READ AND SAVE THESE INSTRUCTIONS
INSTALLATION AND
G-SERIES
OPERATING MANUAL
PN 5-4467
G-SERIES GMG GRAVITY COIL MEAT & SEAFOOD REFRIGERATED SERVICE DISPLAY CASE
Model GMG12 Meat Case:
Model GMG6 Meat Case:
Self-Contained Unit
Rear Sliding Doors Intact.
Wire Racks Used (Instead of Ice Pans as
used in Meat Case Models GMG4)
Remote Unit
Rear Sliding Doors Removed.
Wire Racks Used (Instead of Ice Pans
as used in Seafood Model GMG4)
Model GMG12 Hybrid Unit Meat Case:
Gravity Coil (Upper), Evaporator Coil (Lower) and Shelf
Rear Sliding Doors Removed. Wire Racks Used
(Instead of Ice Pans as used in Seafood Model GMG4)
Model GMG4 Seafood Case (Above):
Remote Unit
Rear Sliding Doors Removed.
Ice Pans Used (Instead of Wire Racks as used in
Meat Case Models GMG6, GMG8 and GMG12)
I:\Oper Manual\Standard\G-Series_GMG_Gravity_Coil_Meat-Seafood_5-44 67.pub
Structural Concepts Corporation · 888 E. Porter Road · Muskegon, MI 49441 Phone: 231.798.8888 Fax: 231.798.4960 · www.structuralconcepts.com
Model GMG4…………………………….51”L* x 42 3/4”D^ x 51 5/8”H~
Model GMG6…………………………….75 1/4”L* x 42 3/4”D^ x 51 5/8”H~
Model GMG8…………………………….99 3/4”L* x 42 3/4”D^ x 51 5/8”H~
Model GMG12………………………….148 1/2”L* x 42 3/4”D^ x 51 5/8”H~
* End Panels Included (Will Not Apply To Lineups)
^49 5/8 Deep With Cutting Board Raised
~ Measurement is From Underside of Rail Support
Below Base Frame (Rails Flush With Floor)
Remote Unit
Rev F Date: 12.20.2013
TABLE OF CONTENTS
TABLE OF CONTENTS …………………………………………………………………………………….…..
OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING .……………...
INSTALLATION: REMOVAL FROM SKID, REMOVING LOWER FRONT PANEL / REAR PANEL ….
INSTALLATION: FRAME SUPPORT RAIL SHIMMING …………………………………………………….
INSTALLATION: FRONT GLASS ALIGNMENT & ADJUSTMENT (VIA RAIL SYSTEM) ………………
INSTALLATION: PROBE LEADS BOX / FIELD WIRING BOX / BALLAST (OR OPTIONAL LED
DRIVER) / AXIAL FANS ……………………………………………………………………………….
OPERATION: WIRE RACKS ACCESS AND REMOVAL (MEAT CASES ONLY) - PAGE 1 of 2 ..........
OPERATION: ICE TRAY ACCESS AND REMOVAL (MEAT CASES ONLY) - PAGE 2 of 2 ………….
OPERATION: REFRIG. LINES ROUTING / DRAINS / TXV (SEAFOOD CASES ONLY) PG 1 of 2 ...
OPERATION: ICE TRAY ACCESS AND REMOVAL (SEAFOOD CASES ONLY) - PG 2 of 2 .............
OPERATION: REFRIGERATION LINES / STUB-UPS / DRAINS (GMG8 MODEL) - PG 1 of 2 ..……..
OPERATION: REFRIGERATION LINES / STUB-UPS / DRAINS (GMG12 MODEL) - PG 2 of 2 .…….
OPERATION: HYBRID CASE GRAVITY COILS, EVAPORATOR COILS, SHELVING / LAYOUT .…..
OPERATION: SELF-CONTAINED MODEL MEAT CASE REAR DRAIN/TEMP. CONTROLLER …….
OPERATION: SELF-CONTAINED MODEL SEAFOOD CASE DRAIN/TEMP. CONTROLLER ……….
OPERATION: DISPLAY CASE START-UP / LIGHT SWITCHES ………………………………………...
STOCKING / MAINTAINING PROPER PRODUCT CONDITION / IMPORTANT PROCEDURES …....
MAINTENANCE FUNDAMENTALS: DISPLAY SHELVES AND BRACKETS …………………………...
MAINTENANCE FUNDAMENTALS: REAR SLIDING DOORS / STANDARD LIGHT FIXTURES……..
MAINTENANCE FUNDAMENTALS: OPTIONAL LED LIGHT FIXTURES ……………………………….
MAINTENANCE FUNDAMENTALS: PRODUCT PLACEMENT TO MAINTAIR PROPER AIRFL OW ..
MAINTENANCE FUNDAMENTALS: CUTTING BOARD / REAR LEDGE REMOVAL …...………….....
REFRIGERATION PACKAGE (SELF-CONTAINED UNITS ONLY) ...…………………………………….
CLEANING SCHEDULE - TO BE PERFORMED BY STORE PERSONNEL (INTERIOR) ……………..
CLEANING SCHEDULE - TO BE PERFORMED BY STORE PERSONNEL (EXTERIOR) ………..…..
TROUBLESHOOTING - GENERAL ISSUES ………………………………………..…………...………….
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 ...……….…........
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OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING - PAGE 1 of 2
OVERVIEW
This merchandiser is designed to merchandise
unpackaged product at a range of 33°F to 38°F (1 °C
to 3 °C) product temperatures.
Cases should be installed and operated according to
this operating manual’s instructions to insure 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 60% maximum humidity and maximum
temperatures of 80 °F (27 °C).
If unsure if unit is designed for Type 1 or Type 2
conditions, see tag next to serial label. See SERIAL
This equipment MUST be installed in compliance with
all applicable NEC, federal, state and local
electrical and plumbing codes.
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 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.
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.
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OVERVIEW / NSF® TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING - PAGE 2 of 2
PRECAUTIONS
Following are important precautions to prevent
damage to unit or merchandise.
Please read carefully!
See previous page for specifics on OVERVIEW, NSF
TYPE, COMPLIANCE and WARNINGS.
CAUTION! LAMP REPLACEMENT GUIDELINES
LED lamps reflect specific size, shape and overall design.
CAUTION
Any replacements must meet factory specifications.
Fluorescent lamps have been treated to resist breakage and
must be replaced with similarly treated lamps.
CAUTION! GFCI BREAKER USE REQUIREMENT
If N.E.C. (National Electric Code) or your local code
requires GFCI (Ground Fault Circuit Interrupter) protection,
you MUST use a GFCI breaker in lieu of a GFCI receptacle.
WIRING DIAGRAM
Each case has its own wiring diagram folded and in
its own packet.
Wiring diagram placement may vary; it may be
placed near ballast box, field wiring box, raceway
cover, or other related location.
CAUTION
CAUTION! ADVERSE CONDITIONS / SPACING ISSUES
Performance issues caused by adverse conditions are NOT covered
by warranty.
End panels must be tightly joined or kept at least 6-inches away from
any structure to prevent condensation.
Unit must be kept at least 15-feet from exterior doors, overhead HVAC
vents or any air curtain disruption to maintain proper temperatures.
Unit must not be exposed to direct sunlight or any heat source (ovens,
fryers, etc.).
Tile floors, low ceilings or small rooms will increase noise level.
Whisper Cool compressor blanket or remote unit may resolve noise
level issues.
Keep at least 8-inch clearance above unit for air discharge
(self-contained units only).
CAUTION! CHECK EVAPORATOR PAN POSITION AND PLUG
Water on flooring can cause extensive damage!
Evaporator pan MUST BE positioned directly under condensate drain.
Evaporator pan plug MUST BE securely plugged into receptacle.
Before powering up unit, check the following:
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INSTALLATION: REMOVAL FROM SKID, REMOVING LOWER FRONT PANEL / REAR PANEL
1. Remove Case From Skid (Rails)
Remove shipping brace that may be
securing case to skid.
Support case to prevent tipping.
Caution! Rails 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.
Slots
Hooks
2. Removing Vertical Lower Front Panel (and Rear Panel)
Removing Lower Front Panel
No screw removal is required to remove lower front panel.
Simply lift lower front panel slots up and off case hooks.
Replace in same manner it was removed.
Rear panel is removable in same manner.
Note: Illustrations below may not exactly reflect every
feature or option of your particular case.
5
Lower Front Panel
(Reversed to Show Slots
INSTALLATION: FRAME SUPPORT RAIL SHIMMING
Note: Unit shown may not exactly reflect every feature or option of your particular unit.
1. 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.
This may require the repositioning of the case you
are installing or
Though case below shows both end panels,
the already positioned case.
case adjoinments routinely consist of end panel
removal for case-to-case placement.
2. Frame Support Rails Must Be Shimmed
Illustration below shows case with 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
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INSTALLATION: FRONT GLASS ALIGNMENT & ADJUSTMENT (VIA RAIL SYSTEM)
T
Front Glass Alignment & Adjustment via Rail System (For Curved and Flat Front Glass)
Proper alignment of the front glass is important to create and maintain a seal inside the case.
Improper alignment can cause air leaks compromising the environment insid e the case and create condensation.
Follow the five steps listed below to assure proper front glass alignment.
Illustrations shown may not exactly reflect every feature or option of your particular case.
5-4580
1. Side-to-Side Leveling
to front glass). Raise or lower either side of case by inserting shims
under the rails to level the case (following steps 3 and 4 below).
Case with Curved
Front Glass
Rails
: Place a level on top of display case (parallel
2. Front-to-Back Leveling
Place a level on top of case,
perpendicular to the front glass.
Raise or lower either side of case
by shimming under the rails
(following steps 3 & 4 below).
Double-check the side-to-side level.
END PANEL
3. If FRONT-LEFT CORNER is
hitting it), insert shims at the
BACK LEFT CORNER of case.
PANEL
too close to end panel (or
:
FRON
GLASS
Rails
LIFT
Case with Flat
Front Glass
Rails
FRONT
GLASS
END PANEL
PANEL
4. If FRONT-RIGHT CORNER is too close
to end panel (or hitting it), insert shims at
the BACK RIGHT CORNER of case.
LIFT
5. Verification:
After inserting shims, open and shut the front glass.
Verify (again) that the front glass is properly aligned at both left-hand and right-hand side of the
case.
If not, repeat the shimming procedure until the front glass is properly aligned along both sides of
the case.
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INSTALLATION: PROBE LEADS BOX / FIELD WIRING BOX / BALLAST (OR OPTIONAL LED DRIVER)
Probe Leads Box / Field Wiring Box / Ballast (or
Optional LED Driver) / Terminal Strip / Axial Fans
Probe leads are in probe leads box. It is located at
customer front-left of case (behind front panel).
Field wiring box is also located at front left of case
(behind front panel)
Ballast (or optional LED driver) and terminal strip is also
located behind front electrical cover (shown removed for
illustrative purposes).
Screws hold front electrical cover in place. Unscrew
and drop electrical cover down & out.
Anti-condensate axial fans may be accessed (behind of
front panel) by simply removing four (screws), and
dropping fans down.
Caution! Only certified electricians are to access
electrical components!
Anti-Condensate Axial
Fans Behind Front Panel
Probe Leads Box
(at Customer
Front-Left)
Light
Ballast
Anti-Condensate
Axial Fans (For Front
Glass) Are Behind
Upper Front Panel
Front Electrical Cover
Removed for
Illustrative Purposes
(2) Hooks at Each End
for Front Panel Slots
Terminal
Strip
View of Case With Front Panel
and Electrical Cover Removed
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LED Driver (Optional,
Dependent Upon Lighting)
OPERATION: WIRE RACKS ACCESS AND REMOVAL (MEAT CASES ONLY) - PAGE 1 of 2
Wire Racks Access and Removal (Meat Cases Only)
Wire racks are placed directly over hot gas loop refrigeration system (including TXV valves).
There are no separate deck pans.
See next page for view of unit after removal of wire racks.
Hot Gas Loop
Refrigeration
Wire Racks
Model GMG12 Shown Above.
Your Case May Differ
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OPERATION: REFRIGERATION LINES ROUTING / DRAINS / TXV VALVE (MEA T CASES) - PG 2 of 2
> Case is Shown After Removal of Wire Racks
Refrigeration Line Routing
Refrigerant line routing location is shown below.
Illustration below may not reflect every feature or
option of your particular case.
Refrigeration Line
Stub-Ups Access
Drain
Model GMG8 Shown Below.
Your Case May Differ
Drain
Drains and TXV Valve
Cases have drains at left and right hand sides.
Longer cases also have drain at case center.
Illustration below may not reflect every feature or
option of your particular case.
TXV Valve
(Not on Model GMG6)
Drain
TXV
Refrigeration
Lines
Drain
Model GMG4 Shown
At Left. Your Case
May Differ
Drain
TXV
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OPERATION: ICE TRAY ACCESS AND REMOVAL (SEAFOOD CASES ONLY) - PAGE 1 of 2
Ice Trays Access and Removal (Seafood Cases Only)
Ice trays have handles for ease of lifting in and out of case.
There are no separate deck pans.
Ice trays may be removed for cleaning and service. Simply lift front glass to access.
Ice trays are placed directly over tub (with TXV, refrigeration lines, drains, etc.). See illustration on next
page for component breakdown.
Model GMG4 Shown Above.
Your Case May Differ
11
Ice Trays (With Handles
For Ease of Operation)
OPERATION: ICE TRAY ACCESS AND REMOVAL (SEAFOOD CASES ONLY) - PAGE 2 of 2
Layout of Tub Area After Removal of Ice Trays (Seafood Cases Only)
Ice trays are removed to show component layout.
Illustration below shows drains, TXV, Solenoid, Tub, Refrigeration Line Route, etc.
Refrigeration Line
Route
Drain
TXV Solenoid
Model GMG4 Shown Above.
Your Case May Differ
12
Tub
Drain
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