Page 1
®
Merchandisers
Low Temperature
Single Deck Wall & Island Merchandisers
IIMMPPOORRTTAANNTT!!
Keep in store for
future reference.
Installation &
Operation Manual
Shipped With Case Data Sheets
P/N 0395730F
Impact Series
March 2005
Page 2
INSTALLATION
NSF Certification . . . . . . . . . . . . . . . . . . . 1-1
Location . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Shipping Damage . . . . . . . . . . . . . . . . . . . 1-1
Exterior Loading . . . . . . . . . . . . . . . . . . . . 1-2
Merchandisers Shipped
With End Installed . . . . . . . . . . . . . . . . . . 1-2
Shipping Braces . . . . . . . . . . . . . . . . . . . . 1-2
Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Joining Instructions . . . . . . . . . . . . . . . . . . 1-3
Installing Bumpers . . . . . . . . . . . . . . . . . . 1-3
Top Rails . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Glass Top Rails . . . . . . . . . . . . . . . . . . . . . 1-5
Glass Trim . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Installing Flue Glass . . . . . . . . . . . . . . . . . 1-6
REFRIGERATION / ELECTRICAL
Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Refrigerant Piping . . . . . . . . . . . . . . . . . . . 2-1
Insulation . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Front to Rear and/or End Interconnects . . . 2-2
Refrigeration Thermostat . . . . . . . . . . . . . . 2-2
Defrost Termination Thermostat . . . . . . . . 2-2
CDA Sensor (Optional) . . . . . . . . . . . . . . . 2-2
Merchandiser Electrical Data . . . . . . . . . . . 2-3
Field Wiring . . . . . . . . . . . . . . . . . . . . . . . 2-3
Electrical Connections . . . . . . . . . . . . . . . . 2-3
Identification of Wiring . . . . . . . . . . . . . . . 2-3
DRIP PIPING AND SPLASHGUARDS
Waste Outlet and Water Seal . . . . . . . . . . . 3-1
Installing Drip Piping . . . . . . . . . . . . . . . . 3-1
Installing Splashguards . . . . . . . . . . . . . . . 3-2
Sealing Splashguard to Floor . . . . . . . . . . . 3-3
START UP / OPERATION
Start up . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Stocking . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Load Limits . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Installing FDA/NSF Required Thermometer 4-1
Load Limit Profiles . . . . . . . . . . . . . . . . . . 4-2
MAINTENANCE
Care and Cleaning . . . . . . . . . . . . . . . . . . . 5-1
Cleaning Under Merchandisers . . . . . . . . . 5-2
Removing Scratches from Bumper . . . . . . 5-2
Cleaning Honeycomb . . . . . . . . . . . . . . . . 5-2
Removing Rear Flue Glass / Honeycomb
for Cleaning (LIG & LNG) . . . . . . . . . . . 5-3
Reinstalling Wire Racks, Pans,
and Interior Panels . . . . . . . . . . . . . . . . . 5-4
(Continued on next page)
Table of Contents
IMPORTANT
KEEP IN STORE FOR FUTURE REFERENCE
Quality that sets industry standards
12999 St. Charles Rock Road • Bridgeton, MO 63044-2483 U.S.A. • (314) 291-2000 • FAX (314) 298-4767
®
P/N 0395730F iii
R
Page 3
SERVICE
Replacing Fan Motors and Blades . . . . . . . 6-1
Replacing Modular Electric
Defrost Heater . . . . . . . . . . . . . . . . . . . . . 6-2
Replacing Nosing Anti-sweat Heater . . . . . 6-3
Replacing Drip Pan Heater . . . . . . . . . . . . . 6-5
Replacing Damaged Drain Fitting . . . . . . . 6-6
Removing Thermopane Glass Assembly . . . .6-7
Replacing Glass Perimeter
Anti-sweat Heater . . . . . . . . . . . . . . . . . . . 6-8
Repairing Aluminum Coil . . . . . . . . . . . . . 6-10
WARRANTY
REVISION F
1. Changed starter-bumper information, page 1-3.
2. Added bumper film removal, page 1-4.
3. Added 15 Oct 2003 Warranty.
Table of Contents (Continued)
iv
P/N 0395730F
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
Page 4
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
1-1
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 Type II – Display Refrigerator / Freezer
Intended for 80°F / 55%RH Ambient Application
ANSI/NSF-7 – Display Refrigerator
Intended for Bulk Produce
LOCATION
These merchandisers are designed for displaying
products in air conditioned stores where temperature is maintained at or below the ANSI/NSF-7
specified level and relative humidity is maintained
at or below 55%.
Placing refrigerated merchandisers in direct sunlight, near hot tables or near other heat sources
could impair their efficiency.
Like other merchandisers, these are sensitive to
air disturbances. Air currents passing around merchandisers will seriously impair their operation.
Do NOT allow air conditioning, electric fans,
open doors or windows, etc. to create air currents
around the merchandisers.
To prevent sweating on the exterior surfaces,
there must be a minimum clearance of 4 in.
(102 mm) between merchandisers, other fixtures
and store walls.
Product should always be maintained at proper
temperature. This means that from the time the
product is received, through storage, preparation
and display, the temperature of the product must
be controlled to maximize the life of the product.
Wide Island Fronts
B
E SURE TO POSITION WIDE ISLAND MERCHANDISER
FRONTS PROPERLY. The front of a wide island
merchandiser is readily identified by the location
of the serial plate (see leveling drawing.) Since
all electrical and refrigeration connections will be
made at the front side, the fronts will need to be
positioned according to the store plan layout.
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 request to the carrier for
inspection, within 15 days.
INSTALLATION
Do not walk or put heavy objects
on merchandiser.
CAUTION
!
Exercise caution at all times when moving
merchandisers with up-tilt riders.
They are top heavy and should NEVER be
left in the vertical position.
!
WARNING
Page 5
P/N 0395730F
1-2 INSTALLATION
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
EXTERIOR LOADING
Do NOT walk on top of merchandisers or dam-
age to the merchandisers and serious personal
injury could occur. THEY ARE NOT STRUCTURALLY
DESIGNED TO SUPPORT EXCESSIVE EXTERNAL LOAD-
ING such as the weight of a person. Do not place
heavy objects on the merchandiser.
MERCHANDISERS SHIPPED WITH END INSTALLED
If the merchandiser was shipped with the end
installed, two long bolts were used to hold the
shipping brace to the end. If the shipping bolts
are reinserted after removing the brace, they will
extend into the product area. THEREFORE, BE
SURE TO REPLACE THESE BOLTS WITH THE SHORT-
ER BOLTS PROVIDED.
Be careful not to damage the factory-installed
end while moving the merchandiser. Make sure
that tools are positioned past the end and beneath
the merchandiser’s support bar.
SHIPPING BRACES
Move the merchandiser as close as possible to
its permanent location and then remove all
packaging. Check for damage before discarding
packaging. Remove all separately packed
accessories such as kits and shelves.
LEVELING
Merchandisers must be installed level to ensure
proper operation of the refrigeration system and
to ensure proper drainage of defrost water. When
leveling merchandisers, use a carpenter’s level as
shown. Leveling shims are provided with each
merchandiser for use if needed. The shims are
12 in. (305 mm) long and 3 in. (76 mm) wide so
that you can level adjoining merchandisers at the
same time using one shim.
Notes:
•BEGIN LINEUP LEVELING FROM THE HIGHEST POINT OF
THE STORE FLOOR.
•If shimming two corners, check to see if a shim is
needed in the center of the merchandiser. If a gap
exists between the support rail of the merchandiser
and the floor, a shim should be placed in the center.
Serial Plate
LWUG
Serial Plate
(Solid Front
Location)
Electrical
Raceway
FAN
COIL
COIL
Levels
FAN
Page 6
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
1-3
JOINING INSTRUCTIONS
Sectional construction means that two or more
merchandisers may be joined in line yielding one
long continuous display requiring only one pair
of ends. To join like merchandisers, use the joining
parts and instruction shipped with each merchandiser. To join unlike merchandisers, or merchandisers of different temperature applications, an insulated 11/2
in. (38 mm) partition kit is required.
Partition kits are shipped separately; instructions
are included with each kit.
A
LL JOINTS MUST BE AIR-TIGHT TO PREVENT
FORMATION OF ICE OR CONDENSATION.
Refer to separate Joining Instruction shipped
with merchandiser.
INSTALLING BUMPERS
Offsetting the bumpers and top rails helps to
disguise the joint locations, giving the lineup a
smoother look.
For the top bumper, begin at the left end of
the line-up. For the lower bumper,
begin at the right end of the line-up.
A starter bumper is factoryinstalled with end kits. Insert
the internal joint trim, then
add the full-length
bumper.
Align each bumper section with its retainer and
push into place, working
from the end of the lineup. Install full length
bumpers and internal
joint trims offset across
joints. Make sure that no
gaps exist between sections. Continue installing
bumpers the length of the
line up.
Do NOT install the last bumper sections at this
time. These sections will be installed in the last
step (see next page).
Once all except the last section of upper bumper
and lower bumper have been installed, refrigerate
the merchandiser line-up for at least six (6) hours.
The last sections of bumper should be kept
inside a refrigerated merchandiser or cooler
during this time to allow the bumpers to con-
tract.
Full Length
Bumper
Merchandiser
Joint
Retainer
Starter
Bumper
Internal Joint
Trims
Full Length
Bumpers
Last Section
MUST BE COOLED
Before Cut to Length
Page 7
P/N 0395730F
1-4 INSTALLATION
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
Before installing the last
full-length sections, measure
each remaining space. Use a
miter box and fine-tooth saw
to cut last bumpers to length.
Install the last sections.
Remove protective film from
bumper and top rail once
installation is complete.
End bumpers are factory-installed.
To remove installed bumpers, it may be necessary
to use a small (dull) tool such as a screwdriver to
help pry up one corner edge while pushing the
bumper toward the color panel. A screwdriver is
needed to remove bumper corners.
TOP RAILS
Top rails are factory-installed. Joint trims are
supplied; refer to the separate Joining instruction.
Ends are factory installed with top rails.
Optional Stainless Steel Top Rail
Bumper
Miter Box
Top Rails
Corner
Top Bumpers
Screws
Upper Corner Bumper
Upper Bumper
Corner
Lower Bumper
Corner
Top Rail
Top Rails
Corner
Lower Corner Bumper
Page 8
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
1-5
GLASS TOP RAILS
Glass top rails are factory-installed. Internal color
trims are used under the glass top rail at joints.
Carefully remove glass top rails before joining.
Once line-up is complete, re-install glass top rails
with internal color trims. Ends are factory
installed with glass top rails.
GLASS TRIM
The trim on top of the glass is factory-installed.
Standard plastic trim is friction fit. Optional
stainless steel trim uses a foam sheet between the
glass and trim to prevent trim from slipping.
Screws hold corner trim in place.
Standard
Plastic Trim
Applying
Standard
Trim
O
UTSIDE OF
C
ASE
Glass Trim
Glass Top Rails
Corner
Glass Top Rail
Corner
1
Glass
Top Rail
2
Corner
Glass
Top Rail
Page 9
P/N 0395730F
1-6 INSTALLATION
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
INSTALLING FLUE GLASS
(GLASS FRONT MODELS)
The acrylic flue glass must be installed in the
channel to ensure efficient operation. Each section of flue glass has tabs to hold it away from
the front glass.
LIG and LNG models only have a honeycomb
retainer attached to the rear flue glass.
Flue Glass Channel
Acrylic
Glass
Trim
Grille
Flue Glass
Channel
Front Shelf
Support
Honeycomb
Retainer
Acrylic
Guard
Screw
Rear Flue Glass / Honeycomb Retainer Assembly
LIG And LNG Models Only
Nut
Retainer
Page 10
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
2-1
REFRIGERANT
The correct type of refrigerant will be
stamped on each merchandiser’s serial plate.
The merchandiser refrigeration piping is leak
tested, factory sealed and pressurized. Before
making refrigeration hookups, depress
Schrader valve to ensure that coils have
maintained pressure during shipment.
REFRIGERANT PIPING
Connection Location
The refrigerant line connections are at the righthand end of the merchandiser (as viewed from
the front) beneath the display pans. A sticker
marks the location of the connection “pod.” The
installer must saw a hole through the pod to exit
the merchandiser.
After connections have been made, seal this outlet thoroughly. Seal both the inside and the outside. We recommend using an expanding
polyurethane foam insulation.
Multiplexing
Piping of merchandisers operating on the same
refrigeration system may be run from merchandiser to merchandiser DO NOT RUN REFRIGER-
ANT LINES THROUGH MERCHANDISERS THAT ARE
NOT ON THE SAME REFRIGERATION SYSTEM
or
BRANCH as this may result in poor refrigeration
control and compressor failure.
Interconnecting piping inside the merchandiser
must be positioned to allow room for lifting the
hinged fan plenums and for clearance beneath the
display pans.
Line Sizing
Refrigerant lines should be sized as shown on
the refrigeration legend that is furnished for the
store or according to ASHRAE guidelines.
Note: If Koolgas defrost is used, the liquid line
will need to be increased two sizes larger inside
the merchandiser area. This is necessary to
ensure even liquid drainage from all evaporators
during defrost.
Oil Traps
P-traps (oil traps) must be installed at the base of
all suction line vertical risers.
Pressure Drop
Pressure drop can rob the system of capacity. To
keep the pressure drop to a minimum, keep the
refrigerant line run as short as possible using a
minimum number of elbows. Where elbows are
required, USE LONG RADIUS ELBOWS ONLY.
REFRIGERATION / ELECTRICAL
Refrigeration lines are under pressure and
should be depressurized before attempting
to make any connections.
Splashguard brackets MUST be installed
before piping merchandiser.
CAUTION
!
!
WARNING
Page 11
P/N 0395730F
2-2 REFRIGERATION / ELECTRICAL
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
INSULATION
With GAS Defrost
The suction and liquid lines should NOT contact
each other and should be insulated separately
for a minimum of 30 ft (9144 mm) from the
merchandiser.
With OTHER Than Gas Defrost
The suction and liquid lines should be clamped or
taped together and insulated for a minimum of
30 ft (9144 mm) from the merchandiser.
With EITHER of Above
Additional insulation for the balance of the liquid
and suction lines is recommended wherever condensation drippage is objectionable or the lines
are exposed to ambient conditions.
FRONT TO REAR AND/OR
END INTERCONNECTS
The wide island merchandisers are factory
equipped with separate piping and air systems
for each compartment, and are thus all capable of twin-temperature operation. This is a
standard feature.
If the wide island merchandiser is to be run at
a single temperature, factory installed piping
interconnect kits are available.
REFRIGERATION THERMOSTAT
The refrigeration thermostat body is located in
the electrical raceway. The bulb, when factory
installed, is located in the discharge flue. Wide
Island models will have two thermostats – one on
each side of the merchandiser.
DEFROST TERMINATION THERMOSTAT
The standard disc type defrost termination
thermostat is not adjustable. This thermostat
is clamped to the coil inlet tube.
CDA SENSOR (OPTIONAL)
Factory installed optional CDA sensor is located
where the thermostat bulb would normally be
located. Its leads will be routed through the electrical raceway and to the rack control panel.
Leads are tagged in the raceway. Wide Island
models will have two sensors – one on each side
of the merchandiser.
Page 12
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
2-3
MERCHANDISER ELECTRICAL DATA
Merchandiser data sheets for specific models are
shipped with this manual. The data sheets provide
merchandiser electrical data, electrical schematics, parts lists, and performance data. Refer to the
merchandiser data sheets and merchandiser 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. Field
wiring from the refrigeration control panel to the
merchandisers is required for defrost termination
thermostats and for optional refrigeration thermostats. When multiple merchandisers are on the
same defrost circuit, the defrost termination thermostats are wired in series.
ALWAYS CHECK THE SERIAL PLATE FOR
COMPONENT AMPERES.
ELECTRICAL CONNECTIONS
All wiring must be in compliance with NEC and
local codes. All electrical connections are to be
made in the electrical raceway on the serial plate
side of the merchandiser (front).
IDENTIFICATION OF WIRING
Leads for all electrical circuits are identified by
wire insulation color or colored plastic bands.
These bands correspond to the color code sticker
(shown below) located inside the merchandiser’s
raceway.
The defrost heaters, defrost termination thermostats and refrigeration thermostats on the wide
island models are tagged with identification as
being either front or rear merchandiser display
section defrost and refrigeration controls.
WIRING COLOR CODE
Leads for all electrical circuits are identified by wire insulation color or
a colored plastic band: neutral wire for each circuit has either White
insulation or a White plastic sleeve in addition to the color band.
P
INK ............REFRIG. THERMOSTAT LOW TEMP.ORANGE OR
LIGHT BLUE ..REFRIG. THERMOSTAT NORM TEMP.TAN..........LIGHTS
D
ARK
BLUE ..DEFROST TERM. THERMOSTAT MAROON ..RECEPTACLES
PURPLE........CONDENSATE HEATERS YELLOW....DEFROST HEATERS 120V
B
ROWN ........FAN MOTORS RED ........DEFROST HEATERS 208V
G
REEN* .......GROUND *EITHER COLORED SLEEVE OR COLORED INSULATION
ELECTRICIAN NOTE: Use copper conductor wire only.
MERCHANDISER MUST BE GROUNDED
Page 13
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
3-1
WASTE OUTLET AND WATER SEAL
The waste outlet is located in front of the fan
plenum 6 ft (1829 mm) from the left-hand end of
the merchandiser (facing merchandiser front). A
water seal is supplied with each merchandiser.
The water seal must be installed at the waste outlet to prevent air leakage and insect entrance into
the merchandiser.
NOTE:
Water seal outlet must clear front skid rail.
Refer to Data Sheets for dimensions.
A tee fitting, an adapter, a plug and a street ell are
also supplied with each merchandiser.
INSTALLING DRIP PIPING
Poorly or improperly installed drip pipes can
seriously interfere with the merchandiser’s operation and result in costly maintenance and product
losses. Improperly installed drip pipes can cause
condensate to form on the outside of drip pipes.
Refer to the data sheet shipped with each model
to correctly locate piping. Please follow the recommendations listed below when installing drip
pipes to ensure proper installation.
• Never use drip piping smaller than the nominal
diameter of the pipe or water seal supplied with
the merchandiser.
• When connecting drip piping, the water seal
must be used as part of the drip piping to prevent air leakage or insect entrance. The water
seal must be installed with the waste outlet at
the main drain point of each merchandiser.
Never use two water seals in series in any one
drip pipe.
DOUBLE WATER SEALS IN SERIES WILL CAUSE
AN AIR LOCK AND PREVENT DRAINING.
• Pitch the drip piping in the direction of flow.
There should be a minimum pitch of 1/8 in. per ft
(3 mm per 305 mm).
• Avoid long runs of drip piping. Long runs make
it impossible to provide the pitch necessary for
good drainage.
• Provide a suitable air break between
flood rim of the floor drain and outlet
of drip pipe. To meet code on low base
merchandisers, it may be necessary to
install a field-supplied drip pipe reducer. An alternative is to cut the last section of drip pipe at an angle.
• Prevent drip pipes from freezing:
– Do NOT install drip pipes in contact with
uninsulated suction lines. Suction lines should
be insulated with a non-absorbent insulation
material.
– Where drip pipes are located in dead air
spaces, such as between merchandisers or
between a merchandiser and a store wall,
provide means to prevent freezing.
Splashguard brackets MUST be
installed before piping merchandiser.
DRIP PIPING AND SPLASHGUARDS
CAUTION
!
Field
Installed
Water
Seal
Center of Case
Waste Outlet
Base Of Case
Front of Case
Page 14
P/N 0395730F
3-2 DRIP PIPING AND SPLASHGUARDS
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
INSTALLING SPLASHGUARDS
The splashguard and brackets are shipped inside
each merchandiser.
Install splashguard brackets before piping
merchandiser. Use two screws per bracket; attach
brackets every 4 ft (1219 mm) at pre-drilled locations.
After merchandisers have been leveled and
joined, and all drip piping, electrical and refrigeration work has been completed, install the splashguards.
To Install Splashguards:
1. Check to be sure that all splashguard brackets
are level with the floor. Tighten screws.
2. Align splashguard so that slots in the top of
splashguard match the tabs extending from the
base of the merchandiser as shown.
3. Push splashguard up onto tabs until lower
edge of splashguard swings onto bracket.
Lower bottom of splashguard onto bracket tabs.
The end splashguards are installed last, as shown.
End Splashguard
Attachment
Two
screws
per
bracket
Bracket
at 4 ft
interval
Attach retainer
before attaching end
END SPLASHGUARD
ATTACHMENT
Page 15
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
3-3
Installing Trim on Optional Stainless Steel
Splashguard
A trim piece is installed when joining optional
stainless steel splashguards. Use slotted screws
provided.
SEALING SPLASHGUARD TO FLOOR
IF REQUIRED by local sanitation codes, or if
desired by the customer, Stainless steel splashguards may be sealed to the floor using a vinyl
cove base trim. The size of trim needed will
depend on how much the floor is out of level.
To install the trim to the splashguard:
1. Remove all dirt, wax and grease from the area
of the splashguard where adhesion will be
necessary. This is to ensure a good and secure
installation.
2. Apply a good contact cement to the cove trim
and allow proper drying time according to the
directions supplied with the cement.
3. Install the trim to the splashguard so that it is
lying flush with the floor. DO NOT SEAL THE
TRIM TO THE FLOOR.
4. If required by local health codes the Cove
Trim may be sealed to the floor, using a
silicone-type sealer. Sealant must be removed
and replaced when servicing.
Screws
Splash-guard
Splash-guard Trim
Splash-guard
Cove Trim
Splash-guard
Cement
Page 16
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
4-1
START UP
See the merchandiser's Data Sheet Set for refrigerant settings and defrost requirements. Bring
merchandisers down to the operating temperatures listed on the data sheet.
Each 4 ft (1219 mm) section has its own evaporator coil and pre-set non-adjustable thermostatic
expansion valve (TEV). No adjustment is
required. DO NOT REMOVE THE CAP ON THE
TEVS
. This cap is to be removed only for valve
disassembly.
The TEV has been factory set to provide the
recommended performance settings as specified
on the merchandiser data sheets.
STOCKING
Product should NOT be placed in merchandisers until merchandiser is at proper operating
temperature.
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.
A
IR DISCHARGE AND RETURN FLUES MUST REMAIN
OPEN AND FREE OF OBSTRUCTION AT ALL TIMES to
provide proper refrigeration and air curtain performance. Do not allow product, packages, signs,
etc. to block these grilles. Do not use nonapproved shelving, baskets, display racks, or any
accessory that could hamper air curtain performance.
LOAD LIMITS
Each merchandiser has a load limit decal.
Shelf life of perishables will be short if load limit
is violated. Overstocking will adversely affect
product temperature and merchandiser efficiency.
Recommended load limit profiles are shown on
the next page.
INSTALLING FDA/NSF REQUIRED
THERMOMETER
The following pages provide the same information that ships with the thermometer.
This requirement does not apply to display
refrigerators intended for bulk produce
(refer to page 1-1).
Please note that the tape cannot be exposed
after installation.
START UP / OPERATION
REMOVAL OF THE TEV CAP WILL RESULT IN
REFRIGERANT LOSS UNLESS THE SYSTEM IS FIRST
ISOLATED AND THE REFRIGERANT RECOVERED.
At no time should merchandisers be
stocked beyond the load limits
indicated.
CAUTION
!
LOAD LIMIT
!
WARNING
Page 17
P/N 0395730F
4-2 START-UP / OPERATION
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
LOAD LIMIT PROFILES
LW
LWG
LWGH
Load Limit
Load Limit
Load Limit
FRONT
FRONT
FRONT
L
LWE
LG
LWEG
LWEGH
Load Limit
Load Limit
Load Limit
FRONT
FRONT
FRONT
LIGH
LNGH
Load Limit
Load Limit
FRONT
FRONT
LN
LNM
Load Limit
FRONT
LI
LNG
LIG
Load Limit
FRONT
Page 18
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
4-3
This is an NSF-7 &
1999 FDA Food Code
Required
Thermometer
Thermometer — Hussmann P/N 430108
Double Stick Tape
— Inside
End Panel
— Shelf
Price Tag
Molding
— Return Air Grille
Suggested Mounting Locations
in Multi-deck Merchandisers
Suggested Mounting Locations
in Single Deck Glass Front
Impact Merchandisers
— Acrylic
Package Guard,
Facing Out
Flexible Plastic
Fits in Price Tag
Moldings
Page 19
P/N 0395730F
4-4 START-UP / OPERATION
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
Excerpt from ANSI / NSF-7:
5.30 Temperature indicating devices
5.30.1 Each refrigerated storage compartment and cabinet
shall have at least one securely mounted temperature indicating device that clearly displays the air temperature in the
compartment. Atemperature indicating device shall not be
required in beverage coolers or units intended solely for the
storage and/or display of ice cream and other frozen deserts.
5.30.2 The temperature display of a temperature indicating
device shall be visible immediately upon opening a door to
the refrigerated compartment or shall be visible from the
equipment exterior without opening a door to the compartment. The sensing element of the device shall be easily
cleanable and located to reflect the temperature in the
warmest part of the food storage compartment.
Open display refrigerators shall have a temperature indicating
device that is easily cleanable and located to reflect the
warmest part of the food storage compartment. Open display
refrigerators shall include a thermometer and installation
instructions for installing the thermometer in the warmest
part of the food storage compartment, as determined by the
manufacturer.
Excerpt from 1999 FDA Food Code:
4-204.112 Temperature Measuring Devices.
(A) In a mechanically refrigerated or hot
sensor of a
measure the air temperature in the warmest part of a mechanically refrigerated unit and in the coolest part of a hot
storage unit.
(B) Except as specified in ¶(C) of this section, cold or hot
holding
be designed to include and shall be equipped with at least
one integral or permanently affixed
DEVICE
temperature display.
(C) Paragraph (B) of this section does not apply to EQUIPMENT
for which the placement of a TEMPERATURE MEASURING DEVICE is
not a practical means for measuring the ambient air surrounding the
EQUIPMENT, such as calrod units, heat lamps, cold plates,
bainmaries, steam tables, insulated
and salad bars.
TEMPERATURE MEASURING DEVICE shall be located to
EQUIPMENT used for POTENTIALLY HAZARDOUS FOOD shall
that is located to allow easy viewing of the device’s
FOOD because of the design, type, and use of the
FOOD storage unit, the
FOOD
TEMPERATURE MEASURING
FOOD transport containers,
Important – Please read!
Each installation will be different
depending on how the unit is
stocked, shopping patterns in the
department and ambient conditions
of the store. The suggested locations provided herein are possible
locations. It is the responsibility of
the purchaser / user to determine
the location within the food storage
area of the unit that best meets the
code requirements above.
The thermometer may need to be
moved several times to find the
warmest location. Mounting options
include flexible plastic for price tag
molding application, magnet
applied to back of flexible plastic for
steel end wall, and double stick
tape. Tape must not be exposed
after installation.
Questions about either code should
be addressed to local agencies or
other appropriate officials.
Keep with merchandiser
or give to store manager — do not destroy.
Hussmann P/N 429971A 11/2000
Page 20
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
5-1
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, these merchandisers
should be thoroughly cleaned, all debris removed
and the interiors washed down, weekly.
Fan Plenum
To facilitate cleaning, the fan plenum is hinged.
After cleaning be sure the plenum is properly
lowered into position OR PRODUCT LOSS WILL
RESULT due to improper refrigeration.
Exterior Surfaces
The exterior surfaces should be cleaned with a
mild detergent and warm water to protect and
maintain their attractive finish. NEVER USE
ABRASIVE CLEANSERS OR SCOURING PADS.
Interior Surfaces
The interior surfaces may be cleaned with most
domestic detergents, ammonia based cleaners and
sanitizing solutions with no harm to the surface.
D
O NOT USE:
• Abrasive cleansers and scouring pads, as these
will mar the finish.
• A hose on lighted shelves or submerge the
shelves in water.
• Solvent, oil or acidic based cleaners on any
interior surfaces.
D
O:
• Remove the product and all loose debris to
avoid clogging the waste outlet.
• Store product in a refrigerated area such as a
freezer. Remove only as much product as can
be taken to the freezer in a timely manner.
• First turn off refrigeration, then disconnect
electrical power.
• Thoroughly clean all surfaces with soap and
hot water. DO NOT USE STEAM OR HIGH
WATER
PRESSURE HOSES TO WASH THE INTERIOR.
THESE WILL DESTROY THE MERCHANDISERS’
SEALING CAUSING LEAKS AND POOR PERFOR-
MANCE.
• Lift hinged fan plenum for cleaning. Hook
chain in rear panel to secure plenum during
cleaning. BE SURE TO REPOSITION THE FAN
PLENUM AFTER CLEANING MERCHANDISER.
• Take care to minimize direct contact between
fan motors and cleaning or rinse water.
• Rinse with hot water, but do NOT flood.
N
EVER INTRODUCE WATER FASTER THAN THE
WASTE OUTLET CAN REMOVE IT.
• Allow merchandisers to dry before resuming
operation.
• After cleaning is completed, turn on power
and refrigerant to the merchandiser.
• Verify that merchandiser is working properly.
MAINTENANCE
ALWAYS SHUT POWER OFF
DURING CLEANING PROCESS.
Do NOT allow product to sit in a
non-refrigerated area.
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..
!
WARNING
!
WARNING
!
WARNING
Page 21
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
CLEANING UNDER MERCHANDISERS
Remove splashguards not sealed to floor. Use a
vacuum with a long wand attachment to remove
accumulated dust and debris from under the merchandiser.
REMOVING SCRATCHES FROM BUMPER
Most scratches and dings can be removed using
the following procedure.
1. Use steel wool to smooth out the surface area
of the bumper or top rail.
2. Clean area.
3. Apply vinyl or car wax and polish surface for
a smooth glossy finish.
CLEANING HONEYCOMB
Honeycombs should be cleaned every six
months. Dirty honeycombs will cause merchandisers to perform poorly.
1. To remove the honeycomb, loosen or remove
screws in honeycomb retainer; then compress
honeycomb upward to remove.
2. Clean the honeycomb. Be careful not to damage honeycomb. The honeycomb may be
cleaned with a vacuum cleaner. Soap and
water may be used if the honeycomb is
removed from the merchandiser.
3. When completely dry, re-install honeycomb
in retainers and tighten screws.
P/N 0395730F
5-2 MAINTENANCE
Screws Retainer
Narrow or
Intermediate
Glass Wall
Island
Solid Wall
Honeycomb
Honeycomb
Retainers
Screw
Honeycomb
Honeycomb
Retainers
Screw
Page 22
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
5-3
REMOVING REAR FLUE GLASS /
HONEYCOMB FOR CLEANING
(LIG & LNG)
Compress the honeycomb upward to remove it
from its retainer.
Lift the flue glass / honeycomb retainer assembly
out of the grille channel.
The flue glass may be cleaned with most domestic detergents, ammonia based cleaners and sanitizing solutions with no harm to the surface.
NEVER USE ABRASIVE CLEANSERS OR SCOURING
PADS.
Remove any debris from grille channel. Dry flue
glass/retainer and reassemble in reverse order.
Illustrations below show how the acrylic flue
glass and honeycomb retainer are assembled, if
replacement is necessary.
Nosing
Retainer
Honeycomb
Flue Glass
Grille Channel
Shelf Support
Nosing
Flue Glass
Grille Channel
Shelf Support
Nut
Retainer
Screwdiver
Honeycomb Retainer
Honeycomb
Retainer
Nut
Retainer
Acrylic
Guard
Screw
Nut Retainer
Installed
Page 23
P/N 0395730F
5-4 MAINTENANCE
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
REINSTALLING WIRE RACKS,
PANS, AND INTERIOR PANELS
With the honeycomb assembly removed, all
interior wire racks, drip pans, and shelf support
panels may be lifted out without tools.
The wire rack telescopes to allow tilted displays
or removal of the rack. Ensure full insertion of
rack supports into front and rear panels before
loading.
Drip pans overlap when properly installed. Note
corner tabs at each end section.
Front and rear internal panels rest on fillister
screws. Do not pry at edges of panels. If panels
do not lift easily, insert a screwdriver into a rack
support hole and lightly tap the screwdriver to
raise the panel.
Reinstall in reverse order.
Wire Rack
Snap off
corner tabs
Snap off
corner tabs
Internal Panel
Page 24
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
6-1
REPLACING FAN MOTORS AND
BLADES
Refer to the data sheet shipped with each merchandiser to determine location of evaporator
fans. Should it ever be necessary to service or
replace the fan motors or blades be certain that
the fan blades are re-installed correctly. THE
BLADES MUST BE INSTALLED WITH RAISED
EMBOSSING (
PART NUMBER ON BLADES) POSI-
TIONED AS INDICATED ON THE PARTS LIST OF
THE DATA SHEET
.
For access to these fans:
1. Turn off power.
2. Remove wire racks and bottom display pans.
3. Disconnect fan from wiring harness.
4. Remove Speed-nut, fan blade, and washer.
5. Lift fan plenum and remove screws holding
bottom of motor to fan basket.
6. Replace fan motor. Make certain harnesses
are not caught or otherwise damaged.
7. Lower fan plenum. Replace washer, fan
blade, and Speed-nut.
8. Reconnect fan to wiring harness. Turn on
power.
9. Verify that motor is working and blade is
turning in the correct direction.
SERVICE
Always disconnect the electrical power at the
main disconnect when servicing or replacing
any electrical component. This includes, but
is not limited to, such items as fans, heaters,
thermostats and lights.
!
WARNING
Fan Blade
Washer
Speed-nut
Motor
Basket
Make Sure Fan Blade Spins Freely!
Page 25
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
6-2 SERVICE
REPLACING MODULAR ELECTRIC
DEFROST HEATER
These heaters are attached to the front of the
modular coils. They may be accessed by lifting
the fan plenums. To replace:
1. Turn off power to merchandiser.
2. Remove wire display racks and bottom display pans from the section of the compartment being serviced.
3. Hinge up and fasten the modular fan plenum
to the interior back panel with chain and hook
provided.
4. Unplug the heater from the heater harness.
5. Remove the heater from the face of the coil.
Be sure to save the attachment clips for the
new heater.
6. Install new heater.
7. Reposition fan plenum and reconnect power.
8. Verify heater is working properly.
P/N 0395730F
Hook to Back Panel
Modular
Defrost
Heater
Modular Coil
Always disconnect the electrical power at the
main disconnect when servicing or replacing
any electrical component. This includes, but
is not limited to, such items as fans, heaters,
thermostats and lights.
Modular Defrost Heater
!
WARNING
Heater
Coil
Clip
Heater
Bracket
Clips to be located 5-6 inches from bracket
Coil Fin
Coil Tube
Page 26
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
6-3
REPLACING NOSING
ANTI-SWEAT HEATER
Refer to illustrations on next page for location of
nosing anti-sweat heaters in each model.
To replace the heater:
1. Turn OFF the power to the merchandiser.
2. Remove the interior panels from under the
nosing heater to be replaced by lifting them
up and out.
3. Remove interior panel support bracket .
4. Remove existing screws from sheet metal
nosing panel; remove panel.
5. Remove insulation.
6. Unplug and remove existing anti-sweat heater
taped to sheet metal nosing panel. In most
applications anti-sweat heater plug is routed
on LH side from front of case. On LWU,
LWUG End compartment, heater plug is routed on RH side from front of case.
7. Tape Anti-Sweat Heater as shown and route
plug to Jumper Harness. If Price Tag
Molding is installed, allow clearance between
screws and wiring. Make sure that the edge of
foil tape is seated properly. Failure to do so
will cause damage to the wiring and heater.
8. Reinstall insulation, sheet metal nosing panel
screws, interior panel support bracket and
interior panels.
9. Turn on power to merchandiser and check for
proper operation.
Always disconnect the electrical power at the
main disconnect when servicing or replacing
any electrical component. This includes, but
is not limited to, such items as fans, heaters,
thermostats and lights.
Sheet Metal
Nosing Panel
Honeycomb
Insulation
Discharge Nosing
Anti-sweat Heater
Anti-Sweat
Heater
Place Edge of
Foil Tape in Corner
Return Lead
Coil
Fan
Honeycomb
Harness
!
WARNING
Page 27
P/N 0395730F
6-4 SERVICE
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
Cross Sections Showing Application of
Nosing Anti-Sweat Heater
Insulation
Insulation
Insulation(s)
Insulation
Screw(s)
Sheet Metal
Nosing Panel
L, LG - 8 &12’
Insulation
Jumper
Harness
(Power)
Double Pass
Anti-Sweat Heater
Honeycomb
Remove
Plastic Rail
Screw(s)
LN, LI
Sheet Metal
Nosing Panel
Insulation
Double Pass
Anti-Sweat Heater
Honeycomb
Jumper
Harness
(Power)
Sheet Metal
Nosing Panel(s)
Jumper
Harness(s)
(Power)
LW, LWG, LWU, LWUG
Screw(s)
Center
Flue Cover
Insulation(s)
Double Pass
Anti-Sweat Heater(s)
(2) Places
Honeycomb(s)
Braided
Wire
Screw(s)
Jumper
Harness
(Power)
Sheet Metal
Nosing Panel
Insulation
LWE, LWEG
LWU, LWUG End Compartment
Triple Pass
Anti-Sweat Heater
Honeycomb
Page 28
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
6-5
REPLACING DRIP PAN HEATER
1. Turn off power to the merchandiser.
2. Remove wire display racks, bottom display
pans, and internal panels from the compartment being serviced.
3. Unplug the heater from the heater harness.
4. Remove the upright and stiffener.
5. Remove all screws and clips, then remove the
heater.
6. Install new heater. Re-apply acrylic sealer
under clips. Carefully return clips to their
original position. Replace broken clips.
7. Reinstall upright and stiffener. Use acrylic
sealer on screws.
8. Reconnect harness and power.
9. Verify that heater is working properly.
Always disconnect the electrical power at the
main disconnect when servicing or replacing
any electrical component. This includes, but
is not limited to, such items as fans, heaters,
thermostats and lights.
Drip Pan Heater
Screw
Clip
Sealer
DETAIL
Drip Pan
Heater
Element
Stiffener
(Remove)
Sealant
Clip
Upright
(Remove)
!
WARNING
Page 29
P/N 0395730F
6-6 SERVICE
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
REPLACING DAMAGED
DRAIN FITTING
The following procedure is for the field repair of
a broken drain fitting.
1. Use a drill with a 1
7
/8-in. (48 mm) hole saw
to drill out the bottom of the drain fitting. Be
sure to drill completely through fitting and
bottom liner.
2. Apply teflon tape to threaded end of adapter
and screw into threaded end of tee.
3. Apply an ABS and PVC compatible primer
and sealer to adapter and inside of drain.
Insert adapter into drain fitting.
Drain Fitting
Viewed from Inside Merchandiser
Foam Bottom
Assembly
Modified
Drain Fitting
PVC Adapter
1
1
/2 x 11/4 inch
(38 x 32 mm)
(obtained at local
building supply store)
Tee 11/4 in.
(32 mm)
TxSxS
End Section View
Page 30
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
6-7
REMOVING THERMOPANE GLASS
ASSEMBLY
Requires TWO (2) people
Always use gloves when handling glass.
1. Turn off power to merchandiser.
2. Remove acrylic flue glass, wire racks, drip
pans, and shelf support panels. Remove glass
top trim and, if applicable, corner extrusion..
3. Disconnect the perimeter heater and glass
pane heater lead wires from the wiring junctions at each end of the glass assembly (four
leads). The connections are located just under
the return grille at each end of the glass
assembly.
4. With one person standing at each end of
glass, lift the thermopane glass assembly
straight up to remove it from its retainer
channel and the end posts.
5. To install glass, have one person hold each
end of the thermopane glass assembly and
carefully lower it into the retainer channel
and end posts.
6. Reconnect perimeter heater and glass pane
heater lead wires.
7. Turn on power. Verify that heaters are working properly.
Always disconnect the electrical power at the
main disconnect when servicing or replacing
any electrical component. This includes, but
is not limited to, such items as fans, heaters,
thermostats and lights.
Corner
Trim
Glass Trim
Corner Post
Heater
Wires
Routed
Through
Bushing
Screw
Glass Pane
Glass Trim
Glass Pane
Corner Extrusion
Screw
!
WARNING
Page 31
P/N 0395730F
6-8 SERVICE
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
REPLACING GLASS PERIMETER
ANTI-SWEAT HEATER
FOR MERCHANDISERS MANUFACTURED
BEFORE NOVEMBER 1999:
1. Follow the instructions for removing the
thermopane glass assembly.
2. Remove the perimeter heater from the glass
assembly, being sure to remove all the foil
backing.
3. Install the new heater on the glass assembly.
BE SURE THE WIRE ELEMENT RUNS
ALONG THE EDGE OF THE OUTER
PANE OF GLASS.
4. Reinstall the thermopane assembly and reconnect leads and power.
5. Verify heater is working properly.
Always disconnect the electrical power at the
main disconnect when servicing or replacing
any electrical component. This includes, but
is not limited to, such items as fans, heaters,
thermostats and lights.
!
WARNING
Heater
Heater
Outside
Glass
Bottom
Always Use Gloves
When Handling Glass!!
Page 32
P/N 0395730F
Low Temperature
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
6-9
FOR MERCHANDISERS MANUFACTURED
AFTER NOVEMBER 1999:
1. Follow the instructions for removing the
thermopane glass assembly.
2. The perimeter heater is imbedded in the glass
pane. Cut top wire off each end of the glass.
3. Install the new heater on the glass assembly.
BE SURE THE WIRE ELEMENT RUNS
ALONG THE EDGE OF THE OUTER
PANE OF GLASS.
4. Reinstall the thermopane assembly and reconnect leads and power.
5. Verify heater is working properly.
Connector
Glass Pane
Bottom
Heater
Heater
Outside
Glass
Bottom
"Outside" Label
Always Use Gloves
When Handling Glass!!
Page 33
P/N 0395730F
6-10 SERVICE
HUSSMANN CORPORATION, BRIDGETON, MO 63044-2483 U.S.A.
REPAIRING ALUMINUM COIL
The aluminum coils used in Hussmann
merchandisers may be easily repaired in the field.
Materials are available from local refrigeration
wholesalers.
Hussmann recommends the following solders and
technique:
Solders
Aladdin Welding Products Inc.
P.O. Box 7188
1300 Burton St.
Grand Rapids, MI 49507
Phone: 1-800-645-3413
Fax: 1-800-645-3414
X-Ergon
1570 E. Northgate
P.O. Box 2102
Irving, TX 75062
Phone: 1-800-527-9916
NOTE:
Hussmann Aluminum melts at .......1125°F
Aladdin 3-in-1 rod at ....................732°F
X-Ergon Acid core at.....................455°F
Technique
1. Locate Leak.
2. REMOVE ALL PRESSURE.
3. Brush area UNDER HEAT.
4. Use PRESTOLITE TORCH ONLY. NUMBER
6
TIP.
5. Maintain separate set of stainless steel
brushes and USE ONLY ON ALUMINUM.
6. Tin surface around area.
7. Brush tinned surface UNDER HEAT,
thoroughly filling the open pores around
leak.
8. Repair leak. Let aluminum melt solder,
NOT the torch.
9. Don’t repair for looks. Go for thickness.
10. Perform a leak check.
11. Wash with water.
12. Cover with a good flexible sealant.
NOTES:
Page 34
®
To obtain additional information or other support,
contact your Hussmann representative.
Please include the model and serial number of the product.
The full product warranty is available from our website,
www.hussmann.com
Hussmann Corporation, Corporate Headquarters: Bridgeton, Missouri, U.S.A. 63044-2483 01 July 2005
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