Hussmann SHM-4 Quick guide

January 2006
HUSSMANN - GLOVERSVILLE
INSTALLATION & SERVICE
INSTRUCTIONS
FOR
SHM
Specialty Horizontal Merchandisers
P/N OII – SHM
January 2006
First Call for help (US and Canada):
1-800-922-1919
Soporte Tècnico y Asistencia (Mèxico):
01-800-522-1900
For a Service Network Locator and other
Information visit us at
www.hussmann.com
select Worldwide Locations

Page 2
TABLE OF CONTENTS
Page
Inspection 3
Location 3
Skid, Leveling, Drains, Legs 3 & 4
Cleaning Exterior, Interior 4
Cleaning Stainless Steel Surfaces 4
SerialPlate 5
Power Requirements 5
ElectricalBox 5
PowerSwitch 5
DefrostTimeClock 6
Temperature Control 7
CondensingUnit 8
Shelves 8
Thermometer 8
Refrigeration 9
Evaporator Fan Motors 9

Page 3
GENERAL, INSTALLATION, CARE and CLEANING
GENERAL –
The Hussmann Models SHM have
been carefully designed to offer versatility
in the display of food items such as pre-
made sandwiches, fresh fruit, and vegeta-
bles, cheeses, and deli items.
So that you can realize maximum
benefit from this fine piece of equipment
we urge both you and your installer to
carefully read and follow this brief set of
instructions prior to installation of the
equipment.
INSPECTION –
The equipment has been skidded
and crated prior to shipment from the fac-
tory. It is the carrier’s responsibility to de-
liver it to you in good condition until such
time as you sign for it. Upon receipt of the
cabinet, examine the packaging for dam-
age. If the packing is damaged, make spe-
cific notation on the delivery ticket as to the
location and extent of damage prior to sign-
ing for the piece.
Carefully remove packaging and
examine the cabinet for damage. If dam-
age is found, contact the delivering carrier
immediately and request that his agent pre-
pare an inspection report for the purpose
of filing a claim. THIS IS YOUR RE-
SPONSIBILITY NOT THE FACTORY’S.
Save all packaging materials and move the
cabinet as little as possible prior to inspec-
tion.
LOCATION –
Avoid locating the cabinet where di-
rect sunlight would shine into the fixture or
where drafts from air conditioning grills,
fans, and open doors could affect its opera-
tion. A minimum distance of two feet
should be allowed in the front of the case to
allow proper free air movement to and from
the condenser for maximum operating effi-
ciency.
SKID -
The skid should be left on the cabinet
until it is near its final location. The skid
provides protection for both case and floor.
The skid is removed by raising one end of
the case approx. 6”, block securely and re-
move the 2 skid bolts on the raised end and
screw back into the holes 2 leg levelers.
The procedure is repeated on the op-
posite end. When the leg levelers are in
place, the case may be slid off the skid and
placed in its final location.
LEVELING –
The cabinet must be leveled properly
to insure full drainage of condensate water
from the evaporator coil. Level the case
from front to rear and end to end. Optional
legs can be provided for this purpose.
DRAINS -
Remote draining is not required in
self-contained models. The condensate wa-
ter from the evaporator drains out

Page 4
through the bottom of the cabinet into the
condensing unit compartment to a heated
condensate pan.
The pan uses a thermistor to sense
the presence of water in the pan and ad-
justs the amount of heat required to evapo-
rate the water. Care should be taken to
insure the drain hose is properly trapped
and in the pan.
LEGS – (optional)
If required by Health Inspectors the
levelers can be removed and replaced with
NSF Approved legs to raise the case 6
inches for cleaning purposes. An optional
skirt kit can be provided to snap on the
legs.
CARE and CLEANING – EXTERIOR –
When cleaning the exterior of the
cabinet, use a soft cloth or sponges with wa-
ter and a mild detergent. Rinse and wipe
dry. Do not use an abrasive cleanser on the
painted surfaces as this will mar the finish.
For plexiglass surfaces, use an ap-
proved plexiglass cleaner such as Craftics
20/20 Plasti-Cleaner
To check the interior drain – SHUT
OFF POWER TO THE CABINET! This
may be accomplished by turning off the
cabinet power switch or by turning off the
breaker located in the store electrical
panel. Remove the product from the cabi-
net. Lift up and remove the stainless steel
shelves. The drain is located in the center
of the interior bottom directly behind the
evaporator coil. Remove any pricing
Labels, product wrappers, etc., that may be
found over the drain opening. When fin-
ished checking, assemble cabinet in reverse
order, turn back on the power and allow
cabinet to pull down to proper operating
temperatures before restocking.
INTERIOR –
For cleaning the interior of the prod-
uct compartment, remove the product, dis-
connect the electrical power, and allow cabi-
net to warm to room temperature.
Use a soft cloth or sponge with a mild
detergent to wash the interior. The drain-
age area and drain should be checked to in-
sure that they have not become clogged.
If the condensate drain hose is re-
moved from the electric condensate pan for
cleaning, it must be reinstalled prior to op-
erating the case. Do not use an abrasive
cleanser on the painted surfaces as this will
mar the surface.
Wipe dry before restarting the cabi-
net. The time clock (see Electrical section)
should be reset to the correct time of day.
Allow the cabinet to cool down to proper
temperature before reloading product.
CLEANING STAINLESS STEEL
Generally soap and water will be suf-
ficient for most cleanings when done often
and regularly.

Page 5
If either a high or low voltage condition ex-
ists, contact your electrician, local power
company, or equipment manufacturer.
ELECTRICAL BOX –
The electrical box is located behind
the louvered access panel. The box contains
the items described below. On remote units
the box is used to bring the field supply to.
There is a grounding lug provided on these
models for grounding purposes.
POWER SWITCH –
The main power switch is located be-
hind the louvered access panel covering the
condensing unit compartment on the cus-
tomer side of the case.
This switch controls all power to the
case.
When necessary several cleaning agents
can be used. Some of them are Comet, Bab-O,
Liquid NuSteel, Cooper’s Stainless Steel
Cleaner, Allen’s Stainless Steel Cleaner, etc.
SERIAL PLATE –
The serial plate is located on the inte-
rior left wall of the cabinet. It contains all per-
tinent information such as model, cabinet se-
rial number, amperage rating, refrigerant type
and charge. This information will be needed to
install, service, or order parts for this piece of
equipment.
POWER REQUIREMENTS –
The SHM –3, 4, 5 & 6 use a 115/60/1
power source, with the SHM-3 and –4 models
using a 15 amp cord and the SHM-5 and –6
using a 20 amp cord. The SHM-8 requires
208/230-60/1 power and uses a 20 amp plug. It
is very important for the safety of you and
your customers to have each circuit grounded
properly.
A qualified electrician should perform
all wiring in accordance with the National
Electrical Code and/or all local codes
Separate circuits are recommended for
each case in order to prevent product loss due
to overloading or malfunction of other equip-
ment on the same circuit. Fuses or circuit
breakers should be supplied for each circuit.
For proper operation of equipment, voltage as
measured at the compressor must not vary
more than 5% from the cabinet serial plate
rating.
Temprature Control
Power Switch
Timer

Page 6
The cabinet power switch must be in the
OFF position before starting any cleaning or
service work on the equipment.
DEFROST TIME CLOCK –
The time clock, located in the electri-
cal box, provides a definite off-time so that
the evaporator will clear itself of frost.
The clock is provided with pins to
initiate defrost. The failsafe setting sets the
length of defrost (from 2 minutes minimum
to 110 maximum).
The clock is factory preset for 1 de-
frost per day at 40 minutes, which should be
sufficient for most applications.
Additional defrost may be required
for cases located in high humidity or high
usage cases. If possible, avoid setting a de-
frost during the day or peak usage periods.
The clock time pointer should be set to the
correct time of day when the cabinet is
ready to be started.
SETTING THE TIMER – Extra pins
are provided with the timer.
a. Put pin in the hole in dial face for the
time you wish cabinet to defrost. Note
that there is an AM and PM section on
the dial face. Be sure the pin is tight.
b. Set the length of time for the defrost
(failsafe). Push down on the adjustment
and slide it to the length of time. (Do not
set the time longer than 60 minutes.
c. Set the time pointer to the proper time of
day and start cabinet.

Page 7
START UP AND OPERATION –
It is important that the four previous
sections of this installation booklet have
been read and followed carefully before at-
tempting to start up the equipment.
A thorough inspection should be
made prior to start up to assure that there
are no loose nuts, bolts, electrical connec-
tions or refrigeration lines rubbing or chaf-
ing.
Turn the power switch to the ON po-
sition. Allow the system to reach normal
operating temperature prior to loading any
product in it.
This cabinet has a forced-air curtain that
flows over the top of the product. See
Shelves under this section for special load-
ing instructions.
Air flows out of the honeycomb dif-
fuser located above the product, across the
product, and into the return duct. The hon-
eycomb can be removed for cleaning.
TEMPERATURE CONTROL –
Interior cabinet temperatures are
controlled through the use of a bulb and
capillary type temperature control.
The body portion of the control is
located in the electrical enclosure. Access
to the enclosure is gained by removing the
louvered panel on the front of the cabinet.
If you have a BW version of the SHM, the
electrical enclosure is located behind the
louvered panel on the rear of the cabinet.
The sensing element of the control is lo-
cated on top of the evaporator coil fins of
the left end of the evaporator.
PRIOR TO PERFORMING ANY
SERVICE OR CONTROL REPLACE-
MENT, DISCONNECT THE POWER TO
THE CABINET.
The dial face of the control is adjust-
able from –10 to +50º. The control is fac-
tory pre-set at between 26 and 28ºto main-
tain interior cabinet temperatures of 35 to
40º. The control also has an adjustable dif-
ferential that determines the cut-in and the
cut-out temperature. This is adjustable
from 5 to 20º. The factory setting is 9º to
insure proper off time to keep the evapora-
tor from icing.
When replacing the control, make
sure to reseal the penetration in the cabinet
bottom to prevent moisture from leaking
through.
A picture of this control is on the
next page.
LOADLINE

Page 8
CONDENSING UNIT –
A regular program should be set up
for cleaning the fin-and-tube condenser.
Dust and dirt accumulation can cause seri-
ous efficiency loss.
Access is gained to the unit area by
removing the louvered grille. Before at-
tempting to slide out condensing unit you
must first remove the screws holding the
condenser baffles with a phillips screw
driver.
The unit slides forward to facilitate clean-
ing and for service. Care should be taken
when pushing the unit back in to insure
that the pullout coil does not become
kinked or damaged in some way. Double
check to make sure the drain hose is in the
drain pan before putting the access grille
back on. The rear access panel is also re-
movable if it is necessary to work at the
back of the case.
SHELVES –
The cabinet is equipped with shelves
for the display of your product. THERE IS
A 'LOAD LINE' LABEL ON THE BACK
WALL OF THE INNER LINER. DO
NOT
LOAD ABOVE THIS LINE AS
THE PRODUCT WILL BE IN THE DIS-
CHARGE AIR FLOW AND ADVERSELY
AFFECT THE CABINETS PERFORM-
ANCE
.
THERMOMETER –
A thermometer is provided that has
both Fahrenheit and Centigrade. The ther-
mometer is located in the back interior cor-
ner.
Its reading will be 5º to 7ºF warmer
than the discharge air off the honeycomb.
A solar powered thermometer is
provided with each cabinet. Temperature
display in Fahrenheit degrees is standard.
Celsius display is available as an option.
The thermometer is located in the cabinet
interior in the top left hand rear corner.
.
Differential
Penn A19-AHA-2D

To replace the thermometer, remove the two screws holding the thermometer to its
mounting bracket. Remove the sensing element from its clip. Install the
replacement thermometer in reverse order.
To clean the sensing element of the thermometer, follow replacement
procedure. Clean the element with a water and mild detergent solution. Make sure
the sensing element is wiped clean of any residue to ensure proper temperature
readings
REFRIGERATION –
The SHM 3, 4, 6 models use a R-134a refrigerant and the SHM-5 and –8
models use R-404A refrigerant. All models use a hermetic compressor.
The systems employ capillary tubes for refrigerant flow control. The
capillary tube is soldered to the suction line pull-out coil for proper heat exchange.
If the capillary should be come plugged or damaged for some reason IT IS BEST
TO REPLACE THE WHOLE HEAT EXCHANGER WITH A NEW ONE.
Consult the factory for the proper replacement.
Listed below are BTU requirements for the SHM series cabinets at a +20º F
evaporator and 110º F condenser temperature.
SHM-3 2900
SHM-4 3000
SHM-5 4400
SHM-6 5400
SHM-8 6400
The following pressures are optimum when the case is in a 75º to 80ºF ambient and
is running from 35º to 40ºF cabinet temperature and are for reference only:
SHM-3,4,6 SHM-5 –8
Head Pressure 110-120 psig Head Pressure 280-290 psig
Suction Pressure 15-20 psig Suction Pressure 36-40 psig
Consult the serial plate for the correct refrigerant charge. This charge is critical
and should be weighed in.
EVAPORATOR FAN MOTORS –
To replace an evaporator fan motor, the product must be removed from the
cabinet and the step shelves also removed. The shelves are only set in place.
Next, remove the plate covering the fans by removing the two screws holding
this in place. The fans are now accessible.
Page 9

WARRANTY
–
Please read carefully to assure prompt and
accurate service
Ordering Replacement Parts –
•
Contact your nearest
Hussmann Distributor.
•
Always specify model and serial number of cabinet.
•
If correct part number is not known, give a
clear description of part itself and its
function in the cabinet or remote unit.
Warranty Parts Procedure –
•
Same as items above
•
Give original installation date of cabinet and, if possible, forward a copy of the origi-
nal invoice or delivery receipt.
•
All shipments of in-warranty replacement parts
will be invoiced
from the factory un-
til such time as the defective part is returned and proved to be defective by our Qual-
ity Control Department.
•
Contact your Hussmann Distributor for instructions on returning in-warranty parts.
•
Warranty parts must be returned to the factory
within 30 days of date of failure to
assure proper disposition.
•
Lack of any of the above information may
result in the shipment of the wrong part,
or a delay in shipment.
Compressor Replacement Procedure –
•
Replacement compressors will not be shipped from the Hussmann factory. They
may be obtained from your nearest Copeland Wholesaler.
•
Your wholesaler will replace,
free
of
charge, any compressor found to be defective
within twelve months of installation, not to exceed twenty months from the date of
manufacture, as determined by the compressor serial number on the compressor se-
rial plate.
Page 10
•
For any defective compressor beyond the twelve or twenty month time period, a sal-
vage value credit
will
be given too partially
offset the invoice for the replacement.