Hussmann MD-14 Installation Manual

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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_F

April 2015

Spanish 0531297

French 0531298

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P/N 2402646_F 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

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P/N 2402646_F 1-1

INSTALLATION

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

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.

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%.

Recommended operating ambient

temperature is between

65°F (18°C) to 75°F (23.9°C).

Maximum relative humidity is 55%.

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.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

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.

MD Open Vertical Merchandisers

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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 claried 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_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

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P/N 2402646_F 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.

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.

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.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

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.

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

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1-4 InstallatIon

MERCHANDISER LEVELING

Be sure to position merchandisers

properly. 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.

Safe-NET III Display

Lift up and out to remove access panel

Be careful not to detach Safe-NET III cable from display when removing

Safe-NET III

(Rear)

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 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_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 9

TABLE OF CONTENTS v

ANSI DEFINITIONS ................. vi

INSTALLATION

Certification ........................ 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

Casters ............................ 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 ....................... 2-2

Water Outlet and Water Seal .......... 2-2

START UP / OPERATION

Sequence of Operation ............... 3-7

Controls and Adjustments ............ 3-8

Load Limits ........................ 3-9

Shelves ............................ 3-9

Load Limits ........................ 3-9

Stocking ........................... 3-9

Thermometer ...................... 3-10

Lighting .......................... 3-10

Night Cover ....................... 3-10

MAINTENANCE

Care and Cleaning ................... 4-1

Do NOT Use: ...................... 4-1

Do: ............................... 4-1

Removing Scratches from Bumper ...... 4-2

Cleaning Under Fan Plenum .......... 4-2

Cleaning Stainless Steel Surfaces ....... 4-2

Cleaning Discharge Honeycomb ....... 4-3

Cleaning Coils ...................... 4-3

Cleaning Evaporation Pan ............ 4-4

SERVICE

Replacing Fan Motors and Blades ...... 5-1

Replacing Electronic Ballasts .......... 5-2

Replacing Fluorescent Lamps ......... 5-2

Safe-NET III™ ..................... 3-1

Display ............................ 3-2

Startup ............................ 3-2

Sequence of Operation ............... 3-3

Alarms and Codes ................... 3-4

Defrost Termination Switch ........... 3-4

Temperature Adjustment ............. 3-5

Coil Sensor and Discharge Air ......... 3-6

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

APPENDIX

Part Numbers ...................... A-1

Plan View ......................... A-2

Cross Section and Refrigeration Data ... A-3

Electrical Data ..................... A-4

MD-10 Wiring Diagram ............. A-5

MD-14 Wiring Diagram ............. A-6

WARRANTY

MD Open Vertical Merchandisers

Page 10

REVISION HISTORY

REVISION D — FEBRUARY 2011

1. Updated refrigerant charge amounts, Page A-3

2. Updated display area, Page A-4

3. Changed honeycomb part numbers, Page A-1

REVISION C — DECEMBER 2011

1. Added Safe-NET III™, page 3-1 to 3-6

2. Revised to temperature termination, page 3-7

3. Added optional LED fixtures service, page 5-2

4. Revised wiring diagrams, page A-5 & A-6

REVISION B — DECEMBER 2010

1. Added self contained location drawings, page 1-2

2. Added Remote Line Sizing, Koolgas, page 2-2

3. Added Electronic Control, Section 3

4. Added Technical Data, Appendix A

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_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

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P/N 2402646_E 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

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

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2-2 InstallatIon

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_E U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

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P/N 2402646_F 3-1

START UP / OPERATION MD-10 & MD-14

The Safe-NET III controller includes the

...ATTENTION

INSTALLER

It is the contractor’s responsibility to

install merchandiser(s) in accordance with

all local building and health codes.

Safe-NET III™

TEMPERATURE AND DEFROST

CONTROLLER

SAFE-NET III™ USER INSTRUCTIONS

Your refrigerated case uses a Hussmann Safe-NET™ III temperature and defrost controller to precisely maintain the temperature and prevent frost buildup on the cooling coil. LEDs indicate when the compressor or refrigeration is on, when the case is in a defrost cycle, if the temperature is outside the desired range, or if there is a sensor failure.

An adjustment knob allows the temperature to be set within the configured range and can power off the controller and compressor. Your controller has been custom-configured to provide the best temperature and defrost control for your chilled or frozen food.

following features and connections.

• Adjustment knob: Adjusts the temperature setpoint. Turn adjustment knob to OFF to turn off refrigeration system. Unplug merchandiser from power before servicing the unit.

• Controller LEDs:

Compressor Powered On LED (green): Lights while the compressor is running or the refrigeration valve is open. Defrost Cycle LED (yellow): Lights while the refrigeration coil is defrosting. Temperature or Sensor Alarm (red): Lights if the temperature is too warm or too cold. Flashes if a sensor fails.

The front of the controller has an adjustment knob and status LEDs. The back of the controller has connections for sensors and switched equipment.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

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3-2 Start up / OperatiOn

• Rear connections: – Case temperature sensor:

• Typically senses the temperature of the air in the case. Used by the controller to determine when to power on or power off the compressor or refrigeration.

– Evaporator temperature sensor:

• Senses the temperature of the refrigeration coil. Terminates a defrost cycle when refrigeration coil ice melts.

– Compressor or refrigeration relay:

• Switches on the compressor or refrigeration valve for cooling.

The optional evaporator fan remains ON when

the adjustment knob is in the OFF position.

DISPLAY

The display includes three red LEDs and two digits for temperature, defrost status, and error codes.

The three display LEDs are red, and their behavior matches the LEDs on the controller.

START-UP

1. Plug in the merchandiser.

The OFF Position does not disconnect line

voltage to the case, refrigeration unit, fan, or heater.

2. NOTE: The 65°C Version Controller includes a Parameter Code Number. This number indicates what program has been loaded into the controller. When the Controller is first powered up or is turned off and then back on a 2 digit Parameter Code Number will display for 3 seconds. Then the Self Check will Start. Wait for the self check to complete. During the self check, each LED flashes for one second, then all LEDs turn on for two seconds. If the LEDs do not flash, make sure the adjustment knob is not in the Off position.

• After the self check, all LEDs turn off until the compressor starts. There may be a delay before the compressor starts. If the red Temperature or Sensor Alarm LED stays on after the self check.

• The green Compressor Powered On LED turns on when the compressor starts.

Compressor Powered On

NOTE: Do NOT load product until AFTER merchandiser operates for 24 hours and reaches

Defrost Cycle

Temperature or

Sensor Alarm

desired operating temperature.

Parameter Code is 55.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 15

P/N 2402646_F 3-3

1. NOTE: The 65°C Version Controller includes a Parameter Code Number. This number indicates what program has been loaded into the controller. When the Controller is first powered up or is turned off and then back on a 2 digit Parameter Code Number will display for 3 seconds. Then the Self Check will Start.

Apply power to the merchandiser. Wait for

the self check to complete. During the self check, each LED flashes for one second and then all LEDs turn on for two seconds. If the LEDs do not flash, make sure the adjustment knob is not in the “OFF” position.

1A. The merchandiser temperature displays at

startup. The initial defrost starts two hours later. The display will show the temperature at the start of defrost. This reading will remain

displayed during defrost and until it times out, even though the refrigeration mode has been initiated. (The green LED will be lit.)

2. The compressor will start after a 30 second delay once power is applied.

3. The compressor will continue to run until it reaches its cut-out temperature (Pulldown).

4. The refrigeration cycle will continue for the next subsequent scheduled (1-hour) or demand defrost.

5. The above process will repeat (steps 3 and 4) until the power is interrupted.

6. If power stops, the process will start over at step 1, and the time to subsequent defrost will reset.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

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3-4 Start up / OperatiOn

ALARMS AND CODES

Flashing TemperaTure or sensor alarm leD, e1 or e2

If the Temperature or Sensor Alarm LED (red) on the controller and display is flashing, a temperature sensor has failed. The display shows E1 if the case sensor has failed or E2 if the evaporator sensor has failed.

If the merchandiser sensor fails, refrigeration will run continuously. Turn off, or repeat a duty cycle of a few minutes on and a few minutes off.

DEFROST TERMINATION SWITCH

Merchandisers may use a defrost termination switch, instead of an evaporator sensor to terminate a defrost cycle. The defrost termination switch is temperature activated and senses the completion of defrost.

MANUAL DEFROST

Note:

This procedure initiates a manual or forced defrost.

IMPORTANT: Return the control knob to its original setting (Step1) once the manual defrost has been initiated.

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 17

P/N 2402646_F 3-5

TEMPERATURE ADJUSTMENT

1. Rotate the adjustment knob counter clock-

wise for a warmer setpoint or clockwise for a colder setpoint.

2. While adjusting the temperature, the display shows the setpoint (cut out value). A few seconds after the temperature is set, the controller reverts to the sensed temperature in the merchandiser.

3. To verify merchandiser settings, turn the dial to warm and cold as shown above. Output readings should be within one degree of the temperatures shown above.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

Page 18

3-6 Start up / OperatiOn

MD-10

Yellow Evaporator Sensor Defrost Termination Sensor Location

Black Control Air Sensor

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

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P/N 2402646_F 3-7

MD-14

ISOMETRIC

Yellow Evaporator Sensor Defrost Termination Sensor Location

9.437

DETAIL B

18.000

DETAIL C

SECTION A-A

DETAIL D

SECTION B-B

0522934 B

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

Page 20

3-8 Start up / OperatiOn

1. The Safe-NET III Controller controls refrigeration temperature. This is factory installed in the control panel mounted on the merchandiser’s fascia. Measure discharge air temperatures at the center of the louvers.

...ATTENTION

INSTALLER

It is the contractor’s responsibility to

install merchandiser(s) in accordance with

all local building and health codes.

Defrosts are time initiated and temperature terminated for self contained models. The defrost setting is factory set as shown above.

— 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.

Rear of Safe-NET III

Control

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 21

P/N 2402646_F 3-9

SHELVES

MD models are equipped with four shelves. Heights are adjustable in one-inch increments. Product shelves should be loaded so that the product does not extend over the front edge of the shelf. Product loaded over the edge will interfere with air circulation in the cabinet. It is also desirable to leave a small space between the rear interior wall and the product on the shelves, to allow air to enter the cabinet interior through the perforations in the rear wall. The shelves are rated for 130 pounds each load

capacity.

Install the shelf support brackets first to the desired height before installing each shelf. Place the rear of the bracket in the desired slot. Raise the front of the brackets towards the rear of the cabinet. Once the ends are in the slot, rotate the bracket forward, locking it in place. Place the shelf on the bracket. The

shelves are not to be slanted. They must remain in the horizontal position.

STOCKING

Product should NOT be placed inside the merchandisers until merchandisers are at proper operating temperature.

Allow merchandiser 24 hours to operate before loading product.

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.

Air 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 non-approved shelving, baskets, display racks, or any accessory that could hamper air curtain performance.

LOAD LIMITS

Each merchandiser has a load limit decal. Shelf life of perishables will be short if load limit is violated.

LOAD LIMIT

At no time should merchAndisers be

stocked beyond the loAd limits indicAted.

do not block dischArge Air

louvers.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

Page 22

3-10 Start up / OperatiOn

THERMOMETER

The thermometer is located next to the discharge in the middle of the merchandiser. The reading is in Cº / Fº.

LIGHTING

Interior lighting is provided by a cool, white fluorescent bulb. The bulb is sleeved to maintain proper heat around the bulb for maximum light intensity and to protect the product in case of breakage. The bulb can be replaced without removing shelves or product. To replace the bulb, twist the bulb and slide the prongs clear of the lamp holder. Remove the protective shield from the old bulb, and put it on the new bulb. Make sure the prongs on the bulb twist and lock into place when placing the bulb back in the holders.

NIGHT COVER

All MD models come equipped with a night cover as a standard feature. The handle for the cover is located near the lamp, grasp the handle and pull downward until enough of the cover has been exposed, allowing the handle to be placed over the retainer located on the lower panel. If a night cover must be replaced, follow these steps: disconnect power to the cabinet. On the top exterior of the cabinet, there is a perforated metal cover. Lower the lamp fixture as if you were replacing the ballast. Lift the left retainer. Pull the night cover towards you, and slide to left. Install the new cover in reverse order.

Optional LED lighting is offered for MD merchandisers. LEDs are held in place with clips. The protective light shield is a single piece.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

Fluorescent lamps contain mercury vapor. Mercury exposure at high levels can harm the brain, heart, kidneys, lungs, and immune system of people of all ages. Do not break or puncture fluorescent lamps. Dispose of, or store, all fluorescent lamps in accordance with Federal (40 CFR 273), State, and local hazardous waste requirements. Refer to http://www.epa.gov/mercury/about.htm

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 23

P/N 2402646_F 4-1

MAINTENANCE

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.

Exterior Surfaces

The exterior surfaces must be cleaned with a mild detergent and warm water to protect and maintain their attractive finish.

abrasive cleaNsers or scouriNg pads.

Never use

Interior Surfaces

The interior surfaces may be cleaned with most domestic detergents, ammonia based cleaners and sanitizing solutions with no harm to the surface. Self contained models empty into a limited capacity evaporation pan, which will overflow if excess water is used in cleaning.

Do:

•Remove the product and all loose debris to avoid clogging the waste outlet.

•Store product in a refrigerated area such as a cooler. Remove only as much product as can be taken to the cooler in a timely manner.

•Disconnect electrical power before cleaning.

•Thoroughly clean all surfaces with soap and hot water.

pressure hoses to wash the iNterior.

These will desTroy The merchandisers’

sealing causing leaks and poor performance.

•Take care to minimize direct contact between fan motors and cleaning or rinse water.

•Do NOT flood merchandiser with water.

Never iNtroduce water faster thaN the

waste outlet caN remove it.

do Not use steam or high water

Do NOT Use:

•Abrasive cleansers and scouring pads, as these will mar the finish.

•Coarse paper towels on coated glass.

•Ammonia-based cleaners on acrylic parts.

•Solvent, oil or acidic based cleaners on any interior surfaces.

•Do not use high pressure water hoses.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

Do NOT allow cleaning agent or

cloth to contact food product.

self coNtaiNed models empty iNto a coNdeNsate evaporatioN paN that will overflow if too much water is iNtroduced duriNg cleaNiNg.

•Allow merchandisers to dry before resuming operation.

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

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

Page 24

4-2 Maintenance

Do NOT use HOT water on Cold glass Surfaces.

This can cause the glass to shatter and could

result in personal injury. Allow glass fronts, to

warm before applying hot water.

CLEANING UNDER 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.

CLEANING STAINLESS STEEL SURFACES

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.

SHUT FANS OFF DURING

CLEANING PROCESS.

DO NOT FLOOD!

Use only enough water necessary to clean

surface. Water must not drip down the case!

Never use ammonia based cleansers, abrasive

cleansers, or scouring pads.

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

Page 25

P/N 2402646_F 4-3

CLEANING COILS

Condenser coils should be cleaned at least once per month. Additional cleaning may be needed depending on the operational environment. A dirty condenser blocks normal airflow through the coils.

Airflow blockage increases energy consumption and reduces the merchandiser’s ability to maintain operating temperature.

To clean the coils, use a vacuum cleaner with a wand attachment and a soft (non-metallic) brush to remove dirt and debris. Do not bend coil fins. Always wear gloves and protective eye wear when cleaning near sharp coil fins and dust particles.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

Page 26

4-4 Maintenance

CLEANING EVAPORATION PAN

(SELF CONTAINED ONLY)

The condensate water outlet for self contained models empties into a limited capacity evaporation pan.

Debris or dirt accumulation inside the condensate evaporation pan or on the heater coil will reduce the pan’s evaporation capacity and cause premature heater failure. The evaporation pan waste water will overflow and spill onto the floor if the heater is not properly operating.

Remove accumulated debris from the evaporation pan. Wipe down heater coil with a cloth and warm water. Be sure to remove any dirt, debris or liquids from the heater coil.

Evaporation Pan is Hot!

and poses risk of bodily injury – Always Wear gloves and protective eye wear when servicing. Turn off evaporation pan heater, and allow pan to cool.

Water introduced during cleaning will cause the evaporation pan to overflow.

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.

2. Clean area.

3. Apply vinyl or car wax and polish surface for a smooth glossy finish.

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 1-800-890-2900 • www.hussmann.com

Page 27

P/N 2402646_F 5-1

SERVICE

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 reinstalled correctly.

The blades musT be insTalled wiTh

raised embossing (parT number on plasTic blades) posiTioned as indicaTed on The parTs lisT.

For access to these fans:

1. Remove product and place in a refrigerated area. Turn off power to the merchandiser.

2. Remove bottom display pans.

3. Disconnect fan from wiring harness.

11. Close air gaps under fan plenum. Warmer air moving into refrigerated air reduces effective cooling. If the plenum does not rest against the case bottom without gaps, apply foam tape to the bottom of the fan plenum to reduce improper air movement. Use silicone sealant to close other gaps.

— LOCK OUT / TAG OUT —

4. Remove fan blade.

5. Lift fan plenum and remove screws holding bottom of motor to fan basket.

6. Replace fan motor and blade.

7. Lower fan plenum.

8. Reconnect fan to wiring harness.

9. Turn on power.

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

12. Reinstall display pans. Bring merchandiser to operating temperature before restocking.

Product will be degraded and may spoil if

allowed to sit in a non-refrigerated area.

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

Note: Plenum length and number of fans will vary with model.

MD Open Vertical Merchandisers

Page 28

5-2 Service

REPLACING ELECTRONIC BALLASTS / LED POWER SUPPLIES

MD Merchandisers may be equipped with fluorescent or LED lights. Fluorescent lights are powered by electronic ballasts. LED lights are powered by power supplies. The procedure to replace these parts is similar.

Canopy Ballast or Power Supply

The canopy ballast or power supply is located in the electrical box on top of the MD case.

To gain access:

1. disconnecT The elecTrical power To The

merchandiser.

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

3. Service or replace ballast/power supply as required. Reassemble items as they were originally installed.

4. Reconnect the electrical power.

REPLACING FLUORESCENT LAMPS

Fluorescent lamps have a plastic shield. When the lamp is replaced, keep the lamp shield to install over the new lamp.

The switch under the display lamp cover operates the display lamp.

REPLACING LED FIXTURES

The switch under the display lamp cover operates the display lamp. For LEDs, this protective shield is incorporated as part of the LED fixture. Rotate the LED fixture to release it from the lamp harness.

Fluorescent lamps contain mercury vapor.

Remove Plastic Pins Attaching Display Lamp

Mercury exposure at high levels can harm the brain, heart, kidneys, lungs, and immune system of people of all ages. Do not break or puncture fluorescent lamps. Dispose of, or store, all fluorescent lamps in accordance with Federal (40 CFR 273), State, and local hazardous waste requirements. Refer to http://www.epa.gov/mercury/about.htm

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 29

Appendix A — TechnicAl dATA A-1

DOE 2012

Energy Efficiency

Compliant

Models

Standard Parts

Descripon Part Number

LH End (Beige) less glass 130721 X X

RH End (Beige) less glass 130722 X X

LH End (Black) less glass 0530442 X X

RH End (Black) less glass 0530443 X X

Plexi glass end insert 1006104 X X

Clip end glass (Beige) 0522940 X X

Clip end glass (Black) 0530681 X X

Front Bumper (RED) 37.75” 1006227 X

Front Bumper (RED) 51.5” 1006223

Evaporator Fan Motor (Motor 12W,basket,less blade) 0461804000 X

Evaporator Fan Motor (Motor 5W,basket& blade) 0505079

Evaporator Fan Blade 0142780002 X

Evap Fan Harness 0523592 X

Evap Fan Harness 1804163

Air Sensor (Black) 4000MM 0510533 X X

Defrost Sensor (Yellow) 4000MM 0510532 X X

Safe-Net III Controller 65C 0524123 X X

Safe-Net III Display (F°) 65C 1H59052001 X X

Safe-Net III Display Interface Cable 0509783 X X

Safe-Net III Control Harness (1M) 0513058 X X

Condensate pan heater relay SPDT NC 208V 0342599002 X X

Compressor Relay (T92P7A22-240) 1804241 X X

Power Switch 03S422 X X

Thermometer (horizontal) 1700559000 X X

Front Plexiglass 0520750 X

Front Plexiglass 0520751

Night Curtain 35S0841 X

Night Curtain 35S0842

Honeycomb 0520740 X

Honeycomb 0520500

Power Cord NEMA 6-15P 0508528

Flourscent light (Canopy) F18T8 06S149 X

Flourscent light (Canopy) F032/841 32W 1803337

Ballast 06S187 X X

Lamp Holder 06S188 X X

Safety Sleeve 06S07417 X

Safety Sleeve 06S07414

Light Switch 1801241000 X X

LED Light 3’ 0515963 X

LED light 4’ 0515965

LED Power Supply 0518898 X X

LED lamp Holders 1803376 X X

Light Clips (LED) 0518906 X X

Hussmann refrigerated merchandisers configured for sale for use in the United States meet or surpass the requirements of the DOE 2012 energy efficiency standards.

MD-10UL MD-14UL

X X

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

Page 30

Appendix A — TechnicAl dATA A-2

Models

Refrigeraon

Condensing Unit Assy (134a) Complete w/ condensate pan 0521330 X

Compressor (NJ6226Z) 208/230/60 2000555 X X

Condensing Unit Assy (134a) Complete w/ condensate pan 0521156

Condenser Coil E108812001 X

Condenser Coil E108814001

Drier (C052-S) 1700481000 X X

Condenser Fan Motor 21S071 X

Condenser Fan Blade 0500354 X X

Condenser Fan Motor 0521460

Assembly Evaporator Coil (Complete) 130421000 X

Assembly Evaporator Coil (Complete) 130422000

Evaporator coil E108813001 X

Evaporator coil E108815001

Models

Condensate Pan

Electric Condensate Pan Assy (w/heater & oat switch) 1H11037001 X X

Condensate Pan Heater (750w) 1H07734 X X

Float Switch 1804342 X X

MD-10UL MD-14UL

Models

Sheel Metal Replacement Parts Painted

Front Access Panel 0539989 X

Front Access Panel 0539990

LH End Panel -Base 0539537 X X

RH End Panel -Base 0539538 X X

Rear Base Panel- not to be painted 0210158 X

Rear Base Panel- not to be painted 0210159

Shelf Assembly (includes shelf,brackets and PTM) 130761 X

Shelf Assembly (includes shelf,brackets and PTM) 130762

Shelf Bracket 13062 X X

Shelf 130451 X

Shelf 130452

PTM 30S8151 X

PTM 30S8152

Boom Back Shelf 130221 X

Boom Back Shelf 130222

Boom Front Shelf 0210214 X

Boom Front Shelf 0210215

All these part numbers are painted assemblies

MD-10UL MD-14UL

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 31

A-3 Appendix A — TechnicAl dATA

MD — Plan View

Dimensions shown as inches and (mm).

8 3/8

(213)

4 1/4

(108)

REFRIGERATION OUTLET

ELECTRICAL OUTLET

17 1/8

(435)

7 3/4

(197)

4 (102) 3 7/8 (98)

DRAIN

Front of Merchandiser

Model Length MD-10 39" MD-14 52"

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 32

Appendix A — TechnicAl dATA A-4

MD — Cross Section

REFRIGERATION DATA

Note: This data is based on store temperature

and humidity that does not exceed 75°F and 55% R.H. unless otherwise stated. Schedule defrost at night while lights are off.

Thermostat Setting CI/CO (°F)

40 / 33 34 / 23

Condensing Unit (hp) MD-10 1 MD-14 1

Condensing Unit Capacity

MD-10 7376 MD-14 7376

Position 1 Position 2

(Btu/hr at std. rating conditions)

DEFROST DATA

Frequency (hr)

Offtime

Failsafe (minutes) 10

Defrost Termination 50°F Temperature

Refrigerant Charge

MD-10 (R134a) 22.928 oz 0.65 kg MD-14 (R134a) 36.261 oz 1.028 kg

PHYSICAL DATA

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

Page 33

A-5 Appendix A — TechnicAl dATA

Electrical Data

Note: These are rated values for individual components and should not be added together to determine total merchandiser electrical load.

MD-14 MD-10

Number of Fans – 5W 2 1

Amperes Watts Amperes Watts Evaporator Fans

208-230V 60Hz Standard 0.6 10 0.7 12

Condensate Pan Heaters (230V) 3.6 750 3.6 750

Condensing Unit (208/230V, 1Ph, 60Hz) Standard

MD-10 MD-14

Compressor LRA 41 41 Compressor RLA 9.5 9.5

Product Data

MD-10

AHRI Total Display Area

(Sq Ft/Case) 11.7 ft

/case ( 3.57 m

MD-14

AHRI Total Display Area

(Sq Ft/Case) 15.79 ft

/case ( 4.81 m

1 Computed using AHRI 1200 standard methodology: Total Display Area, ft2 [m2] / Unit of Length, ft [m]

/case)

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 34

Appendix A — Wiring diAgrAm A-6

MD-10

HEATER

PHASE

ELECTRIC BOX

THERMOSTAT

SENSOR

AIR TEMP

BLACK SHEATH

SAFENET III CONTROL

FAN

PHASE

COMP NA

THERMOSTAT SENSOR TEMP

DEFROST

YELLOW SHEATH

SERIAL

LINE 1

LINE 2

8 9

2 M

HACCP

LINK

PROG

KEY

DISPLAY

COMPRESOR

CONDENSER

FAN

RELAY

1 0

648 2

EVAPORATOR

FAN

LAMP

0521458_D

LEVEL

SWITCH

RELAY

T STAT LIMIT

CONDENSER

HEATER

S3 S1

MAIN

SWITCH

S2S4

BALLAST

NEMA 6-15 P

230 V 60HZ 1HP

HUSSMANN CORPORATION • BRIDGETON, MO 63044-2483 U.S.A.

MD Open Vertical Merchandisers

Page 35

A-7 Appendix A — Wiring diAgrAm

MD-14

HEATER

PHASE

ELECTRIC BOX

THERMOSTAT

SENSOR

AIR TEMP

BLACK SHEATH

SAFENET III CONTROL

FAN

PHASE

COMP NA

THERMOSTAT

SENSOR TEMP

DEFROST

YELLOW SHEATH

SERIAL

LINE 1

LINE 2

8 9

2 M

HACCP

LINK

PROG

KEY

DISPLAY

COMPRESOR

CONDENSER

FAN

RELAY

1 0

648

EVAPORATOR FAN

SWITCH

LAMP

BALLAST

LEVEL

SWITCH

RELAY

T STAT

CONDENSER

LIMIT

0521459_D

HEATER

S3 S1

MAIN

SWITCH

S2S4

NEMA 6-15 P

230 V 60HZ 1HP

P/N 2402646_F U.S. & Canada 1-800-922-1919 • Mexico 01 800-890-2900 • www.hussmann.com

Page 36

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