Structural Concepts HARMONY HMO2653R User manual

PN 54171
33” DEEP SELF-SERVICE REFRIGERATED BAKERY MERCHANDISER
READ AND SAVE THESE INSTRUCTIONS
Rev S Date: 9.30.2019
I:\Oper Manuals - PUB\Harmony\HMOXX53R_5194_5194R_5163_5749_54171.pub
INSTALLATION AND
OPERATING MANUAL
>>> Model HMO2653R (26 7/8”L* x 34 3/4”D x 52 3/4”H**)
>>> Model HMO2653R.5194 (26 7/8”L* x 34 3/4”D x 52 3/4”H**)
>>> Model HMO3953R (38 7/8”L* x 32 1/8”D x 52 3/4”H**)
>>> Model HMO3953R.5749 (38 7/8”L* x 32 1/8”D x 58 3/8”H**)
>>> Model HMO5153R (50 7/8”L* x 32 1/8”D x 52 3/4”H**)
>>> Model HMO5153R.5163 (50 7/8”L* x 32 1/8”D x 41 3/4”H**)
>>> Model HMO6353R (62 11/16”L* x 32 1/8”D x 52 5/8”H**)
>>> Model HMO7553R (75 1/4”L* x 32 1/8”D x 52 5/8”H**)
>>> Model HMO9653R.5914E (99 1/2”L* x 34 1/8”D x 52 5/8”H**)
*Includes 1” End Panels
**Includes Levelers at 1 1/4” Below Base Frame
888 E. Porter Road ∙ Muskegon, MI 49441 Phone: [phone] Fax: [phone] www.structuralconcepts.com
HMO2653R
HMO5153R
HMO2653R.5194
HMO5153R.5163
(Shown With Risers)
HMO7553R
HMO3953R.5749
HMO9653R.5914E
(Shown With Optional Recipe
Card Holders)

2
TABLE OF CONTENTS
SHIPMENT CONDITION / DAMAGE DISCOVERED AT DELIVERY or UNCRATING / SHORTAGES
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS .…………..
CASE REMOVAL FROM SKID (LEVELERS OR CASTERS) ……………………………………………..
INSTALLATION - CAULKING AND BOLTING UNITS TOGETHER ……………………………………...
INSTALLATION, CONT’D - MODEL HMO3953R.5749 ONLY: LINE-UP WITH MODEL DP812R.5748
INSTALLATION, CONT’D - MODEL HMO3953R.5749 ONLY: GENERAL LAYOUT ……………..
INSTALLATION, CONT’D - MODEL HMO3953R.5749 ONLY: DRAIN & CONDENSATE PACKAGE ..
INSTALLATION, CONT’D - CONNECTIONS/CONTROLLER/LOCK/MAIN POWER SWITCH ………..
INSTALLATION, CONT’D - ELECTRICAL CONNECTIONS / EVAPORATOR FAN AREA …………….
DRAIN, HOSE AND BRACKET PLACEMENT ILLUSTRATIONS …………………………………….…...
POSITIONING & ALIGNING CASE / ADJUSTING LEVELERS / FRAME SUPPORT RAILS .………...
ADJUSTING TOE-KICK / REMOVING FRONT GRILLE …………………………………………………...
REAR FILTER / GRILLE / PANEL ACCESS / COMPRESSOR PAN SHIPMENT SCREWS ..………...
START-UP AND OPERATION ..….…………...…...…..………………………...………….……..…………
START-UP AND OPERATION, CONTINUED: NIGHT AIR CURTAIN OPERATING INSTRUCTIONS
SOLID REAR DOOR (MODEL HMO2653R.5194) ...………………………………………………………..
REAR DOOR WITH PERFORATED PLEXIGLAS® PLENUM (MODEL HMO2653R) ..………………...
REAR SLIDING DOOR W/ADJOINED PERFORATED PLEXI® PLENUM (MODEL HMO3953R) ...….
SECURITY GRID INFORMATION …………………………………………………………………………....
NIGHT AIR CURTAIN (OPTIONAL) OPERATING INSTRUCTIONS ……………………………………..
MAINTENANCE FUNDAMENTALS - SHELF ASSEMBLY REMOVAL / FLUORESCENT LIGHTS …..
MAINTENANCE FUNDAMENTALS, CONTINUED - LED LIGHT FIXTURES ………………….………..
MAINTENANCE: REFRIGERATION PACKAGE ILLUSTRATION (MODEL HMO2653R.5194) …........
GENERAL CLEANING (TO BE PERFORMED BY STORE PERSONNEL) …………………...……...….
CLEANING SCHEDULE - STAINLESS STEEL (TO BE PERFORMED BY STORE PERSONNEL) ….
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) …….....
GENERAL CLEANING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) …….....
TROUBLESHOOTING (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY) ……….
TROUBLESHOOTING - CONDENSING SYSTEM (TO BE PERFORMED BY TRAINED SERVICE
PROVIDERS ONLY) ……………………………………………………………………………….…..
TROUBLESHOOTING - EVAPORATOR SYSTEM (TO BE PERFORMED BY TRAINED SERVICE
PROVIDERS ONLY) …….………………………………………………………………………….....
PREVENTIVE MAINTENANCE (TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY)
PREVENTIVE MAINTENANCE OF HONEYCOMB AIR DIFFUSERS (TO BE PERFORMED BY
TRAINED SERVICE PROVIDERS ONLY) …...……………………………………………………..
SERIAL LABEL INFORMATION & LOCATION …..……………………………………………………...….
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
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22-23
24
25
26
27
28
29
30
31
32-34
35
36
37
38
39
40
41
42
43

3
SHIPMENT CONDITION / DAMAGE DISCOVERED DURING DELIVERY or UNCRATING / SHORTAGES
1. Shipment Condition
 Before and during unloading, check all equipment for damage.
2. Damage Discovered During Delivery
 3rd Party Carrier: Describe damage on freight bill and obtain signature of
driver. Carrier will supply necessary claim forms. If these steps are not
taken, carrier may refuse your claim.
 Prepaid and Add: Contact carrier (and follow same procedure as with
3rd party carrier). Also contact Structural Concepts at 1-800-433-9489.
3. Risk of Damage When Case is NOT Uncrated at Installation Site
 Uncrating equipment at a facility OTHER THAN the installation site may
result in SEVERE DAMAGE to unit when transporting to final
destination.
 Structural Concepts strongly recommends that equipment ONLY be
uncrated at installation site.
4. Damage Discovered After Uncrating
 3rd Party Carrier: Contact carrier within 10 days of delivery for their
procedures; retain all packaging. If these steps are not taken, carrier
may refuse your claim.
 Prepaid and Add: Contact carrier (and follow same procedure as with
3rd party carrier). Also contact Structural Concepts at 1-800-433-9489
within 10 days of delivery.
5. Shortages
 If a shortage exists (and it is the responsibility of Structural Concepts)
call 1-800-433-9489. Structural Concepts will acknowledge shortages
within 10 days from receipt of equipment.
 If a shortage involves the carrier, notify carrier immediately and request
an inspection.

4
OVERVIEW
 These Structural Concepts Harmony® self-service
cases are designed to merchandise packaged
products at 41 °F (5 °C) or less product temperatures
(unless custom cases with wire rack shelving).
 Cases should be installed and operated according to
this operating manual’s instructions to ensure proper
performance.
 Improper use will void warranty.
TYPE 1 vs. TYPE 2 CONDITIONS
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
55% maximum humidity and maximum temperatures
of 80 °F (27 °C).
 If unsure if unit is designed for Type 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!
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
Electric coil condensate pans are 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
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.

5
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING / PLUGS - PAGE 2 of 2
CAUTION! GFCI BREAKER USE RECOMMENDATION
If N.E.C. (National Electric Code) or your local code
requires GFCI (Ground Fault Circuit Interrupter) protection,
the use of a GFCI breaker is strongly recommended.
CAUTION! ADVERSE CONDITIONS / SPACING ISSUES
 Performance issues caused by adverse conditions are NOT warranted.
 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.).
 Keep at least 8-inch clearance above unit for air discharge (S.C. units).
CAUTION
CAUTION! LAMP REPLACEMENT GUIDELINES
LED lamps reflect specific size, shape and overall design. Replacements
must meet factory specifications. Fluorescent lamps are 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,
CONDITION 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.
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! CHECK CONDENSATE PAN POSITION & 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 pan plug MUST BE securely plugged into
receptacle.
 Check that overflow pan is fully functional.
 If wicking material is used, check that it is secure.
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.

6
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 model or options).

7
INSTALLATION - CAULKING AND BOLTING UNITS TOGETHER
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.
 See illustration at right.
2. Ventilation and Clearance
 Self-Contained refrigerated cases must
maintain airflow clearance of 6” (minimum) to
12” (recommended) at front and rear.
 Restriction of air can void warranty.
 Illustration at top-right may not reflect every
feature or option of your particular case.
3. Caulking and Bolting Units Together
Follow these steps to assure a secure, level lineup.
A. Begin all lineups leveling from highest point of
floor.
B. After the ’first’ case is level, apply industrial
grade butyl caulk on non-visible areas (at case
end). Use industrial grade silicone sealant on
visible areas (at case end).
C. Form Two (2) Caulk/Sealant Lines: (Sanitation
and Refrigeration). See illustration at
below-right for outline of caulk/sealant lines.
D. Line up ‘second’ case bolt-hole to bolt-hole to
‘first’ case.
E. Using SCC-supplied bolts (found in installation
packet), insert bolts in bolt hole locations (shown
at right). You may need to remove decking to
access lower bolt holes.
F. Caution! Front of cases MUST be flush with
each other! Also, after leveling, all cases to be
at same height.
G. Using SCC-supplied nuts & bolts, lightly tighten
each of the 5 to 8 bolts in a cross-wise pattern.
Work your way around the pattern, tightening
more firmly at each pass. Do not firmly tighten
one bolt and then start on the next!
H. After the cases are bolted together, level the
‘second’ case. Repeat this process for each
case to be adjoined.
I. After all lined-up cases are level, seal all seams
with industrial grade silicone sealant.
Approximate hole
locations pointed
at with arrows
( ) below
Sanitation Bead
Refrigeration Bead
Deck Sanitation
Bead
Refrigeration
Bead
A
B
C
Check air grilles for obstructions.
Maintain airflow clearance of 6” (min.)
to 12” (recommended) at front & rear.

8
INSTALLATION, CONTINUED - MODEL HMO3953R.5749 ONLY: LINE-UP WITH MODEL DP812R.5748
4. Line-Up With Model DP812R.5748
 Illustration below shows adjoinment of model
HMO3953R.5749 with separate model
DP812R.5748.
 Model DP812R.5748 has its own operating
manual, SCC P/N 20-32217.
End Cap Model
HMO3953R.5749
(See SCC P/N 54171
For Operating Manual)
Model DP812R.5748
 Note: Depending upon features and options
chosen, illustration below may not reflect every
aspect of your particular models.

9
INSTALLATION, CONTINUED - MODEL HMO3953R.5749 ONLY: GENERAL LAYOUT
5. Model HMO3953R.5749 General Layout
 Illustration below shows the general layout of
model HMO3953R.5749.
 Case wiring source is from its adjoining case
(SCC P/N DP812R.5748).
View of Electrical Box, LED
Drivers, Contactor, Terminal
Block, Temperature Controller,
Main Power Switch, Etc.
Temperature
Controller and Main
Power Switch
Thermometer Metal Surface
Shelving
6. Position & Align Case Alongside Other Cases
 Before adjusting levelers (or shimming frame
support rails), make certain that the case is in
proper position and, if required, aligned with
adjoining case(s).
 This may require the repositioning of the case you
are installing or the already positioned case(s).
7. Frame Support Rails Must Be Shimmed
 Illustration below shows frame support rails.
 Shims will be provided with all cases that have
frame support rails.
 Use shims to level case.
 Note: After case is in position, it must be
sealed to floor to prevent entry or leakage of
liquid or moisture.
Frame Support
Rails
Frame Support
Rails

10
INSTALLATION, CONTINUED - MODEL HMO3953R.5749 ONLY: DRAIN AND CONDENSATE PACKAGE
8. Model HMO3953R.5749 Drain and
Condensate Package
 Illustration at right shows the location of
model HMO3953R.5749 drain.
 Drain from case must be routed to floor drain.
 Illustration below shows the general layout of
model HMO3953R.5749 condensate
package.
 Case wiring source is from its adjoining case
(SCC P/N DP812R.5748).
 Note: Depending upon features and options
chosen, illustration below may not reflect
every aspect of your particular models.
Refrigeration
U-Tubes
Filter Dryer
Electrical
Starter Unit
Condenser Coils
and Housing
Electrical Box (LED Drivers,
Contactor, Terminal Block,
Temperature Controller, Main
Power Switch, Etc.)
Compressor
Sight Glass
Condenser Coil Fan
& Fan Housing
Drain (From Evaporator Package)
To Be Routed To Floor Drain

11
INSTALLATION, CONTINUED - CONNECTIONS / CONTROLLER / LOCK / MAIN POWER SWITCH
9. Connections/Controller/Lock/Main Power
Switch (Self-Contained Units)
Controller/Ballast box location is at customer rear.
 See illustration at left.
 Below illustrations show layout of controller,
ballasts, main power switch, door lock, terminal
block, etc. after removal of controller/ballast box.
Rear Door
Lock
Controller
Main Power Switch
Location of
Cord and Plug
in Self-
Contained
Cases

12
INSTALLATION, CONTINUED - ELECTRICAL CONNECTIONS / EVAPORATOR FAN AREA
Case Rear
Field Wiring Electrical
Connections
Fan Shroud
Fan Blade
Drain
10. Electrical Connections (Certain Remote Cases)
Field wiring connection / electrical access location is at
customer-left side of case.
 Single phase leads are provided.
11. 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.

13
DRAIN, HOSE AND BRACKET PLACEMENT ILLUSTRATIONS NOTE: BELOW ILLUSTRATIONS MAY
NOT EXACTLY REFLECT EVERY
PARTICULAR CASE’S FEATURES
2. Hot Gas Evaporator System.
 Hot gas serpentine coil is routed through a condensate
reservoir allowing water to be heated. This system
uses a wicking material (partially submersed) with
warm condenser air passing through it for evaporation.
 Also incorporates an overflow reservoir with heating
element to ensure complete condensate removal.
Three Evaporator Systems Are Illustrated Below:
Illustration #1: Hot Gas “CopeVap” Evaporator
System. “Copevap” is built into Compressor Unit.
Illustration #2: Hot Gas Evaporator System.
Illustration 3A/3B : Electrical Heat Rod Evaporator
System. Note: Separate Evaporator Pan.
Warning! Regardless of Evaporator, the Hose and
Drain Trap MUST BE secured and positioned over
Evaporator Pan to prevent water seepage / spillage.
When sliding out Condenser Unit, be careful that
drain is not pulled from proper position.
1. Hot Gas “CopeVap” Evaporator System.
Clear PVC
Tube
Drain Trap
Hose thru bracket
Bracket
Note: Drain
positioned
directly over
Reservoir
“CopeVap”
Reservoir
Clamp
3B. Isometric View of
Electrical Heat Rod Evaporator System
Evaporator Pan
Evap. Pan Positioning Bracket
Use Hose Clamp
to Secure Hose
to Adapter
Clear PVC
Tube
Evap. Pan
Positioning
Bracket
Drain
Trap
Refrigeration
Assembly
Base
Compressor Pan
Shipment Screw
(1 at each side)
Wicking
Material
This area of your unit
may widely vary (due to
display case options).
Suction
Accumulator
Hot
Serpentine
Coil
Receiver
Elec. Box, Hot
Gas Condensate
Overflow
Scroll
Compressor
Fan
Shroud
Filter
Drier
Sight Glass
3A. Front View of
Electrical Heat Rod Evaporator System
Evaporator
Pan
Drain
Trap

14
POSITIONING & ALIGNING CASE / ADJUSTING LEVELERS / FRAME SUPPORT RAILS
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
 See illustrations and photos at right.
 Note: Depending upon options and features
chosen, illustrations may not exactly reflect your
particular case’s features.
 After case is in proper position, adjust case so it
is level and plumb (see illustrations 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 raise the case.
 Do not use Pry Bar on Toe-Kick as it may buck-
le.
 Do not use Pry Bar on End Panel; it may chip.
 Use Pry Bar ONLY on Base Frame to avoid
damaging case.
3. Frame Support Rails Must Be Shimmed
 Illustration below shows frame support rails.
 Shims will be provided with all cases that have
frame support rails.
 Use shims to level case.
 Note: After case is in position, it must be
sealed to floor to prevent entry or leakage of
liquid or moisture.
Base
Frame
Leveler
Toe-Kick
Block
Frame Support Rails

15
ADJUSTING TOE-KICK / REMOVING FRONT GRILLE
1. Adjusting Toe-Kick
Model HMO2653R
 See illustration at top-right.
 Loosen adjustment screws located on toe-kick.
 Adjust Front Toe-Kick up or down.
 Tighten Adjustment Screws.
2. Removing Front Grille
>> Grille Removal (With Screws)
 Remove front grille retainer screws (both hor-
izontal and vertical). See illustration at mid-
right.
 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.
 Tighten retainer screws.
>> Grille Removal (Without Screws)
 Front grille is held in place with retaining hooks.
 Simply lift front grille up and off case.
 No screws are required for this particular grille.
 See illustration at lower-right.
Front Grille Horizontal Retainer Screws
(One at Each End of Case)
(HMG7553R)
(HMG3953R) (HMG2653R)
Location of Front
Toe-Kick
Adjustment
Screws
Front Grille Vertical Retainer
Screws (Along Entire
Underside of Front Panel)
Front Grille Retaining
Hooks (At Each End
of Grille)

16
REAR FILTER / GRILLE / PANEL ACCESS AND REMOVAL / COMPRESSOR PAN SHIPMENT SCREWS
Enlarged View of Rear Grille Panel
(and Grille) Shown Above
Compressor Pan Shipment
Screw (One at Each End)
1. Magnetized Condenser Coil Filter (Optional)
 Removable magnetized condenser coil filter is
positioned on outside of rear grille.
 It is held in place with magnetic strips.
 It may be removed for cleaning or service.
2. Rear Grille
 Rear grille may be removed by lifting grille slots up
and off rear panel’s retainer hooks.
3. Rear Panel
 Rear panel is held in place with four Phillips™
(not flat-head) screws (which may be removed).
4. Compressor Pan Shipment Screws
 Note: At initial access to refrigeration package,
it may be necessary to remove compressor pan
shipment screws.
 Due to location, a Phillips™ (not flat-head) screw
with extension may be required.
 See illustration at lower-right.
 For specifics on refrigeration package and its
components, see next page.
Removable, Magnetized Condenser Coil
Filter (Optional). Note: Filter is to be
Placed on Outside of Rear Grille
Rear Grille
(Removable by Hooks)
Rear Panel
(Removable by Screws)
View of Case With Rear
Grille Removed
View of Case With Rear
Panel & Grille Attached
View of Case With Rear
Panel & Grille Removed
Rear
Panel Rear
Grille

1. Merchandiser Start-Up
 Remote Units: Case is hard-wired. When power is
supplied, case will power-up.
 Self-Contained: Main Power switch is located at
case rear, lower right. See illustration below.
 Self-Contained: Temperature Controller is located
at case rear, lower left. See the illustration shown
below.
 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.
17
START-UP AND OPERATION
Cap
Plug
Receptacle
Main Power Switch
Temperature
Controller

18
START-UP AND OPERATION, CONTINUED: NIGHT AIR CURTAIN OPERATING INSTRUCTIONS
Night Air Curtain
Handle (2) Night Air Curtain
Magnets (To Retract &
Attach to Lower Section).
One at Each End
Night Air Curtain
Handle
Underside View of
Detached Night Air Curtain
Side View of Attached
Night Air Curtain (With
End Panel Removed)
Night Air
Curtain Roller
and Housing
Night Air Curtain
Projected Arc From
Lower Section
Night Air Curtain
General Location for
Attaching Retaining
Magnets
2. Night Air Curtain Operating Instructions
1. Use caution when handling Night Air Curtain. See view of
detached Night Air Curtain at top-left.
2. Display case comes with Night Curtain already attached.
3. Attachment Magnets will hold Night Air Curtain firmly in place.
4. Grasp the handle at lower-front-center area of case (shown in
enlarged view at lower-left) and pull upward.
5. When extended, the Night Air Curtain magnets may be attached
to metal plate in front of honeycomb (as shown below).
6. Magnets (on extended night air curtain) will hold it firmly in place.
7. To return Night Air Curtain to its original position, grasp handle,
and lift up and off from its magnetic attachment and carefully
wind Night Air Curtain back into roll (into lower section of case).
8. 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.
9. Caution! Do not slide or drag Night Air Curtain across metal
plate (in front of honeycomb) when extending and attaching.
Lift end of curtain (and its magnets) straight up and off metal
housing to avoid scratching or marring surface.
(5) Magnets (To Hold
Night Air Curtain In
Place in Lower
Section of Case)

19
SOLID REAR DOOR - MODEL HMO2653R.5194 (SEE NEXT PAGE FOR PERFORATED PLEXIGLAS®)
1. Solid Rear Door
 Illustration below shows standard door for a
specific model. Your model may not reflect this
feature.
 See next page for case with rear door with
Rear Hinged Door
With Handle
access to perforated Plexiglas® plenum
(designed to assist in air flow issues).
 Caution: Door is designed to open at a specif-
ic arc. Do not attempt to open door beyond this
arc or you could damage hinges or door!

20
REAR DOOR WITH PERFORATED PLEXIGLAS PLENUM - MODEL HMO2653R
2. Perforated Plexiglas® Plenum
 The perforated Plexiglas® plenum is designed to
assist the case in proper air flow.
 The Plexiglas® plenum may be removed (for
cleaning, etc.) by opening the rear door and
sliding up and out of frame.
Perforated Plexi Plenum
 Caution: See cleaning instructions in this
manual for specifics on cleaning the Plexiglas®
plenum
 See illustration below.
 Caution: After cleaning, carefully replace
perforated Plexiglas® plenum back into frame.
Avoid scraping or marring the surface.