READ AND SAVE THESE INSTRUCTIONS
OASIS®
USER MANUAL
P/N 20-24002
SELF-SERVICE REFRIGERATED MERCHANDISERS
Important! See Counter Installation Guide Section In This Manual Before  Proceeding WithInstallation!

Structural Concepts Corporation ∙ 888 E. Porter Road ∙ Muskegon, MI 49441 Phone: 231.798.8888 Fax: 231.798.4960 ∙ www.structuralconcepts.com
USER MANUALS\20-24002_OASIS_COXXR_FS_RG_RM_UC_SELF-SVC_REF_CASE_USER MANUAL
REV Y DATE: 10/17/2022

**Models Represented In This Operating Manual***
CO33R CO43R CO53R CO63R CO3324R, CO4324R, CO5324R and CO6324R (24″ DEEP VERSION OF CO33R, CO43R, CO53R and CO63R) / CO43R-FS (FREE-STANDING WITH OPTIONAL FLIP-DOWN REAR DOOR) / CO33RM CO43RM CO53RM CO63RM (UNDER COUNTER MILK CRATE UNITS / REFRIGERATED MILK DISPLAYS); AKA CO33RM-UC CO43RM-UC CO63RM-UC. ALSO, CO3434RG.5716 CO3034RG.5718 CO3034RG.5718A CO3436RG.5716 CO4836R.5716 CO4836RG.5716 / CO4324R.7391.

• This Manual May Also Be Applicable To Models Not Listed Herein.

OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS –

PAGE 1 of 2

OVERVIEW

• These Structural Concepts merchandisers are designed to merchandise packaged products at 41 °F (5 °C) or less product temperatures.
• Product must be pre-chilled to 41 °F (5 °C) or less prior to being placed in merchandiser.
• Cases should be installed and operated according to this operating manual’s instructions to ensure proper performance. Improper use will void warranty.

TYPE I vs. TYPE II ENVIRONMENTAL CONDITIONS
This unit is designed for the display of products in ambient store conditions where temperature and humidity are maintained within a specific range.

• Type I display refrigerators are intended for use in an area where environmental conditions are controlled and maintained so that the ambient temperature does not exceed 75 °F (24 °C) and 55% maximum humidity.
• Type II display refrigerators are intended for use in an area where environmental conditions are controlled and maintained so that the ambient temperature does not exceed 80 °F (27 °C) and 60% maximum humidity.
• If unsure if your unit is Type I or II, see tag next to serial label.

COMPLIANCE

• Performance issues when in violation of applicable NEC, federal, state and local electrical and plumbing codes are not covered by warranty. See below.

WARNINGS

• This sheet contains important warnings to prevent injury or death. Please read carefully!

PRECAUTIONS, CORD/PLUG MAINTENANCE & WIRING DIAGRAM INFORMATION

• See next page for PRECAUTIONS, CORD/PLUG MAINTENANCE and WIRING DIAGRAM information.

COMPLIANCE
This equipment MUST be installed in compliance with all applicable NEC, federal, state and local electrical and plumbing codes.

WARNING
Risk of electric shock. Disconnect power before servicing unit.
CAUTION! More than one source of electrical supply is employed with units that have separate circuits.
Disconnect ALL ELECTRICAL SOURCES before servicing.

WARNING
Hazardous moving parts. Do not operate unit with covers removed.
Fan blades may be exposed when deck panel is removed.
Disconnect power before removing deck panel.

CAUTION! IF YOUR UNIT IS SELF-CONTAINED, YOU MUST CHECK CONDENSATE PAN POSITION & PLUG!
Water on flooring can cause extensive damage!
Before powering up unit, check and confirm that:

• Condensate pan is DIRECTLY UNDER condensate drain.
• Condensate pan plug is securely plugged into receptacle.
• Overflow pan has plug connected to its box. Units with optional Clean Sweep® MUST HAVE two plugs connected.

WARNING: This product can expose you to chemicals, including Urethane (Ethyl Carbamate), which are known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.

OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS

PRECAUTIONS

• Following are important precautions to prevent damage to unit or merchandise.
• Please read carefully!
• See previous page for specifics on OVERVIEW, TYPE, COMPLIANCE and WARNINGS.

WIRING DIAGRAM

• Each case has its own wiring diagram folded and in its own packet.
• Placement on case varies (near ballast box, field wiring box, raceway cover, or other related location).

REFRIGERANT DISCLOSURE STATEMENT

• This equipment is prohibited from use in California with any refrigerants on the “List of Prohibited Substances” for that specific end-use, in accordance with California Code of Regulations, title 17, section 95374.
• This disclosure statement has been reviewed and approved by Structural Concepts and Structural Concepts attests, under penalty of perjury, that these statements are true and accurate.

CAUTION! LAMP REPLACEMENT GUIDELINES
If LED lamps are used, they must be size, shape and overall design. Any replacements must meet factory specifications.

CAUTION! GFCI BREAKER USE REQUIREMENT
If N.E.C. (National Electric Code) or your local code requires GFCI (Ground Fault Circuit Interrupter) protection, you MUST use a GFCI breaker in lieu of a GFCI receptacle.

CAUTION! POWER CORD AND PLUG MAINTENANCE
Risk of electric shock. If cord or plug becomes damaged, replace only with cord and plug of same type.

CAUTION! ADVERSE CONDITIONS / SPACING ISSUES

• Performance issues caused by adverse conditions are NOT warranted.
• To prevent damage to end panels due to condensation, apply industrial grade silicone sealant and tightly join to opposite end panels. When not adjoining cases, keep end panels at least 6” away from walls/structures. Rear panels must also be kept at least 6” from walls and structures.
• Case must not be exposed to direct sunlight or any heat source.
• To maintain proper case temperature, keep case at least 15-feet from exterior doors, overhead HVAC vents or any air curtain disruption.
• Self-contained case clearance: 6” min. air intake / 6” min. air discharge.

CAUTION! DO NOT RELY ON THERMOMETERS OR THERMOSTATS FOR PRODUCT (FOOD) TEMPERATURES.

• Thermometers & thermostats reflect air temperatures ONLY.
• For ACTUAL product (food) temperatures, use a calibrated food probe thermometers ONLY.
• For accurate readings, DO NOT use infrared food thermometers.

SHIPPING BRACKET REMOVAL / TOE-KICK REMOVAL / REMOVAL FROM SKID / CASE

ALIGNMENT

1. Removing Shipping Brackets Attached To Skid
   • Remove screws holding case shipping brackets to skid.
   • Remove case shipping brackets from skid.
   • See illustrations at right. Note: Shipping brackets will vary in size, shape, material and location depending upon case type and model.

2. Remove Front / Rear Toe-Kicks Before Removing From Skid
   • Toe-kicks are normally shipped separately.
   • If toe-kicks are attached to case, they must be removed.
   • Toe-kicks may be attached to case via slot /magnet method.
   • Remove toe-kick by pulling away from lower magnet and lifting up and off hooks.
   • No screw removal is required.
   • See illustrations at mid-right.

3. Remove Case From Skid
   • Important! If case is shipped with levelers, they willbe in the DOWN position (for stability). To prevent damage to the case, all levelers must be raised ALL THE WAY UP before moving unit off skid and into position.
   • To prevent damage, support case while sliding it toward edge of skid).
   • IF NO CASTERS ARE ON SKID, tip case slightly back and slide skid from underside of case. When case is at edge of skid, carefully lower to floor (so two levelers rest on floor).
   • IF CASTERS ARE ON CASE, it may be rolled off skid via ramp (as shown in lower-right illustration).
   • Carefully slide skid out from under case.
   • After removal of case from skid, place into position.
   • Note: Illustration below-right may not reflect your particular model or options).
   

4. Position/Align Case Alongside Other Cases
   • If lineup requires it, be sure to position/align your case alongside adjoining cases before adjusting levelers or shimming frame support rails.
   • This may require the repositioning of the case you are installing or the already positioned cases.

CASE ADJOINMENT: URETHANE AND SILICONE APPLICATION / BOLTING ADJOINED

UNITS

Case Adjoinment

Warranty is void if improper urethane/sealant is used in this process.
Lay generous beads of caulk/sealant as specified.
A. Prior To Adjoinment – Apply Industrial Grade Urethane Adhesive (As Shown In Below Illustration)

• Lay a generous bead of industrial grade urethane adhesive in non-visible areas (as illustrated below).
• This urethane adhesive prevents refrigerated air from escaping between cases (causing condensation and reducing refrigeration efficiency) as well as preventing insects from entering the case.
• See industrial grade urethane adhesive illustration below-left.

B. Adjoining Cases – Using Bolts and Nuts

• Use appropriately sized nuts and bolts for each hole.

  1 – Hole is accessible at underside of top surface support.

  2 – Holes are accessible through rear plenum and behind honeycomb air

  diffuser.

  3 – Holes are accessible at underside of decking.

  Decking must be removed to attach bolts/nuts.

  4 – Holes are accessible at base frame (through front of case after front

  toe-kicks have been removed).

• Tighten nuts securely (but do not over-tighten).

• See accompanying illustration below. 

C. After Adjoinment – Apply Food Grade Silicone Sealant To Inner And Outer Seams

• After all nuts/bolts are securely attached to case, apply a generous bead of food grade silicone sealant at both inner and outer adjoinment seams.
• When properly applied, this food grade silicone sealant will prevent water from seeping between cases (into the case or to the floor) as well as crumbs or other residue from entering between case seams.
• See silicone sealant illustration below-left.

  You must reattach toe-kick and decking after case adjoinment process is complete.

SHIMMING FRAME SUPPORT RAILS / ADJUSTING LEVELERS

1. Cases With Frame Support Rails: Shim
   • Illustration at top-left shows case with frame support rails.
   • Shims will be provided on cases with frame support rails.
   • Use shims to level case.

2. Cases With Levelers: Adjust
   • Important! For cases with casters, after case is in proper position, levelers must then be LOWERED to floor.
   • Adjust case so it is level and plumb.
   • You may need to remove front and/or rear toe-kick to access levelers.
   • Use adjustable wrench (and possibly a pry bar) to adjust leveler.
   • Do not use pry bar on toe-kick (it may buckle).
   • Do not use pry bar on end panel (it may chip).
   • Use pry bar ONLY on base frame to avoid damaging case.
   • Use a block to reach base frames with pry bar.
   • See below-right illustrations.

COUNTER INSTALLATION INFORMATION – FOR MODELS CO33R, CO43R, CO53R & CO63R

THE FOLLOWING COUNTER INSTALLATION INFORMATION IS ONLY APPLICABLE TO MODELS CO33R, CO43R, CO53R and CO63R “UNDER-COUNTER” UNITS
———————-
NOTE: ANY REVISIONS TO THIS INFORMATION MUST ALSO MADE TO SCC P/N 20-50848

CASE FRONT AND REAR DIMENSIONAL FEATURES

NOTE: THE FOLLOWING COUNTER INSTALLATION INFORMATION PERTAINS ONLY TO MODELS CO33R, CO43R, CO53R and CO63R “UNDER-COUNTER” UNITS

• Note: A 6-foot power cord is supplied and exits the display through the lower rear panel (as shown immediately above).
  Refer to your particular model’s specification sheet for electrical requirements and plug configuration.

SIDE SECTION DIMENSIONAL AND LAYOUT FEATURES

NOTE: THE FOLLOWING COUNTER INSTALLATION INFORMATION PERTAINS ONLY TO MODELS CO33R, CO43R, CO53R and CO63R “UNDER-COUNTER” UNITS

CASE TOP AND UNDERSIDE DIMENSIONAL AND LAYOUT FEATURES

NOTE: THE FOLLOWING COUNTER INSTALLATION INFORMATION PERTAINS ONLY TO MODELS CO33R, CO43R, CO53R and CO63R “UNDER-COUNTER” UNITS

COUNTER INSTALLATION INFORMATION – FOR MODELS CO3324R, CO4324R, CO5324R &

CO6324R

THE FOLLOWING COUNTER INSTALLATION INFORMATION IS ONLY APPLICABLE TO MODELS CO3324R, CO4324R, CO5324R and CO6324R
————————-
NOTE: ANY REVISIONS TO THIS INFORMATION MUST ALSO MADE TO SCC P/N 20-50862

CASE FRONT AND REAR DIMENSIONAL FEATURES

NOTE: THE FOLLOWING COUNTER INSTALLATION INFORMATION PERTAINS ONLY TO MODELS CO3324R, CO4324R, CO5324R and CO6324R

• Note: A 6-foot power cord is supplied and exits the display through the lower rear panel (as shown immediately above). Refer to your particular model’s specification sheet for electrical requirements and plug configuration.

SIDE SECTION DIMENSIONAL AND LAYOUT FEATURES

NOTE: THE FOLLOWING COUNTER INSTALLATION INFORMATION PERTAINS ONLY TO MODELS CO3324R, CO4324R, CO5324R and CO6324R

CASE TOP AND UNDERSIDE DIMENSIONAL AND LAYOUT FEATURES

NOTE: THE FOLLOWING COUNTER INSTALLATION INFORMATION PERTAINS ONLY TO MODELS CO3324R, CO4324R, CO5324R and CO6324R

START-UP AND OPERATION: THERMOSTAT / MAIN POWER SWITCH / LIGHTS SWITCH /

FILTER

1. Merchandiser Start-Up

• Do not use an extension cord with this appliance.
• Do not operate this equipment with a damaged cord, plug or outlet.
• Insure that the main power switch is off.
• Plug cord into a certified 110V electrical outlet with ground.
• Turn main power switch on (see location at rear of case in illustration below)
• Coil fans should turn on.
• From inside of the case, check for discharge air from front baffle, to confirm that the fans are functioning properly.
• When the case is in a start-up mode or has been idle for a long period of time, unit may require 75 minutes running time to pull-down temperature.
• Turn lights on.
• Light switch is next to main power switch.
• The lights should come on at the same time.
• Always maintain front and rear airflow clearance of twelve inches.
• Obstruction or restriction of air can void warranty.
• Thermometer is also at case rear (as shown below), and controls internal case temperature.
• Interior case temperature is to be 35 °F to 41 °F.
• Note: Case temperature is determined by case size. Temperature is controlled by a thermostat. If a temperature setting change is required, refer to instructions in CAREL® CONTROLLER sections of this manual.

2. Removable, Condenser Coil Filter

• A removable filter prevents impurities (dust, dirt and debris) from entering condenser coil.
• Filter must be removed weekly and cleaned.
• See GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL) – EXTERIOR in this operating manual for cleaning instructions.

PRODUCT PLACEMENT / HONEYCOMB AIRFLOW CONSIDERATION / LOAD LINES

1. Product Placement

• Product can be placed on decking or steps (risers) within self-service display area.
• A wide range of product may be displayed.

2. Honeycomb Airflow Consideration

• Airflow from honeycomb air diffuser is designed to flow over (and around) product to return air grille at case front.
• Caution! You must keep the honeycomb air diffuser unblocked by product for airflow to reach return air grille.
• Caution! You must ALSO keep product OFF return air grill at case front.
• See illustration below.

3. Load Lines

• Load lines represent the maximum height that product can be place and/ or stacked in case.
• Keep product at or under load lines to assure that refrigerated airflow is properly cycled from honeycomb air diffuser through the return air grille.
• Proper product placement will maintain acceptable product temperature.
• See illustration below.

MAINTENANCE – TOE-KICKS / LIGHT FIXTURES / NIGHT CURTAIN, HONEYCOMB,

THERMOMETER

1. Adjustable Front Toe-Kick (Models CO33R, CO43R, CO53R, CO63R, Etc.)

• Front toe-kick is adjustable.
• Loosen screws holding front toe-kick in place.
• Lower front toe-kick to floor.
• After case is in desired position, use silicone sealant to seal toe-kick to floor.
• See next page for removable front panel (without screws) for models CO3434RG.5716, CO3034RG.5718 and CO3034RG.5718A

2. Light Fixture
LED light fixture is at upper section of case as shown in illustration below.

• LEDs light fixtures rarely require change-out.
• See MAINTENANCE – LED LIGHT FIXTURES section in this manual for more specifics.

3. Night Curtain
Optional night air curtain is near honeycomb.

• See OPTIONAL NIGHT AIR CURTAIN OPERATING INSTRUCTIONS section in this manual for more specific illustrations.

4. Honeycomb Air Diffuser

• See PREVENTIVE MAINTENANCE – HONEYCOMB (BY TRAINED SERVICE PROVIDERS ONLY) section in this manual for complete information.

5. Thermometer

• Thermometers provide internal air temperature only (not actual food temperature).
• Use probe thermometers to determine actual product temperatures.

MAINTENANCE – REMOVABLE TOE-KICKS (NON-MAGNETIC) / REMOVABLE RISERS

(STEPS)

1. Removable Toe-Kicks

• Front toe-kick is removable.
• Simply lift up and off.
• After case is in desired position, use silicone sealant to seal toe-kick to floor.
• See previous page for adjustable front toe-kicks (with screws) on models CO33R, CO43R, CO53R, CO63R, etc.
• See next page for magnetic removable front panels.

2. Product Risers (aka “Steps”)

• Risers (“steps”) allow product to be more prominently displayed.
• Risers are to rest on decks and be placed as far back as possible (up against rear plenum) as shown in illustration below.
• See GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL) – INTERIOR in manual for instructions on cleaning risers/steps.

MAINTENANCE – REMOVABLE FRONT TOE-KICKS (MAGNETIC SYSTEM)

Removable Magnetized Front Panels

• These panels are found on models CO3434RG.5716, CO3436RG.5716, CO3034RG.5718 and CO3034RG.5718A
• Toe-kicks are shipped separately.
• Toe-kicks are to be placed on case via slot/magnet attachment method.
• Remove toe-kick by pulling away from lower magnet and lifting up and off hooks.
• No screw removal is required.
• See illustrations below
• See previous page for slot/hook removable front panels.

MAINTENANCE – LED LIGHT FIXTURES / LOCATION / REPAIR / REPLACEMENT

LED Style Light Fixtures
Removal of Faulty LED Lights:

• LED lights rarely require change-out.

• Contact Structural Concepts’ Technical Service Department for replacement LED lights.

• Turn off LED light switch.

• To remove faulty LED light, follow these steps:
  A. Disconnect plug from LED light.
  B. Using both hands, grasp LED light assembly (with its magnetic mounting clips). Pull downward and off its shelf (or header).
  C. Remove magnetic mounting clips from LED light by pressing against flange part of clip with thumb.

  Note: Mounting clips MAY be riveted to shelf or header.
  In such instances, simply remove LED light from mounting clips by pressing against flange part of clips with thumb.
  Replacement of LED lights:

• Attach magnetic mounting clips onto LED light.

• Adjust magnetic mounting clips so they are equally spaced on LED light.

• Reattach LED light assembly to its shelf/header.

• Position properly in shelf/header.

  Note: If mounting clips are riveted to shelf (or header), attach by placing LED in base of clip and then snapping into clip at FLANGE SIDE.

• Press plug’s barrel-shaped insert all the way into LED light.

• Important: If plug is not inserted ALL THE WAY IN the LED light’s orifice, the light may not energize. See “BAD” vs. “GOOD” insertion illustrations below-right.

• Turn LED light switch back on.

MAINTENANCE – OPTIONAL NIGHT AIR CURTAIN OPERATING INSTRUCTIONS

Night Air Curtain Installation & Operating Instructions

1. Use caution when handling night air curtain.
2. Display case may come with night curtain already attached. If not, a retrofit kit will be provided. If using SCC-supplied retrofit kit, attach to display case by centering night curtain along top-front of case as shown in illustration below. Attachment magnets will hold night air curtain firmly in place.
3. Grasp the handle and pull downward to desired location in front of case (as shown in illustration below).
4. To return night air curtain to its retracted position, grasp handle, lift up and away from its magnetic attachment and carefully wind night air curtain back into roll.
5. Caution! Do not allow spring-loaded night air curtain to freely snap back into roll. Doing so can eventually destroy night air curtain’s tension and retractability.
6. To entirely detach night air curtain from case, simply pull it downward and away from case. Caution! Do NOT drag night air curtain along top (underside) of case or magnets may scratch or mar surface. Simply lift night air curtain downward and away from case. Store in safe place away from foot-traffic.
7. Store in a safe and secure space until needed again.

NOTE: THE BELOW ILLUSTRATION MAY NOT EXACTLY REFLECT EVERY PARTICULAR CASE’S FEATURES OR OPTIONS.

MAINTENANCE – ELECTRICAL ACCESS AND COMPONENTS

Electrical: Access and Components
Warning, disconnect power before providing maintenance and service to unit.
1. Ballast Access

• A 6 1/2” space is provided at case rear to access electrical components (between refrigeration package and temperature controller plate).
• Electrical components such as terminal block, contactor, and ballast are in main electrical box.

2. Temperature & Defrost Control

• The case temperature is set at the factory, as determined by the case size. The temperature is controlled by a thermostat. If a temperature setting change is required, follow the instructions in the Temperature Controller section of manual.
• If service is required to the temperature control unit, call Structural Concepts. This maintenance should be performed by a certified technician.

MAINTENANCE – REAR COMPONENT LAYOUT (MODEL CO3436RG.5716 ONLY)

1. Vertical Glass Divider / Sneeze Guard
   • Vertical glass divider/sneeze guard is held securely with mounts. DO NOT lean against or strike glass or it could snap off mounts or break.

2. Removable 18” Sanalite® Wrapping Board
   • Sanalite® wrapping board is at case rear.

3. Salad Tissue Box Holder
   • Salad tissue box holder is at rear-right.

4. Sandwich Wrap Holder
   • Sandwich wrap holder is at rear-center.

5. Removable Writing Instrument Cup
   • Pens and markers are used for writing on wrapped products.
   • Note: Writing instruments are to be wiped off with sanitary wipes AFTER EACH USE.

6. Removable Sanitary Wipe Bucket
   • Sanitary wipes are designed to wipe off writing instruments after each use.

7. Removable Rear Panel
   • Rear panel is removable for cleaning purposes.
   • Simply remove six (6) Phillips® screws.
   • Carefully lift off case rear.

   Removable Holders (From Rear Panel)
   • Salad tissue box holder and sandwich wrap holders can be lifted up and off case rear for cleaning purposes. See illustrations below.

MAINTENANCE – OPTIONAL SECURITY COVER / OPTIONAL REAR FLIP-DOWN HINGED DOOR

1. Security Covers (Optional) – Models COXXRM

• Security covers are designed to prevent access to merchandiser.
• Security cover is to be placed OVER upper latch retaining clip and UNDER lower latch retaining clip.
• Lift security cover up and off with handles.

2. Locking Mechanism

• Locking mechanism key allows plate cam lock to be rotated under upper retaining clip.
• Proper rotation of plate cam lock prevents cover from being removed.

3. Key Storage / Cover Storage

• When security cover is attached to case, remove keys and store in easy-to-remember, yet secure location.
• When security cover is removed from case, store in safe, secure location away from foot traffic.

4. Rear Flip-Down Hinged Door (Optional)

• Certain models have a rear, flip-down hinged door with perforated panel (to maintain proper airflow).
• Handle is to be pulled outward to open door.
• Caution! Hold door securely while lowering it against hinges.
• If door is allowed to fall downward onto it own weight, it can damage hinges.
• Models include CO43R-FS as well as others.
• See illustration below.

MAINTENANCE – MODEL CO4836R.5716 & CO4836RG.5716 WITH REMOVABLE BREAD DISPLAY 

1. Merchandiser Overview

• Model CO4836R.5716 and CO4836RG.5716 also have s a bread display unit that sits atop counter and is protected by a glass sneeze guard. This bread display unit is also separately manufactured by SCC as Model BDXXXX.
• Stainless steel posts hold sneeze guards in position.
• Sneeze guards are glass (sides and top).
• Acrylic bread bins and bread display supports are removable.
• Stainless steel brackets suspend bread display.
• Stainless steel removable wrap cubbies are accessible at case rear.
• See illustration below.

2. Rear Panel Removal (For Cleaning Purposes)

• See MAINTENANCE – REAR COMPONENT LAYOUT (MODEL CO3436RG.5716 ONLY) section in this manual for location of the six (6) rear panel attachment points.
• Removing screws at these attachment points will allow entire rear panel to be removed from case.

REFRIGERATION – EVAPORATOR AREA: MODELS CO33R / CO43R / CO53R / CO63R

1. Evaporator Fan Access

• Remove lower decking.
• Lift decks straight up and out to avoid scratching insides of case while removing decks.

2. Thermostatic Expansion Valve Access

• TXV also becomes accessible upon removal of decking.

3. Drain

• Drain is located at center of tub (under evap. fan).
• Access to drain may also be gained by removing evaporator fan shroud.

REFRIGERATION – EVAPORATOR AREA: MODELS CO43RM / CO63RM (AND SIMILAR UNITS)

1. Evaporator Fan Access

• Remove milk crates and lower decking.
• Lift decks straight up and out to avoid scratching insides of case while removing decks.

2. Thermostatic Expansion Valve Access

• TXV is accessible upon removal of decking.
• See illustration below.

3. Drain

• Drain is located at center of tub (under TXV).
•  Access trough by removing evaporator fan shroud.

REFRIGERATION – EVAPORATOR AREA: MODELS CO3434RG.5716, CO3034RG.5718 & 5718A, ETC. 

1. Evaporator Fan Access

• Remove lower decking.
• Lift decks straight up and out to avoid scratching insides of case while removing decks.

2. Balancing Valve / Sweat Valve Access

• Balancing valve and sweat valve becomes accessible upon removal of decking.

3. Drain

• Drain is located at front right side of as shown below.
• Access to drain may also be gained by removing evaporator fan shroud.

REFRIGERATION – CONDENSATE PACKAGE ACCESS (SCREW REMOVAL REQUIRED)

Refrigeration Fundamentals
1. Condensate Package Access With Screw Removal Required

• Assembly or disassembly and servicing of condensate package is to be accomplished by a licensed refrigeration contractor.
• Refer to maintenance fundamentals for access.
• Remove rear grille (by removing 4 screws) as shown in illustration at right and below.
• See next page for units with rear grilles requiring NO screw removal.

REFRIGERATION – REAR CONDENSATE PACKAGE ACCESS (NO SCREW REMOVAL REQUIRED)

Refrigeration Fundamentals, Continued
2. Rear Condensate Package Access – No Screw Removal Required

• Assembly or disassembly and servicing of condensate package is to be accomplished by a licensed refrigeration contractor.
• Remove rear grille by grasping two (2) finger holes and pulling outward.
• Rear grille will then be free from rear panel magnets (one at each end).
• Slots of rear grille (one at each end) grille may then be lifted up and off rear panel hooks (one at each end).
• See previous page for rear grilles that require screw removal.

REFRIGERATION – FRONT CONDENSATE PACKAGE ACCESS (NO SCREW REMOVAL REQUIRED)

Refrigeration Fundamentals, Continued
3. Front Condensate Package Access – No Screw Removal Required

• Assembly or disassembly and servicing of condensate package is to be accomplished by a licensed refrigeration contractor.
  1. View of fully attached front panel and toe-kick/front grille. Note: Model CO3324R.7654 is shown for illustrative purposes only; your model may vary.
  2A. Upper front panel bracket (for top of front panel to be placed).
  2B. Lower front panel’s slot (that rests on hooks at both ends of case).
  2C. View of hook that lower front panel rests on (typ.).
  3A. Toe kick/front grille shown removed from case.
  3B. View of magnets that toe-kick/front grille attaches to. Note: Magnets are at both ends of case.
  4. If shipment damage-prevention screws are intact, they must be removed to slide condenser package out from under case.
  5. Carefully slide condenser package pan out from under case to access various components.

  Return all components to case in reverse order they were removed.

REFRIGERATION – CONDENSATE PACKAGE ILLUSTRATED PARTS BREAKDOWN (COR)**

Refrigeration Fundamentals, Continued
4. Condensate Package Illustrated Parts Breakdown

• Assembly or disassembly and servicing to be accomplished by licensed refrigeration contractor.
• After rear grille has been removed, slide condensate package out slowly and carefully.
• After service, slide back under case. Return rear grille to case and attach with four (4) retaining screws.
• See previous page for screw removal illustration.

REFRIGERATION – CONDENSATE PACKAGE (CO3436RG.5716 / CO3034RG.5718 / CO3034RG.5718A)

Refrigeration Fundamentals, Continued
5. Condensate Package Illustrated Parts Breakdown

• Assembly or disassembly and servicing to be accomplished by licensed refrigeration contractor.
• After rear grille has been removed, slide condensate package out slowly and carefully.
• After service, slide back under case. Return rear grille to case and attach with four (4) retaining screws.

GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL) – EXTERIOR

NOTE: INSTRUCTIONS ARE FOR CASE EXTERIOR ONLY (D=DAILY / W = WEEKLY / M = MONTHLY)

cloth or paper towel.
D| Acrylic Air Deflector: Clean with a mild soap and water solution and a soft cloth.
D| Glass Sneeze Guards: Clean with household or commercial glass cleaner.
D| Sanalite® Cutting Board (Model CO3434RG.5716. C04836R.5716): Sanalite® cutting boards
require very little maintenance. Use a clean cloth to thoroughly wipe entire Sanalite® surface with hot water and soap solution on a regular basis. Rinse with a spray bottle of clean water. Pat dry with clean cloth or paper towel.
D| Acrylic Bread Bins / Bread Display Supports:
Clean out bread crumbs with a paper towel or clean cloth. Wipe off any smudges or fingerprints with mild soap and warm water solution and soft cloth.
W| Magnetic Condenser Coil Filter (Self-Contained Units Only):
•This filter (accessible at case rear) helps prevent dust particles from entering condenser coil.
•Clean magnetic condenser coil filter by following either of these steps:
1.As magnetic condenser coil filter is dishwasher safe, remove from case (no screw removal required) and use a rag or soft-bristled brush to wipe off excess dust particles from filter. Run in normal dishwasher cycle. Remove from dishwasher. Dry with soft cloth or paper towel. Return to case.
2.If NOT using dishwasher, remove magnetic condenser coil filter from case. Use a rag or soft-bristled brush to wipe off excess dust particles from filter. Submerse in warm, soapy water. Use soft-bristled brush to remove dust, dirt, grease and grime that may collect on filter. Rinse thoroughly. Dry with soft cloth or paper towel or allow to air dry. Replace.
W| Model CO3434RG.5716 Salad Tissue Box Holder / Sandwich Wrap Holder:
•Clean with a mild soap and water solution and a soft cloth. Dry with paper towel or cloth.
•For more thorough cleaning, remove from case rear (by lifting up and off). Submerse in warm soapy water and use a nylon brush to remove hardened residue. Rinse thoroughly. Dry with paper towel or soft, clean cloth. Return to case.
W| Model CO3434RG.5716 Writing Instrument Cup:
•Remove from case rear (by lifting up and away from unit). Submerse in warm soapy water and use a nylon brush to remove hardened residue. Rinse thoroughly. Dry with paper towel or soft, clean cloth. Return to case.
W| Model CO3434RG.5716 Sanitary Wipe Bucket:
•Remove from case rear (by lifting up and away from unit).
•Submerse in warm soapy water and use a nylon brush to remove hardened residue.
•Rinse thoroughly. Dry with paper towel or soft, clean cloth. Return to case.
M| Night Air Curtain:
•Grasp handle, slowly raise curtain and attach to top panel (as shown in MAINTENANCE FUNDAMENTALS: NIGHT AIR CURTAIN OPERATING INSTRUCTIONS section in this manual for illustrations.
•After curtain is fully extended, wipe down with warn soapy water and soft cloth.
•After curtain has been wiped down, use spray bottle with clean water to spray surface of curtain (to remove soap residue) and dry with paper towel or soft, clean cloth.
•Return night air curtain to its retracted position slowly and carefully.

GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL) – INTERIOR
NOTE: INSTRUCTIONS ARE FOR CASE INTERIOR ONLY (D=DAILY / W = WEEKLY / M = MONTHLY)

stubborn stains/residue, TURN MAIN POWER SWITCH OFF.  Remove deck and clean with soap and water   solution or submersed in hot, soapy water solution. Rinse thoroughly. Dry. Return to case. Turn main power switch back on.
D| Product Display Risers/Steps (Optional): Remove steps for cleaning purposes.
• Light cleaning: Remove. Wipe with mild soap and water solution and soft cloth.
• Severe cleaning: Remove and submerse in warm to hot water solution.  Clean with soft cloth or non-metal brush.
D| Glass Surfaces: Clean with household or commercial glass cleaner.
W| Air Return Grilles:
• Wipe off air return airflow grilles with moist cloth.
• Return airflow grilles can be removed, submersed in warm, soapy water for more thorough cleaning.  Rinse thoroughly before returning.
M| Condenser Coil: Remove rear grille.  Vacuum or brush grille condenser coil. Use metal or fiber brush to remove dust and dirt that can collect on condenser coils.  Be careful not to damage the fins on the coil.  See REFRIGERATION FUNDAMENTALS: ACCESS / CONNECTIONS / SERVICING section in this manual for instructions on rear grille removal.

GENERAL CLEANING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY)

Due to rotating fans in area, turn off case and disconnect plug from wall outlet before beginning fan shroud (and surrounding tub area) cleaning!  1) Turn off power. 2) Remove deck from case. 3) Clean fan shroud area (and surrounding tub area) with moist cloth.
| Quarterly| Tub & Drain: Caution! Due to rotating fans in area, turn off case and disconnect plug from wall outlet before beginning tub & drain cleaning! Vacuum tub under decks.  Clean with soap and water solution. Wipe dry with clean cloth.  Keep drain free of debris to prevent clogging.
• Note: Fan shroud must be removed to access drain at center  of tub.

TROUBLESHOOTING (TO BE PERFORMED BY STORE PERSONNEL) – PAGE 1 OF 2

See LED LIGHT FIXTURES: REPAIR / REMOVAL / REPLACEMENT section in this manual for specifics.
| Check circuit breaker box for tripped circuit.
| If case lights still do not come on, call service provider.
Case Light Is Not Working| Check that ALL of the light cords and plugs are properly connected.
This includes the following items:
• Oval form of plug must connect to oval form of LED light.
• See MAINTENANCE FUNDAMENTALS – LED LIGHT FIXTURE /LOCATION / REPAIR / REPLACEMENT section in this manual for more specifics including illustrations.
| If case light still does not come on, call service provider.
Case is Not Holding Proper Temperature| If a large amount of warm product was added to the case, it will take time for the temperature to adjust.  Product must be pre-chilled before placing
in case.
| Check that the case is not in the sun or near a heat or air-conditioning vent.  See OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS section in manual for specifics.
| If case is located near front doors, temperature fluctuation can hinder unit’s ability to maintain temperature. See OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS  section in this manual for specifics.
| Check that filter and condenser coil has been cleaned. See GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL) section in this manual for specifics.
| Check air return grilles (area at front of decking) for obstructions. DO NOT set product on air grilles as this will prevent proper airflow!
| If case still is not holding proper temperature, call service provider.

TROUBLESHOOTING (TO BE PERFORMED BY STORE PERSONNEL), CONT’D – PAGE 2 OF 2

LED Style Light Fixtures
Removal of faulty LED light:

• LED lights rarely require change-out.
• To remove faulty LED light, simply grasp light near retaining spring and carefully pull away from its spring. Disconnect plug from LED’s socket.
• Contact Structural Concepts’ Technical Service Department for replacement parts (see Technical Service section of this manual for information).

Replacement of LED light:

• To replace LED light fixture, simply insert new LED light at proper position (socket must be near plug). Carefully snap into metal springs so LEDs are held firmly in place.

• Note: LED light and plug must be connected in a specific manner or they will not work.
  A. Certain plug designs (“barrel type”) merely require that plug be pushed all the way in.
  B. Other plugs require “oval edge” of plug to connect to oval edge of LED light.

• See illustrations below.

TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY)

• For Type 1 Conditions (most cases): ambient conditions are to be at 55% max. humidity / 75 °F.
• For Type 2 Conditions: ambient conditions are to be at 60% maximum humidity / 80 °F.
| Check that the hot gas condensate pan is properly connected and heating.
| Wicking material (optional) may be dirty or worn and need replacement (hot gas loop condensate system).
• Slide refrigeration system out from under unit.
• After refrigeration system has been slid out from under unit, replace wicking material with new. If wicking material is not available, contact Structural Concepts®. See toll-free number at last page of this manual.
Fan Emits Excessive Noise| Check that the case is aligned, level and plumb.
| Check evaporator fan for cleanliness.
| Unplug/power off fan motor. Check motor shaft for bearing wear.
| Check that fan motor is securely mounted in bracket.
| Verify that fan blades are securely mounted to fan motor.
| Check that nothing is preventing blade rotation.
| Check that the fan shroud is properly secured.
Fan Is Not Working| Check that the MAIN power switch is on.
| Check that fan motor is plugged in at the fan shroud.
| Check for foreign material obstructing fan performance.
| Check that fan blades freely rotate within fan shroud.
| Check that power is going to fan.
| Check that fan wiring is connected on terminal blocks.
Digital Control Display Is Blank.| Check that the MAIN power switch is on.
| Check the circuit breaker box for tripped circuits.
System Not Operating| Check that the utility power is on.
| Check that the MAIN power switch is on.
| Check the circuit breaker box for tripped circuits.

TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY), CONTINUED

instructions.
| Check voltage at LED driver. If voltage is entering but not exiting, LED driver may be faulty.
| Check connection at case rear (from field wiring box) for voltage.
Case Light Is Not Working| Follow previous page’s System Not Operating instructions.
| If case light still do not come on, call SCC Technical Service phone number (listed on last page of this operating manual).
Control Display Is Flashing| See your case’s thermostat label (near temperature controller) for your model’s required settings.
Case Is Not Holding Temperature| If a large amount of warm product was added to the case, it will take time for the temperature to adjust. Unit needs product to be pre-chilled.
| Temperature changes during defrost mode but will return to normal. Fourth LED (on temperature controller) will indicate defrost cycle in progress.
| Check that case is not in sun or near a heat or air-conditioning vent.
| If case is located near front doors, temperature fluctuation can hinder unit’s ability to maintain temperature.
| Check that condenser coil has been cleaned.
| Check air grilles for obstructions.
| Check sight glass for flashing and/or low charge.
| Check Set Point Temperature; it may be adjusted too high.
Condensing Unit Is Not Operating| Check that the power is turned on.
| Determine if temperature controller settings are properly set. See your case’s serial label for your model’s specified settings. See SERIAL LABEL LOCATION & INFORMATION LISTED / TECH INFO & SERVICE section in manual for label location, etc.

TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) – CONDENSING SYSTEM

covered.
| Check that condensing fans are working.
| Check that refrigerant is not overcharged.
| Perform sub-cooling check and verify that no contaminates are in system.
| Check that liquid line filter dryer is not plugged.
| Check that close-offs are intact (around condensing coil) and that air is not recirculating.
| Check that store ambient temperature isn’t above maximum allowed. See OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS section in this manual.
Head Pressure Too Low| Check if sight glass is flashing or showing low charge.
| Check that suction pressure isn’t too low.
| Check that compressor reed valves aren’t bad. Look for high suction/low head pressure. Perform pump down.

TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) – EVAPORATOR SYSTEM

lines and/or hoses are not kinked on either high or low sides.
| Check that evaporator fan motors are working.
| Check superheat.
| Check that there is no air recirculation around evaporator coil.
| Check that evaporator coil is not iced up.
High Suction Pressure| Check for refrigerant overcharge.
| Check that compressor reed valves aren’t bad. Look for high suction/low head pressure. Perform pump down.
| Check that the “cooling load” isn’t high. Product must be pre-chilled before placing in refrigerated section of case.
| Check that case is at least 15-feet from exterior doors, overhead HVAC
vents or any air curtain disruption.
| Check that unit is not exposed to direct sunlight via windows or any other heat source (ovens, fryers, etc.).
| Check that superheat adjustment isn’t low.
| Check TXV bulb installation
a. Poor thermal contact.
b. Warm location.

PREVENTIVE MAINTENANCE (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY)
WARNING! TURN OFF CASE BEFORE PERFORMING PREVENTIVE MAINTENANCE!

PREVENTIVE
MAINTENANCE| FREQUENCY| INSTRUCTIONS
---|---|---
Case Exterior| Quarterly| Condensing Coil:
• Remove rear grille (by lifting up and off).
• Use air pressure or industrial strength vacuum; clean dust and dirt that may collect on the Condenser Coil.
• Caution! Coil fins are sharp. Handle with care!
• Replace rear grille to case.
| Quarterly| Refrigeration Package/Compressor Area: Caution!  Be certain to disconnect power from case before cleaning Refrigeration Package!
• Warning! Condensate Pan Is HOT!  Disconnect power from case and allow to cool before cleaning evaporator pan!
• Slide/Roll compressor package out from under case.
• See REFRIGERATION FUNDAMENTALS section for in-depth instructions on accessing the evaporator pan.
• Use a scrub-brush and a de-scaling solution such as CLR® (to prevent corrosion, lime and rust). Follow instructions as to proper dilution, safety precautions and scrubbing method.
• After thoroughly cleaning pan with scrub-brush and solution, rinse thoroughly with clean water (in spray bottle) and wipe dry with sponge or paper towel.
• Use moist cloth to wipe off dust & debris that collects on various parts (fans, sight glass, overflow pan, etc.).
• Slide refrigeration assembly back under case.
• Replace front panel and lower grille via hooks (no screws required).
| Quarterly| Under Case Cleaning: Once refrigeration package is clear of unit, vacuum under case to remove all dust and dirt that may collect under case.
Case Interior| Quarterly| Tub, Coil, Drain, Fans, Brackets:
• Remove decking.
• Use vacuum to clean entire area.
• After vacuuming, clean area with warm water, clean cloth, and mild soap solution.
• Remove any debris that may clog drain.
| Quarterly| Honeycomb: Check honeycomb air diffuser to determine whether it is dirty.  If dirty, remove from case.  See PREVENTIVE MAINTENANCE:
HONEYCOMB AIR DIFFUSERS (TRAINED SERVICE PROVIDERS ONLY) section of this manual (next page) for cleaning specifics.

PREVENTIVE MAINTENANCE – HONEYCOMB (BY TRAINED SERVICE PROVIDERS ONLY)

1. Honeycomb Air Diffuser Removal
   See PREVENTIVE MAINTENANCE (TO BE PERFORMED BY TRAINED SERVICE PROVIDER) section in this manual for cleaning frequency.
   A. Wedge a non-metallic device of suitable strength (such as a ballpoint pen) between the honeycomb and the end panel.
   Caution! Use care not to dislodge the heating wire (that prevents condensation on the lamp assembly).
   B. Apply pressure to collapse the honeycomb to allow it to be pulled out of honeycomb retainer.
   C. Carefully pry downward and away from the honeycomb retainer.
   Clean honeycomb with warm water and soap solution. Submerse if necessary. Use brush to dislodge stubborn or sticky residue. Dry by using vacuum’s blow mode (vs. suction mode).

2. Honeycomb Air Diffuser Installation
   D. Squeeze honeycomb to allow it to fit into the honeycomb retainer.
   E. Carefully slide honeycomb into place.
   F. Adjust honeycomb so that it fits flat against retainer. It must not be wavy or out of position.
   Note: For honeycomb air diffusers in other locations, these same general instructions apply.

SERIAL LABEL LOCATION & INFO LISTED / TECH INFO & SERVICE / REFRIGERATED CASES ONLY

Serial Label Location & Information Listed /Technical Information & Service

• Serial labels are affixed at a wide range of places (on the header, near thermostat, at case rear, behind panels/toe-kicks, on electrical boxes, etc.).
• Serial labels contain electrical, temperature and refrigeration information, as well as regulatory standards to which the case conforms.
• Sample serial label shown below.
• For additional technical information and service, see the TECHNICAL SERVICE page in this manual for instructions on contacting Structural Concepts’ Technical Service Department.

PROGRAMMABLE CONTROLLER (SELECT, CLICK ON OR SCAN QR CODE FOR

INFORMATION)

Determine Which Programmable Controller Is On Your Case (Controllers That Are Commonly Used By Structural Concepts Are Shown Below).
Your Particular Programmable Controller May Differ.

To Access Information About The Programmable Controller That Is Used On Your Case, Follow These Instructions:

If Viewing This Document on Smart Phone, Tablet or Computer, Select/Click On The QR Code at Right.
If Viewing This Document In Print (Hard Copy), Scan The QR Code at Right With Your Smart Phone or Tablet.

https://scnv.io/Qixy?qr=1

STRUCTURAL CONCEPTS TECHNICAL SERVICE CONTACT INFORMATION & LIMITED WARRANTY

TECH SERVICE/WARRANTY CONTACT INFO:
1 800-433-9490 / EXTENSION 1

DAYS/HOURS AVAILABLE:
MONDAY – FRIDAY (CLOSED HOLIDAYS)
8:00 a.m. TO 5:00 p.m. EST
YOU MUST HAVE THE FOLLOWING INFO AVAILABLE BEFORE CONTACTING STRUCTURAL CONCEPTS:
SERIAL NO. / MODEL NO. / STORE NO. / STORE ADDRESS / DETAILS (PHOTOS, LEAK LOCATIONS, DAMAGE, STORE’S AMBIENT CONDITIONS, ETC.)

To Access The Limited Warranty To Your Case, Follow These Instructions:

If Viewing This Document on Smart Phone, Tablet or Computer, Select/Click On The QR Code at Right.
If Viewing This Document In Print (Hard Copy), Scan The QR Code at Right With Your Smart Phone or Tablet.

https://scnv.io/6nkQ?qr=1

References

• P65Warnings.ca.gov
• Delivering Fresh. Always. | Structural Concepts
• Processing QR Code
• Processing QR Code

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