Hussmann REACH-IN User manual

All illustrations use the RL, RLN, and RLNI nomenclatures for reference for clarity.
Micro-DistributedMicro-Distributed
Reach-In Merchandisers with R-290 RefrigerantReach-In Merchandisers with R-290 Refrigerant
Installation & Operation ManualInstallation & Operation Manual
Use this manual along with door manual
P/N 0425683 for cases with Innovator Doors
December 2022
P/N 3053328_H
Spanish P/N 3053329
MANUAL - IO MDS Low Temp
REACH-INREACH-IN
»If the information in these instructions are not followed exactly, a fire or explosion
may result, causing property damage, personal injury or death.
»Installation and service must be performed by a qualified installer or service agency.
»READ THE ENTIRE MANUAL BEFORE INSTALLING OR USING THIS EQUIPMENT.
»The unit uses R-290 gas as the refrigerant. R-290 is flammable and heavier than
air. It collects first in low areas but can be circulated by the fans. If propane gas
is present or even suspected, do not allow untrained personnel to attempt to find
the cause. The propane gas used in the unit has no odor. The lack of smell does
not indicate a lack of escaped gas. If a leak is detected, immediately evacuate all
persons from the store, and contact the local fire department to advise them that
a propane leak has occurred. Do not let any persons back into the store until the
qualified service technician has arrived and that technician advises that it is safe to
return to the store. No open flames, cigarettes, or other possible sources of ignition
should be used inside or in the vicinity of the units.
»FAILURE TO ABIDE BY THIS WARNING COULD RESULT IN AN EXPLOSION,
DEATH, INJURY AND PROPERTY DAMAGE.
WARNINGS:
This manual applies to the following case models:
• RL2W - RL5W
• RLN2W - RLN5W
• RLNI4W - RLNI5W
• RL2SP - RL5SP
• RLNI2SP - RLNI5SP
• RLNI5SP - RLNI5SP
• RLT2W - RLT5W
• RM2W - RM5W
• RMN2W - RMN5W

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3110586_C
II
BEFORE YOU BEGIN
READ THESE INSTRUCTIONS COMPLETELY AND CAREFULLY.
This manual was written in accordance with originally prescribed
equipment that is subject to change. Hussmann reserves the right to
change or revise specifications and product design in connection with
any feature of our products.
SAFETY INSTRUCTIONS
Personal Protection Equipment (PPE) is required. Wear safety glasses,
gloves, protective boots or shoes, long pants, and a long-sleeve shirt
when working with this equipment and while handling glass.
The safety of our customers and employees is paramount. The
precautions and procedures described in this manual are intended
as general methods for safe use of this equipment. Please be sure to
comply with the precautions described in this manual to protect you
and others from possible harm.
1. If the information in these instructions are not followed exactly, a
fire or explosion may result, causing property damage, personal
injury or death. Observe all precautions on tags, stickers, labels
and literature attached to this equipment.
2. Installation and service must be performed by a qualified installer
or service agency.
3. This unit is designed only for use with R-290 gas as the designated
refrigerant.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---
This equipment uses a flammable refrigerant. Installation, service
and repair should be done only by qualified and trained technicians in
accordance with this manual.
If a leak is detected, follow store safety procedures. It is the store’s
responsibility to have a written safety procedures in place. The safety
procedure must comply with all applicable codes such as local fire
department’s codes.
At minimum, the following actions are required:
• Immediately evacuate all persons from the store, and contact
the local fire department to advise them that a propane leak has
occurred.
• Call Hussmann and/or a qualified service agent and inform them
that a propane sensor has detected the presence of propane.
• Do not let any persons back into the store until the qualified
service technician has arrived and that technician advises that it
is safe to return to the store.
• The propane gas used in the unit has no odor. The lack of smell
does not indicate a lack of escaped gas.
• A hand-held propane leak detector (“snier”) should be used
before any repair and/or maintenance is attempted. All repair
parts must be identical models to the ones they are replacing.
• No open flames, cigarettes or other possible sources of ignition
should be used inside the building where the units are located
until the qualified service technician and/or local fire department
determines that all propane has been cleared from the area and
from the refrigeration systems.

ANSI Z535.5 DEFINITIONS
The definitions below are used to clarify the magnitude and urgency of
harm and damage, considering problems arising from misuse. Relative
to their potential danger, the definitions are divided into five parts
according to ANSI Z535 Series.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---
DANGER indicates a hazardous situation
which, if not avoided, will result in death or
serious injury.
WARNING indicates a hazardous situation
which, if not avoided, could result in death or
serious injury.
CAUTION indicates a hazardous situation
which, if not avoided, could result in minor or
moderate injury.
NOTICE is used to address practices not
related to personal injury.
SAFETY INSTRUCTIONS (or equivalent)
signs indicate specific safety-related
instructions or procedures.
REVISION HISTORY
REVISION H — DECEMBER 2022 - Added RLTW; redesigned manual
REVISION G — JULY 2021 - Revised Electronic Controller, Page 2-4 & 2-5
REVISION F — MARCH 2021 - Revised iso views, Page 2-7 & 2-9
REVISION E — FEBRUARY 2020 - Added additional warnings, Page 1-2
REVISION D — DECEMBER 2019 - Revised Section 2 pictures and wording; changed cover image
REVISION C — April 2019 - Added new medium temp. models
REVISION B — February 2019 - Added new low temp. models; updated Section 2
REVISION A — MARCH 2018 - Original Issue
This warning does not mean that Hussmann products will
cause cancer or reproductive harm, or is in violation of any
product-safety standards or requirements. As clarified by
the California State Government, Proposition 65 can be
considered more of a ‘right to know’ law than a pure product
safety law. When used as designed, Hussmann believes that
our products are not harmful. We provide the Proposition 65
warning to stay in compliance with California State law.
It is your responsibility to provide accurate Proposition 65
warning labels to your customers when necessary. For more
information on Proposition 65, please visit the California
State Government Website.
This warning does not mean that Hussmann products
will cause cancer or reproductive harm, or is in
violation of any product-safety standards or
requirements. As clarified by the California State
government, Proposition 65 can be considered more of
a‘right to know’ law than a pure product safetylaw.
When used as designed, Hussmann believes that our
products are notharmful. We provide the Proposition
65 warning to stay in compliance with California State
law. It is your responsibility to provide accurate
Proposition 65 warning labels to your customers when
necessary. For more information on Proposition 65,
please visit the California State government website.
August 31, 2018
HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
III
THE REFRIGERANT LOOP IS SEALED. ONLY A QUALIFIED
TECHNICIAN SHOULD ATTEMPT TO SERVICE!
• Propane is flammable and heavier than air.
• It collects first in the low areas but can be circulated by the fans.
• If R-290 is present or even suspected, do not allow untrained
personnel to attempt to find the cause.
• The propane gas used in the unit has no odor.
• The lack of smell does not indicate a lack of escaped gas.
• If a leak is detected, immediately evacuate all persons from the
store, and contact the local fire department to advise them that a
propane leak has occurred.
• Do not let any persons back into the store until the qualified
service technician has arrived and that technician advises that it
is safe to return to the store.
• A hand-held propane leak detector (“snier”) shall be used before
any repair and/or maintenance.
• No open flames, cigarettes or other possible sources of ignition
should be used inside the building where the units are located
until the qualified service technician and/or local fire department
determines that all propane has been cleared from the area and
from the refrigeration systems.
• Component parts are designed for propane and non-incendive
and non-sparking. Component parts shall only be replaced with
identical repair parts.
FAILURE TO ABIDE BY THIS WARNING COULD RESULT IN AN
EXPLOSION, DEATH, INJURY AND PROPERTY DAMAGE.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---

»Excessive ambient conditions may cause condensation and therefore sweating of doors. Facility operators should
monitor doors and floor conditions to ensure safety of persons.
»Case ventilation openings must be clear of any obstructions. Do not damage the refrigerant circuit.
»Always disconnect the electrical power at the main disconnect when servicing or replacing any electrical component.
This includes, but is not limited to, such items as fans, heaters, thermostats and lights.
»Do not use mechanical devices or other means to accelerate the defrosting process.
»Do not use electrical appliances inside the food storage compartments of the case(s).
»Do not store items or flammable materials atop the unit. Do not walk on case.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---
INSTALLATION TOOL LIST
Unloading From Trailer:
Lever Bar (also known as a Mule, Johnson Bar, J-bar,
Lever Dolly, and pry lever)
Moving Dolly
Setting Case Line-Up:
Level, 4 ft suggested
Ratchet
1/4 in. Socket
5/16 in. Socket
1/2 in. Socket
Battery Drill/Screw Gun
Caulking Gun
10 in. Adjustable Crescent Wrench
• Merchandiser must operate for 24 hours before
loading product!
• Regularly check merchandiser temperatures.
• Do not break the cold chain. Keep products in freezer
before loading into merchandiser.
• Medium temperature merchandisers are designed for
loading ONLY pre-chilled products.
• Low temperature merchandisers are designed for
loading ONLY frozen products.
CASE CLEARANCE
A 4-inch (102 mm) space between the rear of the merchandiser and
wall must be maintained for air circulation. However, in high ambient
conditions, sweating may still occur. If this happens install a method of
forced ventilation such as a fan ventilation kit.
HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3110586_C
IV
»Do NOT remove shipping crate until
the merchandiser is positioned for
installation.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---
AT TENTION

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
V
TABLE OF CONTENTS
BEFORE YOU BEGIN ................................................................ II
Safety Instructions .........................................................................ii
ANSI Z535.5 Definitions..................................................................iii
Revision History..............................................................................iii
Case Clearance ..............................................................................iv
Installation Tool List ........................................................................iv
TABLE OF CONTENTS .............................................................. V
INSTALLATION ........................................................................ 1-1
UL Listing.......................................................................................1-1
Federal / State Regulation ...............................................................1-1
Location.........................................................................................1-1
Shipping Damage ...........................................................................1-1
Exterior Loading .............................................................................1-2
Merchandisers Shipped with End Installed.........................................1-2
Shipping Braces..............................................................................1-2
Level Case and Place Shims ............................................................1-2
Door Adjustment ............................................................................1-3
Installing Splashguard Brackets .......................................................1-3
Case Joining...................................................................................1-3
Joining Instructions.........................................................................1-4
Installing Bumpers..........................................................................1-11
ELECTRICAL / CONTROLLER / WATER / REFRIGERATION. 2-1
Electrical........................................................................................2-1
Merchandiser Electrical Data............................................................2-1
Field Wiring....................................................................................2-1
Main Disconnect Switch...................................................................2-1
Plug ..............................................................................................2-2
Case Electronic Controller................................................................2-3
CoreLink Controller .........................................................................2-4
Control Operation ...........................................................................2-4
Water - (For Condensers) ................................................................2-6
Top Mounted Connections Water and Electrical ..................................2-7
System Balancing...........................................................................2-8
Automatic Balancing Valves .............................................................2-8
Pre-Installation System Cleaning .....................................................2-8
Refrigeration ..................................................................................2-9
Condensing Unit Access ..................................................................2-9
Compressor Safety .........................................................................2-10
Sequence of Operation: ..................................................................2-10
Defrost ..........................................................................................2-10
DRIP PIPING & SPLASHGUARDS ........................................... 3-1
Waste Outlet & Water Seal ..............................................................3-1
Installing Drip Piping.......................................................................3-1
Drip Piping Lineup Arrangements .....................................................3-3
Installing Splashguards ...................................................................3-3
Sealing Splashguards to the Floor ....................................................3-4
START UP / OPERATION......................................................... 4-1
Prior to Start-up Check List .............................................................4-1
Starting up the case .......................................................................4-1
Start Up and Operation ...................................................................4-2
12 Hours after Start Up Checklist .....................................................4-2
Stocking ........................................................................................4-3
Load Limits ....................................................................................4-3
Installing FDA/NSF required Thermometer........................................4-5
MAINTENANCE......................................................................... 5-1
Cleaning Honeycomb Assemblies .....................................................5-2
Cleaning Stainless Steel Surfaces.....................................................5-3
Cleaning Coils ................................................................................5-3
Cleaning Under Merchandisers.........................................................5-3
Removing Scratches from Bumper ...................................................5-3
SERVICE ................................................................................... 6-1
Before Beginning Any Service or Repair:...........................................6-1
Replacing Fan Motors and Blades .....................................................6-1
Replacing Electric Defrost Heaters ...................................................6-2
Replacing Drain Pan Heater .............................................................6-3
Servicing Vertical Lighting................................................................6-4
Servicing Doors and Frames ............................................................6-4
Replacing Door or Door Frame Parts.................................................6-4
Replacing Damaged Drain Fitting .....................................................6-4
Repairing Aluminum Coil .................................................................6-5

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-1
UL LISTING
These merchandisers are manufactured to meet ANSI/ UL 471
standard requirements for safety. Proper installation is required to
maintain the listing.
FEDERAL / STATE REGULATION
These merchandisers at the time they are manufactured, meet all
federal and state/ provincial regulations. Proper installation is required
to ensure these standards are maintained. Near the serial plate, each
merchandiser carries a label identifying the environment for which
the merchandiser was designed for use. In compliance with DOE
2017, standard low temp Reach In cases with Innovator I Doors are
equipped with an anti-sweat controller that maintains the door heat at
a level that meets DOE energy limits. Any factory or field-installed anti-
sweat controller applied to a low temp Reach In case with Innovator I
Doors must be programmed to cycle the heaters at no more than 50%
run time at design conditions of 75 degrees, 55% RH for frozen food
operating condition.
ANSI/NSF-7 Type I – Display Refrigerator / Freezer
Intended for 75°F (24°C) / 55%RH Ambient Application
ANSI/NSF-7 Type II – Display Refrigerator / Freezer
Intended for 80°F / 55%RH Ambient Application
ANSI/NSF-7 – Display Refrigerator
Intended for Bulk Produce
LOCATION
These merchandisers are designed for displaying products in air
conditioned stores where temperature is maintained at or below the
ANSI/NSF-7 specified level and relative humidity is maintained at or
below 55%.
Placing refrigerated merchandisers in direct sunlight, near hot tables or
near other heat sources could impair their eciency.
Like other merchandisers, these are sensitive to air disturbances.
Air currents passing around merchandisers will seriously impair their
operation. Do not allow air conditioning, electric fans, open doors or
windows, etc. to create air currents around the merchandisers. To
prevent sweating on the exterior surfaces of merchandisers, there
must be a minimum clearance of 4 inches (102 mm) between the
merchandisers and other fixtures or walls. Product should always be
maintained at proper temperature. This means that from the time
the product is received, through storage, preparation and display, the
temperature of the product must be controlled to maximize the life of
the product.
SHIPPING DAMAGE
All equipment should be thoroughly examined for shipping damage
before and during unloading. This equipment has been carefully
inspected at our factory. Any claim for loss or damage must be made
to the carrier. The carrier will provide any necessary inspection reports
and/or claim forms.
Apparent Loss or Damage
If there is an obvious loss or damage, it must be noted on the freight
bill or express receipt and signed by the carrier’s agent; otherwise,
carrier may refuse claim. The carrier will supply necessary forms.
Concealed Loss or Damage
When loss or damage is not apparent until after equipment is un-crated, a
claim for concealed damage is made. Upon discovering damage, make
request in writing to carrier for inspection within 15 days and retain all
packing. The carrier will supply inspection report and required claim
forms.
INSTALLATION

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-2
EXTERIOR LOADING
Do not walk on top of merchandisers or damage to the merchandisers
and serious personal injury could occur. They are not structurally
designed to support excessive external loading such as the weight of a
person. Do not store items or flammable materials atop the unit.
MERCHANDISERS SHIPPED WITH END INSTALLED
If the case was shipped with the end installed, two long bolts were
used to hold the shipping brace to the end. If the shipping bolts are
reinserted after removing the brace, they will extend into the product
area and may damage the coil. Therefore, be sure to replace these
bolts with the shorter bolts provided.
Be careful not to damage the factory-installed end while moving the
merchandiser. Make sure that tools are positioned past the end and
beneath the merchandiser’s support bar.
SHIPPING BRACES
Move the merchandiser as close as possible to its permanent location
and then remove all packaging. Check for damage before discarding
packaging. Remove all separately packed accessories such as kits and
shelves.
LEVEL CASE AND PLACE SHIMS
Begin lineup leveling from the highest point of the store floor.
Place shims under the rail and make sure that they are positioned at a
base component (crossbar). This transfers the weight directly from the
loaded case through to the floor.
Placing shims at other locations will cause uneven distribution of weight
leading to piping leaks, as well as sagging or wracked doors.
Bottom front supports must be shimmed if not in full contact with the
floor.
Front
Back
4-Door Shown
Shim
Here
Skid/External Base
Bottom Front Support
Electrical Wireway
Base Component
Shim Here
Approximately
Centered
Rear of Case
Base Component
Shim Here
Shim Here
It is the installing contractor’s
responsibility to consult
local agencies for local code
requirements.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-3
DOOR ADJUSTMENT
After leveling and joining the merchandisers, adjust and level doors
according to manufacturer’s instructions shipped with each product.
Factory settings may be lost due to vibration during shipment.
INSTALLING SPLASHGUARD BRACKETS
1. Attach splashguard retainer and splashguard retainer support to
splashguard support bracket using two screws per bracket.
2. Install splashguard support brackets underneath case. The leveling
brackets have a maximum extension of one (1) inch (25 mm) for
uneven floors.
Do not place shims under splashguard brackets.
NOTE
Install splashguard support brackets before piping case.
CASE JOINING
Sectional construction means that two or more merchandisers may
be joined in line yielding one long continuous display requiring only
one pair of ends. Joining kits and instructions are shipped with each
merchandiser.
To join like fixtures, a joining kit is required. To join unlike fixtures, or
like fixtures operating at dierent temperatures, a 2 inch (51 mm)
partition kit is required. To join same temperature merchandisers on
dierent defrost cycles, a plexiglass partition kit is required.
All joints must be air-tight to prevent formation of ice or condensation.
Refer to the instructions on the next page.

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-4
Parts List
Item Quantity Description
(RL-W)
1. 2 Donut Gasket
2. 1 Gasket, .906 x 1/2x 200 in.
3. 1 Gasket,
1/2x 1/4x 600 in.
4. 8 Cap Screw 5/16 -18 x 1 1/4
5. 8 Split Lock Washers 5/16
6. 1 Joint Molding
7. 5 Binder Post and Screw
8. 1 Splice Connector
JOINING INSTRUCTIONS NOTE
Be sure first merchandiser has been leveled according to the main
installation instruction. Carefully unpack and inspect the joining parts
listed above to verify completeness and that there is no damage.
1Prepare cases for joining as shown in Figure 1.
A. Packing materials, bumpers and splashguards should be
removed.
B. Remove shelves (if installed).
C. Remove display racks and pans from ends to be joined.
D. Remove plenum covers.
Splashguard brackets must be installed
before piping or wiring case.
B
A
CD
E
Prepare Cases
Bumper
Bumper
Retainer
Splashguard
SIDE VIEW
A
C
Bumper
Bumper
Retainer
Splashguard
SIDE VIEW

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-5
E. Remove back panels from
ends to be joined by lifting
up and out near the bottom.
No tools are necessary.
F. Remove joint molding from
any door frames that will be
joined to another case.
G. RLNI Only: Remove screws
and interior top panel on
both sides of the island
case end to be joined (see
Figure 1).
E
G
RLNI & RLNI
Alignment Pin
F
E
RL CASE
G
2
Locate and remove the shipping block in the center of the heat
exchanger in the interior bottom of each case, see Figure 2.
Snap a chalk line on the floor to use as a guide for positioning the
front of the cases in the line-up. The front base frame should be
on the chalk line.
3 Once cases are close to final placement, remove the shipping
braces from the ends to be joined, see Figure 3. Discard bolts and
flat washers used to hold shipping braces. Bolts are too long to be
used for joining.
RMN
Remove Shipping Braces
Do not use shipping bolts to join cases!
Shipping
Brace
Remove Shipping Block
(One From Each
Side of Island Models)
Shipping
Block
RLNI / RLNI

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-6
4
If not already
installed make sure
Nut Retainers and
Alignment Pins are in
place in the right end
frame as shown in
Figure 4A or 4B.
Figure 4A. Verify Nut Retainer Installation
RL / RLN
Alignment Pin
RLNI
Factory
Installed Nut
Retainer
Alignment Pin Alignment Pin
5Apply Donut Gasket – 1 in
recess around both left end
as shown in Figure 5A, Part 1;
5B or 5C, Part 1, and right end
frames as shown in Figure 5A,
Part 2; 5B or 5C, Part 2.
Apply the wider Foam Tape
Gasket — 2 around the right end
frame as shown in Figure 5A, Part
2, 5B or 5C, Part 2.
Figure 5A, Part 1. Apply Gasket to Left End
RL / RLN
F
R
O
N
T
Right EndLeft End
F
R
O
N
T
PadShoeSealer
1- Donut
2- 1 in x in
3- in x in
Use all three gaskets
When applying an end
assembly.
Left End Case
F
R
O
N
T
Right EndLeft End
F
R
O
N
T
PadShoeSealer
1- Donut
2- 1 in x in
3- in x in
Use all three gaskets
When applying an end
assembly.
Left End Case
Right End Case
F
R
O
N
T
Right EndLeft End
F
R
O
N
T
PadShoeSealer
1- Donut
2- 1 in x in
3- in x in
Use all three gaskets
When applying an end
assembly.
1
1 - Donut

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-7
Apply gasket pad to right end first, then apply the
narrower Foam Tape Gasket — 3 around the perimeter of
the right end frame outside of the donut gasket as shown in
Figure 5A, Part 2, 5B or 5C, Part 2.
• Lap gaskets at lower corners.
• Check that there are no gaps between gasket
and case.
• Do not stretch gasket, especially around
corners.To make sharp corners, paper backing
can be torn without removing from gasket.
• Do not butt gaskets; always lap joints.
• Remove paper backing after gasket is applied to
keep gasket free of debris.
• Gasket has high tack adhesive and must be
properly placed the rst time.
Overlap
Gasket
Gasket Pad
F
R
O
N
T
Right End
Le End
F
R
O
N
T
/ / / / / / /
/////////////////////////////
2
3
/////////////////////////////
Detail D
1
Overlap
Foam Gasket 3
as Shown
/////////////////////////////
1
2
3
/////////////////////////////
Detail A
/ / / / / / / /
/////////////////////////////
1
2
3
Donut Gasket
Foam .906 inch x 1/2 inch x 200 inch
Foam 1/2 inch x 1/4 inch
Right End
Case-to-Case
Joint or End Panel
Apply Donut Gasket,
Foam Gaskets
and Gasket Pad to
Right End Only
Apply Gasket Pad
2
Detail C
Install Donut
Gasket
(seat into groove)
Left End
Only Use
Donut Gasket on
left end of
a Case-to-Case
Joint
If attaching an End
Panel, all 4 Gaskets
must be applied.
1. Butyl is NOT an acceptable
substitute for donut or foam
gasket.
Gasket
Pad
Overlap Foam
Gasket As
Shown
DETAIL A
Right End
Left End
Foam 1/2 inch x 1/4 inch
Donut Gasket
Foam .906 inch x 1/2 inch x 200 inch
Install Donut
Gasket
(seat into groove)
Left End
Only Use Donut Gasket on
left end of a Case-to-Case
Joint
If attaching an End Panel, all
4 Gaskets must be applied.
Right End Case-to-Case
Joint or End Panel
Apply Donut Gasket,
Foam Gaskets and
Gasket Pad to Right End
Only
Apply Gasket Pad
Detail C
Make sure area where raceway attaches to end
frame is sealed with the wider 1 in. x 1/2in. gasket.
F
R
O
N
T
RL / RLN
Apply Gaskets to Right End
F
R
O
N
T

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-8
RLNI / RLNI
Left End Case
Gasket
Pad
Donut
Gaskets
Must Be
Applied
As
Shown
1 in. x in.
in. x in.
Apply Gaskets to Right End
RLNI / RLNI
Right End Case
Gasket
Pad
Donut
1 in. x 1/2in.
1/2in. x 1/4in.
Gaskets Must
Be Applied As
Shown
Make sure area where raceway
attaches to end frame is sealed
with the wider 1 in. x 1/2in. gasket.
Apply Gaskets

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-9
6
Move the second merchandiser
against first, mating alignment
pins with corresponding holes.
Use care when pushing the
cases together.
RL / RLNI: Do not cut wires
routed along the front bumper
retainer. See detail in Figure 6.
RL or RM
RLN or RMN
RLNI
Do not cut wires in
bumper retainer.
7Loosely insert Cap Screw – 5 with Lock Washer – 6 into each nut
retainer following the sequence shown in Figure 7A. Do not tighten fully.
A. Fasten bottom fronts together, but tighten only until front panels touch.
B. Move to the bottom back position and join (2 places).
C. Join at the top front position.
D. Go to the middle back wall position and join.
E. Join at the lower back wall.
F. Finally, join at the top back wall position.
Following the same sequence, tighten each cap screw fully until the
merchandisers are joined with a snug fit and gaskets are compressed.
8Refer to Section 1 of the Reach-In Installation and Service Manual
to install splashguard brackets and bumpers. Section 3 provides
direction for installing splashguards, including splashguard Splice
Connector – 8.
Move Cases Together
Joining Sequence
RL / RLN
Nut Retainer
Alignment Pin

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-10
A
RLNI
A
E
B
6
5
F
D
C
Alignment Pin Alignment Pin
Nut Retainer
RLNI / RLNI
Joining Sequence for RLNI-W Cases
Alignment
Pin
Alignment
Pin
Nut Retainer
9
Align holes in frame with holes in Joint Molding – 6. Fasten cases
together using Binder Post and Screws – 7 as shown in Figure 8.
10
Refer to Section 1 of the Reach-In Installation and Service
Manual to install splashguard brackets and bumpers. Section
3 provides direction for installing splashguards, including
splashguard Splice Connector – 8. shown in Figure 9.
6
7
7
6
Installing “J” Molding
Installing Splashguard Splice Connector
Splice Connector
Splashguard
SIDE VIEW
9
Splashguard
Splice
Connector
Side View

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
1-11
INSTALLING BUMPERS
Osetting the bumpers and top rails helps to disguise the joint
locations, giving the lineup a smoother look.
Begin at the left end of the line-up. A starter bumper is factory-installed
with end kits. Insert the internal joint trim, then add the full-length
bumper.
Align each bumper section with its retainer and push into place,
working from the end of the lineup. Install full length bumpers and
internal joint trims oset across joints. Make sure that no gaps exist
between sections. Continue installing bumpers the length of the line up.
Do NOT install the last bumper sections at this time. These sections will
be installed in the last step.
Once all except the last section of bumper have been installed,
refrigerate the case line-up for at least six (6) hours. The last sections
of bumper should be kept inside a refrigerated case or cooler during
this time to allow the bumpers to contract.
Before installing the last full-length section, measure the remaining
space. Use a miter box and fine-tooth saw to cut last bumper to length.
Install the last section. Remove protective film from bumpers once
installation is complete. Optional end bumpers are factory-installed
Bumper End Caps can be adjusted
horizontally to eliminate gaps.
Merchandiser
Joint
Merchandiser Joint
Internal Joint
Trims
Starter
Bumper
Full Length
Bumpers
Bumper
Miter Box

HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
2-1
ELECTRICAL
These self-contained merchandisers have watercooled condensers. The
evaporator coil is divided into two separate circuits that each have a
dedicated refrigeration system. For Reach-In cases, the condensing unit
is located on top of the case.
These merchandisers are controlled by the CoreLink Controller.
Cases may be installed as standalone cases with ends, or as part
of a lineup. For lineups; Hussmann recommends that the cases be
connected to a gateway for defrost coordination, or that partitions are
installed between individual cases to prevent frost buildup and other
problems that may result from dierent defrost schedules.
MERCHANDISER ELECTRICAL DATA
Refer to merchandiser serial plate or case data sheets for electrical
information.
FIELD WIRING
Field wiring must be sized for component amperes stamped on the
serial plate. Actual ampere draw may be less than specified.
ALWAYS CHECK THE SERIAL PLATE FOR COMPONENT AMPERES.
MAIN DISCONNECT SWITCH
Cases are equipped with a main disconnect switch. The switch will
interrupt power to the entire case. The switch is located in the electrical
box on top of the case, right side when facing the front of the case. The
switch is positioned towards the rear of the case. The following image
shows the disconnect switch.
The disconnect switch must be turned OFF before servicing the
merchandiser(s).
TITLE PAGE
2-1
Disconnect
Switch
Disconnect
Switch
ELECTRICAL / CONTROLLER / WATER / REFRIGERATION
»Due to risk of ignition resulting from incorrect parts or
improper service, only Hussmann authorized personnel
may service this equipment. Component parts shall be
replaced only with exact manufacturer and model number
components. Failure to use authorized technicians could
result in An explosion, death, injury and property damage.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---

— LOCK OUT / TAG OUT —
»Merchandiser must be grounded. All wiring must be in
compliance with NEC and local codes.
»To avoid serious injury or death from electrical shock,
always disconnect the electrical power at the main
disconnect when servicing or replacing any electrical
component. This includes, but is not limited to, such items
as doors, lights, fans, heaters, and thermostats.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---
HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
2-2
These self-contained merchandisers have water-cooled condensers.
Each coil section has a dedicated refrigeration system.
All the electrical connections are to be made in the electrical box,
located on top of the case at the right side.
PLUG
The optional plug cord is 8ft long and is located on the right hand rear
of the merchandiser. Disconnect power before servicing. Merchandisers
require a dedicated electrical circuit with ground. 12AWG is the
minimum sized acceptable wire for a 20-amp circuit.
• 2, 3 and 4-door cases require a dedicated 20-amp / 208V - 3 phase circuit
with a grounded wall receptacle (NEMA L21-20R).
• 5-door cases require a dedicated 30-amp / 208V - 3 phase circuit
with a grounded wall receptacle (NEMA L21-30R).
• RM-W & RMN-W cases require a dedicated a NEMA 5-15R
grounded wall receptacle.
• Always use a dedicated circuit with the amperage stated
on the unit.
• Plug into an outlet designed for the plug.
• Do not overload the circuit.
• Do not use long or thin extension cords. Never use
adapters.
• If in doubt, call an electrician.
NEMA L21-20R
2-2
Water Inlet
Water Outlet
Water Line Assembly Inlet
Water Line Assembly Outlet
Water System Bracket
Condensing Unit
Front of Case
2-4
Condensing Unit
Water System Bracket
Water Line Assembly Inlet
Front of Case
Water Line Assembly Outlet
NEMA L21-30R
NEMA 5-15R
It is the installing contractor’s
responsibility to consult
local agencies for local code
requirements.
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
--`,,,``,,,``,``,``,`````,`,``,-`-`,,`,,`,`,,`---

IMPORTANT!
Disconnect electrical power before beginning any service on electrical
or electronic equipment. DO NOT work around live electrical circuits.
Make sure the machine is switched o before working on electrical
connections. All operations must be carried out by qualified personnel.
Check that the supply voltage is correct before connecting devices.
Never use power that diers from that indicated in the manual.
Power supplies other than those specified can seriously damage the
refrigeration system or other components and parts.
Separate the cables of the analogue inputs from those of the digital
input and the serial line cables from the power cables (resistive as well
as inductive), in order to prevent malfunction due to electromagnetic
interference.
All system components should be obtained from Hussmann to ensure
system compatibility and reliability.
Make connections as short as possible, and do not wind them around
electrically connected parts. When connecting loads, follow connection
diagrams carefully.
Never connect the secondary of the supply transformer to the earth.
The low voltage connections must have reinforced insulation.
When using the digital inputs of the CoreLink Case Controller use
another transformer in order to prevent the digital inputs from
malfunctioning or being damaged.
To avoid causing static discharge, do not touch the electronic
components on the boards.
DO NOT use the same secondary of the controllers power. Doing so
can result in damage to case controller.
DO NOT exceed the maximum current capacity of the onboard
controller relays. Always verify the capacity of the output used.
DO NOT plug in accessory devices that are not approved by
Hussmann.
DO NOT exceed the maximum current capacity of the onboard
controller relays.
Always verify the capacity of the output used.
DO NOT plug in accessory devices that are not approved by
Hussmann.
GND is Common(-), not earth ground. Do not earth ground this device.
Permitted Use
→ Food Display Merchandisers
→ Coolers
→ Self-Contained
→ Remote Cases
Improper Use
→ HVAC
→ Unspecified Installation
→ Deviation from established Legislation and Standards
Hussmann is not responsible for misuse or device. Hussmann is not
held responsible for deviation from this manual and its intended use.
If you have any questions, contact your Hussmann representative for
details.
In case of failure or faulty operation, send the controller back to the
distributor with a detailed description of the fault.
The controller should not be used for purposes dierent from those
described in this manual. It cannot be used as a safety device.
HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
2-3
CASE ELECTRONIC CONTROLLER
ANSI Z535.6-2011 (R2017)
Page 18
©2017 National Electrical Manufacturers Association
Annex A
Providing Information About Safety Messages in Collateral Materials and Product
Safety Signs and Labels
(Informative)
A1 Explanation of Signal Words and Symbols
Signal words and safety symbols that are used in a product’s collateral materials or on the product may
be defined in collateral materials if space is available.
A1.1 Safety Alert Symbol
The meaning of the safety alert symbol may be provided in collateral materials. The following artwork may
be used for this purpose.
This is the safety alert symbol. It is used to alert you
to potential physical injury hazards. Obey all safety
messages that follow this symbol to avoid possible
injury or death.
A1.2 Signal Words
The meaning of the different signal words as defined by the ANSI Z535.6 and ANSI Z535.4 standards
may be explained in collateral materials. The following artwork may be used for this purpose.
DANGER indicates a hazardous situation which, if not
avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not
avoided, could result in minor or moderate injury.
NOTICE is used to address practices not related to
physical injury.
Safety instructions (or equivalent) signs indicate specific
safety-related instructions or procedures.
A1.3 Other Highlighting Conventions
The meaning of any other highlighting conventions used to differentiate safety messages (e.g., text
manipulations, indention, etc.) may be explained in collateral materials.
A1.4 Safety Symbols
The meaning of any safety symbols used on safety labels or collateral materials may be explained in
collateral materials.
Copyright National Electrical Manufacturers Association
Provided by IHS Markit under license with NEMA
Licensee=Hussmann Corp/8160899001, User=Trevett, Jason
Not for Resale, 02/16/2021 11:49:55 MST
No reproduction or networking permitted without license from IHS
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HUSSMANN CORPORATION • U.S. & CANADA 1-800-922-1919 • BRIDGETON, MO 63044-2483 • MEXICO 1-800-890-2900 • WWW.HUSSMANN.COM • PN 3053328_H
2-4
CORELINK CONTROLLER
Reach-In self-contained R-290 cases are
controlled by a CoreLink Electronic Controller,
for refrigeration and defrost control and control
of lights and fans. The controller is factory
programmed with the required parameters to
safely operate the merchandiser and maintain
required product temperature. There is no need
to make adjustments to the controller, however, it
is recommended that the program be checked at
startup. Refer to the display case data sheet for
discharge air temperature, setpoint, defrost cycle
and other information.
CONTROL OPERATION
The case temperature is controlled by cycling the compressor ON and
OFF based on the discharge air temperature. On 4- and 5-door cases,
the separate refrigeration systems are both controlled by one CoreLink
controller that cycles both compressors based on the temperature
sensor located above the discharge air honeycomb at the center of the
case. The second compressor has a 5 second delay at each startup to
prevent excessive startup current.
The discharge air temperature is factory set for -3°F for low
temperature cases, and 37°F for medium temperature cases.
There are two methods for accessing CoreLink: The wireless connection
kit directly at the CoreLink hosted by Web UI on a connected smart
device, or users can use Building Automated System (BAS) to change
parameters from a single, central location. For explanation of wireless
connection at the case, consult the CoreLink user manual under Web
User Interface Section.
NOTE:
Individual cases may be designed to run at a specific temperature
setting and may not perform well at lower or higher settings,
depending on such things as condenser water temperature, ambient
conditions, etc.
Defrost is time-initiated, and is programmed with the correct number
of defrosts per day and the correct termination. Low temperature cases
are temperature terminated at 48°F based on a sensor mounted on
the left end of the evaporator coil. The start time for defrost must be
programmed using BAS.
Additional Safeties
CoreLink incorporates additional safeties to protect the case from
critical failures in an MDS installation. These safeties may, or may not
be installed, depending on case model. The following safeties protect
the compressors and generate an alarm in the event of water system
failure, refrigerant loss, or blockage of the refrigeration system. Some
or all of the safeties are enabled depending on the case model.
The following safeties protect the compressors in the event of
refrigerant loss, water system failure, or any other blockages of the
heat exchanger. These safeties will be displayed as an alarm on the
CoreLink WebUI, and the compressor will shut o. Depending on the
severity and length of time of the alarm condition, the CoreLink alarm
may cause the compressor to lock out and not re-start, and the alarm
will need to be cleared after the cause of failure is diagnosed and
repaired. Instructions to clear the alarm and re-start the compressors
will be given in the Diagnosis > Fault Sequence > Fault Code (Click
on link for Fault Details popup). In general though, a reboot of the
controller once the failure mode is discovered and repair will clear the
lockout.
Compressor Discharge Temperature Safety
The controller will alarm and disable the compressor output until the
temperature falls below threshold.
Compressor Pressure Safety Switch
The controller will disable compressor output when the pressure safety
switch is activated. Compressor will resume operation when the safety
switch is deactivated.
Compressor Run-time Safeties
Additional run-time safeties are incorporated to protect the compressor
and MDS products.