2402646_B MD Installation and Service Manual
Contents
1. 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 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 S Protective Shield Bulb S End Cap Remove Plastic Pins Attaching Display Lamp P N 2402646_B 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 lights fans heaters and thermostats U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com APPENDIX A TECHNICAL DATA Item Part Description Item Part FAN ASSEMBLIES AND THERMOSTATS REFRIGERATION SW Standard Fan Assembly CU 4200701 MO 4411019 Fan Motor 115V CU 4200700 with blade FI 4613274 FI4613274 3 Electronic Control MD BR 4916662 EP 4441283 Power Cord 15A 208 230V FB 4780650 HEATERS RC 4671505 DP 4919020 Condensate Pan Heater RC 4671505 1000W 208 230V A 1 Description Compressor MD 14 Compressor MD 10 Drier2. 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 A 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 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 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 Mexico 1 800 522 1900 www hussmann com P N 2402646_B 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 i or L DN UAR ANM tt Vini re iii E eue nin m tru tt T TI 1 MANT Haiti ROUEN Airflow blockage increases energy consumption and reduces the merchandiser s ability
3. Condenser Fan Motor 16W Condenser Fan Blade MD 14 Cap Tube Assembly MD 10 Cap Tube Assembly LAMPS AND BALLASTS CONTROL PANEL BA 4480870 Ballast Lamp RL 4441382 Compressor Relay BU 4481664 Lamp SW 4440542 Switch Lamp Fluorescent Lamps Replace with Like Fixtures HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A MD Open Vertical Merchandisers A 2 APPENDIX A 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 T 3 4 197 T Front of Merchandiser 4 102 gt lt Y 3 7 8 98 MD 10 MD 10 P N 2402646 B U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 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 S 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 CI CO F 34 32 77 1956 Condensing Unit hp MD 10 3 4 MD 14 l Condensing Unit Capacity MD 10 4813 MD 14 7376 Btu hr at std rating conditions lt t 33 5 8 854 DEFROST DATA Frequency hr l OFFTIME Failsafe minutes 8 Defrost Termination Time PHYSICAL DATA Refrigerant Charge MD 10 R134a 25 50z 0 723 kg
4. HUSSMANnNN LISTED MD Medium Temperature Self Contained Open Vertical Merchandisers Installation amp Service Manual avr ne oc P P N 2402646 B cO December 2010 e ll P N 2402646_B 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 IH i Lr Gc m n n n 12999 St Charles Rock Road Bridgeton MO 63044 2483 U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com 2010 Hussmann Corporation TABLE OF CONTENTS ANSI DEFINITIONS INSTALLATION CEPULHCOUO ine tease ie ES ees Hussmann Product Control Shipping Damage I OCA UO B darsi e ethno arie ea nd self Contained Location Model Description Unloading Exterior Loading shipping Skid 2426366544 5u440k eae 42 Merchandiser Leveling serial Plate Location Refrigeration Unit Access Casters Sealing Merchandiser to Floor ELECTRICAL REFRIGERATION Merchandiser Electrical Data Field WITTE ais ed Rea RE ERES Electrical Connections Electrical Outlet Power Switch ReMi Serion 3 225 ane 2 0 dco rao ure eS Water Outlet and Water Seal START UP OPERATION Sta
5. 1 Push the upper button until a parameter r01 is shown 2 Push the upper or the lower button and find that parameter you want to change 3 Push the middle button until the parameter value is shown 4 Push the upper or the lower button and select the new value 5 Push the middle button againt to enter the value Cutout alarm relay receipt alarm see alarm code e Push briefly the upper button If there are several alarm codes they are found in a rolling stack Push the uppermost or lowermost button to scan the rolling stack Set temperature 1 Push the middle button until the temperature value is Shown 2 Push the upper or the lower button and select the new value 3 Push the middle button to select the setting Manual start or stop of a defrost e Push the lower button for four seconds 100 tight The buttons and the seal are imbedded in the front A special moulding technique unites the hard front plastic the softer buttons and the seal so that they become an integral part of the front panel There are no openings that can receive moisture or dirt Illustrations and copy on this page are reprinted with permission from Danfoss U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com P N 2402646_B 3 3 Menu survey EKC 102A SW 1 1x Function edes setting setting Normal operation Temperature setpoint 0 99C 2c 0 Thermostat gt S o o Thermostat Differential r01
6. MD 14 R134a 30 25 oz 0 857 kg HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A MD Open Vertical Merchandisers A 4 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 Number of Fans SW 2 Amperes Watts Evaporator Fans 208 230V 60Hz Standard 0 6 10 Condensate Pan Heaters 230V 4 8 1000 Condensing Unit 208 230V 1Ph 60Hz Standard MD 10 MD 14 Compressor LRA 42 4 Compressor RLA 10 3 9 5 Product Data MD 10 AHRI Total Display Area Sq FtlCase 18 42 ft case 1 711 m case MD 14 AHRI Total Display Area Sq FtlCase 15 97 ft case 1 483 m2 case Computed using AHRI 1200 standard methodology Total Display Area ft m Unit of Length ft m P N 2402646 B U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 e www hussmann com APPENDIX A WIRING DIAGRAM A 5 ELECTRIC SPECS MODEL VOLTAGE FREQUENCY COMPRESSOR NJ6220Z EMBRACO WARNING TO AVOID DAMAGING THE EQUIPMENT UNPLUG FROM ALL POWER SOURCES PRIOR TO MAKING ANY REPAIRS li SENSOR CONTROL E tn x FAN N w CONDENSER BK W FAN MOTOR E FAN CONDENSER W SWITCH OPTIONAL BK W T STAT LIMIT CONDENSER HEATER BK w C X 2 pua 208V 230V 7 WARNING All components must have mechanical ground and the merchandiser must be grounded CIRCLED NUMBERS Parts List ITEM NUMBERS R
7. 0 1 K 20 K 2K 1 Max limitation of setpoint setting 49 C 99 C 15 Adjustment of temperature indication a E K 20 K OK Temperature unit CPF r05 S s i Conscion othe sgnal fem saz ao au oe ak neg ola a Manual service C1 stop regulation 0 start regulation 1 r12 1 1 1 1 J VOS a a Min ON time 0 min 30 min 0 min Min OFF time 0 min min 0 min Defrost method O none 1 natural d01 T E A E E E A E Max defost duration eoa omn Somn 45min 8 Displacement of time on cutin of defrost at startup f dos omin 240min Omin 45 _ Defrost sensor 0 time 1 Sair d10 0 1 Defrost at start up d13 no es no TS Miscellaneous Access code 005 0 100 0 0 Used sensor type Pt PTC NTC 006 Pt ntc Pt PTC Refrigeration or heat rE refrigeration HE heat 007 rE HE rE HE Display step 0 5 normal 0 1 at Pt sensor 015 no yes no ND Save the controllers present settings to the programming 065 0 25 0 0 key Select your own number Load a set of settings from the programming key previ ously saved via 065 function Can only be set when regulation is stopped r12 0 Replace the controllers factory settings with the present settings Service Status on relay u58 Can be controlled manually but only when r12 1 Factory setting If you need to return to the factory set values it can be done in this way Cut out the supply voltage to the controller Keep upper a
8. 32 F 24 Off Time Time Dairy Deli 1 The EKC controller controls refrigeration Defrosts are time initiated and terminated for temperature This 1s factory installed in the self contained models The defrost setting 1s control panel mounted on the merchandiser s factory set as shown above fascia Measure discharge air temperatures at the center of the louvers 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 It is the contractor s responsibility to replacing any electrical component This install merchandiser s in accordance with includes but is not limited to such items as all local building and health codes doors lights fans heaters and thermostats P N 2402646 B U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 www hussmann com P N 2402646 B 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 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 perforations in the rear wall The shelves are rated for 130 pounds each load capacity Install the
9. Grill Do Not Block Merchandiser Air Flow MD Open Vertical Merchandisers 3 10 START UP OPERATION THERMOMETER The thermometer is located next to the discharge in the middle of the merchandiser The reading is in C F WA H N N G Product will be degraded and may spoil if allowed to sit in a non refrigerated area LIGHTING Interior lighting is 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 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 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 On the top exterior of the cabinet there is a perfo rated metal cover Lower the lamp fixture as 1f you were replacing the ballast Lift the left retainer Pull the night cover towards you and slide to left Inst
10. 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 affect perfor mance and may damage the refrigeration system a Zero Clearance at Sides Plan View Air Intake Exhaust Front SN V 24 in Clearance at Front 5 in Clearance at Rear P N 2402646 B U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 www hussmann com P N 2402646 B MODEL DESCRIPTION The MD models are open vertic
11. must be unplugged before starting any cleaning or service work N CAUTION 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 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 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 All lower base panels must be in place when the refrigerator 1s operating If not air flow from the condenser will be directed o
12. 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 if load limit is violated AT NO TIME SHOULD MERCHANDISERS BE STOCKED BEYOND THE LOAD LIMITS INDICATED DO NOT BLOCK DISCHARGE AIR LOUVERS HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 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 Product Past Front of Shelves Do Not Allow Product to Block Return Air
13. 3044 2483 www hussmann com am Ingersoll Rand
14. E OF OPERATION MD Compressor Starts Time to Subsequent Defrost Initial Defrost 1 Hour 45 Min After Start Up Pull down Compressor On Compressor runs Refrigeration Cycle continuously until it reaches its cut out setting Maximum Defrost Time 8 Minutes Failsafe Defrost cycle is time terminated Defrost initiates 45 minutes after start up Compressor When powered up there will Starts be a delay of 180 sec at start up before the compressor starts ON OFF A AN Compressor 4 Start Up Off Cycle 1 The compressor will start after a 180 seconds delay once power is applied 2 The compressor will continue to run until it reaches its cut out temperature Pulldown 3 The refrigeration cycle will continue for the next subsequent scheduled 1 hour 4 The above process will repeat steps 3 and 4 until the power 1s interrupted 5 If power stops the process will start over at step 1 and the time to subsequent defrost will reset HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 3 7 Time to Subsequent Defrost 1 Hour Pulldown After Defrost Compressor ON Maximum Defrost Time 8 Minutes Failsafe MD Open Vertical Merchandisers 3 8 START UP OPERATION CONTROLS and ADJUSTMENTS Refrigeration Defrost Controls Controls Product Discharge Air Defrost Type of Termination Failsafe Application Temperature Frequency Defrost Temperature Time per day Minutes Medium Temp 24 F to
15. K 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 MAJEURE AAA ee LI RE TES 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 15R Receptacle 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
16. Red Y Yellow G Green BL Blue BK Black W White e 120V POWER O 120V NEUTRAL l FIELD GROUND mmm CASE GROUND HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A MD Open Vertical Merchandisers A 6 APPENDIX A WIRING DIAGRAM ELECTRIC SPECS MODEL MD142M VOLTAGE 208 230 V FREQUENCY 60 HZ COMPRESSOR NJ622Z EMBRACO WARNING TO AVOID DAMAGING THE EQUIPMENT UNPLUG FROM ALL POWER SOURCES PRIOR TO MAKING ANY REPAIRS pe CONTROL COMPRESSOR a o FAN w CONDENSER RELAY BK W FAN MOTOR T BK FAN CONDENSER SWITCH EN OPTIONAL C Boece BK ve OPTIONAL w aa T STAT LIMIT CONDENSER HEATER EN Yd P 208V 230V WARNING All components must have mechanical ground and the merchandiser must be grounded CIRCLED NUMBERS Parts List ITEM NUMBERS R Red Y Yellow G Green BL Blue BK Black W White e 120V POWER O 120V NEUTRAL P N 2402646_B l FIELD GROUND mh CASE GROUND U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com s NT Mr K OS i S ee S To obtain warranty information ey Cy or other support contact your Se 96 Hussmann representative Q0 6S Please include the model and Oo S serial number of the product QU NM l l l l E E o G U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 G C www hussmann com SA E ae ee K Hussmann Corporation 12999 St Charles Rock Road Bridgeton MO 6
17. al medium temperature display merchandisers They are self contained merchandisers with their own condensing unit Each self contained model will have its own condensing unit factory installed beneath the display area of the case ready for operation when electrical service 1s connected A CAUTION 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 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 ea
18. all the new cover in reverse order P N 2402646 B U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 www hussmann com P N 2402646 B 4 1 MAINTENANCE CARE AND CLEANING Long life and satisfactory performance of any equipment 1s 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 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 1f excess water 1s used in cleaning Do NOT Use Abrasive cleansers and scouring pads as these will mar the finish Coarse paper towels on coated glass eAmmonia 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 ou
19. and shipping date of all equipment is recorded in Hussmanns 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 1s 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 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 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 1s maintained at or below the ANSI NSF 7 specified level and relative humidity 1s 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
20. basket ON Replace fan motor and blade 7 Lower fan plenum OO Reconnect fan to wiring harness 9 Turn on power 10 Verify that motor 1s working and blade is 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 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 lights fans heaters and thermostats 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 12 Reinstall display pans Bring merchandiser to operating temperature before restocking Fan Assembly ae I K MEN gt ce QU dum Fan Blade Airflow Direction Motor Plenum Note Plenum length 1 and number of fans will Q vary with model TE B MD Open Vertical Merchandisers 5 2 SERVICE REPLACING ELECTRONIC BALLASTS Canopy Ballast The canopy ballast is located in the electrical box on top of the merchandiser
21. ch 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 1s 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 N WARNING 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 such as model serial number amperage rating refrigerant type and charge n 1 865 gS EI HIR Serial Plate rren Br KR aLULAAG EK 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 remo
22. elay will cut in at setpoint minus differential Display step Yes Gives steps of 0 5 No Gives steps of 0 1 Copy the controller s present settings With this function the controller s settings can be trans ferred to a programming key The key can contain up to 25 different sets Select a number When copying has started the display returns to 065 After two seconds you can move into the menu again and check whether the copying was satisfactory Showing of a negative figure spells problems See the significance in the Fault Message section Copy from the programming key This function downloads a set of settings earlier saved in the controller Select the relevant number When copying has started the display returns to 066 After two seconds you can move back into the mennu again and check whether the copying was satisfactory Showing of a negative figure spells problems See the significance in the Fault Message section Save as factory setting With this setting you save the controller s actual settings as a new basic setting the earlier factory settings are overwritten HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Operating status The controller goes through some regulating situations where it is just waiting for the next point of the regulation To make these why is nothing happening situations visible you can see an operating status on the display Push briefly 1s the upper but ton If there is a s
23. frost starts d03 The function is zeroset and will start the timer function at each defrost start When the time has expired the func tion will start a defrost The function is used as a simple defrost start or it may be used as a Safeguard if the normal signal fails to appear When there is defrost with clock function on the DI input the interval time must be set for a somewhat longer period of time than the planned one as the interval time will otherwise start a defrost which a little later will be followed by the planned one The interval time is not active when set to 0 Max defrost duration This setting is a safety time so that the defrost will be stopped if there has not already been a stop based on temperature The setting will be the defrost time if d10 is selected to be 0 Illustrations and copy on this page are reprinted with permission from Danfoss U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com P N 2402646_B Time staggering for defrost cutins during start up The function is only relevant if you have several refrigera tion appliances or groups where you want the defrost to be staggered in relation to one another The function is furthermore only relevant if you have chosen defrost with interval start d03 The function delays the interval time d03 by the set number of minutes but it only does it once and this at the very first defrost taking place when voltage is con nected
24. nd lower button depressed at the same time as you reconnect the supply voltage Fault code display A45 Standby mode Alarm code displa E1 Fault in controller Status code displa Regulating S11 Refrigeration stopped by thermostat S14 Defrost sequence Defrosting Emergency cooling Delay of output at start up The defrost temperature cannot be displayed There is no sensor d Defrost in progress First cooling after defrost Illustrations and copy on this page are reprinted with PS Password required Set password Rs 7 P permission from Danfoss HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A MD Open Vertical Merchandisers 3 4 P N 2402646_B START UP OPERATION Functions Here is a description of the individual functions A controller only contains this part of the functions Cf the menu survey Normal display Normal display shows the temperature value from the thermostat sensor Sair Thermostat Set point Regulation is based on the set value plus a displacement if applicable The value is set via a push on the centre button The set value can be locked or limited to a range with the settings in r02 and r 03 The reference at any time can be seen in u28 Temp ref Differential When the temperaure is higher than the reference the set differential the compressor relay will be cut in It will cut out again when the temperature comes down to the set reference Setpoin
25. not observed when defrosts start Min ON time in minutes Min OFF time in minutes Reversed relay function for compressor relay 0 Normal function where the relay cuts in when refrig eration is demanded Reversed function where the relay cuts out when refrigeration is demanded this wiring produces the result that there will be refrigeration if the supply volt age to the controller fails When two compressors are cut in and out the two relays will operate in opposite directions The controller contains a timer function that is zeroset after each defrost start The timer function will start a defrost if when the interval time is passed The timer function starts when voltage is connected to the controller but it is displaced the first time by the set ting in dO5 Defrost start can also be accomplished via manual start up Defrost is accomplished with natural defrost The actual defrost will be stopped based on time or tem perature with a signal from a temperature sensor Defrost method Here you set whether defrost is to be accomplished with electricity natural or non A natural 1 non 0 During defrost the defrost relay will be cut in When gas defrosting the compressor relay will be cut in during defrost Defrost stop temperature The defrost is stopped at a given temperature which is measured with a sensor the sensor is defined in d10 The temperature value is set Interval between de
26. ote Line Sizing Koolgas page 2 2 3 Added Electronic Control Section 3 4 Added Technical Data Appendix A ORIGINAL ISSUE AUGUST 2005 Veo e ve we Ve owe Ve we Ve X Ve e Ve X eoo eoo X X X X X ESE 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 A 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 B U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 www hussmann com P N 2402646 B 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
27. ration Display The values will be shown with three digits and with a setting you can determine whether the temperature are to be shown in C or in F Es Light emitting diodes LED on front panel There are LED s on the front panel which will light up when the belonging relay is activated Se Refrigeration EE Defrost The light emitting diodes will flash when there is an alarm In this situation you can download the error code to the display and cancel sign for the alarm by giving the top button a brief push Defrost During defrost a d is shown in the display This view will continue up till 15 min after the cooling has resumed However the view of d will be discontinued if The temperature is suitable within the 15 minutes The regulation is stopped with Main Switch A high temperature alarm appears P N 2402646 B The buttons When you want to change a setting the upper and the lower buttons will give you a higher or lower value depending on the button you are pushing But before you change the value you must have access to the menu You obtain this by pushing the upper button for a couple of seconds you will then enter the col umn with parameter codes Find the parameter code you want to change and push the middle buttons until value for the parameter is Shown When you have changed the value save the new value by once more pushing the middle button Examples Set menu
28. rt Up IDEDLOSL rr Operation Menu Survey FUCUS 245 50 T tod RM Ed Control Diagram Ordering HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A V Sequence of Operation 3 7 Controls and Adjustments 3 8 TEV Adjustment 0 3 8 Load LIMIS 52425 2 33 Bond Cas 3 9 SHelVeS aus dut dam m EEE S 3 9 Load LIMIS e evimiou t ue bees des 3 9 DIOCKIHP Lausuwbbete5a d dest raso bd 3 9 Thermometer u s sobre tci s 3 10 LISBUDE uud dioe os eid eee 3 10 NIS COVED os dostes trad vasi detained 3 10 MAINTENANCE Care and Cleaning 4 DO INOW Se a arb que acte T Endet 4 pn Ho 4 Removing Scratches from Bumper 4 2 Cleaning Under Fan Plenum 4 2 Cleaning Stainless Steel Surfaces 4 2 Cleaning Discharge Honeycomb 4 3 Cleaning Cols 4 s d p umts see eae ee 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 Patt NUMDEIS 2 025 odo 9 99 RES A 1 PANEN Arr oc ole tg Tt 0 A HE A 2 Cross Section and Refrigeration Data A 3 Pl ctrical Data xiu Se ER ee A 4 MD 10 Wiring Diagram A 5 MD 14 Wiring Diagram A 6 WARRANTY MD Open Vertical Merchandisers vi REVISION HISTORY REVISION B DECEMBER 2010 1 Added self contained location drawings page 1 2 2 Added Rem
29. s to or from a copying key with functions 065 or 066 the following information may appear 0 Copying concluded and OK 4 Copying key not correctly mounted 5 Copying was not correct Repeat copying 6 Copying to EKC incorrect Repeat copying 7 Copying to copying key incorrect Repeat copying 8 Copying not possible Order number or SW version do not match 9 Communication error and timeout 0 Copying still going on The information can be found in 065 or 066 a couple of seconds after copying has been started Illustrations and copy on this page are reprinted with permission from Danfoss MD Open Vertical Merchandisers 3 6 START UP OPERATION Power supply EKC 1 02A 33 230 V a c e Sensors Sair is thermostat sensors Digital On Off signals A cut in input will activate a function The possible functions are described in menu 002 Relays The general connections are Relay 1 Refrigeration The contact will cut in when the controller Ay Py demands refrigeration 230V DC Sair 115 V Electric noise Cables for sensors and DI inputs must be kept separate from other electric cables Use separate cable trays Keep a distance between cables of at least 10 cm Long cables at the DI input should be avoided Illustrations and copy on this page are reprinted with permission from Danfoss P N 2402646 B U S amp Canada 1 800 922 1919 e Mexico 1 800 522 1900 www hussmann com P N 2402646 B SEQUENC
30. t limitation The controller s setting range for the setpoint may be narrowed down so that much too high or much too low values are not set accidentally with resulting damages To avoid a too high setting of the setpoint the max al r02 lowable reference value must be lowered To avoid a too low setting of the setpoint the min allow r03 able reference value must be increased Correction of the display s temperature showing If the temperature at the products and the temperature received by the controller are not identical an offset adjustment of the shown display temperature can be carried out Temperature unit r05 Set here if the controller is to show temperature values in C or in F Correction of signal from Sair r09 Compensation possibility through long sensor cable Start stop of refrigeration r12 With this setting refrigeration can be started stopped or a manual override of the outputs can be allowed 1 regulation 0 regulation is stopped 1 regulation is stopped override allowed Stopped regulation will give a Standby alarm Compressor The compressor relay works in conjunction with the thermostat When the thermostat calls for refrigeration will the compressor relay be operated Running times To prevent irregular operation values can be set for the time the compressor is to run once it has been started And for how long it at least has to be stopped The running times are
31. tatus code it will be shown on the display The individual status codes have the following meanings SO Regulating S2 When the compressor is operating it must run for at least x minutes 3 When the compressor is stopped it must remain stopped for at least x minutes S10 Refrigeration stopped by main switch Either with r12 or a Dl input 20 Emergency cooling S25 Manual control of outputs 32 Delay on outputs during start up Other displays non The defrost temperature cannot be displayed There is no sensor d Defrost in progress First cooling after defrost PS Password required Set password Fault message In an error situation the LED s on the front will flash and the alarm relay will be activated If you push the top button in this situation you can see the alarm report in the display If there are several you can continue pushing to see them There are two kinds of error reports it can either be an alarm occurring during the daily operation or there may be a defect in the installation A alarms will not become visible until the set time delay has expired E alarms on the other hand will become visible the moment the error occurs An A alarm will not be visible as long as there is an active E alarm Here are the messages that may appear A45 Standby position stopped refrigeration via r12 or Dl input E1 Faults in the controller E29 Sensor error on Sair When copying setting
32. tlet 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 horoughly 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 ake care to minimize direct contact between fan motors and cleaning or rinse water e Do NOT flood merchandiser with water NEVER INTRODUCE WATER FASTER THAN THE WASTE OUTLET CAN REMOVE IT N WARNING 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 e Allow merchandisers to dry before resuming operation eAfter cleaning is completed turn on power to the merchandiser MD Open Vertical Merchandisers 4 2 MAINTENANCE N WARNING 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 N WARNING SHUT FANS OFF DURING CLEANING PROCESS P N 2402646 B
33. 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 overflow 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 B N CAUTION Evaporation Pan is Hot and poses risk of bodily injury Always Wear glo
34. to the controller The function will be active after each and every power failure Defrost sensor Here you define the defrost sensor 0 None defrost is based on time EKC 102A 1 Sair Defrost during start up follow after d05 function Here you can set if the controller is to start with a defrost if the power has been cut Miscellaneous Delay of output signal after start up After start up or a power failure the controller s functions can be delayed so that overloading of the electricity sup ply network is avoided Here you can set the time delay Access code 1 Access to all settings If the settings in the controller are to be protected with an access code you can set a numerical value between 0 and 100 If not you can cancel the function with setting 0 99 will always give you access Sensor type Normally a Pt 1000 sensor with great signal accuracy is used But you can also use a sensor with another signal accuracy That may either be a PTC sensor 1000 ohm at 25 C or an NTC sensor 5000 Ohm at 25 C All the mounted sensors must be of the same type Function options The thermostat s function is defined as follows rE Refrigeration The relay cuts in when lower tempera tures are required HE Heating The relay cuts in when higher temperatures are required remember to cancel defrost functions and compressor functions With this function the thermostat s differential will lie below the setpoint the r
35. ved 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 P N 2402646 B Lower Front Panel Removal H 5 Screw A Lower Front Panel e 2d To Install To wn Base CASTERS The merchandiser may be equipped with optional casters If the merchandiser has optional casters as shown below use the brake to lock the merchandiser 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 1n 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 U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com P N 2402646 B 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 CHEC
36. ver the evaporator pan and defrost water in the pan may overflow WARNING Product will be degraded and may spoil if allowed to sit in a non refrigerated area P N 2402646 B U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com P N 2402646 B 3 1 START UP OPERATION START UP Check all electrical and refrigeration connec tions thoroughly for tightness Make sure the refrigeration unit is not rubbing or chafing against itself or other components Electrical connections should be tight Condenser fan motor blades should spin freely Install all protective covers Start the merchan diser and wait for the merchandiser to pull n down in temperature Your refrigerated merchandiser uses a Danfoss electronic controller for temperature control DEFROST Defrost 1s set up for 8 minutes every hour When the defrost starts the defrost timers are set to zero WARNING Danfoss EKC102A temperature controller has Product will be degraded and may spoil if one relay output and one temperature sensor allowed to sit in a non refrigerated area Temperature control at start and stop of the compressor Natural defrost occurs at stop of compressor Illustrations and copy on this page are reprinted with permission from Danfoss HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A MD Open Vertical Merchandisers 3 2 START UP OPERATION Ope
37. ves and protective eye wear when servicing Turn off evaporation pan heater and allow pan to cool PRECAUTION CLEANING PRECAUTIONS When Cleaning Do not use high pressure water hoses 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 e Do NOT use a chlorinated cleaner on any surface e Do NOT use abrasives or steel wool scouring pads these will mar the finish U S amp Canada 1 800 922 1919 Mexico 1 800 522 1900 www hussmann com P N 2402646 B 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 Remove product and place in a refrigerated area Turn off power to the merchandiser pd 2 Remove bottom display pans U2 Disconnect fan from wiring harness 4 Remove fan blade A Lift fan plenum and remove screws hold ing bottom of motor to fan
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