Hussmann microSC SHM-A Series User manual

SHM-A
Medium Temperature Self Contained
Horizontal Merchandiser
with R-290 Refrigerant
Installation &
Operation Manual
P/N 3104942_B
February 2020
Spanish 3104949
MANUAL- I/O SHM-A
®
Æ
WARNINGS:
If the information in these instructions are not followed
exactly, a fire or explosion may result, causing property
damage, personal injury or death.
Installation and service must be performed by a qualified
installer or service agency.
READ THE ENTIRE MANUAL BEFORE
INSTALLING OR USING THIS EQUIPMENT.
The unit uses R-290 gas as the refrigerant. R-290 is
flammable and heavier than air. It collects first in low
areas but can be circulated by the fans. If propane gas
is present or even suspected, do not allow untrained
personnel to attempt to find the cause. The propane
gas used in the unit has no odor.The lack of smell does
not indicate a lack of escaped gas. If a leak is detected,
immediately evacuate all persons from the store, and
contact the local fire department to advise them that
a propane leak has occurred. Do not let any persons
back into the store until the qualified service technician
has arrived and that technician advises that it is safe to
return to the store. No open flames, cigarettes or other
possible sources of ignition should be used inside or in
the vicinity of the units.
FAILURE TO ABIDE BYTHIS WARNING COULD
RESULT IN AN EXPLOSION, DEATH, INJURYAND
PROPERTY DAMAGE.
IMPORTANT
Keep in store for future reference!

P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 1 800-890-2900 • www.hussmann.com
ii
BEFORE YOU BEGIN
Read these instructions completely and carefully.
PERSONAL PROTECTION EQUIPMENT (PPE)
Personal Protection Equipment (PPE) is required whenever installing or servicing this
equipment. Always wear safety glasses, gloves, protective boots or shoes, long pants, and a
long-sleeve shirt as required when installing or servicing this equipment.
1. If the information in these instructions are not followed exactly, a fire or explosion may result, causing property damage, personal injury
or death.
2. Installation and service must be performed by a qualified installer or service agency.
3. This unit is designed only for use with R-290 gas as the designated refrigerant.
THE REFRIGERANT LOOP IS SEALED. ONLY A QUALIFIED TECHNICIAN SHOULD ATTEMPT TO SERVICE!
• Propane is flammable and heavier than air.
• It collects first in the low areas but can be circulated by the fans.
• If R-290 is present or even suspected, do not allow untrained personnel to attempt to find the cause.
• The propane gas used in the unit has no odor.
• The lack of smell does not indicate a lack of escaped gas.
• If a leak is detected, immediately evacuate all persons from the store, and contact the local fire department to advise them that a
pro pane leak has occurred.
• Do not let any persons back into the store until the qualified service technician has arrived and that technician advises that it is
safe to return to the store.
• A hand-held propane leak detector (“sniffer”) shall be used before any repair and/or maintenance.
• No open flames, cigarettes or other possible sources of ignition should be used inside the building where the units are located
until the qualified service technician and/or local fire department determines that all propane has been cleared from the area and
from the refrigeration systems.
• Component parts are designed for propane and non-incendive and non-sparking. Component parts shall only be replaced with
identical repair parts.
FAILURE TO ABIDE BY THIS WARNING COULD RESULT INAN EXPLOSION, DEATH, INJURY AND PROPERTY DAMAGE.

P/N 3104942_B iii
ANSI Z535.5 DEFINITIONS ............. vi
INSTALLATION
UL Listing .............................1-1
Federal / State Regulations ................1-1
Hussmann Product Control .............. 1-1
Shipping Damage ...................... 1-1
Location .............................. 1-1
Self Contained Location ................. 1-2
Model Description ..................... 1-3
Unloading ............................ 1-3
Exterior Loading ....................... 1-3
Shipping Skid ......................... 1-3
Merchandiser Leveling .................. 1-4
Optional Legs ......................... 1-4
Serial Plate Location .................... 1-4
Refrigeration Unit Access ................ 1-4
Sealing Merchandiser to Floor ............ 1-4
Self-Contained Refrigeration Equipment
Start Up Check List .................... 1-7
ELECTRICAL / REFRIGERATION
Merchandiser Electrical Data ............. 2-1
Field Wiring ........................... 2-1
Electrical Connections . . . . . . . . . . . . . . . . . . . 2-1
Electrical Outlet ........................ 2-1
Refrigeration (Self Contained) ............ 2-1
Refrigeration System Views .............. 2-2
Before Beginning a Service or Repair ....... 2-3
Replacing Refrigeration System Components 2-4
Steps to Recover Refrigerant ............. 2-5
Charging ............................. 2-5
Waste Outlet and Water Seal ............. 2-5
START UP / OPERATION
Controller Operation .................... 3-1
Key Function .......................... 3-2
Further Information .................... 3-3
Connections ........................... 3-4
LED ................................. 3-5
KDE PLUS Buttons .................... 3-6
Setpoint .............................. 3-7
Sensor to Control Configuration............3-8
Controls Adjustments ................... 3-9
Start Up ............................. 3-10
Load Limits .......................... 3-10
Stocking ............................. 3-10
Thermometer ......................... 3-10
MAINTENANCE
Care and Cleaning ...................... 4-1
Cleaning Discharge Honeycomb .......... 4-2
Cleaning Stainless Steel Surfaces .......... 4-2
Cleaning Under Step Pan ................ 4-2
Cleaning Thermometer .................. 4-3
Cleaning Coils ......................... 4-3
Cleaning Evaporation Pan ............... 4-4
Removing Scratches from Bumper ......... 4-4
SERVICE
Replacing Fan Motors and Blades ......... 5-1
Replacing Evaporation Fan Motors ....... 5-2
Replacing Food Compartment Fan Motors ..5-3
WARRANTY
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 1-800-890-2900
www.hussmann.com
© 2020 Hussmann Corporation

P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 1 800-890-2900 • www.hussmann.com
iv
REVISION HISTORY
REVISION B
Updated Warnings
ORIGINAL ISSUE — FEBRUARY 2020
* * * * * * * * * * * * * * * * * * * * * * * * * *
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.
Merchandiser must operate for 24 hours
before loading product!
Regularly check merchandiser temperatures.
Do not break the cold chain. Keep products
in freezer before loading into merchandiser.
These merchandisers are designed
for only pre-frozen products.
AT TENTION
Merchandiser must operate for 24 hours
before loading product!
Regularly check merchandiser temperatures.
Do not break the cold chain. Keep products in
cooler before loading into merchandiser.
These merchandisers are designed
for only pre-chilled products.
— 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.
Case ventilation openings must be clear of any
obstructions. Do not damage the refrigerant
circuit.
Do not use mechanical devices or other means
to accelerate the defrosting process.
Do not use electrical appliances inside the food
storage compartments of the case.
All installation and operating instructions
concerning the handling, moving, and use of
these merchandisers must be carefully followed
to avoid either damaging the refrigerant tubing,
or increasing the risk of a leak.

P/N 3104942_B 1-1
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM-A Merchandisers
UL LISTING
These merchandisers are manufactured to meet
ANSI/ UL 471 standard requirements for safety.
Proper installation is required to maintain the
listing.
FEDERAL / STATE REGULATION
These merchandisers at the time they are man-
ufactured, meet all federal and state/ provincial
regulations. Proper installation is required to
ensure these standards are maintained. Near
the serial plate, each merchandiser carries a
label identifying the environment for which the
merchandiser was designed for use.
ANSI/NSF-7 Type I – Display Refrigerator /
Freezer
Intended for 75°F (24°C) / 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
HUSSMANN PRODUCT CONTROL
The serial number and shipping date of all
equipment is recorded in Hussmann’s files
for warranty and replacement part purposes.
All correspondence pertaining to warranty or
parts ordering must include the serial number
of each piece of equipment involved. This is to
ensure the customer is provided with the cor-
rect parts.
SHIPPING DAMAGE
All equipment should be thoroughly examined
for shipping damage before and during
unloading. This equipment has been carefully
inspected at our factory. Any claim for loss
or damage must be made to the carrier. The
carrier will provide any necessary inspection
reports and/or claim forms.
Apparent Loss or Damage
If there is an obvious loss or damage, it must
be noted on the freight bill or express receipt
and signed by the carrier’s agent; otherwise,
carrier may refuse claim.
Concealed Loss or Damage
When loss or damage is not apparent until
after equipment is uncrated, retain all packing
materials and submit a written response to the
carrier for inspection within 15 days.
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 merchandisers 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 cur-
rents around the merchandiser.
INSTALLATION
Recommended operating ambient
temperature is between
65°F (18°C) to 75°F (23.9°C).
Maximum relative humidity is 55%.

1-2 INSTALLATION
P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
SELF CONTAINED LOCATION
Product should always be maintained at proper
temperature. This means that from the time
the product is received, through storage, prepa-
ration and display, the temperature of the
product must be controlled to maximize the
life of the product.
Self contained models have vented base panels
to allow air circulation through the condensing
unit.
See illustrations for clearances distances from
walls, merchandisers, and any other large
objects near the merchandiser’s vented base
panels. Blocking or restricting air flow will
adversely affect performance and may damage
the refrigeration system.
These models need clearance a minimum of 1
inch on each side and at the back of the unit.
This warning does not mean that Hussmann products
will cause cancer or reproductive harm, or is in
violation of any product-safety standards or
requirements. As clarified by the California State
government, Proposition 65 can be considered more of
a‘right to know’ law than a pure product safetylaw.
When used as designed, Hussmann believes that our
products are notharmful. We provide the Proposition
65 warning to stay in compliance with California State
law. It is your responsibility to provide accurate
Proposition 65 warning labels to your customers when
necessary. For more information on Proposition 65,
please visit the California State government website.
August 31, 2018
SHM3-A & SHM4-A

P/N 3104942_B 1-3
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM-A Merchandisers
MODEL DESCRIPTION
SHM-A merchandisers offer versatility for the
display of food items such as: fresh fruit,
vegetables, cheeses and other delicatessen
items. Carefully read and follow the instruc-
tions prior to operating the merchandiser.
UNLOADING
Unloading from Trailer:
Lever Bar (also known as a Mule, Johnson
Bar, J-bar, Lever Dolly, or Pry Lever)
Move the merchandiser as close as possible to
its permanent location and remove all packaging.
Check for damage before discarding packaging.
Remove all separately packed accessories such
as kits and shelves.
Improper handling may cause damage to the
merchandiser when unloading. To avoid damage:
1. Do not drag the merchandiser out of the
trailer. Use a Johnson bar (mule).
2. Use a forklift or dolly to remove the
merchandiser from the trailer.
EXTERIOR LOADING
Do NOT walk on top of merchandisers or
damage to the merchandisers and serious
personal injury could occur. Do not stand
inside of merchandiser
SHIPPING SKID
Each merchandiser is shipped on a skid to
protect the merchandiser’s base, and to make
positioning the case easier.
Do not remove the shipping skid until the
merchandiser is near its final location. The
skid provides protection for both the merchan-
diser and the floor.
Remove the skid by raising one end of the
merchandiser approximately 6 inches. Block the
merchandiser securely, and remove the two skid
bolts from the raised end. Replace the bolts
with (provided) leg levelers. Repeat this proce-
dure at opposing end. Once the leg levelers are
secured in place, the merchandiser may be slid
off the skid and placed in its final location.
DO NOT TILT MERCHANDISER ON ITS
SIDE OR END WHEN REMOVING SKID.
Once the skid is removed, the merchandiser
must be lifted —NOT PUSHED— to reposition.
Check floor where merchandisers are to be set
to see if it is a level area. Determine the highest
part of the floor.
Do NOT remove shipping crate until the
merchandiser is positioned for installation.
Do NOT stand or walk on top of
merchandiser. Do not store items or
ammable materials atop the unit.

1-4 INSTALLATION
P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
MERCHANDISER LEVELING
Besure to position merchandisers proper-
ly. Level the merchandiser by all four corners.
Merchandiser(s) must be installed level to
ensure proper operation of the refrigeration
system, and to ensure proper drainage of
defrost water. Optional leg levelers can be
provided for this purpose.
OPTIONAL LEGS
NSF® approved legs replace the leg levelers if
required by local health codes. The legs raise
the case 6 inches for cleaning purposes. An
optional skirt kit can be provided to snap on
the legs.
SERIAL PLATE LOCATION
The serial plate is located on the interior left
wall of the merchandiser. It contains all perti-
nent information such as model, serial number,
amperage rating, refrigerant type and charge.
This information will be needed to install, service
or order parts for the merchandiser.
REFRIGERATION UNIT ACCESS
The lower access panel may be removed by
lifting the panel straight upward and over the
screws on which it is hanging. The panel is
installed by reversing the above procedure.
Ensure lower access panel is flat against the
floor when installed to prevent air circulation
problems on self contained merchandisers.
Display is mounted on left
side of access panel. Be
careful not to detach cable
from display when removing
access panel.
SEALING MERCHANDISER TO FLOOR
If required by local sanitary codes, or if the
customer desires, merchandisers may be sealed
to the floor using a vinyl cove base trim. The
size needed will depend on how much varia-
tion there is in the floor, from one end of the
merchandiser to the other. Sealing of the lower
front and rear panels on self contained mod-
els may hamper their removal for servicing or
maintenance of the condensing unit.
NOTE: Do not allow trim to cover any intake
or discharge grilles located in the lower front
panel.
Serial Plate
Display
Lift up and
out to remove
access panel

P/N 3104942_B 1-5
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A. SHM-A Merchandisers
Hussmann Self-Contained Refrigeration Equipment Start Up Check List
***Please note that failure to follow this start-up document may void your factory warranty***
Form HSCW01 Rev. 30MAY12 P/N 0525209_B
Step Startup Activity Check
1 Locate, read and maintain install/operation manual in a safe place for
future reference.
2 Examine unit. Confirm there is NO damage or concealed damage.
3 Level the unit, side to side and front to rear.
4 Remove all shipping brackets/compressor straps/bolts etc.
5 Unit must be run on a dedicated electrical circuit without the use of
an extension cord.
6 Ensure that the proper electrical requirements for the equipment are
supplied.
7 Verify field electrical connections are tight.
8 Verify all electrical wiring is secured and clear of any sharp edges or
hot lines.
9 Verify the condensate drain line is properly trapped and pitched.
10 Verify all required clearances on the sides and back of unit.
11 Verify there are no air disturbances external to the unit. Heat and air
registers, fans, and doors etc.
Advise owner/operator that merchandiser must operate at temperature for 24 hrs prior to loading
with product.
LEGAL DISCLAIMER:
Hussmann shall not be liable for any repair or replacements made without the written consent of Hussmann, or when the product is installed or operated in a manner
contrary to the printed instructions covering installation and service which accompanied such product.

1-6 INSTALLATION
P/N 3104942_B U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
NOTES: