Hussmann F-6 Service Manual

F-6 Multi-deck Frozen Food

Wall Merchandisers

IMPORTANT

Keep in store for
future reference!

Installation &

Service Manual

Shipped With Case Data Sheets

P/N 0518253_B

October 2013

English P/N 0518253

Spanish P/N 0538811

French P/N 0538812

INSTALLATION

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

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

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

Shipping Braces . . . . . . . . . . . . . . . . . . . . . 1-2

Exterior Loading . . . . . . . . . . . . . . . . . . . . 1-2

Merchandisers Shipped

With End Installed . . . . . . . . . . . . . . . . . 1-2

Anchoring . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Leveling . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Joining Instructions . . . . . . . . . . . . . . . . . . 1-3

Offsetting Bumpers and Top Rails . . . . . . 1-3

Splashguard Bracket and Joint Support . 1-6

REFRIGERATION / ELECTRICAL

Refrigerant . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Refrigerant Piping . . . . . . . . . . . . . . . . . . . 2-1

Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

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

Defrost Termination Thermostat . . . . . . . 2-2

Expansion Valve Adjustment . . . . . . . . . 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

Wiring Color Code . . . . . . . . . . . . . . . . . . 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

Ambient Air Filters . . . . . . . . . . . . . . . . . 4-1

Stocking . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Shelf Size and Location . . . . . . . . . . . . . . 4-2

Standard Shelves . . . . . . . . . . . . . . . . . . 4-2

Mezzanine Shelf . . . . . . . . . . . . . . . . . . 4-2

Bottom Rack . . . . . . . . . . . . . . . . . . . . . 4-3

Shelf Maximum Weight Limits . . . . . . . . 4-3

Load Limits . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Load Limit Profiles . . . . . . . . . . . . . . . . . . 4-4

Installing FDA/NSF Required

Thermometer . . . . . . . . . . . . . . . . . . . . 4-4

MAINTENANCE

Care and Cleaning . . . . . . . . . . . . . . . . . . . 5-1

Cleaning Ambient Air Filter . . . . . . . . . . 5-2

Cleaning Honeycomb Assemblies . . . . . . 5-2

Removing Pans and Interior Panels . . . . . 5-4

Cleaning Stainless Steel rails . . . . . . . . . . 5-5

Cleaning Coils . . . . . . . . . . . . . . . . . . . . . 5-5

Maintaining Fluorescent Lamps . . . . . . . 5-5

Cleaning Under Merchandisers . . . . . . . . 5-6

Removing Scratches from Bumper . . . . . . 5-6

Table of Contents continued on the next page...

P/N 0518253_B iii

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. & Canada 1-800-922-1919 • Mexico 1-800-890-8900

www.hussmann.com

© 2013 Hussmann Corporation

®

SERVICE

General . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Replacing Fan Motors and Blades . . . . . . 6-1

Evaporator Fans . . . . . . . . . . . . . . . . . . 6-2

Non-refrigerated Fans . . . . . . . . . . . . . . 6-3

Ambient Air Muffin Fans . . . . . . . . . . . 6-4

Replacing Modular Electric

Defrost Heater . . . . . . . . . . . . . . . . . . . . . 6-5

Replacing Electric Defrost Heater . . . . . . 6-6

Replacing Return Air Heater . . . . . . . . . . 6-7

Replacing Main Anti-Sweat

(Honeycomb Divider) Heater . . . . . . . . . 6-8

Replacing Optional Handrail

Anti-Sweat Heater . . . . . . . . . . . . . . . . . . 6-9

Replacing Fluorescent Lamps . . . . . . . . 6-10

Replacing Lamp Holders and End Caps 6-10

Replacing Electronic Ballasts . . . . . . . . . 6-11

Replacing Damaged Drain Fitting . . . . . 6-11

Repairing Aluminum Coil . . . . . . . . . . . . 6-12

WARRANTY

REVISION HISTORY

REVISION B — October 2013

1. Added warning box, page 1-1.

2. Added Maintaining Fluorescent Lamps,
page 5-5.

3. Added Cleaning Coils, page 5-5

3. Revised Replacing Fluorescent Lamps,
page 6-9.

REVISION A — November 2010
Original Issue

Table of Contents (Continued)

* * * * * * * * * * * * * * * * * * * * * * * * * *

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.

iv

P/N 0518253 _B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

!

!

!

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 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.

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.

The exterior frames on these cases provide space
for air circulation. However, in high ambient
conditions, sweating may still occur. If this hap­pens install a method of forced ventilation such
as a fan ventilation kit.

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

Exercise caution at all times when moving

merchandisers with “L” shaped riders.

They are top heavy and should

NEVER be left in the vertical position.

Do NOT walk on or store

flammable materials atop the unit.

WARNING

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

1-2 INSTALLATION

SHIPPING BRACES

Move the merchandiser as close as possible
to its permanent location and then remove
all pack aging. Check for damage before
discarding packaging. Remove all separately
packed accessories such as kits and shelves.

EXTERIOR LOADING

Do NOT walk on top of merchandisers or

damage to the merchandisers and serious
personal injury could occur. T

HEY ARE NOT

STRUCTURALLY DESIGNED TO SUPPORT EXCESSIVE

EXTERNAL LOADING

such as the weight of a

person. Do not place heavy objects on the case.

MERCHANDISERS SHIPPED
WITH END INSTALLED

If the case 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. T

HEREFORE, BE

SURE TO REPLACE THESE BOLTS WITH THE

SHORTER BOLTS PROVIDED

.

Be careful not to damage the factory-installed
end while moving the case. Make sure that
tools are positioned past the end and beneath
the merchandiser’s support bar.

ANCHORING

Because of the merchandisers' forward projec­tion, they must be anchored to the floor to
prevent them from tipping forward. Each
merchandiser should be lagged to the floor
through its rear skid. Anchors should be
placed approximately 8 to 12 in. (203 mm to
305 mm) from each end and in the center of
the rear skid. Some merchandisers have holes
in the rear skid for this purpose.
Once the merchandisers are properly anchored,
remove shipping braces.

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.

Do NOT remove shipping braces until the

merchandisers are properly anchored to the

floor. Merchandisers are top heavy and

could tip over causing serious injury.

Merchandisers must be braced before

removing the lag bolts.

WARNING

Use Levels Here

Shim

Notes:

•B

EGIN 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
merchan diser and the floor, a shim should be
placed in the center .

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 fixtures, a
joint kit is required. To join unlike fixtures, or
fixtures of different temperature applications, an
insulated partition kit is required. Joint and
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 Joint Instruction shipped with
case.

OFFSETTING BUMPERS AND TOP RAIL

Offsetting the bumpers and top rails helps to
disguise the joint locations, giving the lineup a
smoother look.

1. Locate short starter bumpers and top rail.

They are shipped with the left-end kit.

2. Remove factory installed top rails and

bumpers from cases as follows:

a

. To remove top rails, push rail toward

the back of the case with one hand
while lifting the top edge off the light
channel with the other hand. See
following drawing.

b

. Starting at one end, carefully peel

bottom of top rail free of color panel
and set the rail inside the case.

c. Remove upper and lower bumpers by

pulling bumper away from bumper
retainers. Be careful not to lose the
internal joint trims on the upper
bumpers.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 1-3

Push

Push

Lift

Pull

Pull

Upper
Bumper

Internal
Joint Trim

3. Starting at the left end of the line up,
install the upper bumper starter section
first. To install,

a. Position internal joint trims so that the

first is flush to the left-end panel and
the second is centered between the
starter bumper and the full length
bumper as shown below.

b. Install full length bumpers

and internal trims offset
across joints. Make sure
that no gaps exist between
sections. Continue installing
the upper bumpers the
length of the line up. Do
NOT install the last upper
bumper section at this time.
This section will be installed
in the last step.

4. Install lower bumper starter
and full length lower bumpers
by simply pushing them into
place. Start at the right end of
the line-up for additional cam­ouflage. There are no internal
joint trims on the lower
bumpers.

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

1-4 INSTALLATION

Internal
Joint Trims

Starter
Bumper

Splashguard
in place

Starter
Bumper at
Right End

Full
Length
Bumper

Full
Length
Bumper

Lower
Bumper

Upper
Bumper

Starter
Bumper

5. Return to the left end of the line up and
position the starter section of the top rail
as shown.

NOTE: The top rail should
not be installed until the
upper bumper is securely in
place.

6. Push the bottom portion of the short top
rail section down over the color panel. It
helps if you lift the top with your other
hand as shown. You will hear and feel the
trim “snap” into place.

NOTE: The
trim must
“snap” to
be properly
positioned.

7. Use one hand to push the top rail toward
the rear of the case while using the other
hand to “snap” the top section down over
the edge of the light channel as shown.

Again, be
sure it
“snaps”
into place.

8. Install full length top rails using the same
procedures. Continue installing the top rails
the length of the line up. Do NOT install
last section at this time.

9. Once all except the last sections of upper
bumper and top rail have been installed
refrigerate the case line up for at least six
(6) hours. The last sections of upper bumper

and top rail should be kept inside a refriger­ated case or cooler during this time. This

will allow the bumpers and top rails to
contract.

10. Go to the right end of the line up and tap
the top rail and bumpers to close any gaps.

11. Measure and cut last sections of top rail
and bumpers. Use a miter box and fine­tooth saw to cut last bumpers and top rail
to length. Install the last sections.

Note: If part of plastic top rail pops loose,
remove that section of top rail and re-install
according to Steps 6 and 7 above. Trying to re­install only the popped part may not secure the
top rail, and may damage the top rail, color
panel and light channel.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 1-5

Push

“Snap”

Lift

Bumper

Push

Push

“Snap”

Miter Box

SPLASHGUARD BRACKET
AND JOINT SUPPORT

Install Splashguard Bracket

Position splashguard brackets to the merchan­diser and level to the floor. Each bracket has a
slot at the rear of the bracket where it attaches
to the merchandiser. Tighten screws to secure
the brackets.

Install Splashguard Joint Support

Position the joint support across the brackets
as shown below. Fasten with sheet metal

screws.

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

1-6 INSTALLATION

Bracket

Base of Case

Screw

Joint Support

REFRIGERANT

The correct type of refrigerant will be
stamped on each merchandiser’s serial plate
located on the left-hand end of the interior
top liner. The case 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 case.

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 D

O NOT RUN

REFRIGERANT 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.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 2-1

REFRIGERATION / ELECTRICAL

Splashguard brackets MUST be installed

before piping case.

Refrigeration lines are under pressure and
should be depressurized before attempting

to make any connections.

WARNING

CAUTION

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.

REFRIGERATION THERMOSTAT

The refrigeration thermostat body is located in
the electrical wireway. The bulb, when factory
installed, is located in the discharge flue.

DEFROST TERMINATION THERMOSTAT

The standard disc type defrost termination
thermostat is not adjustable. This thermo­stat is clamped to the coil inlet tube.

EXPANSION VALVE ADJUSTMENT

Expansion valves must be adjusted to fully
feed the evaporator. Before attempting to
adjust valves, make sure the evaporator is
either clear or only lightly covered with frost,
and that the fixture is within 10°F of its
expected operating temperature. Adjust valves
as follows.

Attach two (2) sensing probes (either thermo­couple or thermistor) to the evaporator. Put
one under the clamp holding the expansion
valve bulb and securely tape the other to the
coil inlet line.

Some “hunting” of the expansion valve is
normal. The valve should be adjusted so that
during the hunting the greatest difference

between the two probes is 3–5°F (1.7–2.7°C).

With this adjustment, during a portion of the
hunting, the temperature difference between
the probes will be less than 3°F (1.7°C). Make
adjustments of no more than one-half (

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.

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 wireway and to the rack control
panel. Leads are tagged in the wireway.

2-2 REFRIGERATION / ELECTRICAL

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

MERCHANDISER ELECTRICAL DATA

Merchandiser data sheets for specific models
are shipped with this manual. The data sheets
provide case electrical data, electrical schematics,
parts lists and performance data. Refer to the
merchandiser data sheets and case serial plate
for electrical infor mation.

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 merchan disers 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 wireway on the
serial plate side of the case (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 wireway.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 2-3

WIRING COLOR CODE

Leads for all electrical circuits are identified by 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

DARK BLUE ..DEFROST TERM. THERMOSTAT MAROON...RECEPTACLES

PURPLE........CONDENSATE HEATERS YELLOW ....DEFROST HEATERS 120V

BROWN ........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

THESE ARE MARKER COLORS WIRES MAY VARY.

NOTES

2-4 REFRIGERATION / ELECTRICAL

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

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 case front). A
water seal is supplied with each fixture. The
water seal must be installed at the waste outlet
to prevent air leakage and insect entrance into
the fixture.

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.

The Water Seal Must Be Level

The residual defrost water in the water seal is a
barrier that will prevent air movement through
the drip piping. Condensation and frost may
form if a water seal is improperly installed.

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.

1. Never use drip piping smaller than the
nominal diameter of the pipe or water seal
supplied with the merchandiser.

2. 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.

D

OUBLE WATER SEALS IN SERIES WILL CAUSE

AN AIR LOCK AND PREVENT DRAINING

.

3. Pitch the drip piping in the direction of flow.
There should be a minimum pitch of 1/4 in.
per ft (20 mm per 1 m).

4. Avoid long runs of drip piping. Long runs
make it impossible to provide the pitch
necessary for good drainage.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 3-1

DRIP PIPING AND SPLASHGUARDS

Splashguard brackets MUST be installed before

piping case.

a

CAUTION

Front of Case

Field Installed
Water Seal

Center of Case

Waste Outlet

Base of C

3-2 DRIP PIPING AND SPLASHGUARDS

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

5. 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.

6. Prevent drip pipes from freezing:

A. Do NOT install drip pipes in contact
with uninsulated suction lines. Suction lines
should be insulated with a non-absorbent
insulation material.

B. 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.

INSTALLING SPLASHGUARDS

The splashguard and brackets are shipped
inside each case.

Install splashguard brackets before piping case.
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 splashguard.

To Install Splashguards:

1. Check to be sure that all splashguard
brackets are level with the floor.

2. Position top of splashguard over the top
edge of the bracket as shown below.

3. Push the lower edge of the splashguard
toward the bottom of the bracket until it
snaps into place.

SEALING SPLASHGUARD TO FLOOR

I

F REQUIRED by local sanitation codes, or if

desired by the customer, plastic splashguards
may be sealed to the floor using silicone type
sealer. The amount needed will depend on how
much the floor is out of level.

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 silicone type sealer along the
bottom of the splashguard. Sealant must
be removed and replaced when servicing.

O

PTIONAL 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. D

O 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.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 3-3

Splashguard

Silicone-type
Sealer

Splashguard

Cement

Cove Trim

NOTES

3-4 DRIP PIPING AND SPLASHGUARDS

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 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. D

O NOT REMOVE THE CAP ON THE

TEVS. This cap is to be removed only for valve

disassembly. Removal of this cap during case
maintenance will result in refrigerant loss
unless the system is first isolated and the
refrigerant recovered.

The TEV has been factory set to provide the
recommended performance settings as specified
on the merchandiser data sheets.

AMBIENT AIR FILTERS

The ambient air filters on top of the case should
be checked for possible debris accumulated
during construction, shipping and installation.
Refer to Care and Cleaning in Section 5 –

Maintenance.

STOCKING

Product should NOT be placed in merchandisers
until case is at proper operating temperature.

Display cases are not intended to freeze foods,
but to maintain frozen foods at the proper
temperature while displayed. 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 unapproved shelving,
baskets, display racks, or any accessory that
could hamper air curtain performance.

DO NOT BLOCK AIR GRILLE.

START UP / OPERATION

Removal of the TEV cap will result in

refrigerant loss unless the system is first

isolated and the refrigerant recovered.

Ambient Air Filter on Top Front of Case

At no time should merchandisers be

stocked beyond the load limits indicated.

Improper stocking can cause poor

performace that results in spoiled food.

CAUTION

CAUTION

WRONGCORRECT

COLD AIR

COLD AIR CURTAIN

Load Limit

F6L F6L

CURTAIN

Load Limit

SHELF SIZE AND LOCATION

Standard Shelves

All shelves and racks are 48 in. (1219 mm)
wide. The standard shelf depth is 22 in.
(559 mm) in F6 and F6L cases. At least three,
but not more than five, 22 in. (559 mm)
standard shelves must be used in each F6 or
F6L case. The standard shelf cannot be the
lowest shelf in either F6 or F6L cases.

Each standard front (F6) case must have
no more than 16 open slots below the
lowest standard shelf. Each low front
(F6L) case must have no more than
12 open slots below the lowest standard
shelf.

Mezzanine Shelf

The mezzanine, or lowest shelf depth
may be 18, 16, or 14 in. (457, 406, or
356 mm). This shelf must be positioned
below the lowest standard shelf.

4-2 START UP / OPERATION

P/N 0518253_A U.S. & Canada 1-800-922-1919 • Mexico 1-800-522-1900 • www.hussmann.com

d

Shelf Placement

Do NOT store flammable

materials atop the unit.

Mezzanine

Shelf

Product

Stop

3 to 5
Standar
Shelves

16 Open
Slots

Mezzanine

Wire Rack

with Lip

Shelf

Display Pan

F6

3 to 5
Standard
Shelves

12 Open
Slots

Display
Pan

F6L

Bottom Rack

Standard front (F6) cases use a telescoping
wire rack with a 3 in. (76 mm) acrylic product
stop mounted on the product side of the return
grille, angled toward the product.

Low front (F6L) cases should not use the tele­scoping rack. Instead, F6L cases use a wire
rack with a built-in wire lip product stop in
one of three heights: 2, 6, or 12 in. (51, 152, or
305 mm).

SHELF MAXIMUM WEIGHT LIMITS

Hussmann merchandiser shelves are designed
to support the maximum weight load limits as
indicated in the table below.

Exceeding these maximum weight load limits
may cause damage to the shelf or shelves,
damage to the merchandiser, damage to store
products, and potentially create a hazardous
condition for customers and staff. Exceeding
the indicated maximum weight load limits con­stitutes misuse as described in the Hussmann
Limited Warranty.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 4-3

Do not put heavy objects on case

because it could lead to structural damage.

NOTICE

Weight Limits for F6 Merchandiser Shelving

Nominal Shelf Depth

14 in. (357 mm)

16 in. (405 mm)

18 in. (457 mm)

20 in. (508 mm)

22 in. (559 mm)

*Shelf load limits at 0º tilt

Maximum Load Limit

125 lb (56.7 kg)

200 lb (90.7 kg)

200 lb (90.7 kg)

250 lb (113.4 kg)

250 lb (113.4 kg)

LOAD LIMITS

Each merchandiser has a load limit decal.
Overstocking will adversely affect product
temperature and case efficiency. Recommended
load limit profiles are shown below.

LOAD LIMIT PROFILES

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.

4-4 START UP / OPERATION

P/N 0518253_A U.S. & Canada 1-800-922-1919 • Mexico 1-800-522-1900 • www.hussmann.com

LOAD LIMIT

Load Limit

Load Limit

F6L F6

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 4-5

This is an NSF-7 &

US FDA Food Code

Required

Thermometer

Thermometer – Hussmann Part TM.4911251

)VTTNBOO$PSQPSBUJPOr4U$IBSMFT3PDL3PBEr#SJEHFUPO.0

64$BOBEBr.FYJDPrXXXIVTTNBOODPN

¥)VTTNBOO$PSQPSBUJPO

Suggested Mounting Locations

in Single Deck Glass Front

Impact Merchandisers

– Acrylic

1BDLBHF(VBSE
'BDJOH0VU

Double Stick Tape

'MFYJCMF1MBTUJD

Fits in Price Tag
Moldings

Hussmann P/N 0429971_C 10/2007

– Inside
End Panel

– Shelf
Price Tag
Molding

m3FUVSO"JS(SJMMF

Suggested Mounting Locations
in Multi-deck Merchandisers

4-6 START UP / OPERATION

P/N 0518253_A U.S. & Canada 1-800-922-1919 • Mexico 1-800-522-1900 • www.hussmann.com

Important – Please read!

This thermometer is provided in response to United States

Food and Drug Administration (US FDA) Food Code [ http://www.fda.gov/ ]

National Sanitation Foundation (NSF / ANSI) Standard 7 [ http://www.nsf.org/ ]

and

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 with 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 plsatic 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 officals.

Keep with merchandiser

or give to store manager.

DO NOT DESTROY.

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. N

EVER 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.

Do 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.

Do:

• 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. D

O NOT USE STEAM OR HIGH WATER

PRESSURE HOSES TO WASH THE INTERIOR

. THESE

WILL DESTROY THE MERCHANDISERS

’ SEALING

CAUSING LEAKS AND POOR PERFORMANCE

.

• Lift hinged fan plenum for cleaning. Hook
chain in rear panel to secure plenum during
cleaning. B

E 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.

NEVER INTRODUCE WATER FASTER THAN THE

WASTE OUTLET CAN REMOVE IT

.

• Allow merchandisers to dry before resuming
operation.

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

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.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_A 5-1

MAINTENANCE

SHUT POWER OFF DURING CLEANING PROCESS.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

WARNING

WARNING

CLEANING AMBIENT AIR FILTER

For proper refrigeration performance, the
ambient air filters should be cleaned or
replaced at least every six months. The filters
are located on top of the case and measure 36
x 4 x

1

/4inches (914 x 102 x 6.4 mm). There are
two filters in an 8 ft (2438 mm) case, three
filters in a 12 ft (3658 mm) case, and one filter
in a 4 or 6 ft (1219 or 1829 mm) case.

The metal mesh filter can be lifted out without
tools. If preferred, the filter and its frame can
be removed together by removing sheetmetal
screws holding the frame. Gently shake the
filter to remove loose debris, then wash the fil­ter with soap and hot water. Allow to dry com­pletely before re-installing.

Replacement filters should be UL Class II type
filters.

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 ASSEMBLIES

Honeycombs should be cleaned every six
months. Dirty honeycombs will cause mer­chandisers to perform poorly. The honeycombs
may be cleaned with a vacuum cleaner. Soap
and water may be used if the honeycomb is
removed from the case.

Damaged honeycombs should be replaced.

5-2 MAINTENANCE

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

Screws

Filter

Front of Case

End and gaskets removed for clarity

Front —

Ambient Air
Honeycomb

Center —

Non-refrigerated Air

Honeycomb

Rear —

Main Air

Honeycomb

Front of

Case

Filter

These models have three honeycombs. Begin
with the center honeycomb. Work carefully—a
damaged honeycomb will cause merchandisers
to perform poorly. Use a needle-nose plier to
grasp one cell membrane near one corner, Pull
gently until the bottom of the corner clears the
retainer. Move the plier further along and
repeat until fingers can grasp the side of the
honeycomb. Remove the honeycomb.

Remove the front honeycomb using the same
technique.

Remove screws in the divider heater before
removing the main air honeycomb at the rear.
Use care to prevent damage to the foil bonded
heater or wiring.

Clean the honeycombs with soap and water. Be
careful not to damage honeycombs. When
completely dry, re-install honeycombs in
retainers.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_A 5-3

Screws

Divider Heater

Rear —

Main Air

Honeycomb

REMOVING PANS AND
INTERIOR PANELS

All interior shelves, drip pans, and shelf
support panels may be lifted out without tools.

Rear 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.

5-4 MAINTENANCE

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

E

B

A

CLEANING STAINLESS STEEL RAILS

Use non-abrasive cleaning materials, and
always polish with grain of the steel. Use warm
water or add a mild detergent to the water and
apply with a cloth. Always wipe rails dry after
wetting.

Use alkaline chlorinated or non-chlorine
containing cleaners such as window cleaners
and mild detergents. Do not use cleaners
containing salts as this may cause pitting and
rusting of the stainless steel finish. Do not use
bleach.

Clean frequently to avoid build-up of hard,
stubborn stains. A stainless steel cleaning
solution may be used periodically to minimize
scratching and remove stains.

Rinse and wipe dry immediately after cleaning.
Never use hydrochloric acid (muriatic acid) on
stainless steel.

CLEANING COILS

NEVER USE SHARP OBJECTS AROUND
COILS. Use a soft brush or vacuum brush to
clean debris from coils. Do not puncture coils!

Do not bend fins. Contact an authorized serv­ice technician if a coil is punctured, cracked, or
otherwise damaged.

ICE in or on the coil indicates the refrigeration
and defrost cycle is not operating properly.
Contact an authorized service technician to
determine the cause of icing, and to make
adjustments as necessary. To maintain product
integrity, move all product to a cooler until
unit has returned to normal operating
temperatures.

MAINTAINING FLUORESCENT LAMPS

Fluorescent lamps should not be allowed to
run to failure. If a re-lamp schedule is not in
place, the tubes should be inspected for signs
of degradation (blackened ends). Degraded or
failed tubes should be replaced.

Allowing severely degraded lamps to operate
may cause a ballast failure or could expose the
lamp holder to excessive heat. Replacing
degraded bulbs is more cost effective than
replacing ballast and lamp-holders.

Traditional re-lamp programs are 18- to 24­month intervals. In the absence of a re-lamp
program, a yearly inspection of the lightning
system is recommended.

1. Inspect all lamp sockets and plug–recepta­cle connections for signs of arcing. Replace
any component that shows signs of arcing.

2. Make sure all unused receptacles have their
close-off covers securely installed.

3. Make sure proper cleaning procedures are
followed. Lights and fans MUST be turned off
when a case is cleaned and MUST be allowed
to dry before turning power back on.

4. Do not use a pressure nozzle to clean
inside a case.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 5-5

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.

5-6 MAINTENANCE

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

GENERAL

See the case data sheet set for wiring diagrams
and other detailed information on specific
fans and heaters. The illustration below
identifies the various fans, heaters and
thermostats.

Always move food product from case to freezer
when power to case is turned off. Do not
allow product to sit in a non-refrigerated
area.

REPLACING FAN MOTORS AND BLADES

Should it ever be necessary to service or
replace the fan motors or blades be certain that
the fan blades are re-installed correctly. T

HE

BLADES MUST BE INSTALLED WITH RAISED

EMBOSSING

(PART NUMBER ON PLASTIC BLADES)

POSITIONED AS INDICATED ON THE PARTS LIST

OF THE DATA SHEET

.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 6-1

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.

WARNING

Ballast

Ambient Air
Muffin Fan

Main Anti-Sweat Heater

Fluorescent Lamp

Optional
Hand Rail
Heater

Optional
Adjustable
Refrigeration
Thermostat

Non-refrigerated
Reversing Fan

Standard
Electric
Defrost
Thermostat

Ballast

Return Air Heater

Defrost Heater

Fluorescent Lamp

Evaporator Fan

Defrost Heater

Heater Limit
Thermostat

Evaporator Fans

For access to these fans:

1. Turn off power.

2. Remove bottom display racks and pans.

3. Remove screws on both ends of the plenum
assembly.

4. Free the plenum assembly from the caulk at
both ends of the assembly. Rotate the
assembly forward and to rest in the case.

5. Disconnect fan from wiring harness. The fan

wiring harness is sealed at the left front of
the case. Cut the fan wiring at the left end,
leaving sufficient wire to connect the new
fan.

6. Remove screws holding fan basket to
plenum. Fan blade may be removed after
fan assembly is removed from plenum.

7. Remove screws holding bottom of motor
to fan basket.

8. Replace fan motor and blade in fan basket.

9. Reinstall fan basket in plenum.

10. Reconnect fan wiring at the left end. Follow
NEC and UL approved methods.

11. Reposition plenum assembly in caulk and
replace screws at each end of plenum
assembly.

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

6-2 SERVICE

Caulk

Sealant

— 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.

WARNING

12. Turn on power.

13. Verify that motor is working and blade is
turning in the correct direction.

Non-refrigerated Fans

For access to these fans:

1. Turn off power.

2. Remove bottom display racks and pans.

3. Remove screws and cover, exposing fan
assembly.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 6-3

Screws

Non-Refrigerated Reversing Fan

with Cover Removed

— 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.

Motor
Lock Nut
Tool

Nut

Fan Blade

Gasket

Screws

WARNING

Tape

MotorBracket

Non-refrigerated Fans (Continued)

3. Disconnect fan from wiring harness. The fan

wiring harness is sealed at the left front of
the case. Cut the fan wiring at the left end,
leaving sufficient wire to connect the new
fan.

4. Remove fan blade.

5. Remove screws holding bottom of motor to
fan basket.

6. Replace fan motor and blade.

7. Reconnect fan wiring at the left end. Follow
NEC and UL approved methods.

8. Replace cover and screws.

9. Turn on power.

10. Verify that motor is working and blade is
turning in the correct direction.

Do not operate fans without covers!

Ambient Air Muffin Fans

For access to these fans:

1. Turn off power.

2. Remove ambient air filter.

3. Disconnect fan from wiring harness.

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

6-4 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.

Speed Nut

Fan Blade

Washer

Motor

Basket

WARNING

4. Remove and replace muffin fan assembly.

Airflow arrow must point toward plenum.

5. Reconnect fan to wiring harness.

6. Replace ambient air filter.

7. Turn on power.

8. Verify that motor is working and blade is
turning in the correct direction.

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.

2. Remove wire display racks and bottom
display pans from the section of the
compartment being serviced.

3. Remove screws on both ends of the plenum
assembly. Free the plenum assembly from
the caulk at both ends of the assembly.
Rotate the assembly forward to rest in the
case.

4. Unplug the heater from the heater
wiring harness.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 6-5

— 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.

WARNING

Screws

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.

8. Turn on power.

9. Verify that heater is working properly.

REPLACING ELECTRIC DEFROST

HEATER

These full-length heaters are attached to
the front of the coils. They may be
accessed by removing the fan plenums. To
replace:

1. Turn off power.

2. Remove wire display racks and bottom
display pans from the entire case.

3. Cut the heater from the heater wiring
harness.

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

6-6 SERVICE

Modular Defrost Heater

Wiring Harness

Sealant

— 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.

Heater

Coil

Clip

Heater

Coil Fin

Bracket

Clips to be located 5 to 6 inches from bracket

Coil Tube

WARNING

4. Remove the heater from the face of
the frost collector by loosening or
removing screws in the attachment
clips.

5. Install new heater.

6. Reconnect heater wiring at the left end.
Follow NEC and UL approved methods.

7. Turn on power.

8. Verify that the heater is operating
correctly.

REPLACING RETURN AIR HEATER

The return air heater is located in front of the
case under the return air grille.

To replace the heater:

1. Turn off power to fan/anti-sweat heater
circuit.

2. Remove wire display racks and bottom
display pans.

3. Remove return air grille.

4. Unplug the heater lead.

5. Remove the foil barrier tape and remove
the heater.

6. Install new heater, being sure to thoroughly
clean the surface and to install new foil
barrier tape.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 6-7

Screws

— 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.

WARNING

REPLACING MAIN ANTI-SWEAT

(HONEYCOMB DIVIDER) HEATER

The main divider anti-sweat heater is located in
front of the rear case honeycomb.

To replace the heater:

1. Turn off power.

2. Remove screws.

3. Remove divider.

4. Unplug the anti-sweat heater lead.

5. Remove the foil barrier tape from the back
of the divider and remove the heater.

6. Install new heater, being sure to thoroughly
clean the back surface of the divider and to
install new foil barrier tape.

7. Plug in heater and reinstall divider.

8. Turn power on.

9. Verify heater is working properly.

REPLACING OPTIONAL HANDRAIL
ANTI-SWEAT HEATER

The optional handrail anti-sweat heater is located
in front of the case under the handrail.

To replace the heater:

1. Turn off power.

2. Remove screws holding stainless steel hand
rail and turn rail to expose heater.

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

6-8 SERVICE

Screws

Stainless Steel
Top Rail

Four Screws per
4 ft (1219 mm)

Adhesive
Foil

3. Unplug the anti-sweat heater lead.

4. Remove the foil barrier tape from the
bottom of the rail and remove the heater.

5. Install new heater, being sure to thoroughly
clean the bottom surface of the rail and to
install new foil barrier tape.

6. Plug in heater and reinstall hand rail.

7. Turn power on.

8. Verify heater is working properly.

Note: Optional handrail heaters are full-length
4, 6, 8 or 12 ft (1219, 1829, 2438 or 3658 mm)
and either 120V or 220V.

REPLACING FLUORESCENT LAMPS

Fluorescent lamps are furnished with moisture
resistant lamp holders, shields and end caps.
Whenever a fluorescent lamp is replaced, be
certain to reinstall the lamp shields and end
caps.

The switch in the canopy operates both the
canopy and the shelf lamps. The rail lamp
switch is located on the rail.

Inspect all lamp sockets and plug–receptacle
connections for signs of arcing. Replace any
component that shows signs of arcing.

Make sure all unused receptacles have their
close-off covers securely attached.

REPLACING LAMP HOLDERS AND

END CAPS

The Hussmann lamp holder is designed to
snap into the sheet metal of the case. The lamp
holder has a locking ‘nub’ which fits inside the
groove of specially designed end caps.

IMPORTANT!

Always replace lamp holders and end caps
with Hussmann lamp holders and end caps.

Use of non-Hussmann parts may result in
poor electrical contact and short lamp life.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 6-9

Hussmann
End Cap

Plastic Shield

End Cap

Lamp Holder

Nub

Groove

Hussmann
Lamp Holder

REPLACING ELECTRONIC BALLASTS

Canopy Ballast

The canopy ballast is located on top of the case,
to the left of the muffin fans.

To gain access:

1. Turn off power.

2. Remove ambient air filter.

3. Unplug wires in ballast with tool that will
release the wires.

4. Remove and replace ballast.

5. Reconnect the ballast wires.

6. Replace ambient air filter.

7. Turn on power

8. Verify proper operation of ballast.

Rail Lamp Ballast

The rail lamp ballast is located in the raceway,
behind the lower front panel at the left-hand
end of the merchandiser. NOTE: The switch
for the rail lamp is separate from the canopy
and shelf lighting. The rail lamp switch is
located on the rail.

To gain access:

1. Turn off power.

2. Remove the lower front panel by lifting it
up and out.

3. Remove screws attaching the raceway cover,
then remove cover.

4. Service or replace ballast as required.
Reassemble items as they were originally
installed.

5. Reconnect the electrical power.

6. Verify proper operation.

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

6-10 SERVICE

Muffin Fan

Ambient Air Filter

Ballast

MAIN ELECTRICAL CONNECTIONS

The main case connection access is at the top
left end of the case.

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.

Low Temperature

Multi-deck Frozen Food

HUSSMANN CORPORATION, Bridgeton, MO 63044-2483 U.S.A.

P/N 0518253_B 6-11

Drain Fitting

Viewed from Inside Merchandiser

End Section View

Rear of Case

Foam Bottom
Assembly

Modified
Drain Fitting

PVC Adapter
1-1/2 x 1-1/4 in.
(38 x 32 mm)
(obtained at local
building supply store)

Tee 1-1/4 in.
(32 mm) TxSxS

Drain Fitting

Viewed from Inside Merchandiser

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: [phone]
Fax: [phone]

X-Ergon

1570 E. Northgate
P.O. Box 2102
Irving, TX 75062

Phone: [phone]

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.

P/N 0518253_B U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

6-12 SERVICE

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