Hussmann LTH-18 Installation Manual

LTH

®

Low Temperature

Merchandisers

IMPORTANT

Keep in store for
future reference!

MANUAL- I/O LTH SC

Installation &

Operation Manual

P/N 0506146_G

JUNE 2015

Spanish 0531295

French 0531296

P/N 0506146_G

Merchandiser must operate for 24 hours
before loading product!

Regularly check merchandiser temperatures.

iii

Do not break the cold chain. Keep products
in cooler before loading into merchandiser.

These merchandisers are designed for
pre-frozen products only.

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 1-800-890-2900

www.hussmann.com

© 2015 Hussmann Corporation

TABLE OF CONTENTS v

ANSI Z535.5 DEFINITIONS ............ vi

INSTALLATION

NSF Certification ..................... 1-1

Hussmann Product Control .............. 1-1

Location ............................. 1-1

Shipping Damage ..................... 1-1

Self Contained (Location) ............... 1-2

Unloading ........................... 1-3

Exterior Loading ...................... 1-3

Shipping Skid ........................1-3

Model Description .................... 1-4

Cabinet Leveling ...................... 1-4

Door Seal ............................ 1-5

Serial Plate Location ................... 1-5

Door Lock ........................... 1-5

Shelf Installation ...................... 1-6

Lamps .............................. 1-6

Door Switch .......................... 1-6

Stocking ............................. 1-7

Condensing Unit Air Flow .............. 1-7

Load Limits .......................... 1-7

LTH Illustrations ..................... 1-8

ELECTRICAL / REFRIGERATION

Plug ................................. 2-1

Refrigeration .......................... 2-2

Defrost Cycle ......................... 2-2

MAINTENANCE

Care and Cleaning ..................... 4-1

Exterior Surfaces .................... 4-1

Interior Surfaces ..................... 4-1

Cleaning Shelves ..................... 4-2

Cleaning Condenser Coils .............. 4-2

Optional Reversing Condenser Fan ..... 4-3

Cleaning the Wash Out Drain .......... 4-4

Tips and Troubleshooting ............... 4-4

SERVICE

Replacing Fluorescent Lamps ............ 5-1

Replacing Display Lamp ................ 5-1

Replacing Interior Lamps ............... 5-2

Replacing Electronic Ballasts ............. 5-2

APPENDIX A — TECHNICAL DATA

Part Numbers ....................... A-1

Refrigeration Data ................... A-5

Defrost Data ........................ A-5

Physical Data ........................ A-5

LTH - Electrical Data ................. A-6

LTH - Dimensions .................... A-6

LTH-8S Wiring Diagrams ............. A-8

LTH-18 Wiring Diagrams ............. A-9

LTH-45, 68 Wiring Diagram .......... A-10

START UP / OPERATION

Operating Safe-NET™ III Controls ....... 3-1

Start-Up / Operation ................... 3-2

Alarms and Codes ..................... 3-2

Defrost Termination Switch ............. 3-3

Manual Defrost ....................... 3-3

Temperature Adjustment ............... 3-4

Typical Sensor to Control Configuration .. 3-5
Sequence of Operation - LTH

Merchandisers ........................ 3-6

Controls and Adjustments .............. 3-7

Thermostatic Expansion Valve ........... 3-8

TEV Adjustment ...................... 3-8

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

WARRANTY

LTH Merchandisers

vi

REVISION HISTORY

REVISION G

New wiring diagrams, changed ambient temp
Page 1-1; Maintenance, 4-2, updated charts,
Page A-5, A-6

Revision F

Sensor Location, Page 3-5, 3-6; Removed
Type 2, Page 1-1; Added California Warning,
Page 1-3; Removed Safe-NET 1 references,
Section 2; New Part Numbers, Section 5;
New Wiring Diagrams, Section A; Cut-in,
Cut-out, Page A-5.

Revision E

Eliminate barcode from the front page
Eliminate IR Logo from pages 24 (3-6),
25 (3-7), 27 (3-9), 52 (last page).
Update revision letter (D to E, all pages with
the revision) and the Date.
Removed Picture of LED receptacles on
Page 2-1; Changed LED and Fluorescent
Electrical requirements on (left Column
wording)

* * * * * * * * * * * * * * * * * * * * * * * * * *
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.

Revision D — December 2010
Added Air Flow Drawing, Page, 1-2
Added Model Description, Page, 1-3
Added Serial Plate Location, Page 1-5
Revised Stocking Illustrations, Page 1-7
Added Sequence of Operation
Diagram, Page 3-5
Added Appendix A

Revision C — June 2009
Added LTH-45 and LTH-68 models
Updated wiring diagrams
Added Safe-NET I codes
Added Safe-NET III information

Revision B — Added Safe-NET™
Restructured manual; added Maintenance
information

Revision A — Original Issue

P/N 0506146_G U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

P/N 0506146_G

INSTALLATION

NSF CERTIFICATION

These merchandisers are manufactured to
meet ANSI / National Sanitation Foundation
(NSF®) Standard #7 requirements.
Proper installation is required to maintain
certification. Near the serial plate, each
case carries a label identifying the type of
application for which the case was certified.

ANSI/NSF-7 Type I - Display Refrigerator / Freezer

Intended for 75°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
correct parts.

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%.

Recommended operating ambient temperature
is between 65°F (18°C) with a maximum 55%
relative humidity to 75°F (23.9°C) with a
maximum 55% relative humidity.

1-1

Placing refrigerated merchandisers in direct
sunlight, near hot tables or near other heat
sources could impair their efficiency. Like
other merchandisers, these self-contained units
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 case. LTH units in take air and exhaust air

through the front of the case, and require no
clearance space on top, at the back or either side.

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.

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.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

LTH Manual

1-2 Installation

36 in.

36 in.

Air

Intake

Front

Rear

(Plan View)

Air

Intake

Air

Exhaust

Air

Exhaust

LTH-45 LTH-68

36 in.

Air

Intake

Front

Rear

(Plan View)

Air

Exhaust

LTH-68

SELF CONTAINED (LOCATION)

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.

Be sure to position self contained

merchandisers properly.

SELF CONTAINED models have vented base
panels to allow air circulation through the
condensing unit.

Allow for a minimum 36 in. clearance in the
front. Blocking or restricting air flow will
adversely affect performance and may damage
the refrigeration system.

36 in.

36 in.

LTH-8/18

Air

Exhaust

Front

(Plan View)

Air

Intake

Zero Clearance

at Sides and Rear

36 in. Clearance
at Front

LTH-68

Air

Intake

Rear

36 in.

P/N 0506146_G

LTH-45

Air

Intake

Air

Exhaust

Front

(Plan View)

Air

Intake

Zero Clearance

at Sides and Rear

36 in. Clearance
at Front

Rear

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Air

Exhaust

Front

(Plan View)

Air

Intake

Zero Clearance

at Sides and Rear

36 in. Clearance
at Front

Rear

P/N 0506146_G

1-3

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 damage:

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.

Remove the top of the crate and detach
walls from each other. Lift crate from the
skid. Unscrew the case from the skid. The
merchandiser can now be lifted off the crate
skid. Lift only at base of skid! Remove any
braces and/or skids attached (blanket wrapped
merchandiser may have skids).

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. To remove the skid, remove screws
attaching skid to the merchandiser.

Check floor where merchandisers are to be set
to if it is a level area. Determine the highest
part of the floor.

For California Businesses:

Do NOT stand or walk on top of

merchandiser. Do not store items or

ammable materials atop the unit.

EXTERIOR LOADING

Do NOT walk on top of the merchandiser 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.

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.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

LTH Manual

1-4 Installation

MODEL DESCRIPTION

LTH merchandisers are low temperature self­contained cabinets, designed for pre-packaged
frozen food or products that require frozen
temperatures for conservation.

Design features include:

• Self-closing glass doors

• Electronic controls

• CFC-free foam insulation

• Lighted Sign (except LTH-8S)

• Door lock

• Cassette refrigeration system

Available options are:

• Reversing condenser fan motor

• Buzzer alarm

CABINET LEVELING

This merchandiser must be installed level

(from back to front, and side to side) to allow
maximum draining of the condensate water as
well as proper door alignment and operation.
Choose a level area to install case.

Do NOT remove shipping crate until the

merchandiser is positioned

for installation.

LTH-8S and LTH-18 cases have one
adjustable cabinet foot at each bottom corner
for easy adjustment if required. LTH45
and LTH68 also have an adjustable foot at
center front and back. Turn the foot levelers
clockwise to add length to each foot for
leveling.

When optional 6-inch legs are used, screw the
legs tight to the merchandiser base and then
adjust the feet.

When optional casters are used, screw them
tight to the merchandiser base. Once in final
position, lock each caster.

P/N 0506146_G

U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM

Adjustable Foot

Thumbscrew Lock

Lock Each Caster

P/N 0506146_G

1-5

DOOR SEAL

Check that hinge doors close automatically
by opening the door 45 degrees and releasing.
Ensure door closes and gasket seals door shut.
To adjust the torque applied to the hinged
door:

1. Place a wrench on each of the two lower

support nuts located at the bottom hinge.

2. Loosen the lower nut while holding the

upper nut in place.

3. Torque is increased or decreased by
rotating the top nut. After adjustments are
made, tighten the bottom nut while holding
the upper nut in place. Torque bottom nut to a
minimum of 20 ft-lb.

SERIAL PLATE LOCATION

The serial plate is located at the interior left
side of the merchandiser’s cabinet. It contains
all pertinent information such as model, serial
number, amperage rating, refrigerant type and
charge.

DOOR LOCK

A door lock is standard on all doors. The key
is tie-wrapped to the door handle at shipment.

Adjust Door Closing Torque

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

LTH Manual

1-6 Installation

SHELF INSTALLATION

After the cabinet is leveled, the shelves may
be installed. Wire shelves are adjustable.
Shelf spacing can be adjusted by positioning
the shelf clips according to individual loading
requirements.

LTH-8S merchandisers have three movable
wire shelves and one solid shelf. LTH-18,
LTH-45 and LTH-68 merchandisers have four
movable wire shelves and one solid shelf,
per door.

NOTE: The movable wire shelves may be
reversed so that the wire shelf lip is positioned
in the front as a product stop.

Case Front

Door
Lock

Shelves

Solid Shelf

NOTE:
Do not move the Solid
Shelf at the front of case

Never Block
Air Opening

Solid Shelf

LAMPS

This merchandiser has a light switch that
operates both the display and the interior
lamps. Interior lamps are equipped with a
plastic shield for safety.

DOOR SWITCH

The merchandiser’s door switch controls the
evaporator fan motor. The switch shuts the
evaporator fan off when the door is opened.
This reduces energy consumption and helps
prevent product temperatures from increasing
from the door being opened and closed.

P/N 0506146_G

U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM

Door Switch

Light Switch

Display Lamp with Cover Removed

P/N 0506146_G

STOCKING

Product should NOT be placed in case
until merchandiser is at proper operating
temperature. The LTH merchandisers must

remain in operation for at least 24 hours before
product may be loaded into case cabinet.

Proper rotation of product during stocking
is necessary to prevent product loss. Always
bring the oldest product to the front and set
the newest to the back.

Air exhAust And return grille must remAin

open And free of obstruction At All times.

1-7

No product

within

4 inches

of top

Do not allow product, packages, signs, etc. to
block air exhaust or return grille. Do not use
non-approved shelving, baskets, display racks,
or any accessory that could hamper air curtain
performance.

top four inches of lth cAses becAuse
product will block the cold Air flow.

do not stock product in the

CONDENSING UNIT AIR FLOW

An optional reversing condenser fan is
available for all LTH models. The condenser
fan runs in reverse during the defrost cycle
to clear the condenser coil of debris that was
accumulated during the refrigeration cycle.

LOAD LIMITS

Product must be within designated load limit
to ensure proper refrigeration and air curtain
performance.

Load Limit for LTH-8S Merchandisers

No product

within

4 inches

of top

Load Limit for LTH-18, LTH-45 and LTH-68

Merchandisers

At no time should product be stocked:

• Beyond the front of shelves

• Near the air exhaust duct located at the top rear of case

• Near or covering the front return air grille

• Within four inches of the top of the cabinet (This space must be free of product and other materials.)

DO NOT LOAD CASE WITH WARM PRODUCT.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

LTH Manual

1-8 Installation

LTH Illustrations

LTH-8S LTH-18 LTH-45 LTH-68

P/N 0506146_G

U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM

P/N 0506146_G

ELECTRICAL / REFRIGERATION

PLUG

The plug cord is 9 ft long and is located on
the right hand rear of the merchandiser.
Disconnect power before servicing. LTH
merchandisers require a dedicated electrical
circuit with ground. 12AWG is the minimum
sized acceptable wire.

Merchandiser must be grounded.

Do not remove the power supply cord ground.

2-1

ALWAYS CHECK THE SERIAL PLATE FOR

COMPONENT AMPERES

• The LTH-8S and LTH-18 require a dedicated
15 AMP/115V circuit with grounded wall
receptacle (NEMA 5-15R).

• The LTH-45 requires a dedicated
15 AMP/208-230V circuit with a grounded
wall receptacle (NEMA 6-15R).

• The LTH-68 requires a dedicated 20
AMP/208-230V circuit with a grounded wall
receptacle (NEMA 6-20R).

• 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.

Risk of Electric Shock. If cord or plug

becomes damaged, replace only with

a cord and plug of the same type.

Nominal Minimum Maximum
Voltage Voltage Voltage

120 108 132

208-230 188 253

— LOCK OUT / TAG OUT —
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.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

LTH Manual

2-2 Electrical / Refrigeration

REFRIGERATION

Each LTH merchandiser have Safe-NET III
controls.

Safe-NET III Display

from the interior side of the door. Defrost
is initiated by Safe-NET III control, and is
terminated according to coil temperature.
In the event the sensor does not terminate the
defrost cycle, a fail-safe value is programmed
to terminate on time.

All LTH merchandisers are factory set with
three defrost cycles, every 8 hours.

With Safe-NET III, the defrost cycle is initiated
at start-up and every 8 hours thereafter. If the
power is interrupted, the defrost resets to this
time. The defrost can be reset to a desired time
by unplugging and restarting the merchandiser
at the preferred time.

After the defrost cycle, evaporator fans are
delayed from starting to prevent water from
being blown out of the evaporator pan.
Fans are also delayed during initial startup for
approximately 10 minutes.

Safe-NET III Control

All LTH merchandisers are equipped with a
hermetic compressor. The condenser has a
fin and tube construction. Cold discharge air
flows from the top air duct on the back of the
case. Air is returned through the bottom front
return air grille.

DEFROST CYCLE

All LTH merchandisers require defrost cycles
for proper operation. The defrost cycles are
factory set.

Merchandisers are set to defrost three times
each day. During defrost, the evaporator fans
operate intermittently to clear any condensation

Evaporator Fans

Note: To reduce accumulation of frost on the
evaporator coil, the fans will cycle off with
each door opening and back on as the door
closes.

The evaporator fans also cycle ON and OFF
during the defrost. The fans cycles for
10 seconds every two minutes. The fan cycles
increase defrost efficiency.

P/N 0506146_G

U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM

P/N 0506146_G

START UP / OPERATION

OPERATING Safe-NET III CONTROLS

3-1

The Safe-NET III electronic temperature and
defrost controller is located in the cassette
compartment. The controller comes factory set
at position #5 and is ready to go.

Safe-NET III Controller Location

The front grille must be removed in order to
access this control. To remove the grille, open
the door and remove the two plastic screws
and retainers on the top of the grille, then tilt
out and lift up to remove.

The temperatures can be adjusted by rotating
the knob counter-clockwise for a warmer
setpoint, or clockwise for a colder setpoint.
The display shows the setpoint for a few
seconds when changed, then reverts to showing
the sensed temperatures in the merchandiser.

The adjustment knob allows the user to
select a pre-configured cold setpoint, warm
setpoint or any setpoint within this range. The
adjustment knob is also configured with

O

n functionality to power off the controller.

Off/

The off position shuts off the compressor only.

UNPLUG THE UNIT FOR SERVICE.

Position #5

Remove Plastic Screws

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.

Interface

Cable Plug

Unplug Interface Cable

Remove Plastic Screws

The top, or green, LED indicates the case is
in refrigeration mode. The center, or yellow,
LED indicates the case is in defrost mode.
The bottom (red) LED indicates an alarm
condition, such as merchandiser warming up
because the door is not closed.

Compressor
Powered on

GREEN

Defrost Cycle

YELLOW

Alarm

RED

Off / On Position

Safe-NET III Indicators

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

LTH Manual

3-2 Start up / OperatiOn

START-UP / OPERATION

The defrost cycle is initiated at power on.
(This cycle will quickly terminate on the
initial start-up of a warm merchandiser.)
Another defrost cycle will follow every 8 hours
thereafter. The defrost times will reset whenever
power is interrupted. Therefore, the standard
defrost times can be reset by interrupting power
(full stop, then start) at the desired time. This
will reset the initial time and restart the 8-hour
cycle.

During the compressor-on time (1 minute),
or compressor-off time (2 minutes), built-in
protection time will delay the defrost initiation.

If you force a defrost cycle during this time,
the feature will initiate but not start until the
compressor protection mode times out.

ALARMS AND CODES

Safe-NET III is available with an audible
alarm (located in the display module) that
sounds in the event a failure occurs.

flashing TemperaTure Or sensOr alarm
leD, e1

Or e2

If the Temperature or Sensor Alarm LED
(red) on the controller and display is flashing,
a temperature sensor has failed (or sensor is
disconnected). The display shows E1 if the case
sensor has failed (or disconnected) or E2 if the
evaporator sensor has failed (it is disconnected).

If the merchandiser sensor fails, refrigeration
will run continuously. Turn off, or repeat
a duty cycle of a few minutes on and a few
minutes off.

Troubleshooting

Alarm
or Code Indicates Action

Red LED • Firmware • Call Service
remains ON corruption on immediately
after startup controller

• Controller is
not operating
Red LED turns • Case • Make sure the door
on during temperature is closed
operation is too warm • Make sure that cold
or too cool air is not being
blocked or deflected

• Check the
temperature using
the optional display
or a thermometer

• If the LED does not
turn off after on hour,
call Service
Red LED • Temperature • Check the optional
flashes sensor failure display for error code

• E1 indicates E1 or E2 and call
a case Service immediately
temperature
failure

• E2 indicates
an evaporator
temperature
sensor failure

P/N 0506146_G

U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM

P/N 0506146_G

4

DEFROST TERMINATION SWITCH

Merchandisers may use a defrost termination
switch, instead of an evaporator sensor
to terminate a defrost cycle. The defrost
termination switch is temperature activated
and senses the completion of defrost.

3-3

Compressor
Off Time If
Sensor Failed

On

Compressor or

Refrigeration

Status

Off

Off

MANUAL DEFROST

Note:

This procedure initiates
a manual or forced
defrost.

Compressor
On Time If
Sensor Failed

On

Off

3

2

1

I

Warm

Note location of

1.
knob setting

3

2

1

I

Warm

Rotate knob fully

2.
counterclockwise
until it stops (full

On

Time

5

6

7

I

Cold

4

5

6

7

I

Cold

4

5

3

2

1

Warm

3.

After 10 seconds, but
before 20 seconds,
rotate knob fully
clockwise until it
stops (full cold position)

6

7

I

I

Cold

IMPORTANT:

Return the control knob to its original setting
(Step 1) once the manual defrost has been
initiated.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

LTH Manual

3-4 Start up / OperatiOn

2

1

4

5

3

6

7

COLDWARM

Display - at Full Cold
Model LTH

"OFF" Position

Safe-NET III Control
# 1 Position

Safe-NET III Control

Set at Full Cold Position

3

2

1

TEMPERATURE ADJUSTMENT

4

5

6

7

COLDWARM

Display - at #1 Position
Model LTH

1. Rotate the adjustment knob counter
clockwise for a warmer setpoint or
clockwise for a colder setpoint.

2. While adjusting the temperature, the display
shows the setpoint (cut out value). A few
seconds after the temperature is set, the
controller reverts to the sensed temperature
in the merchandiser.

3. To verify merchandiser settings, turn the
dial to warm and cold as shown above.
Output readings should be within one
degree of the temperatures shown above.

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The control has protective settings to prevent
short cycling of the compressor.

A. The compressor may run for up to 60 sec.

after Step 2 is completed. Start the 10 sec.
count down for Step 3, once the display is
blank.

B. The defrost initiation may be delayed for

up to 120 sec. after Step 3 is completed.

P/N 0506146_G

Typical Sensor to Control Configuration

The LTH-8S & LTH-18 sensors are located on the cassette as shown below.

LTH-45 and LTH-68 have two cassettes, the Sensors are located on the right hand cassette.

in.

Yellow Sheath

MM

3-5

Black Sheath

Black (Air Sensor #8)

Black (Evaporator Sensor #9)

8

9

10

11

Not Used #11

White
(Common both Sensors #10)

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LTH Manual

3-6 Start up / OperatiOn

Sequence of Operation — LTH Merchandisers

1 NOTE: The 65°C Version Controller includes a Parameter Code Number. This number indicates what program has been

loaded into the controller. When the Controller is first powered up or is turned off and then back on a 2 digit Parameter
Code Number will display for 3 seconds. Then the Self Check will Start.

1a. The Safe-NET Parameter Code is 50 for LTH-8S, LTH-45 and LTH-68. The Parameter Code is 75 for the LTH-18. If the

case is warm at initial start-up, the defrost will be initiated and will terminate almost immediately. (Display will lock in
current temperature when defrost is initiated.)

1b. If the case is cold (as if it is turned off and then back on), the defrost cycle will continue until the termination
temperature is reached or the fail-safe time has expired.

2 The compressor will start 10 seconds after the power is applied.

3 The compressor will run for 10 minutes. Then, defrost will be initiated.

4 During defrost, the display will show the temperature before defrost, and it will continue to show this

temperature for 1 hour. Compressor will turn back on once coil is defrosted.

5 The compressor will continue to run until it reaches its cut-out temperature (pull down).

6 The refrigeration cycle will continue until the next scheduled (8 hours) or demand defrost.

7 3 and 4 will repeat until power is interrupted.

NOTE: If power is interrupted, sequence will start at 4. Defrost will be initiated and the time to subsequent
defrost will reset.

P/N 0506146_G

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P/N 0506146_G

3-7

Controls and Adjustments

Defrost ControlsRefrigeration Controls

Model

LTH
(All)

Product
Application

Frozen Food

Discharge Air
Temperature

Defrost
Frequency
(per day)

3

Type of
Defrost

Electr ic

Termination
Temperature

Failsafe
Time

(Minutes)

50

1. The Safe-NET III Controller controls
refrigeration temperature. This is factory
installed in the control panel. Adjust this
control knob to maintain the discharge air
temperature shown. Measure discharge air
temperatures at the center of the discharge air
opening.

Defrosts are time initiated and temperature
terminated for self contained. The defrost
setting is factory set as shown above.

To ensure a thorough defrost, defrost must
be terminated by the temperature termination
setting — not by time.

— LOCK OUT / TAG OUT —
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.

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LTH Manual

3-8 Start up / OperatiOn

THERMOSTATIC EXPANSION VALVE
(TEV)

Each self contained merchandiser has its own
evaporator coil and a pre-set thermostatic
expansion valve (TEV). The TEV has been
factory set at design conditions to provide the
recommended performance.

Remove the fan panel to expose the thermostatic
expansion valve.

TEV ADJUSTMENT

Expansion valves may be adjusted to fully feed
the evaporator. Before attempting to adjust
valves, make sure the evaporator is clear or only
lightly covered with frost, and the merchandiser
is within 10°F of its expected operating
temperature.

Adjust the valve as Follows:

a. Attach a probe to the suction line near the
expansion valve bulb.

b. Obtain a pressure reading from the factory
installed Schraeder valve. Convert the pressure
reading to a saturated temperature for the
refrigerant.

Temperature (b) minus Temperature (a) is the
superheat. The valve should be adjusted so that
the greatest difference between the two temperatures
is 3°F to 5° F.

Make adjustments of no more than

1

/2 turn of
the valve stem at a time and wait for at least 15
minutes before rechecking the probe temperature
and making further adjustments.

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P/N 0506146_G

MAINTENANCE

To reduce the risk of fire, electrical shock or
injury when cleaning this merchandiser:

• Unplug the merchandiser before cleaning;

• Keep all liquids away from electrical and
electronic components;

• Do not use any mechanical device or other
means to speed the defrost process, except
as recommended by the manufacturer.

CARE AND CLEANING

Long life and satisfactory performance of
any equipment is dependent upon the care it
receives. To ensure long life, proper sanitation
and minimum maintenance costs, this unit
should be thoroughly cleaned, all debris
removed and the interiors washed down.
Cleaning often will control or eliminate odor
buildup. Frequency of cleaning is dependent
on usage and local health requirements.

Do not use HOT water on COLD glass surfaces.
This can cause the glass to shatter and could
result in personal injury. Allow glass fronts,
ends and service doors to warm before applying
hot water.

Exterior Surfaces

The exterior surfaces must be cleaned with a
mild detergent and warm water to protect and
maintain their attractive finish.

Never use abrasive cleaNers or scouriNg

pads. Never use caustic soda, keroseNe,
gasoliNe, thiNNer, solveNts, detergeNts,
acids, chemicals or abrasives. do Not use
ammoNia-based cleaNers oN acrylic parts.

4-1

Interior Surfaces

do Not use ammoNia-based products to

cleaN light shields. Never use abrasive
cleaNsers or scouriNg pads.

The interior surfaces may be cleaned with most
domestic detergents and sanitizing solutions
with no harm to the surface. Always read and
follow the manufacturer’s instructions when
using any cleaning product.

Do NOT Use:

• Abrasive cleansers and scouring pads, as
these will mar the finish.

• Coarse paper towels on coated glass.

• Ammonia-based cleaners on acrylic parts.

• A hose on lighted shelves or submerge the
shelves in water.

• Solvent, oil or acidic based cleaners on any
interior surfaces.

• A hose on rail lights, canopy lights or any
other electrical connection.

Do:

• First turn off refrigeration, then disconnect
electrical power.

• Remove product and loose debris.

• Thoroughly clean all surfaces with soap
and hot water.

high water pressure hoses to wash the
iNterior. These desTroy merchandiser’s

sealing causing leaks and poor
performance.

• Take care to minimize direct contact between
fan motors and cleaning or rinse water.

• Rinse with hot water, but do NOT flood.

• Allow merchandiser to dry before resuming
operation.

• Wipe down lighted shelves with a damp
sponge or cloth so that water does not enter
the light channel.

submerge shelves iN water.

• After cleaning is completed, restore power
and turn on the merchandiser.

do Not use steam or

do Not use a hose or

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LTH Manual

4-2 Maintenance

Product will be degraded

and may spoil if allowed to sit

in a non-refrigerated area.

Cleaning Shelves

Shelves and shelf clips are easily removed for
cleaning the interior as well as the shelves
themselves

Cleaning Condenser Coils

Next, detach the merchandiser’s electrical wire
harness located on the right hand side near the
coil. For Safe-NET III, detach the interface
cable to the display.

Interface

Cable Plug

To maintain peak operating efficiency, the coil
should be cleaned at least once each month.
A dirty coil slows product cooling significantly
and increases energy consumption by as much
as 20%. Dirt buildup on coils can also cause
the compressor to lock up damaging the
condenser unit.

• Remove screws on top of each side of the
louvered from grille, then lift off the grille.

Remove Screws at Top of Grille (LTH-18 shown)

Unplug Safe-NET III Interface Cable

Unplug Power Harness

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P/N 0506146_G

Remove Screws Holding Cassette

Remove the two screws securing refrigeration
unit cassette in place.

Use the center black bar to pull the
refrigeration unit’s cassette forward to access
the coils.

4-3

Use a soft hand brush attachment on a
vacuum to remove accumulated dust and
debris.

Consult an authorized service technician if
more extensive cleaning is needed.

If the refrigeration unit is damaged, it can be
replaced with a new cassette.

Optional Reversing Condenser Fan

If your merchandiser is equipped with the
optional reversing condenser fan, you may
notice the condenser fan running during
the defrost cycle. This is normal in this
application. The purpose of reversing the air
direction during defrost is to remove lint and
dust that accumulates on the condenser fin
surfaces during the refrigeration cycle. This
feature reduces the need to clean the condenser
manually, and increases compressor life
because of lower condensing temperatures.

use oNly the ceNter bar to pull out the

cassette. pulliNg oN refrigeratioN liNes
or other parts will cause damage to the
refrigeratioN uNit.

Center Bar

Use Center Bar to Pull Cassette

IMPORTANT

INFORMATION

For prompt service when contacting the

factory, be sure to have the case model and

serial number from the case serial plate.

— LOCK OUT / TAG OUT —
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.

Cleaning the Wash Out Drain

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LTH Manual

4-4 Maintenance

The wash out drain is located behind the
refrigeration cassette and can be cleaned with
water and wiped with a soft cloth. Ensure
drain is unobstructed before replacing cassette.
The washout drain flows into an auxiliary

Drain

Wash Out Drain

waste line.

Next remove the auxiliary waste line cap to
drain any excess water. Place a dry towel over
the line to absorb water.

Replace cap, cables and cassette.

TIPS AND TROUBLESHOOTING

There are a few simple things to check before
calling for service:

1. Product not cold? Refrigeration unit
requires 24 hours at initial startup to cool
down to operating temperature with

product loaded in merchandiser. Ask when

No

merchandiser was stocked, and what the
usage has been. It may take 30 minutes or
more for product to chill following stocking.

2. Check the door and door seal for air leaks.

3. Power Supply:

Is the unit plugged in?
Is there power to the unit?

4. Location

What are the ambient conditions—

temperature and humidity, direct sun,
nearby source of heat, such as oven or
grill? Is the unit level? Has the unit been
moved recently?

Auxiliary Waste Line

Cap

Replace Cap, Cables and Cassette

5. Shelves and Stocking

Are the standard shelves in the correct places?
Is the product stocked properly?
Is the bottom shelf at the proper location?

6. Confirm that the defrost schedule is

properly set using Safe-NET I.

Check for Safe-NET error messages.

Cable

IMPORTANT

INFORMATION

For prompt service when contacting the

factory, be sure to have the case model and

serial number from the case serial plate.

P/N 0506146_G

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P/N 0506146_G

SERVICE

— LOCK OUT / TAG OUT —
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.

REPLACING FLUORESCENT LAMPS

Fluorescent lamps have a plastic shield. When
the lamp is replaced, keep the lamp shield to
install over the new lamp..

5-1

REPLACING DISPLAY LAMP

Disconnect power to the merchandiser.
Remove plastic pins attaching the display lamp
panel. There are three pins at the bottom of
the display cover and two on top of the display
panel.

Remove the merchandiser’s display cover panel
and change out the lamp. Replace the display
panel cover.

Pin

The switch under the display lamp cover
operates both the display lamp and interior
lamps.

Plastic Shield

Fluorescent
Lamp

Remove Plastic Pins Attaching Display Lamp

Remove Plastic Pins Attaching Display Lamp

Display Cover Panel Removed

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LTH Manual

5-2 Service

REPLACING INTERIOR LAMPS

LTH merchandisers have interior case lamps.
The lamps are protected by a clear, plastic
shield. Remove the shield to replace lamp.
Wedge a small putty knife at the top rear of
the lamp, then carefully loosen the shield from
the side of the merchandiser.

Wedge Putty Knife at Top Rear of Display Lamp

Once the shield is out of rear track, the lamp shield
can be removed from the merchandiser. Remove
lamp shield and change out lamp. Replace lamp
shield at bottom corner bracket first.

Bow Shield to Replace

REPLACING ELECTRONIC BALLASTS

The electronic ballast or LED power supply
for the LTH-8S is located on the refrigeration
cassette. This ballast operates the interior
lamp.

The electronic ballast or LED power supply
for the LTH-18, LTH-45 and LTH-68 is
located on the top of the merchandiser under a
sheet metal enclosure. (LTH-68 shown.)

Remove Shield from Display Lamp

For LEDs, follow the same steps to remove the
shield. Then pull out the LED fixture respecting
the fixture position. Next, bow lamp shield and
replace shield into top corner bracket. Smooth
shield to ensure a good replacement fit for the
lamp shield.

To access the ballast or LED power supply,
the protective enclosure is removed by
removing screws as shown below.

P/N 0506146_G

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P/N 0506146_G

Models

Standard Parts

Appendix A — TechnicAl dATA A-1

LTH8S LTH-18 LTH-45 LTH-68

Descripon Part Number

Power Cord (NEMA 5-15P) 19S216 X X
Power Cord (NEMA 6-15P) 508528 X
Power Cord (NEMA 6-20P) 1804385 X
Door Switch (fans) 03S121 X X X X
Light Switch 1801241 X X X X
Defrost Sensor (Yellow) 1.5MM 0509123 X X X X
Air Sensor (Black) 1.5MM 0509122 X X X X
Safe-Net III Controller 65C 0524118 X X X
Safe-Net III Controller 65C 0551127
Safe-Net III Display (F°) 65C 1H59052001 X X X X
Safe-Net III Display Interface Cable 1M 0509783 X X X X
Safe-Net IIIControl Harness 0513058
Safe-Net IIIControl Harness 0507356
Safe-Net IIIControl Harness 0510339 X X
Compressor Relay (T92P11A22-120) 1804291
Compressor Relay (T92P11A22-240) 0518447 X X
Heater Relay (T92P7A22-240) 1804241 X
Time Relay (TGC2030SC2J) 0509498 X X
Pilaster Strip (30") 0501242
Pilaster Strip (42") 0501240
Shelf Clips (insert into pilaster strips) 0403363
Fan Delay Thermostat 1701540
Defrost Heater Limit Thermostat 0344662
Wire Shelf (White) 15.5 X 19.625 0506952
Wire Shelf (White) 22 X 24.5 1201584
Wire Shelf (White) 22 X 22.688 0506348 X X
Interior Light Cover 0507791
Interior Light Cover 0506054
Top Hinge Cover 0506914
Feet (Adjustable) 1005319
Lamp Shield 0509372
Lamp Shield 1804590
Lamp Shield 1004377 X X
Lamp (F25T8/SPX41 RS GE) 1801494
Lamp (T5 F

amp (FO32/841 32W 1803337 X X

L
Light Harness (w/ Lamp holders) 0507004
Light Harness (w/ Lamp holders) 0509570 X X
Lamp Holder 0506517
Lamp Cap 0506516
Assy Lens Mullion 0510340 X X

Q54W/840 HO) 1804587

X

X X

X

X X
X X
X X
X

X

X
X X
X

X

X

X

X

X

X

X

X

X

X
X

X X
X X
X X
X X

X X

X X

5-3

X

X

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LTH Manual

5-4 Service

A-2 Appendix A — TechnicAl dATA

Standard Parts Connued…

Ballast Modificaon (w/Connecons added) 0507588 X
Ballast (Robertson RP1420) 1804450 X
Ballast (WHSG4-UNV-T8-IS) 0509567 X
Door LH Black 7408853 X
Door LH Black 7408650 X
Door LH Black 0506156 X X
Door RH Black 0507741 X
Door Gasket 1501487 X
Door Gasket 1501448 X
Door Gasket 0506159 X X
Torsion Rod 0507228 X X X X
Door Bushing 0519882 X X X X
Door Lock 0505225 X X X X
Door Handle (Black) 1004348 X X X X
Plasc Lower Front Grille (KO for SNIII) 0506912 X
Plasc Lower Front Grille (KO for SNIII) 0516530 X
Plasc Lower Front Grille (KO for SNIII) 0506816 X
Plasc Lower Front Grille (KO for SNIII) 0506817 X
P

TM Boo

PTM Boom Shelf 0518311 X X

m Shelf 0518310 X

Models LTH8S LTH-18 LTH-45 LTH-68

Upper Lighted Canopy Part Number

Plasc Display 1H12756001 X
Plasc Display 0506944 X
Plasc Display 0506945 X

Lamp Holder 1803376 X X X
Lamp (F17T8/SPX41) 1803689 X
Lamp (FO32/841 32W) Interior lamps also 1803337 X
Lamp (F30 T8/CW) 1800278 X
Ballast (QTP2X54T5HO/UNV PSN) 1804574 X
Ballast (WHSG4-UNV-T8-IS) Interior lamps also 0509567 X
Ballast (WHSG2-UNV-T8-IS) 0509272 X

P/N 0506146_G

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P/N 0506146_G

Refrigeration Part Number

Compressor (Embraco NT2178GKV) 1H12397 X

Compressor (NT2192GKV) 2000588 X

Compressor (NT2178GK) 0507909 X

Compressor (NJ2212GK) 0507805 X

Condenser 1H12549 X

Condenser (On LTH45 RH Cassette) 2100214 X X X

Condenser (On LTH45 LH Cassette) 2100213 X X

Condenser Fan Motor 0508069 X

Condenser Fan Motor 1700502 X

Condenser Fan Motor Assy (Motor,Blade & Mtg Brkt) 0508557 X X

Condenser Fan Motor 1800566 X X

Condenser Fan Blade 0501428 X

Condenser Fan Blade 0500354 X X X

Evaporator Fan Motor Assy (Motor,Blade, & Brkt) 0506136 X X

Evaporator Fan Blade (FV600CW30P3B) 0501426 X X X X

Evaporator Fan Motor (SSC B138 JHEM1) 1804554 X X

Evaporator Fan Motor Assy (Motor,Blade, & Brkt) 0508113 X

Evaporator Fan Motor 0510149 X X

Evaporator Fan Motor Assy (Motor,Blade, & Brkt) 0507900 X

Evaporator Coil 1H12309 X

Evaporator Coil 2200182 X

Evaporator Coil 0507584 X

Evaporator Coil 0507382 X

Accumulator 1701752 X X X X

TXV (Sweat)R404A TUB#4 0509121 X

TXV (Sweat)R404A EXPT52 MOD 068Z3414 1701366 X

TXV (Sweat)R404A TUB orifice#5 068U3371 0510392 X

Appendix A — TechnicAl dATA A-3

5-5

Filter Drier (Sporlan C-032S) 1701751 X X X
Drier (Danfoss 023Z5129) 0510867 X
Condenser Gasket 1H13191 X
Condenser Gasket 1501473 X
Condenser Gasket 0508101 X
Condenser Gasket 0507803 X
Evaporator Gasket 0506925 X
Evaporator Gasket 1501343 X
Evaporator Gasket 0508100 X
Evaporator Gasket 0507806 X
CRO (CRO-4-0/50) 0518905 X

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LTH Manual

X

Appendix A — TechnicAl dATA A-4

5-6 Service

Heaters Part Number

Defrost Heater 1H13190 X
Defrost Heater 1804360 X
Defrost Heater 0507931 X
Defrost Heater 0507383 X
Door Frame AS Heater 0507786 X
Door Frame AS Heater 1804541 X
Door Frame AS Heater 0507631 X X
Case perimeter AS Heater 1804602 X
Case perimeter AS Heater 1804539 X
Case perimeter AS Heater (2) 0507630 X X

Sheel Metal Replacement Parts Painted

Boom Solid Shelf Assy 7408890 X
Boom Solid Shelf Assy 7408686 X
Boom Solid Shelf Assy LH 0506441 X X
Boom Solid Shelf Assy RH 0507394 X X
Boom Solid Shelf Assy Center 0508065 X
Boom Shelf
Boom Shelf Cover (Stainless Steel) 0506511 X
Boom Shelf Cover LH (Stainless Steel) 0507599 X X
Boom Shelf Cover RH (Stainless Steel) 0507587 X X
Boom Shelf Cover Center (Stainless Steel) 0508067 X
Door Hinge Lower 0521105 X X X* *
Door Hinge Lower 0510152 X** X**
Hinge Plate Upper Assy (w/ pin) 0508176 X
Door Hinge Assy Upper 0505093 X X X
Door Lock Bracket 0494798 X X X X

*(1) On LTH45 for LH Dr & (1) on LTH68 for LH Dr

**(1) On LTH-45 for RH Door & (2) on LTH68 for Center & RH Dr.

Cover (Sta

inless Steel) 0507863 X

All these part numbers below are painted assemblies

P/N 0506146_G

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P/N 0506146_G

A-5 Appendix A — TechnicAl dATA

5-7

REFRIGERATION DATA

Dimensions shown as inches and (mm).

LTH-8S, LTH-18, LTH-45, LTH-68

Thermostat
Setting CI/CO (°F)

Models LTH-8S, LTH-45, LTH-68
Position #1 5º F / -5º F
Positions #7 -18º F / -28º F
Models LTH-18
Position #1 0º F / -5º F
Positions #7 -23º F / -28º F

Compressor (hp)

LTH-8S
LTH-45

1

/2 hp LTH-18 1 hp

1

/2 hp x 2 LTH-68 3/4 hp x 2

Condensing Unit Capacity
LTH-8S 1834 LTH-18 2376
LTH-45 1834 x 2 LTH-68 2376 x 2

at -30º F evaporator and 110º F condenser
temperature

Note: This data is based on store temperature
and humidity that does not exceed 75°F and
55% R.H. unless otherwise stated. Schedule
defrost at night while lights are off.

DEFROST DATA

Frequency (hr) 8

Offtime

Failsafe (minutes)
All models 50

Defrost Termination
Temperature (F) 48

PHYSICAL DATA

Refrigerant Charge

LTH-8S 10 oz 0.283 kg
LTH-18 17 oz 0.482 kg
LTH-45 11 oz 0.312 kg (each cassette)
LTH-68 15 oz 0.426 kg (each cassette)

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LTH Manual

5-8 Service

5

/8

5

/8

5

/8

5

/8

5

/8

3

/4

3

/4

3

/4

3

/4

1

/2

1

/2

1

/8

13

/16

1

/4

3

/8

3

/8

1

/4

Dimensions

Exterior

Interior (useable)

Model

Doors

Refrig.

Cu. Ft.
Capacity

Appendix A — TechnicAl dATA A-6

LTH — Dimensions

Dimensions

Model

Doors

*Note: Depth dimension “D” includes 1½ in. for door handle
**Note: Overall height includes1½ in. for leveling pods

LTH — Electrical Data

Refrig.

Cu. Ft.
Capacity

Exterior

5

/8

3

/8

1

/4

5

/8

5

/8

3

/4

3

/4

3

/4

3

/4

Interior (useable)

5

/8

3

/8

1

/4

13

1

1

1

/8

/2

/2

/16

5

/8

Electrical

*Estimated energy consumption for optional LEDs

*

*

12.08

19.57

34.80

51.67

P/N 0506146_G

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P/N 0506146_G

A-7 Appendix A — TechnicAl dATA

Electrical Data

Note: These are rated values for individual components and should not be added together to
determine total merchandiser electrical load.

Evaporator Fans 115V, 60Hz Standard for LTH-8S/18, 208-230V for LTH-45/68
LTH-8S LTH-18 LTH-45 LTH-68

Number of Motors 1 2 4 4

Amperes 0.4 0.8 1.2 1.2

Watts 16 32 120 120

Condensing Unit (115V, 1Ph, 60Hz) Standard for LTH 8S/18, 208-230V for LTH 45/68

Compressor LRA 56 45 59.8 59.8

Compressor RLA 10.5 10.2 12 12

5-9

Product Data

LTH-8S Interior Volume (Cu Ft/Case) 10.7 ft

LTH-18 Interior Volume (Cu Ft/Case) 22 ft

LTH-45 Interior Volume (Cu Ft/Case) 41.1 ft

LTH-68 Interior Volume (Cu Ft/Case) 63.97 ft

ESTIMATED SHIPPING WEIGHT

2

Case
LTH-8S 310 lb (141kg)

LTH-18 535 lb (243kg)

3

/case (301.57 liters /case)

3

/case (622.97 liters /case)

3

/case (1163.7 liters /case)

3

/case (1811.34 liters /case)

LTH-45 1014 lb (460kg)

LTH-68 1036 lb (470kg)

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

2

Actual weights will vary according to optional kits included.

LTH Manual

5-10 Service

Appendix A — Wiring diAgrAms A-8

LTH-8S

ELECTRIC SPECS
MODEL: LTH8S
VOLTAGE: 115 V
FRECUENCY: 60 HZ
COMPRESSOR: NT2178GK EMBRACO

WARNING
UNPLUG THE EQUIPMENT BEFORE SERVICING

ADVERTENCIA:
DESCONECTAR EL EQUIPO ANTES DE HACER CUALQUIER
REPARACI”N, PARA EVITAR ALGUN DA—O.

THERMOSTAT

BLACK SHEATH

SAFENET III CONTROL

1

2

P

H

E

A

A

T
R

E

E

BK R BK BL W BK

B

4 5

3

H

F

S

A
N

O

H

C

P

S

A

M

E

A

N

SENSOR

AIR TEMP

6

LIN

P

2

E

THERMOSTAT

SENSOR TEMP

DEFROST

LIGHT FLUORESCENT

BK

LIGHT
SWITCH

DIODE

BALLAST

POWER
SUPPLY

W

GND

GND

DOOR SWITCH

BK

LAMP

LED

FRAME HEATER

YELLOW SHEATH

SERIAL

7

B

B

L

I

W

W

K

K

E

N
1

8 9

11

10

2 M

HACCP

LINK

PROG

KEY

DISPLAY

OPTIONAL HEATER

BK

HEATED GLASS

CABINET HEATER

BK

BK

BK

W

Y

Y

FAN DELAY

T-LIMIT

HEATER DEFROST

0508092_C

EVAPORATOR FAN

BK

NC

COM

NO

CONDENSER FAN

C

S

W

GRD

NEMA
5-15 P

W

0

1

3

7

NC

4

8

COM

2

6

NO

3

COMPRESSOR

5

4

2

14

115 V
60HZ
1HP

2

1

R

BK

W

WARNING

All components must have mechanical ground, and the merchandiser must be grounded.

Circled Numbers = Parts List Item Numbers

R = Red Y = Yellow G = Green BL = Blue BK = Black W = White

W

P/N 0506146_G

U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM

P/N 0506146_G

A-9 Appendix A — Wiring diAgrAms

LTH-18

5-11

W

Y

W

W

W

W

W

DOOR SWITCH

EVAPORATOR

FANS

CONDENSER FAN

NEMA
5-15 P

115 V
60HZ
1HP

GRD

1

2 3

A

E

P

H

H

S

A

E

R

E

T

BK

B

FAN DELAY

0

1

3

7

NC

NC

4

8

COM

COM

6 2

NO

NO

BK

THERMOSTAT

SENSOR

AIR TEMP

BLACK SHEATH

SAFENET III CONTROL

4

5 6

P

H

F

A

A

N

R

COMPRESSOR

S

E

RELAY

O

C

M
A

P

N

BL

BK

L

I

N

2

E

DEFROST HEATER

W

L

7

I

N
1

E

BK

B

B

W W

K

K

8 9

10

THERMOSTAT

SENSOR TEMP

DEFROST

YELLOW SHEATH

11

DEFROST RELAY

3

NC

8

COM

6

NO

ELECTRIC SPECS
MODEL: LTH18
VOLTAGE: 115 V
FRECUENCY: 60 HZ
COMPRESSOR: NT2192GKV EMBRACO

WARNING
UNPLUG THE EQUIPMENT BEFORE SERVICING

BK

ADVERTENCIA:
DESCONECTAR EL EQUIPO ANTES DE HACER CUALQUIER
REPARACI”N, PARA EVITAR ALGUN DA—O.

SERIAL
HACCP

LINK

PROG

KEY

DISPLAY

BK

BK

2 M

0

1

7

NC

4

COM

2

NO

2

1

COMPRESSOR

W

W

W

W

S

INTERIOR LED

INTERIOR LED

INTERIOR LAMP

INTERIOR LAMP

SIGN LAMP

C

3

R

DOOR PERIMETER HEATER

5

4

4

SIGN LED

2

1

POWER
SUPPLY

BALLAST

BALLAST

BK

BK

BK

LIGHT
FLUORESCENT

LIGHT SWITCH

BK

(MODELS WITH HEATED GLASS ONLY)

DIODE

FRAME HEATER

HEATED GLASS

W

2402812_G

WARNING

All components must have mechanical ground, and the merchandiser must be grounded.

Circled Numbers = Parts List Item Numbers

R = Red Y = Yellow G = Green BL = Blue BK = Black W = White

= 120V Power = 120V Neutral

= Field Ground

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. • WWW.HUSSMANN.COM

= Case Ground

LTH Manual

5-12 Service

Appendix A — Wiring diAgrAms A-10

LTH-45 and LTH-68

1

2 3

P

H

H

E

A

AT

E

R

E

BK

B

LTH45

NEMA
6-15 P

208-230V
60HZ
1HP

R

BLACK SHEATH

SAFENET III CONTROL

4

C

F

H

P

O

A

S

A

S

M

N

E

P

R BKBLW

GRD

THERMOSTAT

SENSOR

AIR TEMP

5 6

L

L

N

I

I

N

A

N

2

E

E

BK

7

1

LTH68

NEMA
6-20 P

B

B

K

K

9

8

208-230 V
60HZ
1HP

THERMOSTAT

SENSOR TEMP

DEFROST

YELLOW SHEATH

W

W

10

11

ELECTRIC SPECS

MODEL: LTH45

BK

SERIAL
HACCP

LINK

PROG

KEY

DISPLAY

2 M

BK

VOLTAGE: 208-230 V

FRECUENCY: 60 HZ

COMPRESSOR: NT2178GK EMBRACO

ELECTRIC SPECS

MODEL: LTH68

VOLTAGE: 208-230 V

FRECUENCY: 60 HZ

COMPRESSOR: NJ2212GK EMBRACO

WARNING

UNPLUG THE EQUIPMENT BEFORE SERVICING

ADVERTENCIA:

DESCONECTAR EL EQUIPO ANTES DE HACER CUALQUIER

REPARACI”N, PARA EVITAR ALGUN DA—O.

BK

W

DOOR SWITCHES

W

W

W

ONLY WHEN REVERSING
COND FAN IS USED

W

TIME DELAY

2

W

3

3

S

W

W

SIGN LAMP45 INTERIOR LAMP68

W

W

W

W

FRAME HEATER

0

3

NC

8

COM

6 2

NO

OVERLOAD

OVERLOAD

1

C

3

R

COMPRESSOR

CASSETTE-RIGHT

SIGN LAMP-LTH-68

SIGN LAMP-LTH-68

INTERIOR LAMP

INTERIOR LAMP

INTERIOR LAMP

EVAPORATOR

FANS

DEFROST RELAY

1
7

NC

4

COM

4

NO

T-LIMIT

Y

FAN DELAY

DEFROST HEATER

1

COMPRESSOR

RELAY

0

1

3

7

NC

NC

4

8

COM

COM

5

4

5

NO

RELAY

REVERSING
CONDENSER

2

14

START CAP.

RUN CAP.

LIGHT
FLUORESCENT

BL

BALLAST

R

R

BALLAST

BL

DOOR PERIMETER HEATERS (2 LTH45, 3 LTH68)

6 2

NO

2

(MODELS WITH HEATED GLASS ONLY.)

2 DOORS ON LTH45

BK

FAN

BK

SIGN LED-LTH-68

BK

SIGN LED-LTH-68

W

W

BK

SIGN LED45 INTERIOR LED68

DIODE

DEFROST HEATER

3

S

INTERIOR LED

INTERIOR LED

INTERIOR LED

3 DOORS ON LTH68

EVAPORATOR

FANS

T-LIMIT

COMPRESSOR RELAY

0

1

3

7

NC

NC

8 4

COM

COM

2

6

NO

NO

2

OVERLOAD

1

C

R

COMPRESSOR

BL

R

FAN DELAY

2

DEFROST RELAY

NC

COM

NO

W

REVERSING

CONDENSER

RELAY

5

3

4

START CAP.

RUN CAP.

CASSETTE-LEFT

BK

POWER

W

SUPPLY

R

BL

BK

BK

BK

W
POWER
SUPPLY

MODELS LTH45 AND LTH68

0

1

3

7

NC

COM

8 4

2

6

NO

BK

ONLY WHEN REVERSING
COND FAN IS USED

1
4

BK

FAN

BK

2

14

BK

BK

5

BK

LIGHT

SWITCH

T-LIMIT

0508524_D

BK

WARNING

All components must have

a mechanical ground, and

the merchandiser must be

grounded.

BK

BK

HEATER GLASS

P/N 0506146_G

U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • WWW.HUSSMANN.COM

To obtain warranty information

or other support, contact your

Hussmann representative.

Please include the model and

serial number of the product.

Hussmann Corporation, Corporate Headquarters: Bridgeton, Missouri, U.S.A. 63044-2483 01 October 2012

Hussmann Corporation

12999 St. Charles Rock Road
Bridgeton, MO 63044-2483
www.hussmann.com