Structural Concepts G Series User manual

READ AND SAVE THESE INSTRUCTIONS
COMBINATION COLD MERCHANDISERS:
SERVICE UPPER / SELF SERVICE LOWER “TALL DOMES”
>> BLOWER COIL UNITS (STANDARD)
>> GRAVITY COIL UNITS (OPTIONAL)
>> THREE (3) UPPER SECTION VARIABLES:
DELI PRODUCTS: BLOWER COILS
(NO GRAVITY COILS NOR ICE TRAYS)
MEAT PRODUCTS: GRAVITY COILS WITH
PLATTER COILS (NO BLOWER COILS)
SEAFOOD PRODUCTS: GRAVITY COILS WITH
ICE TRAYS (NO BLOWER COILS)
Rev M Date: 8.2.2016
I:\Oper Manual\G-Series\GCDT456RLB_GCDT656RLB_GCDT856RLB_GCDT1056RLB_GCDT1256RLB_20-17016.pub
Structural Concepts Corporation · 888 E. Porter Road · Muskegon, MI 49441 Phone: [phone] Fax: [phone] · www.structuralconcepts.com
Models Included in Operating Manual: GCD456R
GCD656R GCD856R GCD1256R GCDET1256RLB
GCDT456RLB GCDT656RLB GCDT856RLB
GCDTV856RLB.6724A GCDT1056RLB
GCDT1256RLB
INSTALLATION AND
OPERATING MANUAL
G-SERIES
MODEL GCDT656RLB
(LOWER BASE UNIT)
WITH CURVED GLASS
PART NO.
20-17016
MODEL GCD856R
(SHOWN WITH OPTIONAL
SECURITY GRID)
MODEL GCDT1256RLB (LOWER BASE UNIT)
MODEL GCDT856RLB
(LOWER BASE UNIT WITH
CURVED GLASS)
MODEL GCDT656RLB
(LOWER BASE UNIT)
WITH FLAT GLASS
MODEL GCDTV856RLB.6724A
(LOWER BASE UNIT
WITH VERTICAL GLASS)
MODEL GCDT856RLB
(LOWER BASE UNIT WITH
ANGLED GLASS (RAISED
FOR ILLUSTRATIVE
PURPOSES ONLY

2
TABLE OF CONTENTS / MODEL LENGTH, DEPTH & HEIGHT
TABLE OF CONTENTS ………………………………………………………………………………………....
OVERVIEW / TYPE / COMPLIANCE / WARNINGS / PRECAUTIONS / WIRING DIAGRAM / PLUGS .
INSTALLATION: REMOVAL FROM SKID, REMOVING VERTICAL LOWER FRONT PANEL …….…..
INSTALLATION: POSITIONING & ALIGNING CASE / BOLTING & CAULKING UNITS TOGETHER ...
INSTALLATION: FRAME SUPPORT RAIL SHIMMING ……………………………………………………..
INSTALLATION, CONT.: ADJUSTING LEVELERS ………………………………………………………….
INSTALLATION: TEMPERATURE & DEFROST CONTROL / REAR PANEL REMOVAL /
THERMOMETERS ...………………………………………………………………………………...….
STORE PERSONNEL SECTION ONLY ..……………………………………………………….……….……
OPERATION: DRIVERS / BALLASTS / T’BLOCK / CONTACTOR, ETC., GENERAL LAYOUT ............
OPERATION: MAIN PWR SWITCH / THERMOSTAT (S.C. UNITS ONLY) / SCALE STAND ………….
OPERATION: BLOWER COIL UNIT (DELI CASE) REFRIG. LINES / DRAINS / TXV, ETC…………….
OPERATION: PLATTER COIL / GRAVITY COIL (MEAT CASE): REFRIG. LINES / DRAINS / TXV…...
OPERATION: GRAVITY COIL / ICE TRAYS (SEAFOOD CASE): REFRIG. LINES / DRAINS / TXV ....
OPERATION: (MODEL GCDT1256RLB GRAVITY COIL UNIT) DRAIN CONNECTIONS / AXIAL
FANS ………………………………………………………………………………………………...…...
OPERATION: GRAVITY COIL UNITS - ADJUSTABLE DECKING (4° AND 8° ANGLES) /
HUMIDICATION FEATURE (MISTING/FOGGING DEVICE) ……..………………………………..
OPERATION: DISPLAY CASE START-UP / LIGHT SWITCHES / REAR STORAGE & SHELVING .....
OPERATION: DISPLAY CASE START-UP, LIGHTS, TEMPERATURE CONTROLLER, SST ………...
STOCKING / MAINTAINING PROPER PRODUCT CONDITION ………………………………………….
MAINTENANCE: REAR SLIDING DOORS / STANDARD LIGHT FIXTURES ……….…………………...
MAINTENANCE: BRACKET RETAINERS / SHELVES / LOAD LIMITS …………………………………..
MAINTENANCE: PRODUCT PLACEMENT / PAN PLACEMENT (MEAT CASE) ...……………………...
MAINTENANCE: CUTTING BOARD/REAR LEDGE LOWERING .......…………………………………….
CLEANING SCHEDULE (INTERIOR) - TO BE PERFORMED BY STORE PERSONNEL………….…..
CLEANING SCHEDULE (EXTERIOR) - TO BE PERFORMED BY STORE PERSONNEL…………..…
TROUBLESHOOTING - TO BE PERFORMED BY STORE PERSONNEL ……………...…...……….….
TRAINED SERVICE PROVIDERS SECTION ONLY ………………………………………………….…….
REFRIGERATION PACKAGE LAYOUT: MODEL GCD456R SELF-CONTAINED UNIT ………………..
REFRIGERATION PACKAGE LAYOUT, CONT.: MODEL GCD856R SELF-CONTAINED UNIT ……...
CLEANING SCHEDULE (INTERIOR) - TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ..
TROUBLESHOOTING - TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY …………
PREVENTIVE MAINTENANCE - TO BE PERFORMED BY TRAINED SERVICE PROVIDERS ONLY .
MAINTENANCE - FRONT GLASS ALIGNMENT & ADJUSTMENT VIA CLAMSHELL SCREWS ……..
MAINTENANCE, CONT. - FRONT GLASS ALIGNMENT VIA FRAME SUPPORT RAILS ……………...
MAINTENANCE, CONT. - FRONT GLASS ALIGNMENT VIA LEVELERS ………………..……………...
GENERAL TECHNICAL INFORMATION (PARTS LIST / SERIAL LABEL INFO / TEMPERATURE
CONTROLLER INFORMATION / TECHNICAL SERVICE INFORMATION, ETC.) ...…………..
SERIAL LABEL INFORMATION & LOCATION ..……………………………………...…....……………..…
CAREL TEMPERATURE CONTROLLER (THERMOSTAT) INFORMATION …………………………….
TECHNICAL SERVICE CONTACT INFORMATION & WARRANTY INFORMATION ...……….……......
2
3-4
5
6
7
8
9
10
11
12
13-15
16-17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34-35
36-38
39
40
41
42-43
44
45
46-48
49

3
OVERVIEW
 Upper Section: This merchandiser is designed to
merchandise unpackaged product at a range of 33 °F
to 38 °F (1 °C to 3 °C) product temperatures.
 Lower Section: This merchandiser is designed to
merchandise packaged product at 41 °F (5 °C) or less
product temperatures.
 Product Pre-Chill Requirement: Product must be
pre-chilled to above listed temperatures prior to being
placed in merchandiser.
 These cases should be installed and operated
according to this operating manual’s instructions to
ensure proper performance. Improper use will void
warranty.
 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 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 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
ELECTRICAL
HAZARD
WARNING
KEEP
HANDS
CLEAR
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
CAUTION! CHECK BOTH CONDENSATE PAN AND OVERFLOW PAN
Water on floor can cause extensive damage! Before powering up unit:
 Condensate pan MUST BE positioned directly under condensate drain.
 Overflow pan MUST HAVE single plug connected to its box. Units with
optional Clean Sweep™ MUST HAVE two plugs connected.

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.).
CAUTION
CAUTION! LAMP REPLACEMENT GUIDELINES
Fluorescent lamps have been treated to resist breakage and
must be replaced with similarly treated lamps.
CAUTION
PRECAUTIONS
 This sheet contains 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
 Wiring diagram is in its own packet near ballast box,
field wiring box, raceway cover or related location.
POWER CORD AND PLUG MAINTENANCE
 Caution! Risk of electric shock.
 If cord or plug becomes damaged, replace only with
cord and plug of same type.
CAUTION! UPPER SECTION (GRAVITY COIL DRIP
TRAY ASSEMBLY) MUST BE DEFROSTED AND
CLEANED AT LEAST WEEKLY!
 See defrost icon and instructions provided below.
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! UPPER REFRIGERATION SYSTEM MUST BE TURNED OFF,
THOROUGHLY DEFROSTED AND CLEANED AT LEAST WEEKLY!
For optimum performance, maintenance is required at least weekly.
1. Cleaning controls switch is NOT supplied by SCC, but it may be
provided by others. If a switch is accessible, flip to “OFF” position.
If not, contact facility manager to turn off upper refrigeration system.
2. Allow upper refrigeration system to thoroughly defrost.
3. Clean its interior by washing and sanitizing.
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
INSTALLATION: REMOVAL FROM SKID, REMOVING VERTICAL LOWER FRONT PANEL
1. Remove Case From Skid (Rails)
 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!
Case can be repositioned with pallet truck when front
lower panel is removed. Blocking may be necessary to
obtain adequate height.
Slide Skid Out
 Carefully slide unit to
rear of skid and tip
backward off skid.
 Illustration may not
reflect every feature
or option of your
particular case.
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.
Ramp
 Roll down ramp
and off from skid.
Support
while
rolling case
own ramp.
Note: Illustrations
shown reflect a
general outline of
sample cases and do
not reflect features or
options of your
particular model.
3. Removing Vertical Lower Front 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.
Lower Front Panel
(Reversed to Show Slots
Hooks
Slots

6
INSTALLATION, CONT.: POSITIONING & ALIGNING CASE / BOLTING & CAULKING UNITS TOGETHER
4. Position & Align Case Alongside Other
Cases
 Before adjusting levelers (or shimming frame
support rails), make certain that 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.
5. Bolting and Caulking Units Together
Follow these steps to assure a secure, level lineup.
A. Begin lineup leveling from highest point of floor.
B. After ‘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). See caulk/silicone illustrations at
lower-left.
C. Form Two (2) Caulk/Sealant Lines: (Sanitation
and Refrigeration). See illustration at mid-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 (and/or screws) found in
installation packet, insert bolts in bolt hole locations
(shown below). You may need to remove decking
to access lower bolt holes.
F. Caution! Front of cases MUST be flush with each
other! After leveling, cases are to be 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.
Sanitation
Bead
Refrigeration
Bead
Refrigeration
Bead
Sanitation
Bead
Approximate hole
locations pointed at
with arrows ( )
for bolting units
together.
Sanitation Bead Refrigeration Bead
Refrigeration
Bead
Butyl is to be used on
non-visible areas.
Silicone is to be used
on visible areas.

7
INSTALLATION, CONT.: FRAME SUPPORT RAIL SHIMMING
Note: Above Illustration May Not Depict An Exact
Representation Of Your Particular Unit Being Installed.
6. 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.
 Caution: If glass scrapes against edges of case or
against each other, see TROUBLESHOOTING -
FRONT GLASS ALIGNMENT ISSUES section in
this manual.
Frame Support
Rails

8
INSTALLATION, CONT.: ADJUSTING LEVELERS
7. Adjust Levelers
 After case is in position, adjust case so it is
level and plumb see illustration below.
 You may need to remove front and/or rear
Toe-Kick to access levelers.
 Use adjustable wrench (and possibly a pry bar)
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.
 Use a block to reach base frames with pry bar.
 Note: Illustration below may not exactly reflect
every feature or option of your particular case.
Pry Bar
Base
Frame
Leveler
Adjustable
Wrench
Toe-Kick
Block

INSTALLATION: TEMPERATURE & DEFROST CONTROL / REAR PANEL REMOVAL / THERMOMETERS
9
8. Temperature & Defrost Control
 Both temperature controller and defrost controller
are remotely controlled.
 Consult store management for guidance and
instructions.
9. Rear Panel Removal
 No screw removal is required.
 Lift lower front panel slots up and off case hooks.
 Replace in same manner it was removed.
Lower Rear Panel
(Reversed to Show Slots)
Lower
Rear Panel Slots
Enlarged View
Of Hooks (To Attach
Rear Panel’s Slots)
10. Thermometer Placement & Purpose
 Front thermometers are located against rear
plenums.
 Rear thermometers may be located in rear
storage bins above shelves (at angled
positions), however location may vary.
 Rear thermometers are in upper section just
inside rear doors (as shown below).
 Thermometers may be either spirit-filled or
digital. They reflect internal air temperature only
(not actual food temperature).
 Use probe thermometers to determine actual
product temperatures.
Thermometers Are
Also located in
Rear Storage
Areas (Typical)
Thermometers Are Located in
Upper Storage Areas (Typical)
Note: Thermometer Locations May
Vary Depending Upon Model.

10
STORE PERSONNEL’S SECTION ONLY
STORE PERSONNEL
SECTION ONLY

OPERATION: DRIVERS / BALLASTS / TERMINAL BLOCK / CONTACTOR, ETC., GENERAL LAYOUT
11
1. Ballasts and Field Wiring Box
 Electrical raceways contain various electrical
components.
 Access to these components can be made
simply by removing raceway cover.
Drivers/Ballasts
 See illustrations below for general layouts.
 Caution! Only certified electricians are to
access electrical components!
Terminal Block Contactor Driver: Front Fan Ballast Drivers
(Alternate Placement)
Model GCDT1256RLB is Shown Below
(Your Component Layout May Vary)
Electrical Component Raceway (For Multiple Model Layouts) is Shown Below
(Your Case’s Model and Layout May Vary)

OPERATION, CONT.: MAIN POWER SWITCH / THERMOSTAT (S.C. UNITS ONLY) / SCALE STAND
12
2. Main Power Switch
 Self-Contained units have main power switch
at case rear.
 When main power switch is turned on, power
is provided to entire case.
 See illustration below.
3. Thermostat
 Depending upon options chosen, both remote
and self-contained units may have their
temperature controlled by thermostat.
 Thermostat is located at case rear (as shown as
illustration below).
 See OPERATION, CONT.: DISPLAY CASE
LIGHTS, TEMPERATURE CONTROLLER, SST
section in this manual for additional information.
 See entire Carel Controller section in this manual
for detailed information including programming,
user interface and operating parameters.
4. Scale Stand / Power Outlets / CAT5
Receptacle
 Depending upon the model, there can be one or
several scale stands.
 Scale stands have power outlets for scale stand
plug, etc.
 Scale stands also may have CAT5 receptacles for
on-line connection capability.
 See illustration below.
Thermostat
Main
Power Switch
CAT5
Receptacle
Power Outlets

13
OPERATION, CONT.: BLOWER COIL UNIT (DELI CASE) REFRIG. LINES / DRAINS / TXV, ETC.
5. Blower Coil Unit (Deli Case) Refrigeration Lines / Stub-Ups / Drain, TXV , Etc.
 Illustration on this sheet is applicable to model GCDT856RLB only.
 See next page for illustration pertaining to model GCDT656RLB.
 Blower coil units do not have gravity coils nor platter coils.
 Two (2) trough drains are in each case. One (1) is at each end of case (as illustrated on next page).
 See illustration below for locations of components under upper and lower section decks.
TXV
Filter Dryer
(Optional) Fan Shroud DrainFan
Assembly
(Typical)
Shutoff
Valve
(Optional)
Fan
Shroud TXVFan
Assembly
(Typical)
Note: Model GCDT856RLB (Shown Above) May Not
Depict An Exact Representation Your Unit Being Installed.
TXV
Filter
Dryer
(Optional) Fan
Shroud
Drain
Fan
Assembly
(Typical)
Shutoff
Valve
(Optional) Fan
Shroud
TXV
Fan
Assembly
(Typical)

14
OPERATION, CONT.: BLOWER COIL UNIT (DELI CASE) REFRIG. LINES / DRAINS / TXV, ETC.
6. Blower Coil Unit (Deli Case) Refrigeration Lines / Stub-Ups / Drain, TXV , Etc.
 Illustration on this sheet is applicable to model GCDT656RLB only.
 See next page for illustration pertaining to model GCDTV856RLB.6724A.
 Blower coil units do not have gravity coils nor platter coils.
 Two (2) trough drains are in each case. One (1) is at each upper section / one is at lower section.
 See illustration below for locations of components under upper and lower section decks.
TXVFan Shroud DrainFan Assembly
(Typical)
Fan Assembly
(Typical)
Note: Model GCDT656RLB (Shown Above) May Not
Depict An Exact Representation Your Unit Being Installed.
Fan
Shroud
Drain
Fan
Assembly
(Typical)
Fan
Shroud
TXV
Fan
Assembly
(Typical)
Solenoid Valve
Assembly (Optional)
Solenoid Valve
Assembly (Optional)

15
OPERATION, CONT.: BLOWER COIL UNIT (DELI CASE) REFRIG. LINES / DRAINS / TXV, ETC.
7. Blower Coil Unit (Deli Case) Refrigeration Lines / Stub-Ups / Drain, TXV , Etc.
 Illustration on this sheet is applicable to model GCDTV856RLB.6724 only.
 Blower coil units do not have gravity coils nor platter coils.
 Two (2) trough drains are in each case. One (1) is at each upper section / one is at lower section.
 See illustration below for locations of components under upper and lower section decks.
TXV
Fan Shroud DrainFan
Assembly
Fan
Assembly
Note: Model GCDTV856RLB.6724A (Shown Above) May Not
Depict An Exact Representation Your Unit Being Installed.
Fan
Shroud Drain
Fan Assembly
(Typical)
Fan
Shroud
TXV
Fan
Assembly
(Typical)
Solenoid
Valve
Assembly
(Optional)
Solenoid Valve
Assembly (Optional)
Filter
Dryer TXV
Filter
Dryer
Shutoff
Valve
Shutoff
Valve

16
OPERATION, CONT.: PLATTER COIL / GRAVITY COIL (MEAT CASE): REFRIG. LINES / DRAINS / TXV
TXV
Solenoid Valve
Ass’y (Optional)
Shutoff Valve
(Optional) Filter Dryer
(Optional) Drain
Note: Model GCDT856RLB (Shown Above) May Not
Depict An Exact Representation Your Unit Being Installed.
8. Platter Coil Unit (Meat Case) Refrigeration Lines / Stub-Ups / Drain, TXV, Etc.
 Illustration on this sheet is applicable to model GCDT856RLB only.
 See next page for illustration pertaining to model GCDT656RLB.
 Platter coil units also have gravity coils above. No ice trays.
 Two (2) trough drains are in each case. One (1) is at each upper section / one is at lower section.
 Also, see illustration below for locations of components under upper and lower section decks.
Platter Coils
(Meat Case Only)
TXV
Filter Dryer
(Optional) Fan Shroud DrainFan
Assembly
(Typical)
Shutoff
Valve
(Optional)
Fan
Shroud TXVFan
Assembly
(Typical)
EPR
(Optional)
Drain

17
OPERATION, CONT.: PLATTER COIL / GRAV. COIL (MEAT CASE): REFRIG. LINES / DRAINS / TXV
TXV
Solenoid Valve
Assembly (Optional)
Shutoff Valve
(Optional) Filter Dryer
(Optional) Drain
Note: Model GCDT656RLB (Shown Above) May Not
Depict An Exact Representation Your Unit Being Installed.
9. Platter Coil Unit (Meat Case) Refrigeration Lines / Stub-Ups / Drain, TXV, Etc.
 Illustration on this sheet is applicable to model GCDT656RLB only.
 See previous page for illustration pertaining to model GCDT856RLB.
 Platter coil units also have gravity coils above. No ice trays.
 Two (2) trough drains are in each case. One (1) is at each end of case (as shown in illustration below).
 Also, see illustration below for locations of components under upper and lower section decks.
Platter Coils
(Meat Case Only)
TXV
Filter Dryer
(Optional) Drain
Shutoff Valve
(Optional) Fan
Shroud
Fan
Assembly
(Typical)
Drain
Fan Assembly
(Typical)

18
OPERATION, CONT.: GRAVITY COIL / ICE TRAYS (SEAFOOD CASE): REFRIG. LINES / DRAINS / TXV
TXV
TXV
Drain
Drain
Note: Model GCDT1256RLB (Shown Above) May Not
Depict An Exact Representation Your Unit Being Installed.
10. Gravity Coil Unit With Ice Trays (Seafood Case) Refrigeration Lines / Stub-Ups / Drain,
TXV, Etc.
 Ice trays have been removed for illustrative purposes.
 No blower coils are in upper section of case.
 Each of the three (3) sections has a drain.
 See illustration below for locations of components under upper decks.
 See previous sheets for location of components under lower decks.
TXV
Electrical
Pass-Through
Solenoid Valve
Assembly (Optional)
Refrigeration Line
Pass-Through
EPR
(Optional)
Drain
Filter Dryer
(Optional)

19
OPERATION, CONT.: (MODEL GCDT1256RLB GRAV. COIL CASE) DRAIN CONNECT’S / AXIAL FANS
11. Drain Connection
Lower front panel may be removed to access the
drain stub-up for upper section drain. See
INSTALLATION: REMOVAL FROM SKID,
REMOVING VERTICAL LOWER FRONT PANEL
section in this manual for removal instructions.
 After access, panels must be replaced in reverse
order they were removed.
 Connect tub drain to floor drain. Maintain
1/4”-fall per foot to provide proper drainage.
Refrigeration Line
Stub-Ups Access
P-Trap
(Lower Section)
Upper Section
Drain Upper Section Drains
Note: Model GCDT1256RLB (Shown Above).
Panels Have Been Removed to Show Axial Fans.
Axial Fans To Cool Front-Right
Lower Section of Case
Axial Fans To Cool Middle-Lower
Section of Case
Axial Fans To Cool Front-Left
Lower Section of Case
 Note: Illustration below may not reflect every
feature or option of your particular case.
12. Axial Fan Access
 Rear axial fan cover panels may be removed
(via screw removal) to access axial fans.
 After access, panels must be replaced in reverse
order they were removed.

OPERATION, CONT.: GRAVITY COIL UNITS - ADJ. DECKING (4° & 8° ANGLES) / HUMIDIFICATION
20
13. Adjustable Decking (Gravity Coil Cases)
 Decks can be angled to allow more consistent
water drainage.
 Ice pan brackets have hooks that are to be
placed in either lower or upper slots in uprights.
 Lower slots will raise decking 4°.
 Upper slots will raise decking 8°.
 To adjust, simply lift ice pan brackets up and
out of notches in uprights.
 Move bracket up, down or remove entirely from
case. See illustrations below. 8° Notch In
Upright
4° Notch In
Upright
Ice Pan
Bracket Hook
Ice Pan
Bracket
Ice Pan
Bracket
Decking
14. Humidification Feature
 Humidification feature allows the case to retain
proper humidity levels without ‘wetting’ the product.
 The ultrasonic nozzle produces a fine vapor fog
(“mist”) behind ice pan bracket that permeates entire
upper section of case.
 Misting prevents the ‘drying effect’ of refrigeration.
 See illustration immediately below.
Note: Model GCDT856RLB
(Shown At Left) May Not Depict
An Exact Representation Your
Particular Unit.
Misting Nozzle (Providing
Humidification To Upper
Section of Case)