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