Structural Concepts HMBC2 Operator’s Manual

READ AND SAVE THESE INSTRUCTIONS

INST ALLATION AND

OPERATING MANUAL

34” DEEP COMBINATION CONVERTIBLE SERVICE ABOVE REFRIGERATED SELF-SERVICE CASE
PLEASE NOTE THE FOLLOWING:

1. YOUR SPECIFIC MODEL NUMBER IS ON THE SERIAL LABEL ON CASE REAR (NEAR MAIN
POWER SWITCH).

2. SEE “MODELS (AND THEIR RESPECTIVE CASE DIMENSIONS) LISTED IN THIS MANUAL”
SECTION FOR ADDITIONAL INFORMATION REGARDING SPECIFIC CASE DI MENSIONS OF
STANDARD MODELS AND

3. *[L] DENOTES DIFFERING CASE LENGTHS.

CDRs.

PN 54383

Note 1: HMBC2 and HMBC3 reflect an
undivided upper section.
Note 2

HMBC5 Case Shown Above

Structural Concepts Corporation · 888 E. Porter Road · Muskegon, MI 49441 Phone: [phone] Fax: [phone] · www.structuralconcepts.com

I:\Oper Manuals\Standard\Harmony_Combo_Conv_Svc_Abv_Rfg_Slf-Svc_Oper_Manual_54383.pub

divided upper section (as shown above).

: HMBC4, HMBC5, HMBC6 reflect a

Rev B Date: 4.11.2011

TABLE OF CONTENTS

TABLE OF CONTENTS ……………………………………………………………………………………...
MODELS LISTED IN MANUAL / DETERMINING THEIR RESPECTIVE CASE DIMENSIONS……..
OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS …………………...…..

INSTALLATION: REMOVAL FROM SKID [LEVELERS vs. CASTERS] ...……...…….……………….

INSTALLATION: LOWER FRONT GRILLE and LOWER REAR PANEL REMOVAL/REPLACEMENT.

INSTALLATION: ELECTRICAL CONNECTIONS …………………………………………………………
INSTALLATION: POSITIONING AND ALIGNING UNITS / GLASS SHELVING ……………………...
INSTALLATION: SETUP / POWER CORDS / TEMPERATURE CONTROLLER ……….…………...
INSTALLATION, CONTINUED: REMOTE UNIT ELECTRICAL LEADS / REFRI GATION & DRAIN

CONNECTIONS ……………………………………………………………………...…………… ………....

INSTALLATION: CASTERS / LEVELERS / CURVED GLASS / REAR DOORS ….………………......

INSTALLATION: DISPLAY CASE START-UP, LIGHTS, TEMPERATURE CONTROLLER, SST ….
INSTALLATION: FRONT GLASS ALIGNMENT & ADJUSTMENT ……………………………………..

BAFFLES: AMBIENT VS. REFRIGERATED CONDITIONS …………………………………………….
OPTIONAL NIGHT AIR CURTAIN INSTALLATION & OPERATING INSTRUCTIONS ……………...
SECURITY GRID INSTRUCTIONS (OPTIONAL) ………………………………………………………...
DRAIN, HOSE AND BRACKET PLACEMENT ILLUSTRATIONS …………..…………..……….……..

CLEANING SCHEDULE [TO BE PERFORMED BY STORE PERSONNEL] ……....…………...……..

TROUBLESHOOTING [TO BE PERFORMED BY STORE PERSONNEL] …………………………….
MAINTENANCE: LIGHT FIXTURES / REAR SLIDING DOORS [TO BE PERFORMED BY STORE

PERSONNEL]......................................................................................................................................

MAINTENANCE FUNDAMENTALS: BRACKET RETAINERS / SHELVES / DRAIN / TXV VALVE…
MAINTENANCE FUNDAMENTALS: REFRIG. PACKAGE., TEMPERAT URE CONTROLLER,
CONDENSER PAN ACCESS [TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY]
MAINTENANCE FUNDAMENTALS: HONEYCOMB AIR DIFFUSERS / UPPER SECTION AIR
DUCT [SERVICE TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY].……………..

TROUBLESHOOTING [TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY] .…….
TROUBLESHOOTING - CONDENSING SYSTEM [TRAINED SERVICE PROVIDERS ONLY] ..…..
TROUBLESHOOTING - EVAPORATOR SYSTEM [TRAINED SERVICE PROVIDERS ONLY] ……

PREVENTIVE MAINTENANCE [TO BE PERFORMED BY TRAINED SERVICE PROVIDER] ….....

SERIAL LABEL INFORMATION & LOCATION ..……………………………………...…....…………..…

TEMPERATURE CONTROLLER - CAREL® ...…. ……………………..……..…………………...……..

TECHNICAL SERVICE CONTACT INFORMATION & WARRANTY INFORMATION ...……….….....

2
3

4-5

6
7
8
9

10
11

12
13
14

15
16

17-18

19

20-21

22
23
24
25
26

27-29

30
31

32-33

34

35-37

38

2

MODELS LISTED IN THIS MANUAL / DETERMINING THEIR RESPECTIVE CASE DIMENSIONS

DETERMINING YOUR MODEL AND ITS CASE DIMENSIONS:

Note 1. Your model number can be found on serial label at rear of case (near main power switch).
Note 2. Dimensions of each model can be found at www.structuralconcepts.com. Simply enter
the case model number into the Product Number Search box. Click the product specification
link for complete dimensions.
Note 3. If your specific model is not found, contact technical service (phone number is listed at
Technical Service section in this manual) for dimensions.
Note 4. CDRs (Customer Design Requests) are listed with a 4-digit number. All CDR dimensions
are identical to standard model dimensions.

THIS OPERATING MANUAL ENCOMPASSES THE FOLLOWING MODELS (AND THEIR
RESPECTIVE CDRs):

Models: HMBC2
HMBC3
HMBC4
HMBC5
HMBC6

3

OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS - PAGE 1 of 2

OVERVIEW

 These Structural Concepts Harmony® 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 insure proper
performance. Improper use will void warranty.

NSF® 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 NSF® Type 1 Conditions (most cases): ambient

conditions are to be at 55% maximum humidity and
maximum temperatures of 75 °F [24 °C].

 For NSF® Type 2 Conditions: ambient conditions are

This equipment MUST be installed in compliance with

all applicable NEC, federal, state and local

electrical and plumbing codes.

to be at 60% maximum humidity and maximum
temperatures of 80 °F [27 °C].

 If unsure if unit is NSF® 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

 Following are important warnings to prevent injury or

death.

 Please read carefully!
 See next page for PRECAUTIONS.

COMPLIANCE

WARNING

ELECTRICAL

HAZARD

WARNING

KEEP
HANDS
CLEAR

WARNING

HOT

SURFACE

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 and allow to cool

before cleaning or removing from case.

4

OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS - PAGE 2 of 2

PRECAUTIONS

 Following are important precautions to prevent

damage to unit or merchandise.

CAUTION

Lamps have been treated to resist breakage

and must be replaced with similarly treated lamps.

Use the required GFCI (Ground Fault Circuit Interrupter)

when electrical code mandates such circuit breaker.

When GFCI is required, DO NOT use standard GFI receptacle.

CAUTION

 Performance issues caused by adverse conditions are NOT covered

CAUTION! ADVERSE CONDITIONS / SPACING ISSUES

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).

 Please read carefully!
 See previous page for specifics on OVERVIEW, NSF

TYPE, COMPLIANCE and WARNINGS.

CAUTION

CAUTION

5

INSTALLATION: REMOVAL FROM SKID [LEVELERS vs. CASTERS]

1. Remove Case From Skid (Levelers)

 Remove shipping brace that may be

securing case to skid.

 Support case to prevent tipping.
 Caution! Levelers can be damaged if case

hits floor with heavy force!

 Carefully slide unit to

rear of skid and tip
backward off skid.

 Illustration may not

reflect every feature
or option of your
particular case.

Slide Skid Out

Case can be repositioned with pallet truck when
front lower panel is removed. Blocking may be
necessary to obtain adequate height.

2. Remove Case From Skid (Casters)

Remove shipping brackets that may be securing
casters to skid

 Place ramp up against skid (to allow case to

smoothly slide off from skid).

 Maintain support of case at all times or center

of gravity may cause case to fall.

 Unlock Casters. Roll unit to rear of skid.

Roll down ramp
and off from skid.

Note: Illustrations

shown reflect a

general outline of
sample cases and do
not reflect features or

options of your

particular model.

Ramp

Support
while
rolling
case
down
ramp.

6

INSTALLATION: LOWER FRONT GRILLE and LOWER REAR PANEL REMOVAL / REPLACEMENT

3. Removing Lower Front Grille

 No screw removal is required to remove grille.

Front grille has retainer slots at each end of grille.



Case has retainer hooks at each end.



(2) Front Grille

Retainer Slots

(at Each End

of Grille)

 Simply lift lower front grille up and off retainer

hooks (at each end of case).

 Replace in same manner.
 View below is shown is disassembled for

illustrative purposes only.

(2) Front Grille

Retainer Hooks

(at Each End of Case)

4. Removing Lower Rear Panel

 No screw removal is required to remove panel.

Rear panel has retainer slots at each end of grille.



Case has retainer hooks at each end.



Simply lift lower rear panel up and off retainer



hooks (at each end of case).

 Replace in same manner.
 View below is shown is disassembled for

illustrative purposes only.

(2) Rear Panel
Retainer Slots
(at Each End
of Rear Panel)

7

(2) Lower Rear Panel
Retainer Hooks
(at Each End of Case)

INSTALLATION, CONTINUED: ELECTRICAL CONNECTIONS

5. Electrical Connections

 Ballast Box: Remove 4 screws from the thermostat/ballast cover. Remove screws holding ballast

cover to base.

 Knockouts are located on side and rear of box for making electrical connections.
 Note: Standard 120V or 220V (depending upon case chosen), single phase connections are

required for self contained refrigeration units and must be performed by a certified electrician.

Remove two (2) screws at
each end of cover to remove
thermostat/ballast cover.

Note: Illustrations shown

with rear grille removed for

View of case with

thermostat/ballast cover intact

illustrative purposes only.

Thermostat/Ballast Cover

Ballast Cover

Ballasts

View of case with

Base

thermostat/ballast cover removed

Enlarged view of thermostat/ballast area

8

INSTALLATION, CONTINUED: POSITIONING AND ALIGNING UNITS / GLASS SHELVING

6. Position and Aligning Units

Position Units. Align multiple units carefully in areas
A & B shown at right.

7. Glass Shelving

A

Glass shelving will be packed separately.

 Caution! Carefully remove from packaging.
 Grasp firmly and carefully install.
 Caution! Check that plastic edging is intact

before placing glass shelving onto brackets!

 Plastic edging must NOT be removed from glass

shelves. Contact Structural Concepts for
replacement edging (see TECHNICAL
SERVICE CONTACT INFORMATION section).

 Check that glass shelving is in proper position

before placing product in case.

 See illustration below.

B

Glass Shelves

(Typical)

9

INSTALLATION, CONTINUED: SETUP / POWER CORDS / TEMPERATURE CONTROLLER

8. Merchandiser Setup: Self Contained
Units

 Remove lower front grille; see

INSTALLATION: REMOVAL FROM SKID,
REMOVING LOWER FRONT GRILLE

section in this manual for instructions.

 Insure that the Condenser Pan is installed

under the PVC condensate drain trap.

 Insure that the Condenser Pan is plugged into

the receptacle inside base.

 Return front grille to case.

See Drain, Hose and Bracket Placement



section in Operating Manual for details.

9.a. Self-contained refrigeration with
power cord

 For your safety, equipment is furnished

with a properly grounded cord connector.
Do not attempt to defeat the grounded
connector.

 Plug cord into a certified electrical outlet with

ground.

9.b. Self-Contained refrigeration without
power cord

 Remove the rear lower grille required).
 Note: The compressor/condenser assembly

can be slid out to facilitate maintenance.

 Electrical leads are provided inside the base

exiting the ballast box.

 Leads are labeled for identification.

9.c. Self-Contained Temperature
Controller

 See below for location.
 See Temperature Controller section for

additional information.

PVC Condensate

Drain

Condenser

Pan

Temperature

Controller

Above view shown with rear panel and end panel

removed for illustrative purposes only.

10

INSTALLATION, CONTINUED: REMOTE UNIT ELEC. LEADS / REFRIG. & DRAIN CONNECTIONS

10. Merchandiser Setup: Remote Units
Remote Refrigeration System

Note: Service to be accomplished by

refrigeration / electrical contractor.

10.a. Electrical leads

 Remove screws from rear wire-way cover

to access electrical leads.

 Wiring may run case to case.
 Knockout is provided in bottom of

wireway for stub-up connection.

 Separate leads for lights that are labeled

accordingly.

10.b. Refrigerant Connection

 Remove the front panel.
 Refrigerant stub-up access opening is at

the front on the left hand side of the base.

 Route refrigerant lines thru access hole.

 Remove tube caps from stub up

connections

 Sweat the high and low pressure

connections.

 Fill access hole with suitable filler to in-

sure watertight integrity of tub.

10.c. Drain Connection

 1” male PVC stub-up connection is under

the case on the right hand side.

 Remove the front panel.
 Remove the rear panel (optional).
 Connect tub drain to floor drain. Maintain

1/4” fall per foot to provide proper
drainage.

 Below illustration may not exactly reflect

every feature or option of your case.

Case
Front

Drain Connection

General Location

Evaporator Stub

Ups Access

Case

Rear

11

INSTALLATION, CONTINUED: CASTERS / LEVELERS / CURVED GLASS / REAR DOORS

11. Cases With Casters: Lock and Unlock

Loc

ed

k

d

e

k

c

o

l

n

U

 To lock casters, press down on lever.
 To unlock casters, pull lever up.
 See illustration at right.

12. Cases With Levelers: Adjust Levelers

 After case is in 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 (and possibly a pry bar)

Adjustable

Wrench

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.

Pry Bar

 Use a block to reach base frames with pry bar.
 See illustrations at right.

Block

13. Raising the Curved Glass

 To raise the curved glass, grab the lift handle

extrusion on the bottom edge of the front curved
glass and lift up.

 Gas cylinders hold the glass open for hands free

access to the interior of the case.

14. Removing the Rear Doors

 Move rear doors toward center of the case.
 Individually lift each door up toward the top of the

case; pivot the bottom of the door out.

15. Electrical Wiring Diagram

 Each case has its own wiring diagram folded

Front

Curved

Glass

Lift

Handle

Leveler

Toe-Kick

and in its own packet.

 Wiring diagram placement may vary; it may

be placed near condenser fan cover, ballast
box, raceway cover, or other related location.

16. 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.
 See illustration at right.

Base

Frame

Rear

Doors

12

Check air grilles for obstructions.

Maintain airflow clearance of 6” (min.)

to 12” (recommended) at front & rear.