2402646_C MD Installation and Service Manual
Contents
1. SELF CONTAINED MODELS EMPTY INTO A CONDENSATE EVAPORATION PAN THAT WILL OVERFLOW IF TOO MUCH WATER IS INTRODUCED DURING CLEANING eAllow merchandisers to dry before resuming operation eAfter cleaning is completed turn on power to the merchandiser MD Open Vertical Merchandisers 4 2 MAINTENANCE N CAUTION 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 1s properly lowered into position OR PRODUCT LOSS WILL RESULT due to improper refrigeration CAUTION SHUT FANS OFF DURING CLEANING PROCESS P N 2402646 D 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 N CAUTION 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 WARNING2. MD 10 MD 10_ P N 2402646 D U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com APPENDIX A TECHNICAL DATA A 3 MD Cross Section REFRIGERATION DATA 28 1 2 724 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 MD Thermostat Setting CHCO F Position Position 2 40 33 34 23 Condensing Unit hp MD 10 1 MD 14 1 Condensing Unit Capacity MD 10 7376 MD 14 7376 Btu hr at std rat ng conditions 33 5 854 DEFROST DATA Frequency hr 1 OFFTIME Failsafe minutes 10 Defrost Termination 50 F Temperature PHYSICAL DATA Refrigerant Charge MD 10 R134a 33 757 oz 0 957 kg MD 14 R134a 36 261 oz 1 028 kg HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A MD Open Vertical Merchandisers 4 APPENDIX 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 FtlCase 11 7 ft case 3 57 m cas
3. 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 U S amp Canada 1 800 922 1919 e Mexico 1 800 890 2900 e www hussmann com P N 2402646 D 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 main tain 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 e BRIDGETON MO 63044 2483 U S A 4 3 MD Open Vertical Merchandisers 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 ov
4. HUSSMANN LISTED MD Medium Temperature Self Contained Open Vertical Merchandisers Installation amp e Service Manual NN ot 9 P N 2402646 D X February 2012 P N 2402646 D iii ATTENTION 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 F Gc m a n n R 12999 St Charles Rock Road Bridgeton MO 63044 2483 U S amp Canada 1 800 922 1919 Mexico 01 800 890 2900 www hussmann com 2012 Hussmann Corporation TABLE OF CONTENTS ANSI DEFINITIONS INSTALLATION 444 4 sages seta RSU nas Hussmann Product Control Shipping Damage Self Contained Location Model Description Unloading Exterior Loading Shipping Skid Merchandiser Leveling Serial Plate Location Refrigeration Unit Access Casters Sealing Merchandiser to Floor ELECTRICAL REFRIGERATION Merchandiser Electrical Data Field Wiring Electrical Connections Electrical Outlet Power Switch Refrigeration Water Outlet and Water Seal START UP OPERATION Safe NET IIITM Display Startup Sequence of Operation Alarm
5. K amp ER i ee S To obtain warranty information 05 or other support contact your 9 Hussmann representative 6S Please include the model and serial number of the product QU NM _ _ a _ _ E Er amp U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 amp www hussmann com SA amp ee K amp Hussmann Corporation 12999 St Charles Rock Road Bridgeton MO 63044 www hussmann com
6. 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 15 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 CAUTION 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 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 1s located at the interior top left end It contains all pertinent information
7. 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 12 Reinstall display pans Bring merchandiser to operating temperature before restocking Fan Assembly Speed Nut T Fan Blade Airflow Direction Motor Plenum Note Plenum length NM and number of fans will vary with model MD Open Vertical Merchandisers 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 1s 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 origi nally installed 4 Reconnect the electrical power N WARNING 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
8. 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 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 eSolvent oil or acidic based cleaners on any interior surfaces Do not use high pressure water hoses N WARNING Product will be degraded and may spoil if allowed to sit in a non refrigerated area HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Do Remove the product and all loose debris to avoid clogging the waste outlet eStore 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 DO NOT USE STEAM OR HIGH 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 CAUTION Do NOT allow cleaning agent or cloth to contact food product
9. 2 Updated display area Page A 4 3 Changed honeycomb part numbers Page 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 amp 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 Ve oe ve we ve owe ve we RR RR RR RR ER SE 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 1f 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 D U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com P N 2402646 D 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 id
10. These merchandisers are designed for displaying products in air conditioned stores where temperature 1s 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 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 1 2 INSTALLATION SELF CONTAINED LOCATION Product should always be maintained at proper temperature This means that from the time the product 1s 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 affe
11. amp Canada 1 800 922 1919 e Mexico 1 800 890 2900 www hussmann com P N 2402646 D 5 1 SERVICE N WARNING LOCK OUT TAG OUT To avoid serious injury or death from electrical 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 4 Remove fan blade 5 Lift fan plenum and remove screws hold ing 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 1s working and blade 1s turning in the correct direction N WARNING Product will be degraded and may spoil if allowed to sit in a non refrigerated area HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 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 11 Close air gaps under fan plenum Warmer air moving into refrigerated air reduces effective cooling
12. lights fans heaters and thermostats Remove Plastic Pins Attaching Display Lamp P N 2402646 D 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 a Protective Shield Bulb S End Cap 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 N WARNING 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 U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com APPENDIX TECHNICAL DATA DOE 2012 Energy Efficiency Compliant Item Part MO 4410327 MO 4411019 CT 4483188 CC 4482540 EP 4482541 EP 4441283 CC 4482538 CC 4482992 HEATERS DP 4997869 HE 4851189 FL 4916870 RL 4480237 Description FAN ASSEMBLIES AND THERMOSTATS 12W Standard Fan Assembly MD 10 SW Fan Assembly MD 14 Safe NET III Con
13. such as model serial number amperage rating refrigerant type and charge Bussmeann 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 proce dure Ensure lower front panel is flat against the floor when installed to prevent air circulation problems on self contained merchandisers Lower Front Panel Removal a ew Lower Front Bane To Install To Remove Base P N 2402646_D Lift up and out to remove access panel Safe NET III cable from dis play when removing access panel CASTERS The merchandiser may be equipped with optional casters If the case has optional cast ers as shown below use the brake to lock the case in place To Unlock Lock 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 1s 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 t
14. AND WATER SEAL The condensate water outlet 1s 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 lower base panels must be in place when the refrigerator 1s operating If not air flow from the condenser will be directed over the evaporator pan and defrost water in the pan may overflow N WARNING Product will be degraded and may spoil if allowed to sit in a non refrigerated area P N 2402646 D U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com P N 2402646 D START UP OPERATION MD 10 amp MD 14 ATTENTION INSTALLER It is the contractor s responsibility to install merchandiser s in accordance with all local building and health codes Safe NET 17 TEMPERATURE AND DEFROST CONTROLLER SAFE NET HIM USER INSTRUCTIONS Your refrigerated case uses a Hussmann Safe NET III temperature and defrost controller to precisely maintain the tempera ture and prevent frost buildup on the cooling coil LEDs indicate when the compressor or refrigeration 1s on when the case 1s n a defrost cycle if the temperature is outside the desired range or if there 1s a sensor failure An adjustment knob allows the temperature to be set within the configured range and can power off the controller an
15. 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 e Senses the temperature of the refrigeration Terminates a defrost cycle when refrigeration coil ice melts Compressor or refrigeration relay e Switches on the compressor or refrigeration valve for cooling N WARNING 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 Compressor Powered On o Defrost Cycle c n va Temperature or HUSSma nn Sensor Alarm P N 2402646 D START UP 1 Plug in the merchandiser N WARNING The OFF Position does not disconnect line voltage to the case refrigeration unit fan or heater 2 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 1s not n 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 g
16. Minutes Medium Temp 24 F to 32 F Off Time Dairy Deli 1 The Safe NET III Controller controls refrig Defrosts are time initiated and temperature eration temperature This is factory installed In terminated for self contained models The the control panel mounted on the merchandisers defrost setting 1s factory set as shown above fascia Measure discharge air temperatures at N WARNING the center of the louvers LOCK OUT TAG OUT To avoid serious injury or death from electrical It is the contractor s responsibility to shock always disconnect the electrical power install merchandiser s in accordance with at the main disconnect when servicing or all local building and health codes replacing any electrical component This includes but is not limited to such items as doors lights fans heaters and thermostats EX Rear of Safe NET III Control HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A MD Open Vertical Merchandisers 3 8 START UP OPERATION SHELVES MD models are equipped with four shelves Heights are adjustable m 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 1s 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 perfo
17. On the top exterior of the cabinet there is a perfo rated 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 N WARNING Product will be degraded and may spoil if allowed to sit in a non refrigerated area WARNING 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 MD Open Vertical Merchandisers 3 10 START UP OPERATION NOTES P N 2402646 D U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com P N 2402646 D 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 NEVER USE ABRASIVE CLEANSERS OR SCOURING PADS Interior Surfaces
18. ct perfor mance and may damage the refrigeration system a Zero Clearance at Sides Plan View Exhaust M 24 in Clearance at Front 5 in Clearance at Rear P N 2402646 D U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com P N 2402646 D 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 1s factory installed beneath the display area of the case The unit is ready for operation when electrical service 15 connected WARNING Do not walk or put heavy objects on case 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 HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A EXTERIOR LOADING Do NOT walk on top of merchandisers or damage to the merchandisers and serious personal injury could occur
19. d compressor Your controller has been custom configured to pro vide the best temperature and defrost control for your chilled or frozen food The front of the controller has an adjustment knob and status LEDs The back of the controller has connections for sensors and switched equipment Adjustment Knob Compressor Powered On zF green _ Hussmann Defrost Cycle yellow Temperature or Sensor Alarm red Warm Off Position position Cold Position HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A The Safe NET III controller includes the 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 Case Temperature Evaporator Temperature Sensor Sensor and Switch Common _ Defrost Termination Switch optional Interface Box and Copy Card TTL Connector Compressor Heater E72R only Fan E72R only Controller LEDs 3 Compressor Powered On LED green Lights while the compressor 1s running or the refrigeration valve 1s open 34 Defrost Cycle LED yellow Lights while the refrigeration coil 1s defrosting Temperature or Sensor Alarm red Lights if the temperature is too warm or too cold Flashes if a sensor fails MD Open Vertical Merchandisers 3 2 START UP OPERATION Rear connections
20. duct Past Front of Shelves Do Not Allow Product to Block Return Air Grill Do Not Block Merchandiser Air Flow U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com P N 2402646 D THERMOMETER The thermometer 15 located next to the discharge in the middle of the merchandiser The reading is in C F LIGHTING Interior lighting 1s provided by a cool white fluorescent bulb The bulb is sleeved to main tain 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 Optional LED lighting 1s offered for MD merchandisers LEDs are held in place with clips The protective light shield 1s a single piece HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 3 9 NIGHT COVER All MD models come equipped with a night cover as a standard feature The handle for the cover 1s 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
21. e MD 14 AHRI Total Display Area Sq FtCase 15 79 ft case 4 81 nv case Computed using AHRI 1200 standard methodology Total Display Area ft m Unit of Length ft m COMPRESSOR MODEL NUMBER LENGTH DEPTH HEIGHT NOMINAL REFRIG CASE FUSE NEMA APPROX HORSEPOWER TYPE VOLTS AMPS PLUG WEIGHT 5 owe 10 P in sem asim E 77 in ef e H 134a 208 230 60 1 10 3 Amps 6 15P 368 lbs P N 2402646 D U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com APPENDIX WIRING DIAGRAM A 5 WARNING Always unplug the equipment ELECTRICAL SPECS MODEL MD10 from all power sources before nc 00 00 making any repairs FREQUENCY 60 HZ DEFROST DISCHARGE BK COMPRESSOR SENSOR SENSOR n OHSS CONDENSER S mE Tom RELAY LED LAMP EVAPORATOR FAN W POWER SUPPLY OPTIONAL LED WIRING rn BK ff W ve BALLAST W A D FLUORESCENT WIRING h ui N D W LEVEL SWITCH MAIN i L gt SWITCH T STAT RELAY LIMIT BK Um CONDENSATE PAN HEATER R BK ze 208 230V WARNING All components must have mechanical ground and th
22. e merchandiser must be grounded CIRCLED NUMBERS PARTS List Item NUMBERS R Red Y Yellow G Green BL Blue Black W White 120V Power 120V NEUTRAL FIELD GROUND m CASE GROUND HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A MD Open Vertical Merchandisers 6 APPENDIX WIRING DIAGRAM ELECTRICAL SPECS WARNING Always unplug the equipment MODEL MD14 from all power sources before VOLTAGE 208 230 00 00 making any repairs FREQUENCY 60 HZ W DEFROST DISCHARGE BK COMPRESSOR SENSOR _ SENSOR BK CONDENSER FAN BL WS RELAY LED LAMP EVAPORATOR POWER SUPPLY BK N W SWITCH S PN d zd j lt e BK a W SWITCH MAIN SWITCH CONDENSATE PAN HEATER R BK 208 230V WARNING All components must have mechanical ground and the merchandiser must be grounded CIRCLED NUMBERS PARTS List ITEM NUMBERS R Red Y Yellow Green BL Blue BK Black W White 120V Power 120V NEUTRAL FIELD GROUND mm CASE GROUND P N 2402646 D U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com NT
23. entifying 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 Hussmanns files for warranty and replacement part purposes correspondence pertaining to warranty or parts ordering must include the serial number of each piece of equipment involved This 1s to ensure the customer 1s provided with the correct parts SHIPPING DAMAGE 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 e BRIDGETON MO 63044 2483 U S A Apparent Loss or Damage If there 1s 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 15 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
24. epeat a duty cycle of a few minutes on and a few minutes off HUSSmann P N 2402646 D 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 Compressor Compressor Off Time If On Time If Sensor Failed Sensor Failed On Compressor Status Off On Off On Off Time MANUAL DEFROST a 5 Note This procedure initiates a manual or forced defrost o T N N Warm Cold 1 Note location of knob setting no Rotate knob fully counterclockwise until it stops full warm OFF position Warm Cold 3 After 10 seconds but before 20 seconds rotate knob fully clockwise until it stops full cold position IMPORTANT Return the control knob to its original setting Step 1 once the manual defrost has been initiated U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com P N 2402646 D Sate NET Ill a 4 O 9 Safe NET Ill Control OFF Position Set at Full Cold Position Safe NET Ill a 4 3 t 5 HUSSMANN O sk O 9 Safe NET Ill Control 4 1 Position 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 t
25. erflow and spill onto the floor if the heater 1s not properly operating Remove accumulated debris from the evapora tion pan Wipe down heater coil with a cloth and warm water Be sure to remove any dirt debris or liquids from the heater coil 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 D N WARNING 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 PRECAUTION CLEANING PRECAUTIONS When Cleaning e Do not use high pressure water hoses e Do not introduce water faster than waste outlet can drain e NEVER INTRODUCE WATER ON SELF CONTAINED UNIT WITH AN EVAPORATION PAN e NEVER USE A CLEANING OR SANITIZING SOLUTION THAT HAS OIL BASE these will dissolve the butyl sealants or an AMMONIA BASE this will corrode the copper components of the merchandiser e TO PRESERVE THE ATTRACTIVE FINISH e Use a water and a mild detergent for the exterior only Do NOT use a chlorinated cleaner on any surface Do NOT use abrasives or steel wool scouring pads these will mar the finish U S
26. f 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 ht HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 4 Time to Subsequent Defrost 1 Hours or Demand Defrost 52 HUussmann 5 Time to Subsequent Defrost 1 Hours or Demand Defrost Pulldown After Defrost Compressor ON Maximum Defrost Time 10 Minutes Failsafe Defrost Cycle Terminates at GREEN REFRIGERATION YELLOW DEFROST RED ALARM DISPLAY 2 The compressor will start after a 30 second delay once power 1s 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 1s interrupted 6 If power stops the process will start over at step 1 and the time to subsequent defrost will reset MD Open Vertical Merchandisers 3 4 START UP OPERATION ALARMS AND CODES FLASHING TEMPERATURE OR SENSOR ALARM LED 1 or E2 If the Temperature or Sensor Alarm LED red on the controller and display 1s flashing a temperature sensor has failed The display shows 1 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 r
27. he lower front panel U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com P N 2402646 D 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 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 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 f 1n doubt call an electrician HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A WARNING 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 elec
28. he setpoint cut out value A few seconds after the temperature 1s set the controller reverts to the sensed temperature in the merchandiser HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A gt Hussmann 3 5 Display at Full Cold Model MD Display at 1 Position Model MD 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 MD Open Vertical Merchandisers 3 6 START UP OPERATION Typical Sensor to Control Configuration Black Air Yellow Sheath Evaporator Sensor Defrost Termination Black Evap a Black Sheath BE Air Sensor Display fF White ZZ 273 LP B Common for 2222 IS Both Sensors Yellow Sensor Defrost Termination Evaporator Black Sensor Control Air Control Sensor Black Sheath Evaporator Sensor Defrost Term inserted into the Evaporator Fins or into the Suction Line Yellow Sheath 7 Black Air Sensor 8 Black Evaporator Sensor 9 11 Not Used White Common Se Both Sensors 10 A Detail A P N 2402646 D U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com P N 2402646 D 3 7 CONTROLS and ADJUSTMENTS Refrigeration Defrost Controls Controls Product Discharge Air Defrost Type of Termination Failsafe Application Temperature Frequency Defrost Temperature Time per day
29. rations 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 LOAD LIMITS Each merchandiser has a load limit decal Shelf life of perishables will be short 1f load limit 1s violated LOAD LIMIT AT NO TIME SHOULD MERCHANDISERS BE STOCKED BEYOND THE LOAD LIMITS INDICATED DO NOT BLOCK DISCHARGE AIR LOUVERS P N 2402646 D 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 1s 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 Do Not Load Pro
30. reen Compressor Powered On LED turns on when the compressor starts NOTE Do NOT load product until AFTER merchandiser operates for 24 hours and reaches desired operating temperature N WARNING Product will be degraded and may spoil if allowed to sit in a non refrigerated area U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com P N 2402646 D 3 3 SEQUENCE OF OPERATION MD 10 MD 14 Compressor Starts V Initial Defrost Two Hours After Start Up Pull down Compressor On Compressor runs continuously until it reaches its cut out setting Refrigeration Cycle Maximum Defrost Time 10 Minutes Failsafe Defrost cycle is temperature terminated Defrost initiates two hours after start Compressor When powered up there will Starts be a delay of 30 sec at start up before the compressor starts ON A AN Compressor Start Up Off Cycle Safe NET Ill GREEN REFRIGERATION YELLOW DEFROST RED ALARM OFF POSITION Safe Net II Controller 1 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 1s not 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 o
31. s and Codes Defrost Termination Switch Temperature Adjustment Coil Sensor and Discharge Air HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A V Sequence of Operation 3 7 Controls and Adjustments 3 8 Load Limits seins scs epson ur oio geo 3 9 wc M 3 9 Load Limits 3 9 Stocking 3 9 Thermometer 3 10 Lighting 3 10 Night COVER 444644 934 3 10 MAINTENANCE Care and Cleaning 4 Do NOT Use 4 1 DO Ur 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 APPENDIX Part Numbers 1 IME VION oe cong eos ee eae ee HT A 2 Cross Section and Refrigeration Data A 3 Electrical Data sais code n ede hed ee sa ds A 4 MD 10 Wiring Diagram A 5 MD 14 Wiring Diagram A 6 WARRANTY MD Open Vertical Merchandisers vi REVISION HISTORY REVISION D FEBRUARY 2011 1 Updated refrigerant charge amounts Page 3
32. trical component This includes but is not limited to such items as doors lights fans heaters and thermostats Self contained models have factory installed power cords attached at the electrical box NEMA 6 15H Heceptacle MD POWER SWITCH The main power switch 1s 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 N WARNING Risk of Electric Shock If cord or plug becomes damaged replace only with a cord and plug of the same type N WARNING Merchandiser must be grounded Do not remove the power supply cord ground MD Open Vertical Merchandisers 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 1s charged with refrigerant and shipped from the factory with all service valves open N WARNING Refrigeration lines are under pressure Refrigerant must be recovered before attempting any connection or repair N CAUTION When brazing pipes be sure to use the insulation blanket shipped with the merchandiser to prevent damage to the metal merchandiser bottom WATER OUTLET
33. troller Digital Display Safe NET harness Power Cord 15A 208 230V Defrost Sensor Yellow Air Sensor Black Condensate Pan Assembly Heater Condensate Pan Float Switch Condensate Pan Relay HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Item Part REFRIGERATION CU 4200701 FI 4613274 BR 4916662 FB 4780650 RC 4671505 RC 4671505 RL 4441382 A 1 Hussmann refrigerated merchandisers configured for sale for use in the United States meet or Surpass the requirements of the DOE 2012 energy efficiency standards Description Compressor MD 10 MD 14 Drier Condenser Fan Motor MD 14 Condenser Fan Blade MD 14 Cap Tube Assembly MD 10 Cap Tube Assembly Compressor Relay FLUORESCENT LAMPS AND BALLASTS BA 4480870 Ballast Lamp BU 4481664 Lamp SW 4440542 Switch Lamp BU 4441810 BU 441801 EP 4481668 TP 4919286 TP 4919287 TP 4998080 TP 4997870 LED FIXTURES AND POWER SUPPLY LED Light Tube 3ft MD 10 LED Light Tube 4ft MD 14 Power Supply Front Acrylic MD 10 Front Acrylic MD 14 Honeycomb MD 10 Honeycomb MD 14 MD Open Vertical Merchandisers 2 APPENDIX TECHNICAL DATA MD Plan View Dimensions shown as inches and mm 8 3 8 213 gt 4 1 4 108 gt DRAIN REFRIGERATION OUTLET ELECTRICAL OUTLET 17 1 8 435 7 3 4 197 y Front of Merchandiser 4 102 gt lt 3 7 8 98
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