Hussmann IMPACT LW User manual

IIMMPPOORRTTAANNTT!!
Keep in store for
future reference.
Low Temperature
Single Deck Wall & Island Merchandisers
Installation &
Operation Manual
Shipped With Case Data Sheets
P/N 0395730F
Impact Series
March 2005
Merchandisers
®

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. • [phone] • FAX [phone]
R
®
P/N 0395730F iii

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.

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 certi-
fied.
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 tempera-
ture 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 sun-
light, 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 mer-
chandisers 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
BE 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 unload-
ing.
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
!

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.
FAN
COIL FAN
COIL
Levels
Electrical
Raceway
Serial Plate
(Solid Front
Location)
Serial Plate
LWUG

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 merchan-
diser. To join unlike merchandisers, or merchandis-
ers of different temperature applications, an insulat-
ed 11/2in. (38 mm) partition kit is required.
Partition kits are shipped separately; instructions
are included with each kit.
ALL 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 factory-
installed with end kits. Insert
the internal joint trim, then
add the full-length
bumper.
Align each bumper sec-
tion with its retainer and
push into place, working
from the end of the line-
up. Install full length
bumpers and internal
joint trims offset across
joints. Make sure that no
gaps exist between sec-
tions. 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

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.
Lower Bumper
Corner
Upper Bumper
Lower Corner Bumper
Upper Corner Bumper
Miter Box
Bumper
Top Rails
Screws
Corner
Top Rail
Corner
Top Rails
Corner
Top Bumpers
Optional Stainless Steel Top Rail

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.
2
1
Glass
Top Rail
Corner
Glass Top Rail
Corner
Glass
Top Rail
Corner
Glass Trim
Glass Top Rails
Standard
Plastic Trim
Applying
Standard
Trim
OUTSIDE OF CASE

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 sec-
tion 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
Honeycomb
Retainer
Nut
Retainer
Screw
Acrylic
Guard
Rear Flue Glass / Honeycomb Retainer Assembly
LIG And LNG Models Only
Front Shelf
Support
Grille
Acrylic
Flue Glass
Glass
Trim
Channel

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 right-
hand 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 out-
let thoroughly. Seal both the inside and the out-
side. We recommend using an expanding
polyurethane foam insulation.
Multiplexing
Piping of merchandisers operating on the same
refrigeration system may be run from merchan-
diser 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.
WARNING
!
Splashguard brackets MUST be installed
before piping merchandiser.
CAUTION
!