purpose as described in this manual.
Installation and Operating Instructions:
•NSF standards require cabinet to be installed with casters, 6” legs, or sealed to the floor with an
NSF approved silicone sealant.
•Before using the equipment, inspect for freight damage. Refuse delivery if there is any damage.

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December 22, 2020
•Remove the outer packaging CAREFULLY, (cardboard and bubble wrap or Styrofoam corners and
clear plastic). Inspect for concealed damage. Again, immediately file a claim with the freight carrier if
there is damage.
•Remove the unit carefully from crate.
•CAUTION – This unit contains R290, a flammable hydro-carbon refrigerant. While installing,
moving, or using the freezer, do not disturb the refrigerant lines, (bend, puncture, or apply heat). If
you notice anything unusual, find damage, or it is not functioning properly, remove the unit from
service, and call an HVAC technician certified to handle flammable refrigerants.
•The cabinet is intended for indoor use with a store temperature of 75 degrees (F) and 55% relative
humidity. Locate the cabinet to avoid direct sunlight, drafts from vents, air conditioning or open
doors that will affect the freezers performance.
•The cabinet must be located 3 – 6 inches away from the back wall and the louvers (front and rear)
must be clear of any obstructions to ensure proper air flow to the condensing unit.
•If installing paneling in front of freezer- Please take air flow under consideration. Trapped hot
discharge air will cause poor performance. It is important to have full opening on the paneling where
the louver exists.
oNOTE: Blocking the louvers on the customer or operator side of the cabinet will cause the
compressor to overheat and cause poor performance.
•Before your new unit is connected to a power supply, check that the incoming voltage at the outlet is
the same as the data tag on the cabinet.
•Plug in the unit, turn the toggle switch “ON”. Allow the freezer to run for at least 24 hours to ensure
that it reaches the temperature set point and ensure that the freezer has reached its operating
temperature before reloading the cabinet with product.
oNOTE: This is a pre-startup check to ensure the unit is working properly. Remember, our
factory warranty does not cover product loss!
•Freezer is equipped with a digital temperature controller. The controller is preset for the proper
freezer temperature your operation requires.
•If temperature adjustment is desired, the controller may be located behind the louver grill. Unplug
the unit before removing the louver. Increase or decrease the temperature in small increments and
allow the unit to stabilize. Repeat as needed to achieve desired temperature.
oNOTE: A Wiring Diagram is located inside the condensing unit area.
To set desired temperature, pay attention to decimal points. For example, to set controller at 5 degrees,
set to 5.0, NOT .5

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December 22, 2020
OPERATION & CARE OF THE CABINET:
CAUTION –This unit contains R290, a flammable hydro-carbon refrigerant. If the unit is not functioning
properly, remove it from service, and call an HVAC technician certified to handle flammable refrigerants.
Do not operate the freezer unless the louver grills are properly secured in place.
Simply plug the freezer into an outlet following the guidelines above. The compressor will run until the
freezer shuts off when it reaches the thermometer set point.
Your new C. Nelson mfg. low temperature cabinet represents the finest in engineering design, quality of
material and craftsmanship effort. It will give you many years of trouble-free service with a minimum of
attention.
The easy-to-clean exterior surfaces should be wiped off regularly with a lukewarm, mild detergent solution.
Do not use any solvent-type cleaners, that could attack the plastic and vinyl parts of the cabinet. Never use
abrasive cleansers or scoring pads as these will mar the surface. Never clean the lids or cabinet with
steam or extremely hot water. DO NOT WASH LIDS IN A DISHWASHER.
From a sanitation standpoint, it is important that the interior of the cabinet also be cleaned periodically.
Before cleaning the interior, the unit must be Defrosted. See Defrost instructions before proceeding. A
damp cloth using the same type of lukewarm detergent solution used for the exterior can be used on the
interior. After cleaning, wipe the interior of the cabinet dry, replace the lids and plug in the freezer. Wait
several hours to ensure that the freezer has reached its operating temperature before reloading the cabinet
with product. No oiling of the equipment is required.
DEFROSING & PREVENTIVE MAINTENANCE OF THE CABINET:
Defrosting: The freezer should be defrosted every 2-4 weeks or as needed to avoid excessive frost build-
up. Excessive frost build-up significantly degrades the freezers performance and reduces operating
efficiency.
To defrost the unit, remove the lids and the product. Unplug the unit or turn the switch to “OFF” position.
When the cabinet has warmed up, any remaining frost accumulation may be scraped off the walls
CAREFULLY with a plastic or wood scraper. Never use a sharp or pointed metal scraper since it could
damage the finish or possibly pierce the walls or refrigerant tubing.
Wipe the interior of the cabinet dry. This would be a good time to clean the interior of the cabinet per the
instructions provided in OPERATION & CARE OF THE CABINET.
After the interior of the cabinet is dry, replace the lids and plug in the unit and/or turn the temperature
control to the “ON” position. Wait several hours to ensure that freezer has reached its operating
temperature before reloading the cabinet with product.
Cleaning Condenser: The freezer’s condenser should be cleaned every 6-months by a qualified HVAC
technician. To clean the condenser, unplug the unit before removing any louvers. Once the louvers are
removed, vacuum dust and debris from the coils and louvers using a soft brush attachment. Never use a
sharp or pointed tool to clean condenser coils to avoid risk of puncturing tubing. Vacuum the condenser
tunnel. Replace the louvers. Plug in the unit and ensure that the temperature control is in the “ON” position.

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December 22, 2020
GENERAL TROUBLE SHOOTING GUIDE FOR CERTIFIED TECHNICIANS
The following guide deals with common performance issues related to the entire line of cabinets, such as
electrical problems of the unit, plugged cap tubes, moisture, etc.
Problem
Probable Cause
Remedy
Condensing unit will not start
and fan will not start
1. Power cord is disconnected or no
voltage at source1
2. Blown fuse or tripped circuit breaker1
3. Control stuck in “On” position
4. Loose wire on temperature control
1. Verify power cord is OK and check
voltage at outlet with a voltmeter.
Voltage must be +/- 10% of name plate
voltage1
2. Replace fuse or reset circuit breaker.
Check power at outlet with voltmeter. If
circuit is overloaded, reduce load or
use another circuit1
3. Replace
4. Check/tighten all connections
Compressor Unit will not start,
but fan motor starts
1. Loose wire on compressor connections
2. Low voltage1
3. Start Capacitor bad
4. Relay bad
5. Defective compressor
1. Check and tighten all compressor
connections
2. Measure voltage at compressor with a
voltmeter. Voltage must be +/- 10% of
name plate voltage1
3. Replace
4. Replace
5. Replace
Condensing Unit starts but
short cycles
1. Overload defective
2. Defective thermostat
3. Check capillary tube
4. Low voltage
5. Defect in compressor winding
6. Loose connections on control or
compressor housing
7. Low refrigerant level
1. Replace
2. Replace
3. Replace capillary tube and filter drier
4. Correct problem
5. Replace Compressor
6. Check and tighten all electrical
connections
7. Check pressure/leak and, as
necessary, charge with the proper
amount of refrigerant as shown on
name plate
2
Compressor operates
continuously, too warm
1. Low refrigerant level
2. Poor ventilation
3. Room temperature is too warm
4. Excessive frost build-up
5. Plugged condenser
6. Fan motor not running or too noisy
7. Fan blade unbalanced or loose
8. Dirty condenser
9. Weak compressor
10. Check Capillary Tube
1. Check for leaks and, as necessary,
charge with the proper amount of
refrigerant as shown on name plate2
2. Ensure 3 – 6” clearance from walls for
air flow
3. Adjust room temperature to achieve 75
degrees (F) and 55% RH
4. Defrost and clean cabinet
5. Clean Condenser
6. Replace fan motor
7. Replace
8. Clean
9. Replace
10. Replace Capillary Tube and Filter Drier
Compressor operates
continuously, too cold
1. Thermostat controller set incorrectly
2. Thermostat stuck in closed position
3. A short in the wire harness or
compressor cord
4. Thermostat improperly located
1. Follow Temperature Adjustment
guidelines
2. Check pressure and, as necessary,
charge with the proper amount of
refrigerant as shown on name plate2
3. Replace
4. Call C. Nelson
Wide temperature variations
1. Improper refrigerant level2
2. Defective Thermostat
1. Check pressure and, as necessary,
charge with the proper amount of
refrigerant as shown on name plate2
2. Replace

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December 22, 2020
3. Plugged Capillary Tube
3. Replace Capillary Tube and Filter Drier
Frosted Suction Valve
1. Too much refrigerant2
1. Adjust charge and pressure to the
proper amount of refrigerant as shown
on name plate
2
Noisy Unit
1. Fasteners loose
2. Fan Noise
1. Repair as required
2. Replace fan motor if bearings show
signs of wear or replace fan blade if
unbalanced or mounting hole is worn
Led Lights
1. Lights not On
2. Lights are dim or not lighting up
1. Check connector to Led Light strip,
Check Led Lights on/off Switch
2. Check incoming voltage at connector
end, must be 12 volts.
Check Transformer
Check the light strip
LIMITED WARRANTY
C. Nelson Manufacturing Company warrants, for a period of (12) months from original shipment from its
factory, all products manufactured to be free from inherent defects in workmanship and materials, and will
replace without charge, f.o.b. Oak Harbor, Ohio, a part or parts returned, transportation charges prepaid
(customer pays freight), which our inspection proves to be thus defective.
C. Nelson warrants for a period of (5) years from original shipment from its factory, prorated insulation
integrity, leaks in any internal tubing, and leaks or failures of cold plates installed by the factory. C. Nelson
will repair or replace, at its option, based on the depreciated value of the equipment over a 5-year period.
This warranty shall not apply to any of our products, repaired or altered outside of our factory in any way so
as, in our judgment, to affect its reliability, nor to any product which has been subject to misuse,
negligence, or accident, nor shall this warranty apply to any product installed or connected otherwise than
in accordance with instructions furnished. This warranty does not cover refrigerant expense or labor
incidental to the replacement of parts under this warranty.
This warranty does not cover consequential damages, including but not limited to loss of product, loss of
use or any other consequential damages resulting from any warranty claims against C. Nelson Mfg. Co.
The return of parts or complete product for any reason must be made with our prior consent, and the return
of such parts must be made with transportation charges prepaid.
THIS WARRANTY IS EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PRODUCT.
WARRANTY GUIDELINES AND PROCEDURES
Contact the C. Nelson Manufacturing Service Department, which can be reached at 419-898-3305, with
request for warranty coverage. The Service Department will need the model number and serial number of
the cabinet to initiate any warranty request.