Structural Concepts Impulse Series Installation instructions

Rev A Date: 8.28.2013
READ AND SAVE THESE INSTRUCTIONS
SERVICE DROP-IN
REFRIGERATED
MERCHANDISERS WITH
STRAIGHT GLASS
I:\Oper Manuals\Impulse\DGS24XXR_DGS36XXR_DGS48XXR_20-31140.pub
P/N 20-31140
INSTALLATION &
OPERATING MANUAL
888 E. Porter Road · Muskegon, MI 49441 Phone: [phone] Fax: [phone] www.structuralconcepts.com
Model
DGS4830R
Model
DGS2430R
Model
DGS3623R
Note: See Next Page For:
 Dimensions of All Models
Covered By This Manual
 Counter (Base) Cutout
Dimensions For All
Drop-In Units

Model DGS2423R 26 1/8”L x 28 5/8”D x 22 3/8”H (Upper Display Case Only)
26 1/8”L x 28 5/8”D x 46 3/4”H (Upper Display Case + Drop-In Refrigeration Unit)
Model DGS2430R 26 1/8”L x 28 5/8”D x 29 3/8”H (Upper Display Case Only)
26 1/8”L x 28 5/8”D x 53 3/4”H (Upper Display Case + Drop-In Refrigeration Unit)
Model DGS3623R 38 1/8”L x 28 5/8”D x 22 3/8”H (Upper Display Case Only)
38 1/8”L x 28 5/8”D x 46 3/4”H (Upper Display Case + Drop-In Refrigeration Unit)
Model DGS3630R 38 1/8”L x 28 5/8”D x 29 3/8”H (Upper Display Case Only)
38 1/8”L x 28 5/8”D x 53 3/4”H (Upper Display Case + Drop-In Refrigeration Unit)
Model DGS4823R 50 1/8”L x 28 5/8”D x 22 3/4”H (Upper Display Case Only)
50 1/8”L x 28 5/8”D x 46 3/4”H (Upper Display Case + Drop-In Refrigeration Unit)
Model DGS4830R 50 1/8”L x 28 5/8”D x 29 3/4”H (Upper Display Case Only)
50 1/8”L x 28 5/8”D x 53 3/4”H (Upper Display Case + Drop-In Refrigeration Unit)
Note: Internal counter height must be at least 28” for refrigeration and proper air flow space.
Models DGS2423R & DGS2430R: Service Top Cutout dimensions must be 24.65” Long x 27.15” Deep (with a
minimum 1.42” perimeter) for proper clearance and fit of Drop-In Refrigerated Merchandiser. These combined
dimensions require a 30” minimum counter top space for cutout.
Models DGS3623R & DGS3630R: Service Top Cutout dimensions must be 36.65” Long x 27.15” Deep (with a minimum
1.42” perimeter) for proper clearance and fit of Drop-In Refrigerated Merchandiser. These combined dimensions require
a 30” minimum counter top space for cutout.
Model DGS4823R & DGS4830R: Service Top Cutout dimensions must be 48.65” Long x 27.15” Deep (with a minimum
1.42” perimeter) for proper clearance and fit of Drop-In Refrigerated Merchandiser. These combined dimensions require
a 30” minimum counter top space for cutout.
2
TABLE OF CONTENTS
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING ……...….…….....…..
CUSTOMER CABINET PROVISIONS…………………..…………………..…….………….....…………...
CLEARANCE AND AIR FLOW ...………………………..…………………..…….………….....…………....
VENTING INSTRUCTIONS FOR AIR INTAKE / EXHAUST (FOR ALL CASES) ..……….....…………..
INSTALLATION: SKID REMOVAL / LOWERING INTO COUNTER (BASE) / SEALING ..……………..
START-UP AND OPERATION / TEMPERATURE SETTINGS / THERMOMETER .…..…………….….
MAINTENANCE FUNDAMENTALS: SHELF / SHELF REMOVAL / MINI-LED LIGHT FIXTURES …...
MAINTENANCE FUNDAMENTALS: T-8 LIGHT FIXTURES / KEY (FRONT ACCESS) ..………..…….
MAINTENANCE FUNDAMENTALS: REMOVING REAR DOORS / HINGED DOOR …………………..
MAINTENANCE FUNDAMENTALS: EVAPORATOR COIL FANS ACCESS AND REMOVAL …..…...
REFRIGERATION FUNDAMENTALS: ACCESS TO CONDENSER COIL / SERVICING /
TEMPERATURE CONTROL MODULE ……………………………………………………………...
CONDENSATE PACKAGE EXPLODED PICTORIAL (APPLICABLE TO MODEL DGS48XXR) ….….
CONDENSATE PACKAGE EXPLODED PICTORIAL (APPLICABLE TO DGS24XXR & DGS36XXR).
SERIAL LABEL LOCATION & INFORMATION LISTED / TECH INFO & SERVICE …………....……...
TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) ……………………………...…..
TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - CONDENSING SYSTEM ….
TROUBLESHOOTING (BY TRAINED SERVICE PROVIDERS ONLY) - EVAPORATOR SYSTEM ….
CLEANING SCHEDULE ....………………………………………………………...…...………………….….
CAREL® TEMPERATURE CONTROLLER INFORMATION ………………..…………………………….
TECHNICAL SERVICE CONTACT INFORMATION & WARRANTY INFORMATION ………….……...
3-4
5
6
7
8
9
10
11
12
13
14
15
16
17
18-20
21
22
23-25
26
27

3
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 insure proper
performance.
 Improper use will void warranty.
TYPE
This unit is designed for the display of products in ambient
store conditions where temperatures and humidity are
maintained within a specific range.
 For Type 1 Conditions (most cases): ambient
conditions are to be at 55% maximum humidity and
maximum temperatures of 75 °F (24 °C).
 For Type 2 Conditions: ambient conditions are to be
at 60% maximum humidity and maximum
temperatures of 80 °F (27 °C).
 If unsure if unit is NType 1 or 2, 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.
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
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
Condensate Overflow Pan Electric Coil Is Hot!
Disconnect and allow to cool
before cleaning or accessing in any manner.
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.
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING - PAGE 1 of 2

4
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING - PAGE 2 of 2
CAUTION! ADVERSE CONDITIONS / SPACING ISSUES
 Performance issues caused by adverse conditions are NOT covered
by warranty.
 Unit must be kept at least 15-feet from exterior doors, overhead HVAC
vents or any air curtain disruption to maintain proper temperatures.
 So not exposed to direct sunlight or heat sources (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
CAUTION! LAMP REPLACEMENT GUIDELINES
LED lamps reflect specific size, shape and overall design.
Any replacements must meet factory specifications.
Fluorescent lamps have been treated to resist breakage and
must be replaced with similarly treated lamps.
CAUTION
PRECAUTIONS
 Following are important precautions to prevent
damage to unit or merchandise.
 Please read carefully!
 See previous page for specifics on OVERVIEW, NSF
TYPE, COMPLIANCE and WARNINGS.
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! CHECK CONDENSATE PAN POSITION AND PLUG
Water on flooring can cause extensive damage!
Before powering up unit, check the following:
 Condensate pan MUST BE positioned directly under condensate drain.
 Condensate overflow pan plug MUST BE plugged into receptacle.
WIRING DIAGRAM FORMAT & LOCATION
 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! 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.

CUSTOMER CABINET PROVISIONS
Customer Cabinet Provisions
 Customer provided cabinet must adhere to the minimum requirements in ANSI/UL Std. 471 and ANSI/
NSF Std. 7.
 Among the factors that are to be taken into consideration when judging the acceptability of a cabinet or
similar enclosure are mechanical strength, resistance to impact, moisture-absorptive properties, flame
resistance, resistance to distortion at temperatures to which the material may be subjected under
conditions of use, and resistance to corrosion.
 Customer provided cabinet or similar enclosure shall have the strength and rigidity necessary to resist
conditions of intended use without increasing the risk of fire or injury to persons due to total or partial
collapse. Cabinet or similar enclosure must be strong enough to hold weight of cabinet and intended
product load. Dry weight (no product in case) exceeds 500 pounds.
 A nonmetallic cabinet or similar enclosure (or part of an enclosure) shall have a flame spread index of not
more than 200 when tested in accordance with the Standard for Tests for Surface Burning
Characteristics of Building Materials, UL 723.
 The cabinet or similar enclosure shall be constructed and assembled to reduce the risk of fire due to the
emission of molten metal, burning insulation, flaming particles, or the like, through openings onto
flammable material, including the surface over which the refrigeration is mounted.
 A sheet metal cabinet or similar enclosure is to be judged for acceptability with respect to its
size, shape, metal thickness. Sheet metal such as galvanized or stainless shall be 0.30 inch
(22 gage) or greater.
 Steel enclosures shall be protected against corrosion by metallic or nonmetallic coatings, such
as plating or painting.
 The refrigeration access panel/door shall be arranged so that main power switch, refrigeration controller
and refrigeration package are accessible without removing parts other than access panel/door.
 A hinged or pivoted panel shall be positioned or arranged so that when it is in an open position
falling or swinging due to gravity or vibration will not cause injury to persons.
 For electrical protection when installed in its intended manner, louvers and other openings in the
enclosure shall be constructed and located to reduce the risk of unintentional contact with moving, live or
hot parts such as fan blades and condensate trays. The minor dimension of such openings shall not
exceed 3 inches—See Table 6.1 for Clearance from Openings. Tools are required to remove covers,
panels or grilles unless interlock is provided.
 Ventilation openings/louvers shall be free of sharp edges and burrs and have spaces large enough to
allow for easy cleaning. Louvers that may be subject to splashes, spills, and overhead drips shall be of a
drip-deflecting design.
5

CLEARANCE AND AIR FLOW
6
Service Top Cutout Dimensions
Note: See Manual Cover for Service Top Cutout
Dimensions.
Clearance Dimensions
The Refrigerated section must maintain airflow clearance.
Dimensions are as follow.
1. 4" Minimum Spacing from bottom of refrigeration frame
to bottom of cabinet or floor required for adequate air flow.
2. 9 1/2" Countertop / Facia enclosure space on cabinets
or counter to allow for pullout system slide-out.
3. 15" Minimum opening in back of cabinet or counter
(to pull out refrigeration system).
4. Back of counter / cabinet ventilation must be at specific
space to allow for proper air intake and exhaust. See
illustration at right.
5. Front of counter ventilation must be at least 2” to allow
proper air intake and exhaust. See illustration at right.
6. Obstruction or restriction of air can void warranty.
Note: See Venting Instructions sections (next page)
for more specific air Intake and air exhaust clearance
dimensions.
4” (SEE NOTE 1)
ABOVE ILLUSTRATION APPLIES
TO ALL MODELS
2” MIN. (SEE NOTE 5)
15”
(SEE NOTES
3 & 4)
9 1/2” (SEE
NOTE 2)

VENTING INSTRUCTIONS FOR AIR INTAKE / EXHAUST - ALL CASES
7
WARNING!: The MINIMUM intake and exhaust areas must be allowed (as illustrated
below) or case temperatures may fluctuate beyond safe parameters!
NOTES:
1. THE IDEAL CONDITION FOR REAR OF CABINET IS TO HAVE COMPLETE OPEN SPACE (WITH NO DOORS
OR BLOCKING OF AIRFLOW WHATSOEVER).
2. SHOULD CABINET DOORS BE DESIRED (AS SHOWN BELOW) LOUVERS (or SCREENING) MUST BE
PROVIDED.
LOUVERS (or SCREENING) MUST BE 2” OR CLOSER TO EACH OTHER VERTICALLY.
LOUVER (or SCREENING) MUST EXTEND AT LEAST 4” BEYOND EACH END OF REFRIGERATION UNIT.
THIS SHEET REFLECTS THE MINUMUM REQUIRED VENTILATION. ADDITIONAL VENTILATION IS
RECOMMENDED AND WILL HELP MAINTAIN ACCEPTABLE MERCHANDISING TEMPERATURES.
3. SEE REFRIGERATION FUNDAMENTALS FOR VIEW OF CONDENSING UNIT AFTER SLIDE-OUT.
4. UNITS WITH REAR REFRIGERATION PACKAGE SLIDE-OUT (AS SHOWN BELOW) MUST MAINTAIN AT
LEAST A 3-FOOT SPACE BETWEEN REAR OF CABINET AND WALL TO ALLOW FOR SERVICE.
5. UNITS WITH FRONT REFRIGERATION PACKAGE SLIDE-OUT CAN HAVE REAR OF CABINET FLUSH TO
WALL, IF DESIRED.
4” Minimum
Air Exhaust
Space 4” Minimum Air
Exhaust Space
4” Minimum Air Exhaust Space
Cabinetry MUST provide access space
to allow rear slide-out of refrigeration
package. Measure before building!
2” Maximum Vertical Space Between Louvers
Louvers (or screening) must extend at least
4” beyond each end of refrigeration unit.
ILLUSTRATION BELOW REFLECTS REAR VIEW OF CABINET AFTER
POSITIONED ON CUSTOMER-SUPPLIED COUNTER/BASE

2. Display Case Design
 As shown above-left, SCC® service drop-in
refrigerated unit consists of two sections:
> The upper display case
> The drop-in refrigerated section
 As both sections make up one conjoined unit, it
is heavy and cumbersome.
 See next section for instructions on lowering
drop-in refrigerated section into counter.
3. Lowering The Drop-In Refrigerated Section
Into The Counter (Base)
 A concerted team effort may be required for
lowering drop-in section into customer supplied
counter (base). See top-right illustration.
 The following is a proven method to lower the
drop-in section into the customer supplied
counter (base); however, it may NOT be the only
method. A fork lift is required to use this method.
A. Spread the forks (of fork lift) apart to fit under
either side of the upper display case (the
extended part of the unit that rests on counter).
B. Carefully raise into position above counter.
C. Place ¾” blocks of wood under two opposing
sides where it is to be lowered.
D. Lower into the opening of the counter.
E. After it is lowered all the way into the opening, it
will be resting on the two small wood blocks at
opposite sides.
INSTALLATION: SKID REMOVAL / LOWERING INTO COUNTER (BASE) / SEALING
8
1. Remove Case From Skid
Caution: Case must always remain supported or
center of gravity may allow case to fall. Slide to
rear of skid and tip backward off skid while
maintaining support. See illustration below.
Slide
Skid
Out
FirmlyHold
Rearof
CaseWhile
Sliding
CaseOff
FromSkid
Drop-In
Refrigerated
Section
Upper
Display
Case
Customer Supplied
Counter (Base)
Seal
Along
Here
Seal
Along
Here
F. Place a small protective piece of ABS or wood
shim into place (to protect the counter) and use a
small pry bar to slightly raise the unit upward.
G. After unit is slightly raised, remove the wood piece
from under unit; then slowly lower into place,
allowing unit to gingerly rest on countertop without
scratching or marring surface.
H. Use the same process used on the
opposite side.
4. Seal Upper Display Case to Base
 NSF® listed industrial grade silicone
sealant is recommended.
 Clip tip to allow a Ø1/8” to Ø3/16”
hole.
 Beginning at case rear, run a
consistent, solid bead of silicone
around entire perimeter.
 See illustration of sample industrial
grade silicone sealant at right.

START-UP AND OPERATION / TEMPERATURE SETTINGS / THERMOMETER
1. Case Start-Up
 Plug cord into a certified electrical outlet with
ground.
 Turn on the Main Power Switch. Switch is in the
Drop-In Refrigerated Section on the rear right
hand side of base.
 The Temperature Control Module (LED) will
illuminate. Evaporator coil fans and the
compressor motor should turn on.
 From the front of the case, raise deck to confirm
that the coil fans are functioning properly.
 Turn on the lights. Light Switch is in the Upper
Display interior of the case at rear right side
(see illustration at right).
 First time lighting may require a short warm up
period for the bulbs. Slightly dim or a flickering
of new bulbs is normal.
9
—– Main Power “Rocker”
OFF
ON
Main Power
“Rocker” Switch
Spirit-Filled
Thermometer
Glass Shelf
Drop-In
Refrigerated
Section
Deck
Magnetic Filter (For Internal
Condensate Package)
Upper Display
Case
2. Temperature Settings
 This case has been tested to maintain a
temperature at or below 41 °F (5 °C)
 When the merchandiser is in a start-up mode or
has been idle for a long period of time, the unit
requires 30 minutes in order to pull-down to
temperature.
 Spirit-filled thermometer located in refrigerated
compartment is for monitoring warmest air
temperature in accordance with NSF® Std. 7.
 The temperature is controlled by a temperature
control module. It is located at the lower-right
area (from case rear) of the drop-in refrigerated
section. See below for general location.
 If a temperature setting change is required,refer to
instructions in the temperature controller section
of this operating manual.
Light Switch Inside
(at Top of Plenum)

--- Shelf Bracket Illustration Shown Below ---
10
MAINTENANCE FUNDAMENTALS: SHELF / SHELF REMOVAL / MINI-LED LIGHT FIXTURES
1. Adjustable Shelf
 Adjustment of the angle of the shelves can be
made by pivoting the lower portion of the shelf
bracket in the upright.
 The shelves can be adjusted to an angle of:
0, 5, and 10 degrees.
 See illustration at right.
2. Shelf Assembly Removal
 Shelves can be removed for cleaning or
adjustments
 For lighted shelving, turn off power, unplug the
light cord.
 Lift shelf straight up to separate from brackets.
 Remove brackets. Note it may be necessary to
remove the nylon shipping bracket retainer.
Pliers will be required to accomplish this task.
3. Mini-LED Light Fixture Removal (See
Illustration Below)
Removal of lamp:
 This case is provided with LED lights which will
rarely require change-out.
 Contact Structural Concepts’ Technical Service
Department for replacement parts (see the
Technical Service section of this operating
manual).
Replacement of lamp:
 To replace LED Light Fixture, simply
disconnect the existing LED light from its
brackets. Replace.
 See illustrations at right.
 Note: LED Light and pug must be connected in
a specific manner or they will not work. Make
certain that oval edge of plug connects to oval
edge of LED light.
> See next page for specifics regarding fluorescent
T-8 style lights.
Adjustment
Notches
Mini-LED Light Fixture
Plug’s
Oval
Form
Mini-LED’s
Oval Form
Bracket Retainer
(One For Each
Bracket)
LED Light
Fixtures
LED Light
Switch

11
MAINTENANCE FUNDAMENTALS: T-8 LIGHT FIXTURES / KEY (FRONT ACCESS)
1. T-8 Fluorescent Light Fixtures
Removal of lamps:
 Grasp lamp firmly and carefully pull downward
and out from socket.
 See photos at right.
Installation of lamp:
 Align pins with slot.
 Insert pins into socket and push upward into
place.
 See photos at right.
> See next page for specifics regarding LED lights.
2. Key (Front Access)
 Front access to case is available.
 A key controls front glass area of case.
 When the key is turned, the front glass can be
lowered for cleaning and/or maintenance.
 Be sure to store key in a safe, secure place.
T-8 Fluorescent
Lamps
Key Thermometer
Standard
Fluorescent
Light Fixtures

12
MAINTENANCE FUNDAMENTALS: REMOVING REAR DOORS / HINGED DOOR
> Warning! Disconnect power before providing
maintenance and service to unit.
> Assembly or disassembly and servicing to be
accomplished by licensed electrical contractor.
1. Removing Rear Sliding Doors
 Note: Doors are not interchangeable.
 There is an outer and inner door. The outer door
is the right hand door (from case rear).
 It can be identified by a stop located at the lower
right hand corner to the inside of the case.
 Inner door is left-hand door (from case rear).
2. Hinged Door
 Your model may have a hinged door.
 Simply grasp handle and open.
 Be sure to close to maintain proper case temps.
 Note: Ballast box / driver box is assembled with
Phillips® screws. To disassemble, simply use
same screwdriver to remove screws.
Ballast Box /
LED Driver Box
Inner Door Outer Door Hinged Door

13
MAINTENANCE FUNDAMENTALS: EVAPORATOR COIL FANS ACCESS AND REMOVAL
Warning! Disconnect power before providing
maintenance and service to unit. Assembly or
disassembly and servicing to be accomplished
by licensed electrical contractor.
Fan and Fan
Housing
Fan Shroud
Coils
Fan Shroud
Coil
DrainFan & Housing (2-Fan Model Shown For
Illustrative Purposes)
Evaporator Coil Fans Access and Removal
 Fans may be accessed by removing Deck
(covering Fan Shroud, Fan Housing and Coil).
See illustrations at right.

14
REFRIGERATION FUNDAMENTALS: ACCESS TO CONDENSER COIL / SERVICING / MODULE
in 110V receptacle inside base, and positioned
under PVC drain and on base frame.
 When pulling or pushing unit in or out under the
case, use caution to avoid damage to copper
refrigeration lines, hoses and cable.
 Insure that the flexible drain hose is fully inserted
into the slot of hose support for proper drainage.
See illustration on next page for general location
and specifics.
3. Temperature Control Module
 Temperature Control Module is located in the
Electrical J-Box.
 Temperature is controlled by Temperature
Control Module. It is located at lower-right area
(from the rear) of the Drop-In Refrigerated
Section. See top-right illustration for general
location.
 If a temperature setting change is required, refer
to instructions in the temperature controller
section of this operating manual.
Refrigeration Access, Connections & Servicing
1. Access to Condenser Coil for Cleaning
 No tools required!
 Access to Refrigeration Unit (for cleaning
condenser coil) is possible without tools.
 Remove the (2) Thumb Screws on Rear Grille.
 Flip down Rear Grille. Lift grille up and out (with
Tabs clearing the Base Frame Angle).
 Be careful NOT to misplace Thumb Screws!
 Cleaning of Condenser Coil can be done without
sliding out Refrigeration Unit.
 See Cleaning Schedule for cleaning guidelines.
 Replace Rear Grille in reverse order it was
removed (with Tabs behind Base Frame Angle).
 See illustration at right.
2. Assembly or Disassembly and Servicing to be
Accomplished by Licensed Refrigeration
Contractor
 Refrigeration Unit slides directly out from lower
section to allow for servicing.
 Service connections are located in the
Refrigeration Unit Slide-Out (shown at right).
 Condensate Pan is provided for case
condensation. Condensate pan is to be plugged
See Next Several
Pages In Manual for
Condenser Package
Illustrated Breakdown
Slide Out
For Servicing
Thumb Screws
Location (Both
Sides)
Rear Grille
Magnetic Air Filter Temperature
Control
Module

15
CONDENSATE PACKAGE EXPLODED PICTORIAL (APPLICABLE TO MODEL DGS48XXR)
The following images show the various parts pertaining to the refrigeration
unit (that is slid directly out from lower section) to be serviced.
Copper
Tubing
Refrigeration
Package Pan
Sight Glass
Condensing Coil (and
Internal Fan and Motor)
Pump
Dryer Filter
Flexible Hose
Connections
Hot Gas
Condensate Pan
and Coils
Receiver
Overflow Pan With
Electrical Coil

16
REFRIGERATION SLIDE-OUT EXPLODED PICTORIAL
The following images show the various parts pertaining to condensate
package (slid directly out from lower section) to be serviced.
Copper
Tubing
Condensate
Package Pan
Sight Glass
Condensing Coil (and
Internal Fan and Motor)
Compressor
Filter Dryer
Flexible Hose
Connections
Receiver
CONDENSATE PACKAGE EXPLODED PICTORIAL (APPLICABLE TO DGS24XXR & DGS36XXR)
Evaporator Pan
[and Hot Gas Loop]

17
SERIAL LABEL LOCATION & INFORMATION LISTED / TECH INFO & SERVICE
Serial Label Location & Information Listed / Technical Information & Service
 Serial labels are located near the electrical access on your case.
 Serial labels contain electrical, temperature & refrigeration information, as well as regulatory
standards to which the case conforms.
 For additional technical information and service, see the TECHNICAL SERVICE page in this
manual for instructions on contacting Structural Concepts’ Technical Service Department.
 See images below for samples of both refrigerated and non-refrigerated serial labels.
----- Sample Serial Label For Refrigerated Case -----
----- Sample Serial Label For Non-Refrigerated Case -----
SAMPLE ONLY
SAMPLEONLY
SAMPLE ONLY
SAMPLE ONLY
SAMPLE ONLY
SAMPLE ONLY

18
CONDITION TROUBLESHOOTING
Case Not Lining
Up See Installation Section for instructions on properly aligning case (alongside other
cases) and adjusting levelers.
Water Is On The
Floor Caution! Water on flooring can cause much damage! Until cause is determined (and
repaired), follow these procedures:
 Use wet-dry vacuum (or mop & bucket) to remove standing water.
 Use ‘catch pans’ for water to drain into. Swap out regularly until case has
completely drained.
Note: See Drain, Hose and Bracket Placement Illustrations sheet in this manual for
views of different evaporator systems used in display cases.
Check that the drain trap is free of debris.
Check that the drain hose is correctly positioned over Condensate pan (or floor drain,
for remote units).
Check store conditions. To prevent condensation in Type 1 environments, maximum
conditions are to be 55% humidity / 75° Fahrenheit. For Type 2, maximum conditions
are to be 60% humidity / 80° Fahrenheit. See serial label (at case rear near main
power switch) for NSF® Type of your case.
Check Condensate pan float for proper operation (Heat Rod Condensate System
only).
Check that overflow condensate pan is properly plugged in or connected.
Caution! Condensate pan may be malfunctioning (Electrical Heat Rod Evaporator
system). If so, water will overflow pan and seep onto flooring causing damage! Until
Condensate pan is functioning (or is replaced), follow these procedures:
 Use wet-dry vacuum (or mop & bucket) to remove standing water.
 Use ‘catch pans’ for water to drain into. Swap out regularly until case has
completely drained.
Caution! Disruption of power can cause water to overflow pan and seep onto
flooring causing damage! Check that power to case is constant. Until power is
restored, follow these procedures:
 Use wet-dry vacuum (or mop & bucket) to remove standing water.
 Use ‘catch pans’ for water to drainage. Swap out regularly until evaporation of
case is complete (or until power is restored).
 When power to case is restored, Condensate pan should function properly and
water will no longer overflow onto flooring.
Caution! Wicking material (if any on your particular hot gas loop system) may be dirty
or worn and need replacement (Hot Gas Condensate system only).
 Slide refrigeration system out from under unit.
 After refrigeration system has been carefully 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 operating manual.
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) - PAGE 1 of 3

19
CONDITION TROUBLESHOOTING
Fan Emits Excessive
Noise Check that the case is aligned, level and plumb.
Check evaporator fan for cleanliness.
Unplug/power off fan motors. Check motor shaft for bearing wear.
Check that fan motors are securely mounted in brackets.
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.
Fans Are Not Working Check that the MAIN power switch is on.
Check that fans are plugged in at the fan shroud.
Check for foreign material obstructing fan performance.
Check that fan blades freely rotate within fan shrouds
Check that power is going to fans
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) - PAGE 2 of 3

20
CONDITION TROUBLESHOOTING
Control Display Is
Flashing See your case’s serial label for your model’s specified settings. See SERIAL
LABEL LOCATION & INFORMATION LISTED / TECH INFO & SERVICE for label
location, etc.
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
will indicate defrost cycle in progress.
Check that case is not in sun or near a heat or air-conditioning vent. See
OVERVIEW AND WARNINGS section in manual for adverse conditions/spacing
issue parameters.
If case is located near front doors, temperature fluctuation can hinder unit’s ability
to maintain temperature. See OVERVIEW AND WARNINGS section in manual for
adverse conditions/spacing issue parameters.
Check that condenser coil has been cleaned.
Check air return 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.
Case Lights Are Not
Working Check that light switch is in the on position.
Check that ALL of the light cords and plugs are properly connected. See
MAINTENANCE - LIGHT FIXTURES (LED LIGHT FIXTURES) section.
Service Technicians Only: Check voltage at LED drivers. If voltage is entering but
not exiting, LED driver may be faulty.
Check that condenser coil air filter (attached to rear grille) has been cleaned. See
GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL) section
in operating manual for instructions.
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) - PAGE 3 of 3