Hussmann SHM Series User manual

SHM
Medium Temperature Self Contained
Specialty Horizontal Merchandiser
Installation &
Operation
Manual
P/N 0515258_N
June 2018
IMPORTANT
Keep in store
for future reference!
Spanish 0531303
French 0531304
MANUAL- I/O SELF-CONTAINED SHM
Shown with 3-sided Bumper
®
Æ

P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
ii
IMPORTANT
KEEP IN STORE FOR FUTURE REFERENCE
Quality that sets industry standards!
12999 St. Charles Rock Road • Bridgeton, MO 63044-2483
U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900
www.hussmann.com
© 2018 Hussmann Corporation

P/N 0515258_N iii
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
ANSI Z535.5 DEFINITIONS .......... vi
INSTALLATION
Certification ........................ 1-1
Hussmann Product Control ........... 1-1
Shipping Damage ................... 1-1
Location ........................... 1-1
Self Contained Location .............. 1-2
Model Description .................. 1-3
Unloading ......................... 1-3
Exterior Loading .................... 1-3
Shipping Skid ...................... 1-3
Merchandiser Leveling ............... 1-4
Optional Legs ...................... 1-4
Serial Plate Location ................. 1-4
Refrigeration Unit Access ............. 1-4
Sealing Merchandiser to Floor ......... 1-4
Optional Night Curtain ............... 1-5
Self-Contained Refrigeration Equipment
Start Up Check List ................. 1-7
ELECTRICAL / REFRIGERATION
Merchandiser Electrical Data .......... 2-1
Field Wiring ........................ 2-1
Electrical Connections . . . . . . . . . . . . . . . . 2-1
Electrical Outlet ..................... 2-1
Refrigeration (Self Contained) ......... 2-1
Waste Outlet and Water Seal .......... 2-2
START UP / OPERATION
Controller Operation ................. 3-1
Key Function ....................... 3-2
Further Information ................. 3-3
Connections ........................ 3-4
LED .............................. 3-5
KDE PLUS Buttons ................. 3-6
Setpoint ........................... 3-7
Sensor to Control Configuration........ 3-8
Controls Adjustments ................ 3-9
Start Up .......................... 3-10
Load Limits ....................... 3-10
Stocking .......................... 3-10
Thermometer ...................... 3-10
MAINTENANCE
Care and Cleaning ................... 4-1
Cleaning Discharge Honeycomb ....... 4-2
Cleaning Stainless Steel Surfaces ....... 4-2
Cleaning Under Step Pan ............. 4-2
Cleaning Thermometer ............... 4-3
Cleaning Coils ...................... 4-3
Cleaning Evaporation Pan ............ 4-4
Removing Scratches from Bumper ...... 4-4
Maintaining Fluorescent Lamps ........ 4-4
SERVICE
Replacing Fan Motors and Blades ...... 5-1
Replacing Lights .................... 5-2
Replacing Ballast / Power Supply ....... 5-2
APPENDIX
Part Numbers ..................... A-1
Plan View & Dimensions ............. A-4
Cross Section View & Data .......... A-5
Electrical Data & Product Data ....... A-6
Electrical Cont. & Shipping Weight .... A-7
SHM Self Contained Case Wiring ..... A-8
WARRANTY
TABLE OF CONTENTS

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iv
REVISION HISTORY
REVISION N — Page 3-8 removed sensor wire color
REVISION M
1. Page 1-4 - Replaced image of the display & cable
-Replaced display picture
2. Page 3-1 to 3-5-Remove Safe-NET Controller
Information
3. Page 3-6 -Replaced pictures with coil to ctrl
4. Page 3-7-Change Defrost Frequency from 2 to 3
-Change Temp Termination from 52 to 48
-Change Controller info on first paragraph to controller
-Remove word knob
5. Page 3-8 -Changed controller information
6. Page A-1-Removed selected components -Add
Controller parts
7. Page A-3 -Replaced SNIII with “Ctrl Display” on
291431 & 291432 descriptions
8. Page A-5 -Remove selected information; On Defrost
Data Change Frequency from 12 to 8 and Defrost
Termination from 52 to 48
9. Page A-8/A-9-Replaced diagrams with new revisions
REVISION L
Removed; For USA/CANADA, a Hi-Humidity
Condensate Pan Kit is provided with SHM-3;
Revised Part Numbers, Page A-1 and Condensate
Pan numbers on, Page A-2. Change fuse Amps 30
15, Page A-7; new wiring diagram, Page A-8
REVISION K
NEMA Plug, 2-1; Condensate Pan Note, 2-2; New Part,
A-2; Updated tables, A-5; Updated tables, A-6; Updated
table A-7; Updated Wiring Diagrams, A-8
REVISION J
Revised Parts List, A-2; Revised Wiring Diagram, A-8
A-9; Shipping Weight, Page A-7
REVISION H
Revised Refrigeration Charge, A-5
REVISION G — Note on cover page. Removed model
SHM-4BW, Page 1-2, Added California Prop 65 Warning,
Page 1-2 Updated Night Curtain Instructions, Page 1-5
Added New Parts List, Page A-1
REVISION F — Added Checklists Page 1-7; Added
Warning Page 1-3; Cleaning Coils 4-3; Maintaining
Fluorescent Lights 4-4. Checklist Page 4-5
REVISION E— JULY 2013
1. Included Night Curtain Installation Instructions
Page 1-5 and 1-6
REVISION D— FEBRUARY 2012
1. Changed NEMA plug
2. Removed Remote Case setup instructions
REVISION C— JANUARY 2012
1. Added LED Light Bars
2. Removed Remote Models
3. New Wiring Diagram SHM-3, SHM-4
REVISION B — DECEMBER 2010
1. Revised defrost settings, Page 3-3
2. Changed Defrost Frequency (2); Page 3-7
3. Revised defrost settings; Page A-3
ORIGINAL ISSUE — NOVEMBER 2010
* * * * * * * * * * * * * * * * * * * * * * * * * *
ANSI Z535.5 DEFINITIONS
• DANGER – Indicate[s] a hazardous
situation which, if not avoided, will
result in death or serious injury.
• WARNING –Indicate[s] a hazardous
situation which, if not avoided, could
result in death or serious injury.
• CAUTION –Indicate[s] a hazardous
situation which, if not avoided, could
result in minor or moderate injury.
• NOTICE – Not related to personal injury –
Indicates[s] situations, which if not avoided,
could result in damage to equipment.

P/N 0515258_N 1-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
UL LISTING
These merchandisers are manufactured to meet
ANSI/ UL 471 standard requirements for safe-
ty. Proper installation is required to maintain
the listing.
FEDERAL / STATE REGULATION
These merchandisers at the time they are man-
ufactured, 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. A Type II
fan speed control kit is required for each mer-
chandiser to operate at Type II conditions.
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
HUSSMANN PRODUCT CONTROL
The serial number and shipping date of all
equipment is recorded in Hussmann’s files
for warranty and replacement part purposes.
All correspondence pertaining to warranty or
parts ordering must include the serial number
of each piece of equipment involved. This is to
ensure the customer is provided with the cor-
rect parts.
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.
Concealed Loss or Damage
When loss or damage is not apparent until
after equipment is uncrated, retain all packing
materials and submit a written response to the
carrier for inspection within 15 days.
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 efficiency. Like
other merchandisers, these merchandisers 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
merchandiser.
INSTALLATION
Recommended operating ambient
temperature is between
65°F (18°C) to 75°F (23.9°C).
Maximum relative humidity is 55%.

1-2 INSTALLATION
P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
SELF CONTAINED LOCATION
Product should always be maintained at prop-
er 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.
Besure to position self contained
merchandisers properly.
SELF CONTAINED models have vented base
panels to allow air circulation through the
condensing unit.
See illustrations for clearances distances from
walls, merchandisers, and any other large
objects near the merchandiser’s vented base
panels. Blocking or restricting air flow will
adversely affect performance and may damage
the refrigeration system.
This product may contain chemicals known
to the State of California to cause cancer,
birth defects, or other reproductive harm.
This warning is the result of the California State
law known as the California Safe Drinking Water
and Toxic Enforcement Act of 1986, which is
commonly referred to as “Proposition 65.”
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 claried 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.
For California Businesses:

P/N 0515258_N 1-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
MODEL DESCRIPTION
SHM merchandisers offer versatility for the
display of food items such as: fresh fruit,
vegetables, cheeses and other delicatessen
items. Carefully read and follow the instruc-
tions prior to operating the merchandiser.
UNLOADING
Unloading from Trailer:
Lever Bar (also known as a Mule, Johnson
Bar, J-bar, Lever Dolly, or Pry Lever)
Move the merchandiser as close as possible to
its permanent location and remove all packaging.
Check for damage before discarding packaging.
Remove all separately packed accessories such
as kits and shelves.
Improper handling may cause damage to the
merchandiser when unloading. To avoid dam-
age:
1. Do not drag the merchandiser out of the
trailer. Use a Johnson bar (mule).
2. Use a forklift or dolly to remove the
merchandiser from the trailer.
EXTERIOR LOADING
Do NOT walk on top of merchandisers or
damage to the merchandisers and serious
personal injury could occur.
merchandisers are not structurally
designed to support excessive external
loading such as the weight of a person. Do
not place heavy objects on the merchandiser.
SHIPPING SKID
Each merchandiser is shipped on a skid to
protect the merchandiser’s base, and to make
positioning the case easier.
Do not remove the shipping skid until the
merchandiser is near its final location. The
skid provides protection for both the merchan-
diser and the floor.
Remove the skid by raising one end of the
merchandiser approximately 6 inches. Block the
merchandiser securely, and remove the two skid
bolts from the raised end. Replace the bolts
with (provided) leg levelers. Repeat this proce-
dure at opposing end. Once the leg levelers are
secured in place, the merchandiser may be slid
off the skid and placed in its final location.
DO NOT TILT MERCHANDISER ON ITS
SIDE OR END WHEN REMOVING SKID.
Once the skid is removed, the merchandiser
must be lifted —NOT PUSHED— to reposition.
Check floor where merchandisers are to be set
to see if it is a level area. Determine the highest
part of the floor.
Do NOT remove shipping crate until the
merchandiser is positioned
for installation.
Do NOT stand or walk on top of
merchandiser. Do not store items or
ammable materials atop the unit.

1-4 INSTALLATION
P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
MERCHANDISER LEVELING
Besure to position merchandisers proper-
ly. Level the merchandiser by all four corners.
Merchandiser(s) must be installed level to
ensure proper operation of the refrigeration
system, and to ensure proper drainage of
defrost water. Optional leg levelers can be
provided for this purpose.
OPTIONAL LEGS
NSF® approved legs replace the leg levelers if
required by local health codes. The legs raise
the case 6 inches for cleaning purposes. An
optional skirt kit can be provided to snap on
the legs.
SERIAL PLATE LOCATION
The serial plate is located on the interior left
wall of the merchandiser. It contains all perti-
nent information such as model, serial number,
amperage rating, refrigerant type and charge.
This information will be needed to install, service
or order parts for the merchandiser.
REFRIGERATION UNIT ACCESS
The lower access panel may be removed by
lifting the panel straight upward and over the
screws on which it is hanging. The panel is
installed by reversing the above procedure.
Ensure lower access panel is flat against the
floor when installed to prevent air circulation
problems on self contained merchandisers.
Display is mounted on left
side of access panel. Be
careful not to detach cable
from display when removing
access panel.
SEALING MERCHANDISER TO FLOOR
If required by local sanitary codes, or if the
customer desires, merchandisers may be sealed
to the floor using a vinyl cove base trim. The
size needed will depend on how much varia-
tion there is in the floor, from one end of the
merchandiser to the other. Sealing of the lower
front and rear panels on self contained mod-
els may hamper their removal for servicing or
maintenance of the condensing unit.
NOTE: Do not allow trim to cover any intake
or discharge grilles located in the lower front
panel.
Serial Plate
Display
Lift up and
out to remove
access panel

P/N 0515258_N 1-5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
(OPTIONAL) NIGHT CURTAIN
Night curtains are used to cover the case opening
after normal business hours. The curtains
improve energy consumption, allowing the
refrigeration system to work less. Night
curtains ordered with the case are factory
installed.
PARTS LIST (per curtain)
Item Quantity Description
1. 1 Night Curtain
2. 3 Screw Phil Pan (#8)
3. 1 Clip bottom
1. Put night curtain on top panel,
one end of the will use to curtain
to fasten screw. Take a distance
1.50 inches to edge part end night
curtain. And center night curtain
to length case.
2. Use 3 Screw, Phil Pan, #8 X ½”
1.50 14.50 14.50
3.00

1-6 INSTALLATION
P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
3. Put clip in bottom, take to
reference access panel 2.00 inches
A
DETAIL A
2.00
3. Put clip in bottom, take to reference access
panel 2.00 inches

P/N 0515258_N 1-7
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
Hussmann Self-Contained Refrigeration Equipment Start Up Check List
***Please note that failure to follow this start-up document may void your factory warranty***
Form HSCW01 Rev. 30MAY12 P/N 0525209_B
Step Startup Activity Check
1 Locate, read and maintain install/operation manual in a safe place for
future reference.
2 Examine unit. Confirm there is NO damage or concealed damage.
3 Level the unit, side to side and front to rear.
4 Remove all shipping brackets/compressor straps/bolts etc.
5 Unit must be run on a dedicated electrical circuit without the use of
an extension cord.
6 Ensure that the proper electrical requirements for the equipment are
supplied.
7 Verify field electrical connections are tight.
8 Verify all electrical wiring is secured and clear of any sharp edges or
hot lines.
9 Verify the condensate drain line is properly trapped and pitched.
10 Verify all required clearances on the sides and back of unit.
11 Verify there are no air disturbances external to the unit. Heat and air
registers, fans, and doors etc.
Advise owner/operator that merchandiser must operate at temperature for 24 hrs prior to loading
with product.
LEGAL DISCLAIMER:
Hussmann shall not be liable for any repair or replacements made without the written consent of Hussmann, or when the product is installed or operated in a manner
contrary to the printed instructions covering installation and service which accompanied such product.

1-8 INSTALLATION
P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
NOTES:

P/N 0515258_N 2-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
MERCHANDISER ELECTRICAL DATA
Refer to Appendix A of this manual or the
merchandiser’s serial plate 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.
ELECTRICAL CONNECTIONS
All wiring must be in compliance with NEC
and local codes. All electrical connections (for
remote models) are to be made in the electrical
Handy Box located behind the removable base
panel at the left end of the merchandiser when
facing the discharge air louver.
ELECTRICAL OUTLET
Before the merchandiser is connected to any
wall circuit, use a voltmeter to check that the
outlet is at 100% of the rated voltage. The wall
circuit must be dedicated for the merchandiser.
Failure to do so voids the warranty. Do not
use an extension cord. Never plug in more
than one merchandiser per electrical circuit.
• 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.
Self-contained models have factory-installed
power cords attached at the electrical box.
REFRIGERATION
(Self Contained Models)
Each self contained model is equipped with
its own condensing unit and control panel
located beneath the display area. The
merchandiser refrigeration piping is leak
tested. The unit is charged with refrigerant
and shipped from the factory with all service
valves open.
ELECTRICAL / REFRIGERATION
ALWAYS CHECK THE SERIAL PLATE FOR
COMPONENT AMPERES
— LOCK OUT / TAG OUT —
To avoid serious injury or death from electri-
cal 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.
Merchandiser must be grounded.
Do not remove the power supply cord ground.
Risk of Electric Shock. If cord or plug
becomes damaged, replace only with
a cord and plug of the same type.
NEMA 5-15R Receptacle

2-2 ELECTRICAL / REFRIGERATION
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REFRIGERATION
(Self Contained Models Continued)
SHM-3 self contained merchandisers use
R-404a refrigerant. SHM-4 self contained
merchandisers use R-134a refrigerant. All
models have a hermetic compressor. The
systems employ capillary tubes for refrigerant
flow control. The capillary tube is soldered
to the suction line pull-out coil for proper
heat exchange. If the capillary should become
plugged or damaged, it is best to replace the
heat exchanger.
WATER OUTLET AND WATER SEAL
The condensate water outlet is located in the
center of the merchandiser. The outlet has a
factory installed, external water seal.
For self contained models, this water seal
drains into the condensate evaporator pan
located beneath the merchandiser. The pan
uses a thermistor that senses water in the pan
and adjusts the amount of heat required to
evaporate the water. Ensure the drain hose
is properly trapped, and the drain area is not
clogged.
NOTE: All lower base panels must be in place
when the refrigerator is operating. If not, air-
flow from the condenser will be directed over
the evaporator pan and defrost water in the
pan may overflow.
Refrigeration lines are under pressure.
Refrigerant must be recovered before
attempting any connection or repair.
When brazing pipes, be sure to use the
insulation blanket shipped with the
merchandiser to prevent damage to the
metal merchandiser bottom.

P/N 0515258_N 3-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
START UP / OPERATION
CONTROLLER OPERATION
The electronic controller is located in the cas-
sette compartment. The controller comes factory
set, and is ready for use. The front grille must
be removed in order to access this control.
When removing the grille for this operation or
for condenser cleaning, care must be taken not
to damage the display interface cable. It may be
unplugged during this task.
1. Plug the merchandiser plug into its recepta-
cle.
a. The controller display will illuminate.
b. The interior light will illuminate.
2. After the control preprogrammed time delay
of up to 6 minutes, the compressor and evapo-
rator fan(s) will start if the control is calling for
cooling.
3. The control will cycle the compressor but
may also cycle evaporator fan(s) on and off
determined by the Set-Point and Differential
temperatures.
a. The Set-Point is the adjustable
preprogrammed temperature.
b. The Differential is the non-adjustable pre
programmed temperature.
c. The Control is designed to read and
display a cabinet temperature not a product
temperature.
This cabinet temperature may reect the re-
frigeration cycle of the Set-Point and it’s Dif-
ferential. The most accurate temperature on
a cabinets operation is to verify the product
temperature.
Taking as an example a VRL case, freezer, If
the Set-Point is -12°F and the Differential is
9°F. (Set-Point) -12°F + 9 (Differential) = -3°F.
The compressor and evaporator fan(s) will cycle
off -12°F and back on at -3°F.
Main Features:
• Panel-mounted
• Energy saving algorithms and optimised de-
frost control
• 8 preloaded applications
• Defrost at single / double evaporator
• Frame Heater
• Local network auto-conguration
• Direct load connection (up to 2 HP)
• Supply voltage control LVD
• Presence of an open collector output
RTN400 Page 17/130
KDEPLUS BUTTONS
The KDEPlus keyboard has 4 keys, as shown in the illustration:
1
2
3
4
Each key has a different function depending on whether it is:
• Pressed and released
• Pressed for at least 5 seconds
• Pressed and held at start-up
• Pressed in combination with another key.
KEYS
The following table summarizes the function of each key:
No Key Action
Pressed and released Press for at least 5 secs Start-up
1• Scrolls through menu items
• Decreases values
Activates the Manual Defrost function
(from outside menus). ---
2• Scrolls through menu items
• Decreases values
Function can be configured by the user
(from outside menus).
(see parameter H32)
---
3
• Returns to the previous menu
level
• Confirms parameter value
Activates the Stand-by function
(from outside menus). ---
4set
• Displays any alarms
(if active)
• Opens Machine Status menu
• Confirms commands
Opens the Programming Menu
(User and Installer parameters)
When pressed during
start-up it enables
the user to select the
application to be loaded.
STANDBY or ESC
DOWN SET
UP

3-2 STARTUP / OPERATION
P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
Key Functions:
• 2 ON/OFF regulators for HOT/COLD
• Single defrost and double evaporator
(heatings, modulated heaters, reverse cycle, hot gas)
• Evaporator fans and condenser fans
• Frame Heater
• AUX
• Light
• Door switch
• ON /OFF
• Deep cooling cycle
• Day / Night
• Diagnostics
• “Easy Map” programming
• Programmable inputs/outputs
• LINK2 local area network
• RS485 communication protocol: Modbus
• Compatible with Device Manager (DM)
• Compatible with Unicard and Multi-function key
RTN400 Page 7/130
2 - SPECIFICATIONS
TECHNICAL DATA
Classification: electronic automatic control (not safety) device for incorporation
Mounting: panel mounting
Type of action: 1.B
Pollution class: 2
Material class: IIIa
Overvoltage category: II
Nominal pulse voltage: 2500V
Temperature: Use: –5 … +55°C - Storage: -30 … +85°C
Power supply: SMPS 100-240Va ±10% 50/60 Hz
Power consumption: 5.5W max
Fire resistance category: D
Software class: A
RTC battery life: In absence of external power, the clock battery will last 3 years.
FURTHER INFORMATION
INPUT CHARACTERISTICS
Measurement range: NTC: -50.0°C ... +110°C; PTC: -55.0°C ... +150°C; PT1000: -60.0°C ... +150°C
(on 3-digit display with +/- sign)
Accuracy: ±1.0° for temperatures below -30°C
±0.5° for temperatures between -30°C and +25°C
±1.0° for temperatures above +25°C
Resolution: 1 or 0.1°C
Buzzer: NO
Analogue/Digital Inputs: 5 configurable NTC/PTC/PT1000/DI inputs
1 multi-function, voltage-free digital input (D.I.)
OUTPUT CHARACTERISTICS
Digital Outputs: OUT1: 1 SPST relay: 2HP max 240Va
OUT2: 1 SPDT relay: 1HP max 250Va
OUT3: 1 SPDT relay: 8(4)A max 250Va
OUT4: 1 SPST relay: 8(4)A max 250Va
OC (Open Collector) Output: OC: 1 multifunctional output: 12Vc 20mA
MECHANICAL CHARACTERISTICS
Dimensions: 121x92 mm
Terminals: faston and screw for wires with cross-section of 2.5mm2
TTL for Unicard / Device Manager connection (via DMI)
Usage / Storage: 10...90% RH (non-condensing)
Connectors:
Humidity:
REGULATIONS
Electromagnetic compatibility: The device complies with Directive 2004/108/EC
Safety: The device complies with Directive 2006/95/EC
Food Safety: The device complies with standard EN13485 as follows:
• Suitable for storage.
• Application: air.
• Climate range A
• measurement class 1 in the range from -25°C to 15°C (*)
(* with Eliwell probes only)
NOTE: The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer to
the instrument alone and not to any accessories provided, such as the probes.
This means, for example, that the error introduced by the probe must be added to the error of the instrument.

P/N 0515258_N 3-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
RTN400 Page 7/130
2 - SPECIFICATIONS
TECHNICAL DATA
Classification: electronic automatic control (not safety) device for incorporation
Mounting: panel mounting
Type of action: 1.B
Pollution class: 2
Material class: IIIa
Overvoltage category: II
Nominal pulse voltage: 2500V
Temperature: Use: –5 … +55°C - Storage: -30 … +85°C
Power supply: SMPS 100-240Va ±10% 50/60 Hz
Power consumption: 5.5W max
Fire resistance category: D
Software class: A
RTC battery life: In absence of external power, the clock battery will last 3 years.
FURTHER INFORMATION
INPUT CHARACTERISTICS
Measurement range: NTC: -50.0°C ... +110°C; PTC: -55.0°C ... +150°C; PT1000: -60.0°C ... +150°C
(on 3-digit display with +/- sign)
Accuracy: ±1.0° for temperatures below -30°C
±0.5° for temperatures between -30°C and +25°C
±1.0° for temperatures above +25°C
Resolution: 1 or 0.1°C
Buzzer: NO
Analogue/Digital Inputs: 5 configurable NTC/PTC/PT1000/DI inputs
1 multi-function, voltage-free digital input (D.I.)
OUTPUT CHARACTERISTICS
Digital Outputs: OUT1: 1 SPST relay: 2HP max 240Va
OUT2: 1 SPDT relay: 1HP max 250Va
OUT3: 1 SPDT relay: 8(4)A max 250Va
OUT4: 1 SPST relay: 8(4)A max 250Va
OC (Open Collector) Output: OC: 1 multifunctional output: 12Vc 20mA
MECHANICAL CHARACTERISTICS
Dimensions: 121x92 mm
Terminals: faston and screw for wires with cross-section of 2.5mm2
TTL for Unicard / Device Manager connection (via DMI)
Usage / Storage: 10...90% RH (non-condensing)
Connectors:
Humidity:
REGULATIONS
Electromagnetic compatibility: The device complies with Directive 2004/108/EC
Safety: The device complies with Directive 2006/95/EC
Food Safety: The device complies with standard EN13485 as follows:
• Suitable for storage.
• Application: air.
• Climate range A
• measurement class 1 in the range from -25°C to 15°C (*)
(* with Eliwell probes only)
NOTE
: The technical specifications stated in this document regarding measurement (range, accuracy, resolution, etc.) refer to
the instrument alone and not to any accessories provided, such as the probes.
This means, for example, that the error introduced by the probe must be added to the error of the instrument.

3-4 STARTUP / OPERATION
P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
RTN400 Page 8/130
CONNECTIONS
TERMINALS
LINK2
KEYB
{
{
RS485
OPTIONAL
ELIWELL
ELIWELL
33
32
31
29
30
28
27
26
25
24
22
20
18
23
21
19
1
2
3
5
9
4
11
12
10
GND D
GND
GND
D
OC
12V
D
12V
15 16 17
34 35 36 37 38 39
A
14
13
6
8
7
OUT2 (1HP)
OUT1 (2HP)
OUT3 (8A)
OUT4 (8A)
*N.B.: analogue inputs PB1...PB5 can also be configured as Digital Inputs DI.
TERMINALS
1-2 NEUTRAL. These are power supply terminals. 15-16-17 Connection to KDEPlus or KDWPlus external
keyboard or ECPlus echo module.
3LINE. These are power supply terminals. 19-18 PB1 probe connection.
4OUT2 Shared Terminal 21-20 PB2 probe connection.
5N.O. OUT2 23-22 PB3 probe connection.
6N.C. OUT2 23-24 PB4 probe connection.
7OUT3 Shared Terminal 23-25 PB5 probe connection.
8N.C. OUT3 27-26 Digital input (DI).
9N.O. OUT3 28-29 LINK2. Connection 1 - local area network.
10 OUT1 Shared Terminal 30-31 LINK2. Connection 2 - local area network.
11 N.O. OUT1 32-33 Open Collector Output (OC).
12 Not Used ATTL Unicard/DMI/Multi Function Key connection
13 OUT4 Shared Terminal 34-35-36 RS485. Connection 1 - Supervision Gateway.
14 N.O. OUT4 37-38-39 RS485. Connection 2 - Supervision Gateway.

P/N 0515258_N 3-5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM Merchandisers
RTN400 Page 16/130
LED
RTN400 family controllers will also function even if a keyboard has not been connected.
With KDEPlus or KDWPlus keyboards (which are the same and guarantee the same functions), the display will be as follows:
1
2
5
6
8
7
4
3
Meaning of LEDs:
No Icon LED Operation Meaning
1Compressor
Permanently on compressor on
Blinking Delay, protection or start-up blocked
OFF otherwise
2Defrost
Permanently on Defrost active
Blinking Activated manually or from Digital Input
OFF otherwise
3Fans Permanently on Fans active
OFF otherwise
4Reduced SET / Economy
Permanently on Energy Saving active
Blinking Reduced setpoint active
OFF otherwise
5Alarm
Permanently on alarm active
Blinking Alarm acknowledged
OFF otherwise
6°F readout Permanently on °F setting (dro =1)
OFF otherwise
7AUX
Permanently on Aux output active and/or light on
Blinking Deep cooling on
OFF otherwise
8°C readout Permanently on °C setting (dro = 0)
OFF otherwise
N.B.: When the instrument is powered on it performs a lamp test, during which time the display and LEDs will
flash for several seconds to check that they all function correctly.

3-6 STARTUP / OPERATION
P/N 0515258_N U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
RTN400 Page 17/130
KDEPLUS BUTTONS
The KDEPlus keyboard has 4 keys, as shown in the illustration:
1
2
3
4
Each key has a different function depending on whether it is:
• Pressed and released
• Pressed for at least 5 seconds
• Pressed and held at start-up
• Pressed in combination with another key.
KEYS
The following table summarizes the function of each key:
No Key Action
Pressed and released Press for at least 5 secs Start-up
1• Scrolls through menu items
• Decreases values
Activates the Manual Defrost function
(from outside menus). ---
2• Scrolls through menu items
• Decreases values
Function can be configured by the user
(from outside menus).
(see parameter H32)
---
3
• Returns to the previous menu
level
• Confirms parameter value
Activates the Stand-by function
(from outside menus). ---
4set
• Displays any alarms
(if active)
• Opens Machine Status menu
• Confirms commands
Opens the Programming Menu
(User and Installer parameters)
When pressed during
start-up it enables
the user to select the
application to be loaded.
STANDBY or ESC
DOWN SET
UP