READ AND SAVE THESE INSTRUCTIONS
INSTALLATION AND
OPERATING MANUAL
P/N 99523
SELF-CONTAINED REFRIGERATED SERVICE / SELF-SERVICE MERCHANDISERS
Model COU2757R
Shown at Right
Model COU2757R………..27 1/2”L* x 57”H x 33”D
Model COU2757R.3748…27 1/2”L* x 57”H x 33”D
Model COU2757R.4031....27 1/2”L* x 57”H x 33”D
Model COU2757R.5427....27 1/2”L* x 57”H x 33”D
*Includes end panels.
888 E. Porter Road · Muskegon, MI 49441 Phone: 231.798.8888 Fax: 231.798.4960 www.structuralconcepts.com
Operating Manuals\Oasis\COU2757R_3748_4031_5427_99523.pub
Rev M Date: 12.29.2014
TABLE OF CONTENTS
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING ……….....………….
START-UP AND OPERATION ..….…………...…...…..…………………………………….…….…………
MAINTENANCE FUNDAMENTALS ….…………...….....……………..………………………………….…
ELECTRICAL & REFRIGERATION FUNDAMENTALS ……...………..……………………….………….
REFRIGERATION FUNDAMENTALS ………………………………………………………………………..
SERIAL LABEL LOCATION & INFORMATION LISTED / TECHNICAL INFO & SERVICE …………….
CLEANING SCHEDULE (TO BE PERFORMED BY STORE PERSONNEL) …………………………….
CLEANING SCHEDULE (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) .....…..
PREVENTIVE MAINTENANCE - HONEYCOMB AIR DIFFUSERS (TO BE PERFORMED BY
TRAINED SVC. PROVIDERS ONLY) …………………..…………………………………..……….
TROUBLESHOOTING (TO BE PERFORMED BY STORE PERSONNEL) ……………………..……….
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) ………..
TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - CONDENSING SYSTEM …..
TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - EVAPORATOR SYSTEM ….
ILLUSTRATED PARTS BREAKDOWN - COU2757R ……………………………………………………..
PARTS LIST - COU2757R ……………………………………………………………..……………………...
GENERAL LAYOUT OF CONDENSER PACKAGE ………………………………………………………..
CAREL® CONTROLLER - PROGRAMMING THE INSTRUMENT….…………………………….……....
CAREL® CONTROLLER - USER INTERFACE, SUMMARY TABLES OF ALARMS & SIGNALS …….
CAREL® CONTROLLER - Summary Table of Operating Parameters (After Programming Key) ……..
SCC TECHNICAL SERVICE CONTACT INFORMATION & LIMITED WARRANTY ……………………
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OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING - PAGE 1 of 2
OVERVIEW
The upper (service) section of this case is designed to
merchandise packaged/unpackaged, non-hazardous/
hazardous, product at ambient temperatures.
The lower (self-service) section of this case is
designed to merchandise packaged/unpackaged,
non-hazardous/hazardous, product at 41 °F (5 °C) or
less product temperatures.
Product must be pre-chilled at 41 °F (5 °C) or less
prior to being placed in refrigerated areas of case.
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. See SERIAL LABEL LOCATION &
INFORMATION LISTED / TECH INFO & SERVICE
section in this manual for sample serial labels.
COMPLIANCE
Performance issues when in violation of applicable
NEC, federal, state and local electrical and plumbing
codes are not covered by warranty.
See below compliance guideline.
WARNINGS
This page contains important warnings to prevent
injury or death.
Please read carefully!
PRECAUTIONS and WIRING DIAGRAMS
See next page for PRECAUTIONS and WIRING
DIAGRAM information.
ATTENTION
CONTRACTORS
WARNING
ELECTRICAL
HAZARD
WARNING
KEEP
HANDS
CLEAR
WARNING
HOT
SURFACE
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.
WARNING
Condenser Pan is Hot!
Disconnect or turn off unit and allow to cool
before cleaning or removing from case.
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OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING - PAGE 2 of 2
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.
CAUTION! LAMP REPLACEMENT GUIDELINES
LED lamps reflect specific size, shape and overall design.
CAUTION
Any replacements must meet factory specifications.
Fluorescent lamps have been treated to resist breakage and
must be replaced with similarly treated lamps.
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.
WIRING DIAGRAM
Each case has its own wiring diagram folded and in
its own packet.
Wiring diagram placement may vary; it may be
placed near ballast box, field wiring box, raceway
cover, or other related location.
CAUTION
CAUTION! ADVERSE CONDITIONS / SPACING ISSUES
Performance issues caused by adverse conditions are NOT covered
by warranty.
End panels must be tightly joined or kept at least 6-inches away from
any structure to prevent condensation.
Unit must be kept at least 15-feet from exterior doors, overhead HVAC
vents or any air curtain disruption to maintain proper temperatures.
Unit must not be exposed to direct sunlight or any heat source (ovens,
fryers, etc.).
Tile floors, low ceilings or small rooms will increase noise level.
Whisper Cool compressor blanket or remote unit may resolve noise
level issues.
Keep at least 8-inch clearance above unit for air discharge
(self-contained units only).
CAUTION! CHECK CONDENSATE PAN POSITION AND PLUG
Water on flooring can cause extensive damage!
Condensate pan MUST BE positioned directly under condensate drain.
Condensate pan plug MUST BE securely plugged into receptacle.
Before powering up unit, check the following:
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START-UP AND OPERATION
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 the main power switch is off.
Plug cord into a certified 110V electrical outlet
with ground.
Turn main power on.
Remove upper front panel (See maintenance
for panel removal). Switch is on the right side
of case.
Coil fan 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, the unit will require
75-minutes running time to pull-down temperature.
Turn lights on.
Light switch is a rocker type on the under right
side of the top light.
The lights should come on at the same time.
First time lighting may require a short warm-up
period for the bulbs. Slightly dim or a flickering
of new bulbs is normal.
It is recommended that the self-contained
refrigerated cases maintain front and rear airflow
clearance of approximately twelve inches.
Obstruction or restriction of air can void warranty.
Note: Case temperature is set at the factory, as
determined by the case size.
Temperature is controlled by a thermostat.
If a temperature setting change is required,
refer to the instructions for the temperature
controller operating section of this manual.
Note: See serial label on case for set point.
Main Power Switch
Rocker Switch
ON
OFF
Light Switch
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MAINTENANCE FUNDAMENTALS
Removing the Front Panel
Lifting the panel from lower edge upward
approximately a half inch into a channel lip,
disengages the support taps on the lower edges.
Pivot out lower edge approximately one inch
and lower panel to remove.
Removing the Front Grille
Lifting the grille upward approximately a half inch
disengages a top support flange and the support
taps on the back lower side of the grille from the
frame .
Pivot out lower edge and remove grille.
Removing the Rear Doors
Move the rear doors toward the center of the
case.
Individually lift each door up toward the top of
the case and pivot the bottom of the door out
from track.
Removing Interior Shelving:
Remove the rear doors.
Remove the glass or ABS shelving.
Remove the rear shelf support from brackets.
Remove shelf light from brackets and rotate to
facilitate maintenance.
Note: shelf light cannot be remove without
being disassembled.
Shelf brackets can not be removed.
Light Fixture
Removal of lamp:
Rotate lamp (1/4 turn) and remove bulb.
Installation of lamp:
Align pins with slot.
Insert pins into socket and rotate 1/4-turn to
secure pin contacts in socket.
Channel Lip
Upper Front Panel
Support Tabs
Support Flange
Support Tabs
Glass or ABS Shelves
Shelf Light
Front Grille
Support Rest
Rear Shelf Support
Sample Fluorescent Light Fixture
Shelf Brackets
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ELECTRICAL & REFRIGERATION FUNDAMENTALS
Electrical: Access and Connections
Warning, disconnect power before providing
maintenance and service to unit.
Ballast access
Remove 4 screws from the back of the top cap
to access electrical connections and ballasts.
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 for the Carel® Controller in the
technical information section of this operating
manual.
If service is required to the temperature
control unit, call Structural Concepts. This
maintenance should be performed by a
certified technician.
Ballast
Top Cap Rocker Switch
Temperature
Controller
Approximate Ballast
locations (illustration may
not be exactly as shown)
7
REFRIGERATION FUNDAMENTALS
Evaporator fan access
Remove lower decking. A finger hole is provided
to assist in lifting up and pulling out deck.
Expansion valve access
Remove lower decking. A finger hole is provided
to assist in lifting up and pulling out deck.
Remove fan shroud assembly.
Unplug the fan at the shroud support.
Remove four screw knobs from the fan
shroud.
Carefully remove shroud to avoid damage to
mirrors or front air deflector.
Refrigeration:
Access and Connections
Assembly or disassembly and servicing to
be accomplished by licensed refrigeration
contractor.
Refer to maintenance fundamentals for access.
Remove front panel.
Remove front grill.
Fan
Shroud
Lower Decking
Evaporator
Fan
Hot Gas Evaporator
8
Refrigerant Service Fittings
Front of Case
Carel Controller®
Sight Glass
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