Hussmann MD-14, MD-10 Installation & Operation Manual
MD
®
Medium Temperature
Self Contained Open Vertical
Merchandisers
MD-10
IMPORTANT
Keep in store for
future reference!
MANUAL - I/O SELF CONTAINED MD
MD-14
Installation &
Operation Manual
P/N 2402646_H
June 2018
Spanish 0531297
French 0531298
P/N 2402646_H iii
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 pre-chilled products
only.
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 01 800-890-2900
www.hussmann.com
© 2018 Hussmann Corporation
TABLE OF CONTENTS v
ANSI DEFINITIONS ................. vi
INSTALLATION
UL Listing ......................... 1-1
Federal & State Regulation ........... 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
Serial Plate Location ................. 1-4
Refrigeration Unit Access ............. 1-4
Sealing Merchandiser to Floor ......... 1-4
ELECTRICAL / REFRIGERATION
Merchandiser Electrical Data .......... 2-1
Field Wiring ........................ 2-1
Electrical Connections . . . . . . . . . . . . . . . . 2-1
Electrical Outlet ..................... 2-1
Power Switch ....................... 2-1
Refrigeration (Self Contained Models) .. 2-2
Water Outlet and Water Seal .......... 2-2
Stocking .......................... 3-11
Thermometer ...................... 3-12
Lighting .......................... 3-12
Night Cover ....................... 3-12
MAINTENANCE
Care and Cleaning ................... 4-1
Do NOT Use: ...................... 4-1
Do: ............................... 4-1
Cleaning Under Fan Plenum .......... 4-2
Cleaning Stainless Steel Surfaces ....... 4-2
Cleaning Coils ...................... 4-3
Cleaning Evaporation Pan ............ 4-4
Removing Scratches from Bumper ...... 4-4
SERVICE
Replacing Fan Motors and Blades ...... 5-1
Replacing Electronic Ballasts/LED Power
Supplies ........................... 5-2
Replacing Fluorescent Lamps ......... 5-2
Replacing LED Fixture ............... 5-2
START UP / OPERATION MD-10 & MD-14
Controller Operation ................. 3-1
Connections ........................ 3-4
LED .............................. 3-5
KDEPlus Buttons ................... 3-6
Setpoint: Setting and Edit Lock ........ 3-7
Display Probes Value ................. 3-7
Key-Activated Functions .............. 3-7
Typical Sensor to Control Configurations 3-8
Controls and Adjustments ........... 3-10
Shelves ........................... 3-11
Load Limits ....................... 3-11
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
TECHNICAL DATA
Part Numbers ...................... A-1
Plan View - MD ................... A-3
Cross Section ...................... A-4
Refrigeration/Defrost/Physical Data .....A-4
Electrical/Product Data ...............A-5
MD-10 Wiring Diagram ............. A-6
MD-14 Wiring Diagram ............. A-7
WARRANTY
MD Open Vertical Merchandisers
vi
REVISION HISTORY
REVISION H —
1. Page 3-8 & 3-9 Removed marker colors
REVISION G —
1. Page 1-4-Replaced controller display picture
-Replace Safenet display & cable picture
2. Page 3-1 to 3-5-Removed Safenet III information
3. Page 3-6-Change sensor colors Yellow to
Orange and Black to Green
-Replaced Sensors to control connections picture
4. Page 3-7-Changes sensor color Yellow to Orange
-Replaced Sensors to control connections picture
5. Page 3-8-Replaced SafeNet III-Remove selected
picture
6. Page A-1-Removed selected parts from table
and parts
7. Page A-6 & A-7-Replace diagrams with new
revisions attached
ORIGINAL ISSUE — AUGUST 2005
* * * * * * * * * * * * * * * * * * * * * * * * * *
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.
P/N 2402646_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
P/N 2402646_H 1-1
INSTALLATION
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 manufactured, 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. A Type II
fan speed control kit is required for each merchandiser to operate at Type II conditions.
ANSI/NSF-7 Type I – Display Refrigerator /
Freezer
Intended for 75°F (24°C) / 55%RH Ambient Application
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.
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
correct parts.
SHIPPING DAMAGE
All equipment should be thoroughly examined for shipping damage before and during
unloading. This equipment has been carefully
Recommended operating ambient
temperature is between
65°F (18°C) to 75°F (23.9°C).
Maximum relative humidity is 55%.
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 currents around
the merchandiser.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
MD Open Vertical Merchandisers
1-2 InstallatIon
SELF CONTAINED (LOCATION)
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.
Be sure to position self contained
merchandisers properly.
SELF CONTAINED models have vented base
panels to allow air circulation through the
condensing unit.
Allow for a minimum 5 in. clearance from
walls, merchandisers, and any other large
objects near the merchandiser’s vented base
panels (for self contained models). Blocking
or restricting air flow will adversely affect performance and may damage the refrigeration
system.
For California Businesses:
This product may contain chemicals known
to the State of California to cause cancer,
birth defects, or other reproductive harm.
This warning is the result of the California State
law known as the California Safe Drinking Water
and Toxic Enforcement Act of 1986, which is
commonly referred to as “Proposition 65.”
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 claried by the
California State government, Proposition 65
can be considered more of a ‘right to know’ law
than a pure product safety law. When used as
designed, Hussmann believes that our products
are not harmful. 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.
P/N 2402646_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
P/N 2402646_H 1-3
MODEL DESCRIPTION
The MD models are open, vertical, medium
temperature display merchandisers. They are
self contained merchandisers with their own
condensing unit. Each self contained model
has a condensing unit that is factory installed
beneath the display area of the case. The unit
is ready for operation when electrical service is
connected.
Do not store items or ammable materials
atop the unit.
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:
EXTERIOR LOADING
Do NOT walk on top of merchandisers or
damage to the merchandisers and serious
personal injury could occur.
merchandisers are not structurally
designed to support excessive external
loading such as the weight of a person. Do
not place heavy objects on the merchandiser.
SHIPPING SKID
Each merchandiser is shipped on a skid to
protect the merchandiser’s base, and to make
positioning the case easier.
Remove the top of the crate and detach walls
from each other. Lift crate from the skid.
Unscrew the case from the skid. The fixture
can now be lifted off the crate skid. Lift only at
base of skid! Remove any braces and/or skids
attached (blanket wrapped merchandiser may
have skids).
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.
To remove the skid, remove screws attaching
skid to the merchandiser.
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.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Check floor where cases 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.
MD Open Vertical Merchandisers
1-4 InstallatIon
MERCHANDISER LEVELING
Be sure 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.
SERIAL PLATE LOCATION
The serial plate is located at the interior top
left end. It contains all pertinent information
such as model, serial number, amperage rating,
refrigerant type and charge.
Serial Plate
REFRIGERATION UNIT ACCESS
The lower front panel may be removed by
lifting the panel straight upward and over
the tabs on which it is hanging. In a self contained merchandiser, two screws will have to
be removed from either end of the panel. The
panel is installed by reversing the above procedure. Ensure lower front panel is flat against
the floor when installed to prevent air circulation problems on self contained merchandisers.
Lift up and
out to remove
Display
access panel
Be careful not to detach
cable from display when
removing access panel.
Controller (Rear)
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 variation 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 models 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.
P/N 2402646_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
P/N 2402646_H 2-1
ELECTRICAL / REFRIGERATION
MERCHANDISER ELECTRICAL DATA
Refer to merchandiser serial plate for electrical
information.
FIELD WIRING
Field wiring must be sized for component
amperes stamped on the serial plate. Actual
ampere draw may be less than specified.
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.
— LOCK OUT / TAG OUT —
ALWAYS CHECK THE SERIAL PLATE FOR
COMPONENT AMPERES
ELECTRICAL CONNECTIONS
All wiring must be in compliance with NEC
and local codes. Self contained models are
electrical cord connected at the electrical box.
ELECTRICAL OUTLET:
Before the merchandiser is connected to any
wall circuit, use a voltmeter to check that the
outlet is at 100% of the rated voltage. The wall
circuit must be dedicated for the merchandiser.
Failure to do so voids the warranty. Do not use
an extension cord. Never plug in more than one
merchandiser per electrical circuit.
Self-contained models have
factory-installed power cords
attached at the electrical box.
NEMA 6-15P
Receptacle
MD
POWER SWITCH
The main power switch is located in the
electrical box. This switch controls all power
to the case. This switch must be in the OFF
position, and the electrical cord must be
unplugged before starting any cleaning or
service work.
• Always use a dedicated circuit with the
amperage stated on the unit.
• Plug into an outlet designed for the plug.
• Do not overload the circuit
• Do not use long or thin extension cords.
Never use adapters.
• If in doubt, call an electrician.
HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.
Risk of Electric Shock. If cord or plug becomes
damaged, replace only with a cord and plug of
the same type.
Merchandiser must be grounded.
Do not remove the power supply cord ground.
MD Open Vertical Merchandisers
2-2 ElEctrIcal / rEfrIgEratIon
REFRIGERATION
(Self Contained Models)
Each self contained model is equipped
with its own condensing unit and control
panel located beneath the display area. The
correct type of refrigerant will be stamped
on each merchandiser’s serial plate. The
merchandiser refrigeration piping is leak
tested. The unit is charged with refrigerant,
and shipped from the factory with all service
valves open.
Refrigeration lines are under pressure.
Refrigerant must be recovered before
attempting any connection or repair.
WATER OUTLET AND WATER SEAL
The condensate water outlet is located at the
front corners of the evaporator coil area. The
outlet has a factory installed, external water
seal.
For self contained models, this water seal
drains into the condensate evaporator pan
located beneath the merchandiser.
NOTE: All lower base panels must be in place
when the refrigerator is operating. If not,
airflow from the condenser will be directed
over the evaporator pan and defrost water in
the pan may overflow.
When brazing pipes, be sure to use the
insulation blanket shipped with the
merchandiser to prevent damage to the
metal merchandiser bottom.
Product will be degraded and may spoil if
allowed to sit in a non-refrigerated area.
P/N 2402646_H U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com
Loading...