Structural Concepts Harmony HMO7536R User manual

PN 54190
SELF-SERVICE REFRIGERATED BAKERY MERCHANDISER
READ AND SAVE THESE INSTRUCTIONS
Rev O Date: 10.27.2016I:\Oper Manuals - PUB\Harmony\HMO(L)36R_4716_4716A_5936_54190.pub
INSTALLATION AND
OPERATING MANUAL
Models To Which This Manual Is Applicable*
HMO3936R, HMO3936R.7121, HMO4836R.5936 / HMO5136R.4716,
HMO5136R.7121, HMO7236R.4716A and HMO7536R
* Note: This Manual May Also Be Applicable To Models Not Listed Herein.
888 E. Porter Road · Muskegon, MI 49441 Phone: [phone] Fax: [phone] www.structuralconcepts.com
HMO7536R
HMO3936R
HMO7536R (Shown With
Optional Security Grid)
HMO5136R.4716 (With Steps)
HMO4836R.5936 (With Ambient
Upper Glass Enclosure) /
Product Shown For Illustrative
Purposes Only HMO5136R.7121 (Similar To
HMO3936R.7121) With Ambient
Upper Glass Enclosure & Acrylic Bins

2
TABLE OF CONTENTS
OVERVIEW AND WARNINGS ……..………………..…….………………………..…………………....…..
CASE REMOVAL FROM SKID (LEVELERS OR CASTERS) ……………………………………………...
INSTALLATION …………………………………………………………………..……...………………..…….
POSITIONING, ALIGNING, LEVELING UNIT, REMOVING FRONT GRILLE …..……………………….
START-UP AND OPERATION ……...….…………...…...…..………………………...………….……..……
MAINTENANCE FUNDAMENTALS - SHELF ASSEMBLY / LIGHT FIXTURES ..…………………..…...
MAINTENANCE FUNDAMENTALS - STEP ASS’Y / LED LIGHT FIXTURE & POWER SUPPLY
ACCESS …………....……………………………………………………………………………...…….
MAINTENANCE FUNDAMENTALS - REAR SLIDING GLASS DOORS / MAGNETIC CONDENSER
COIL FILTER……….…………………………………………………………………………………….
MAINTENANCE FUNDAMENTALS - UPPER SECTION WITH ACRYLIC BINS ………………..………
MAINTENANCE FUNDAMENTALS - HONEYCOMB AIR DIFFUSER …...……………………………….
OPTIONAL NIGHT AIR CURTAIN OPERATING INSTRUCTIONS ……...…………………..…………...
STANDARD NIGHT AIR CURTAIN LOCATION FOR MODEL HMO5136R.4716 ………….…………...
SECURITY GRID OPERATING INSTRUCTIONS (OPTIONAL) ………….………………..……………...
SERIAL LABEL INFORMATION & LOCATION …..………………………………………………………….
CLEANING SCHEDULE (TO BE PERFORMED BY STORE PERSONNEL) …………………….……...
PREVENTIVE MAINTENANCE (TO BE PERFORMED BY TRAINED SERVICE PROVIDER) ………..
TROUBLESHOOTING: GENERAL OVERVIEW .…………..……………………………………….……….
TROUBLESHOOTING: CONDENSING SYSTEM (BY TRAINED SERVICE PROVIDERS ONLY) …...
TROUBLESHOOTING: EVAPORATOR SYSTEM (BY TRAINED SERVICE PROVIDERS ONLY) …...
TROUBLESHOOTING: CONDENSER PACKAGE OVERVIEW ………………..……..…….…………….
TROUBLESHOOTING: COMPRESSOR NOT ON / NO DISPLAY ON CONTROLLER ……..…...…….
TROUBLESHOOTING: LIGHTS NOT OPERATING ………………..…………...………………………....
CAREL® CONTROLLER - PROGRAMMING THE INSTRUMENT ……....……………………………….
CAREL® CONTROLLER - USER INTERFACE, SUMMARY TABLES OF ALARMS & SIGNALS …….
CAREL® CONTROLLER - Summary Table of Operating Parameters (After Programming Key) ……...
TECHNICAL SERVICE CONTACT INFORMATION & WARRANTY INFORMATION ……...…….….....
3-4
5
6-10
11
12
13
14
15
16
17
18
19
20-21
22
23-24
25
26
27
28
29
30
31
32
33
34
35

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.
 Temperature on control display will read below
freezing. This is normal and does not reflect your
product temperature.
 Units are set up to defrost every 4 hours. It is normal
to see brief temperature spikes into the 50 °F range at
this time. Product will remain cold during the short
time it takes for the unit to defrost.
 Evaporator fans run constantly as a part of the defrost
process.
 A/C adjustments at night will cause condensation
issues on refrigerated display units.
 Cases should be installed and operated according to
this operating manual’s instructions to insure proper
performance. Improper use will void warranty.
CASE 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 (these cases) ambient
conditions are to be at 55% maximum humidity and
maximum temperatures of 75 °F (24 °C).
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 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.
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
Condenser Pan is Hot!
Disconnect and allow to cool
before cleaning or removing from case.
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 / PLUGS - PAGE 1 of 2
ATTENTION
CONTRACTORS

4
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS - PAGE 2 of 2
CAUTION! ADVERSE CONDITIONS / SPACING ISSUES
 Performance issues caused by adverse conditions are NOT warranted.
 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 increase noise level. Whisper
Cool compressor blankets or remote units 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.
CAUTION
PRECAUTIONS
 This sheet contains 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.
 Wiring diagram placement may vary; it may be placed
near ballast box, field wiring box, raceway cover, or
other related location.
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! CHECK BOTH CONDENSER PAN AND OVERFLOW PAN
Water on flooring can cause extensive damage!
Before powering up unit, check the following:
 Condenser pan MUST BE positioned directly under condensate drain.
 Electric coil overflow pan MUST HAVE single plug connected to its box.
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

5
CASE REMOVAL FROM SKID (LEVELERS OR CASTERS)
Various Types Of
Case Shipping
Brackets
1. Removing Case Shipping Brackets That Are Attached To Skid
 Remove screws holding Case Shipping Brackets to skid.
 Remove Case Shipping Brackets from Skid.
 See illustrations below. Note: Shipping Brackets will vary in size, shape, material and location
depending upon case type and model.
3. Remove Case (With Casters) From Skid
A. Place ramp up against skid (to allow case to
smoothly slide off from skid).
B. Maintain support of case at all times or center of
gravity may cause case to fall.
C. Unlock Casters. Slide unit to rear of skid. Slide
down ramp and off from skid.
 Note:Illustrations reflect general outline of
sample case and may not reflect your particular
model or options).
Support
case
while
sliding
down
ramp.
Ramp
Carefully
Slide Skid
Out From
Under Case
Support
case while
removing
from skid.
2. Remove Case (With Levelers) From Skid
 To prevent damage, support case while sliding it
toward edge of skid.
 When case is at edge of skid, carefully lower to
floor (so two levelers rest on floor).
 Carefully slide skid out from under case.
 After removal of case from skid, place into
position.
 Note:Illustration below reflects general outline of
sample case and does not reflect any particular

6
INSTALLATION
B
C
Installation
Note: Units shown may not depict an exact
representation of your particular unit being
installed.
1. Position and Level Units
Position Units. Align multiple units carefully in
areas A, B, and C.
2
3
2. Bolting Units Together
Bolt units together at holes indicated at right.
Note: View at right has shelving removed for
illustrative purposes only. Bolt holes to be at
7 locations (shown at right).
 Note: Use 1/4-20 X .75 bolt at hole
location holes 2, 5 and 6 ONLY.
 Use 1/4-20 x 2.25” bolts for locations 1, 3,
4.
 Remove decks to access bolt holes 3, 4.
 Note 1: Both Casters and Levelers Option
shown in illustration at right.
 Note 2: Illustration at right may not reflect
every feature or option of your particular
case.
1
4
6 5
A

7
INSTALLATION, CONTINUED
3. Electrical Connections (Remote Cases)
Field wiring connection / electrical access location
is at customer-left side of case.
 Single phase leads are provided.
 Connection
4. Connections/Controller/Main Power Switch
(Self-Contained Units)
Controller/Ballast box is at customer rear.
 See illustrations below.
 Below illustrations show layout of controller,
ballasts, main power switch, terminal block, etc.
after removal of controller/ballast box cover.
HMO7536R Underside View With
Controller/Ballast Box Cover Intact
HMO7536R Underside With
Controller/Ballast Box Cover Removed
Controller Main Power
Switch
Ballasts

8
INSTALLATION, CONTINUED
5. Electrical Connections (Certain Remote Cases)
Field wiring connection / electrical access location is at
customer-left side of case.
 Single phase leads are provided.
6. Evaporator Fan Area
 Illustration below shows front of case with decking
removed.
 See Preventive Maintenance section in this manual
for guidelines on cleaning this area.
Case Rear
Field Wiring Electrical
Connections
Fan Shroud
Fan Blade
Drain

9
INSTALLATION, CONTINUED
7. Honeycomb Air Diffuser
 Honeycomb is located in discharge air duct.
 From inside lower refrigerated area, locate the
two most forward screws which secure the lower
light & discharge panel.
Honeycomb
Retainer
Honeycomb
 Remove the two most forward screws; panel
must hang down supported by the rear screws.
Do not force panel lower.
 See MAINTENANCE FUNDAMENTALS -
HONEYCOMB AIR DIFFUSER section in this
manual for complete instructions on removal
and installation of honeycomb.

10
INSTALLATION, CONTINUED
8. Risers (aka “Step Assemblies”)
 Risers allow product to be more prominently displayed.
 Risers are to rest on decks and be placed as far back as possible in case (as shown below).
 See CLEANING SCHEDULE (TO BE PERFORMED BY STORE PERSONNEL) in manual for
cleaning instructions.
--- Model HMO3936R Shown Partially Disassembled Above. Your Model May Differ ---

11
POSITIONING, ALIGNING, LEVELING UNIT, REMOVING FRONT GRILLE
Pry Bar Base
Frame
Leveler
Adjustable
Wrench
1. Position & Align Case Alongside Other Cases
 Before adjusting levelers, make certain that the
case is in proper position and, if required,
aligned with adjoining case.
 This may require the repositioning of the case
you are installing or the already positioned case.
2. Adjust Levelers
 After case is in proper position, adjust case so it
is level and plumb (see illustration at right).
 You may need to remove front and/or rear
Toe-Kick to access levelers.
 Use adjustable wrench to adjust leveler.
 Depending upon case weight it may be necessary
to use a Pry Bar to accomplish this task.
 Do not use Pry Bar on Toe-Kick as 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.
 See illustration and photos at right.
Note: Depending upon options and features
chosen, illustrations may not exactly reflect your
particular case’s features.
3. Removing Front Grille (If Necessary)
 Remove screws located at underside of front
panel to access drain or refrigeration lines.
 Front Grille will fall forward and can be lifted up
and away from case.
 Replace Front Grille in reverse order it was
removed from case.
 See illustration at lower right (may not exactly
reflect every feature or option of your case).
(3) Front Grille
Retainer Screws

Merchandiser Start-Up
 Remote Units: Case is hard-wired. When power is
supplied, case will power-up.
 Self-Contained: Main power switch and
temperature controller is located at case rear,
lower right. See illustrations below-left and right.
 Self-Contained: Depending upon model, switch
cover may be provided to protect controller and
switch. See illustration at lower-left.
 Turn on the lights. Whether Remote or
Self-Contained, light switch is located on inside of
case at top right, from case rear. See illustration at
top right.
 All lights should come on at 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.
 The lighting is wired in series so all lights must be
plugged in or receptacles capped for case lights
to turn on.
12
START-UP AND OPERATION
Cap
Plug
Receptacle
Main Power Switch
Temperature
Controller
Note: Certain Models May Have a Switch Cover.
If So, Simply Slide To The Left To Access Controls
Switch Cover

13
1. Shelf Assembly Removal
 Remove glass shelves
 For lighted shelving, unplug the light cord.
 Lift light shelf straight up to separate from
brackets.
 Remove rear shelf support
 Remove brackets. Note it may be necessary
to remove the nylon shipping bracket retainer.
Pliers will be required to accomplish this task.
2. Light Fixtures
Removal of lamp:
 Rotate lamp (1/4-turn) either direction to
disengage (upper or lower) pins/contacts from
lamp mounting sockets.
 Remove bulb by applying even pressure from
the back side at the bulb ends and pulling the
remaining contact from the sockets.
Installation of lamp:
 Align pins with slot.
 Insert pins into socket by rotating the bulb
1/4-turn to secure either the (upper or lower)
pinned contacts into the sockets.
 Rotate the remaining bulb contacts (1/4 turn)
into the remaining lamp-mounting socket
contacts.
 See illustration below.
MAINTENANCE FUNDAMENTALS - SHELF ASSEMBLY / LIGHT FIXTURES
Lamp Pins
Light Socket Light Fixture
Sample light fixture shown above. To remove
lamp, simply rotate lamp clockwise and out.
To replace, place one set of pins into slots and
rotate second set of pins into slots.
Shelf Bracket
Rear Shelf Support
Glass
Shelving
Light
Fixture
Shelf Bracket
Bracket
Retainers

14
MAINTENANCE FUNDAMENTALS, CONT’D - STEP ASS’Y / LED LIGHT FIXTURE & POWER SUPPLY
Replacement of lamp:
 To replace LED Light Fixture, disconnect the
existing LED light from its brackets and
self-adhesive tape. Replace.
 Note: LED Light and Plug must be connected in
a specific manner or they will not work. Oval
edge of plug must connect to oval edge of LED
light. See photos below-left.
5. LED Power Supply Access
 Disconnect electrical power from unit.
 LED driver is located in electrical box (in
same box temperature controller is located).
3. Step Assembly
 Step assembly is adjustable and is NOT held in
place by screws or bolts.
 Simply lift up and out.
 Caution! Remove carefully to avoid scratching or
marring inside of case.
 Return to case in same location it was removed.
 See Cleaning Schedule section in manual for
specifics on cleaning methods and frequency.
4. LED Light Fixture
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 Technical
Service section of this operating manual).
LED’s Oval Form
Plug’s Oval
Form
Removable
Step Assembly
Note: Model HMO5136R.4716 Shown Below
Your Model May Differ

15
MAINTENANCE FUNDAMENTALS, CONTINUED - REAR SLIDING GLASS DOORS / MAGNETIC FILTER
6. Rear Sliding Doors (Ambient Upper)
 Note: Illustration shown reflects model
HMO4836R.5936 only. Illustration is not
applicable to all models in this manual.
 Rear sliding doors may be removed from case
by moving rear doors toward center of case.
Individually lift each door upward (toward top of
case) and pivot bottom of door outward. Lower
door downward and away from case.
 Caution: Gently set doors down to avoid
marring, scraping, scratching or breakage.
 Return rear sliding doors to upper glass enclosure
in reverse order they were removed.
 See next page for upper glass enclosure with
acrylic bins.
7. Magnetic Condenser Coil Filter
 Magnetic condenser coil filter prevents dust and
debris from being ’pulled into’ condenser coil and
causing operational problems.
 See illustration below for general location.
 See CLEANING SCHEDULE (TO BE
PERFORMED BY STORE PERSONNEL) section
in manual for cleaning specifics.
Note: Model HMO4836R.5936 Shown Above
Your Model May Differ
Service Glass
Enclosure
Rear Sliding
Doors
Magnetic Condenser
Coil Filter

16
MAINTENANCE FUNDAMENTALS, CONTINUED - UPPER SECTION WITH ACRYLIC BINS
8. Upper Section With Acrylic Bins
 Note: Illustration shown reflects model
HMO5136R.7121 (and possibly other models).
 Illustration is not applicable to all models in this
manual.
 Acrylic bin doors may be raised and lowered by
accessing the knobs (as shown below).
 See CLEANING SCHEDULE (PERFORMED
BY STORE PERSONNEL) section in manual for
cleaning specifics.
9. Removable Acrylic Bin Door Assembly
 Acrylic bin door assembly is entirely removable
from upper section of case.
 Simply rotate keys (at upper left/right of assembly)
and lower the levers holding it intact. Lift assembly
up and off the pins that are holding lower acrylic bin
door assembly bracket to deck.
 See CLEANING SCHEDULE (TO BE
PERFORMED BY STORE PERSONNEL) section
in manual for cleaning specifics.
 Important! Store keys in safe but accessible
location for ready access.
Both Keys Must Be
Turned To Lower Levers
And Remove Acrylic Bin
Door Assembly

17
MAINTENANCE FUNDAMENTALS, CONTINUED - HONEYCOMB AIR DIFFUSER
10. Honeycomb Air Diffuser
Preventive maintenance should be performed
every 30 days unless conditions warrant a
more frequent replacement cycle.
Honeycomb Air Diffuser Removal
A. Wedge non-metallic device of suitable strength
(such as a ballpoint pen) between honeycomb and 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. Pry downward and away from 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’.
Honeycomb Air Diffuser Installation
D. Squeeze honeycomb 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.
A
B
C
D
E
F
Removable
Honeycomb

18
OPTIONAL NIGHT AIR CURTAIN INSTALLATION & OPERATING INSTRUCTIONS
NOTE: THE
BELOW
ILLUSTRATIO
N MAY NOT
EXACTLY
REFLECT
EVERY
PARTICULAR
CASE’S
FEATURES OR
OPTIONS.
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. To attach to display case, place night curtain on
top of case as shown. Mark “key slot” locations using night curtain as a template (you
may have to retract the curtain from housing to reveal “key slots”. Drill Ø11/32” holes
in top board 1/2” deep. Press “finserts” (shown below) into holes. Carefully tap in with
flat object to prevent top board damage. Attach Night Air Curtain with #10-32 screws.
3. Grasp handle and pull downward to desired location INSIDE acrylic air deflector.
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, retract curtain (to access key slots),
remove screws. Lift Night Air Curtain upward and away from case.
Night Air Curtain
Keyslots
Night Air Curtain
Retraction Magnets
Night Air Curtain
Retraction Magnets
Attachment Points
(Along Plate Outside
Acrylic Air Deflector
View of Night Air Curtain
(Underside / Detached)
Acrylic
Air Deflector
View of Night Air Curtain
(Topside / Attached)
Night Air Curtain
Retraction Magnets
“Finsert” (to
be inserted in
top board)
#10-32 screw
(to be
inserted
through Night
Air Curtain
Keyslots and
into “Finsert”)
NOTE: SEE NEXT PAGE FOR
MODEL HMO5136R.4716
NIGHT AIR CURTAIN LOCATION

19
STANDARD NIGHT AIR CURTAIN LOCATION FOR MODEL HMO5136R.4716
NOTE: BELOW ILLUSTRATION APPLIES
TO MODEL HMO5136R.4716 ONLY.
Night Air Curtain
Retraction Magnets Attachment
Points (Along Plate Outside
Acrylic Air Deflector)
Acrylic
Air Deflector
View of Night Air Curtain
(Topside / Attached)
Night Air Curtain
Retraction Handle

SECURITY GRID OPERATING INSTRUCTIONS (OPTIONAL) - PAGE #1 of 2
NOTE:
ILLUSTRATIONS
MAY NOT
EXACTLY
REFLECT EVERY
PARTICULAR
CASE’S
FEATURES
Initial Positioning and Installation of Security Grid
1. After hoisting the Security Grid directly over Air Return Cover, drop Security Grid
Positioning Rods into the Air Return Cover Holes (see enlarged view below).
2. After securely positioned in the Air Return Cover Holes, carefully and slowly lean
the Security Grid back against the Security Brackets.
3. The next page in this manual will show how to secure the top of the Security Grid
to the Security Brackets.
Air Return
Cover Hole
20
Enlarged View (Above)
 Enlarged View (above) shows Security Grid
Positioning Rod slid into Air Return Cover Hole.
 There are two Security Grid Positioning Rods along
each Security Grid.
 Security Grid Positioning Rods must be securely in
place prior to locking with Padlocks.
Security Grid
Positioning Rod