DDSS-4MC - Hussmann
Contents
1. 51 1295 48 1 8 1222 25 1 2 648 gt 7 3 4 197 Refrigerati Outlet 5 1 2 140 4 in Minimum Clearance se condensing 17 3 4 N eM 305 Unit 451 1 i 21 5 8 6 550 28 1 4 718 NE on 30 1 2 d L si 775 Electrical Drain Control Outlets FRONT Panel General Case Length Note Includes One Pair Ends Aft 51 1295 Maximum O S dimension of case back to front 30 2 775 Note Includes bumper Waste Outlet RH end of case from outside of End Assembly 25 1 2 648 to center of waste outlet P N 0515957 E U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com APPENDIX A TECHNICAL DATA Dimensions shown as inches and mm DDSS 4MC 6 1 2 165 4 in Minimum Clearance E 22 1 8 Condensing Unit 562 for Optional Self Contained Ss DDSS4MC HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A REFRIGERATION DATA Note This data is based on store temperature and humidity that does not exceed 80 F and 55 R H unless otherwise stated Schedule defrost at night while lights are off DDSS 4MC Thermostat Setting CIJCO F Position 1 34 31 position 7 34 14 Condensing Unit hp 1 Condensing Unit Cap2. eras A 1 Plan View DDSS 4MC A 2 Cross Sections and Refrigeration Data A 3 Electrical Data A 4 self Contained Wiring Diagram A 5 Remote Wiring Diagram WARRANTY DDSS Open Vertical Merchandisers vi REVISION HISTORY REVISION E FEBRUARY 2012 1 Updated Wiring Diagrams 2 Updated Mexico phone number REVISION D JANUARY 2012 1 Removed DDSS 4 Model 2 Added new part numbers 3 Revised refrigeration data 4 Added LED replacement Page 5 2 REVISION C MAY 2011 1 Revised Cross Section Shelf Length page A 4 REVISION B OCTOBER 2010 1 Added self contained location drawings page 1 2 Added Remote Line Sizing Koolgas page 2 2 Added Koolgas and Remote Refrigeration page 2 9 Added TEV drawing and adjustment page 3 8 Added Cleaning Precautions page 4 4 QN nA BW WN Added dimension drawings amp technical data pages A 1 A 2 ORIGINAL ISSUE MARCH 2010 P N 0515957_E Ve oe ve we ve we RR RR RR RR RR RR RRR RS ANSI 7535 5 DEFINITIONS DANGER Indicate s a hazardous A 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 e CAUTION Indicate s a hazardous situation which if not avoided could result in minor or moderate injury NOTICE Not related to persona
3. HUSSMANNA Ww 0 c YL Jus EPH LISTED DDSS 4MC Medium Temperature Remote and Self Contained Open Vertical Merchandisers DDSS 4MC Installation amp e Service Manual gr Na oc 9 P N 0515957 E xO February 2012 S P N 0515957_E 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 Hi uU F Gc m n 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 BEFORE LOADING PRODUCT ANSI DEFINITIONS INSTALLATION Certification 54 ga aunicee se ent aaceeee Hussmann Product Control Shipping Damage LOCO sess vara oho 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 essa ssors REA RR RE dada Electrical Connections Electrical Outlet Refrigeration Self Contained Line
4. P N 0515957 E U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com P N 0515957_E 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 n a refrigerated area Turn off power to the merchandiser 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 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 s working and blade is turning in the correct direction 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 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 ll Close a r gaps under fan plenum Warmer a
5. Corporate Headquarters Bridgeton Missouri U S A 63044 2483 01 September 2011 amp ve wb ee ras NA amp XL tse ai a ak d ai di a ae ae ae a de dk ur Par AE PA E SER SEHE AA A AA A Fa Fa Fa FS eNO OL SCA NC CA CIR CAL Hussmann Corporation 12999 St Charles Rock Road Bridgeton MO 63044 www hussmann com
6. MANUAL DEFROST 5 a S Note This procedure initiates a manual or forced defrost Warm Cold 1 Note location of knob setting m 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 0515957_E OFF Position 8818 8 Ill 4 s Hussmann Ok O O 9 Safe NET Control Set at Full Cold Position Sate NET Ill 4 s Hussmann O O ak 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 the 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 3 5 Display at Full Cold Model DDSS 4MC Display at 1 Position Model DDSS 4MC 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 DDSS Open Vertical Merch
7. Your refrigerated case uses a Hussmann Safe NET TI 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 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 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 a green SERESTA y Q 7 Hussmann AS Defrost Cycle o yellow ssi A beg P WARN X m Temperature or Sensor Alarm red I dm 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 Sensor Evaporator Temperature Sensor Sensor and Switch Common Defrost Termina
8. 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 eDisconnect 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 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 eAllow merchandisers to dry before resuming operation eAfter cleaning is completed turn on power to the merchandiser DDSS Open Vertical Merchandisers 4 2 MAINTENANCE 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 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 an
9. HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A DDSS Open Vertical Merchandisers 3 10 START UP OPERATION NOTES P N 0515957 E U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com P N 0515957_E 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 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 n 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 WARNING Product will be degraded and may spoil if allowed to sit in a non refrigerated area HUSSMANN CORPORATION e BRIDGETON MO 63044
10. Sizing Remote Models Koolgas Remote Models Oil Traps ProSure DIOP aus Water Outlet and Water Seal START UP OPERATION Safe NET IIITM User Instructions Display Start Up Sequence of Operation Diagram Temperature Adjustment Alarms and Codes Defrost Termination Switch Manual Defrost Temperature Adjustment Sensor to Control Adjustment HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A Controls and Adjustments 3 7 Thermostatic Expansion Valve 3 8 TEV Adjustment 0 3 8 Load Limits near aan 3 9 Stocking said nn eee RES doc Ro OS 3 9 1161113101036187 4 24 64 e 3 vae x en dee eds 3 9 INGLES A544 ns5u2gae Ada mas 3 10 MAINTENANCE Care and Cleaning 4 Do NOT Use us 4 1 DO ees es bas 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 Replacing Electronic Ballasts or LED Power Supplies 5 2 Replacing Fluorescent or LED Fixtures 5 2 Repairing Aluminum Coil 5 2 Replacing Electronic Ballasts 5 2 APPENDIX Part NOM DES xis
11. the United States meet or Surpass the requirements of the DOE 2012 energy efficiency standards DOE 2012 Energy Efficiency Compliant Item Part Description Item Part Description FAN ASSEMBLIES AND THERMOSTATS CONTROL PANEL 12W Standard Fan Assembly SW 4440546 Disconnect Switch 25 Amps MO 4410327 Fan Assembly 208V 230V RL 4441382 Compressor Relay FB 0142780 Fan Blade RL 4480237 Condensate Pan Heater CT 4483049 Safe Net III Controller Relay CC 4482991 Defrost Sensor Yellow EP 4441442 Power Cord 6 20P CC 4482992 Air Sensor Black SS TIP REFRIGERATION CC 4482540 Safe Net III Display F CU 4200819 Compressor 220V 60hz EP 4482541 Safe Net III Harness BR 4916662 Condenser Motor 16W 208V 230V Remote Cases FB 4780650 Condenser Fan Blade 10 n 31 pitch MO 4410327 12 W Energy Efficient Fan Assembly CO 4613825 Condenser FB 0142780 Fan Blade fu800cw25s FI 4916098 Drier MO 4411 064 4W Exhaust Fan VR 4613896 Expansion Valve HEATERS LAMPS AND BALLASTS HE 4851189 Condensate Pan Heater BA 4480870 Ballast Lamp 2 Lamps 208V 230V Fluorescent Lamps DP 4918934 Condensate Pan Replace with Like Fixtures FL 4916870 Floating Switch SW 4440541 Light Let LED OPTION EP 4483187 Power Supply BU 441800 LED Fixture HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A DDSS Open Vertical Merchandisers A 2 APPENDIX A TECHNICAL DATA DDSS 4MC
12. 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 DDSS Open Vertical Merchandisers 3 4 START UP OPERATION TEMPERATURE ADJUSTMENT Rotate the adjustment knob counter clockwise for a warmer setpoint or clockwise for a colder setpoint While the temperature is being adjusted the optional display shows the setpoint cut out value A few seconds after the temper ature 1s set the display reverts to showing the sensed temperature in the merchandiser ALARMS AND CODES FLASHING TEMPERATURE OR SENSOR ALARM LED El 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 El if the case sensor has failed or E2 if the evaporator sensor has failed HUSSmann HUSSmann 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 P N 0515957_E DEFROST TERMINATION SWITCH Merchandisers may use a defrost termination switch instead of an evaporator sensor to terminate a defrost cycle The defrost termination switch 1s temperature activated and senses the completion of defrost Compressor Compressor Off Time If On Time lf Sensor Failed Sensor Failed diu e On Compressor Status Off On Off On Off Time
13. 90 2900 e www hussmann com P N 0515957_E 3 9 LOAD LIMITS Each merchandiser has a load limit decal Shelf A WA R N N G life of perishables will be short if load limit 1s Product will be degraded and may spoil if violated allowed to sit in a non refrigerated area THERMOMETER AT NO TIME SHOULD MERCHANDISERS BE STOCKED BEYOND THE LOAD LIMITS INDICATED DDSS models have a l in thermometer The thermometer 1s located at the top interior of the merchandiser DO NOT BLOCK HONEYCOMB LOAD LIMIT STOCKING Product should NOT be placed inside the merchandisers until merchandisers are at Contour End Shown proper operating temperature Other Optional Ends Available Allow merchandiser 24 hours to operate before loading product Proper rotation of product during stocking 1s necessary to prevent product loss Always bring Do Not Load the oldest product to the front and set the Product Pact newest to the back Front of Shelves AIR DISCHARGE AND RETURN FLUES MUST REMAIN OPEN AND FREE OF OBSTRUCTION AT ALL TIMES to provide proper refrigeration and Do Not Allow air curtain performance Do not allow product Product to Block packages signs etc to block these grilles Do Return Air Grille not use non approved shelving baskets display racks or any accessory that could hamper air curtain performance Do not allow product to be placed outside of LOAD LIMIT the designated load limits in the illustration
14. ING 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 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 NOTE Do NOT load product until AFTER merchandiser operates for 24 hours and reaches desired operating temperature 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 0515957_E 3 3 SEQUENCE OF OPERATION DDSS 4MC Compressor Starts 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 40 Minutes Failsafe Defrost cycle is temperature terminated Defrost initiates two hours after start up Compressor When powered up there will Starts be a delay of 30 sec at start up before the compressor starts ON OFF A AN Compressor _ Start Up Off Cycl
15. MB CLEANING COILS Discharge air honeycomb should be cleaned Condenser coils should be cleaned at least once every six months Dirty honeycomb will per month Additional cleaning may be needed cause merchandisers to perform poorly depending on the operational environment A The honeycomb may be cleaned with a vacuum dirty condenser blocks normal airflow through cleaner Soap and water may be used if all the coils water 1s removed from the honeycomb cells before replacing Be careful not to damage the honeycomb mit ili AU UA bn 10 p AC 001414 l Using a flat object such as a screw driver EE EN 1 gt tara ee l pn behind the rear edge of the honeycomb on on the right hand end and gently pull down 2 Clean with a mild detergent and warm water and dry the honeycomb 3 After cleaning replace in reverse order Damaged honeycomb must be replaced 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 1 Installed Location N 2 Push UP and IN HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A DDSS Open Vertical Merchandisers 4 4 MAINTENANCE CLEANING EVAPORATION PAN The conde
16. Mexico 01 800 890 2900 e www hussmann com APPENDIX A TECHNICAL DATA A 5 DDSS 4MC Self Contained A I WARNING Unplug merchandiser before attempting Electrical Specifications to make any electrical connections Self Contained Voltage 208 230 V Frequency 60HZ ischarge Compressor WM BK oor e Jg BK C d TE j Sa enser N BL W Relay s Evaporator efrost Ci iE Ty PH R Ballast BL BK E LED LAMP OPTION 1 or 2 Row BK R TR O N OO oO E SEE Mower W Level Supply ___ Switch Main Switch T Stat Ce Limit Relay NNE BK Condensate Fan BK Pan Heater 208 230 V 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 4 FiELD GROUND CASE GROUND HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A DDSS Open Vertical Merchandisers A 6 APPENDIX A WIRING DIAGRAMS DDSS 4MCR Remote P N 0515957_E WARNING
17. NN 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 is maintained at or below 55 Recommended operating ambient temperature is between 65 F 18 C to 80 F 26 7 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 DDSS Open Vertical Merchandisers 1 2 INSTALLATION SELF CONTAINED LOCATION Product should always be maintained at proper temperature This means that from the time the Maintain 4 Clearance product 1s received through storage pr
18. OF Unplug merchandiser before attempting e to make any electrical connections 4 Voltage 208 Frequency 60HZ i 208 230V Connect to solenoid valve Contro i E BK e 60HZ or condensing unit B S O 0 d N m ria x9 I9 ante al c 1 1 E Condenser W Fan BL Relay W Evaporator Lamp BL Ballast LED LAMP OPTION 1 or 2 Row CAP OFF THE ENDS Fan Level Sach Main Switch T Stat Relay Limit BK WWW Condenser Heater es 1 a R BK 208 230 V 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 120 NEUTRAL FIELD GROUND mm CASE GROUND U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com NOSIS OOS OS OS OS OS SOCIO FOS te dura dura ee quida EE Ee LG EEG dua dura quM WET dee Con SNS AE A ANS A POE NE AS NB PO FO e S de SA q AG A q DS se R Gs amp 7 ae BE 9 amp IS we Q EN q To obtain warranty information y x or other support contact your SA 9 Hussmann representative 6S Please include the model and Se Gy serial number of the product QU e K Q ated d 5 9 Hussmann Corporation
19. acity 9992 Btu hr at std rating conditions DEFROST DATA Frequency hr 6 OFFTIME Failsafe minutes 40 Defrost Termination Pressure psig 45 F PHYSICAL DATA Refrigerant Charge DDSS 4MC 44 oz 1 248 kg DDSS 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 DDSS 4MC Number of Fans 12W 1 Self Contained Remote Evaporator Fans Amperes Watts Amperes Watts 230V 60Hz Standard 0 33 0 33 50 0 12 18 Condensate Pan Heaters 230V 3 8 750 3 8 750 Condensing Unit 208 230V 1Ph 60Hz Standard Self Contained Compressor LRA 33 7 Compressor RLA 6 8 Minimum Circuit Ampacity Self Contained 230V 1Ph 60HZ Standard 10 85 230V IPH 60Hz Energy Efficient 10 67 Maximum Over Circuit Protection 208 230V Self Contained 20 Maximum Circuit Ampacity Remote 230V 1Ph 07 Standard 4 65 Maximum Over Circuit Protection 208 230V Remote 15 DDSS 4 DDSS4MC AHRI Total Display Area Sq FtlCase 13 01 ft case 1 21 m case 1Computed using AHRI 1200 standard methodology Total Display Area ft m2 Unit of Length ft m ESTIMATED SHIPPING WEIGHT 2 Case Self Contained Remote End lb kg 900 408 850 386 Included 2 Actual weights will vary according to optional kits included P N 0515957 E U S amp Canada 1 800 922 1919 e
20. andisers 3 6 START UP OPERATION Typical Sensor to Control Configuration Black Air Yellow Sheath Evaporator Sensor Defrost Termination Black Evap GH Black Sheath TEE Air Sensor Display A LD 22 GES Com mon for li N C f N 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 Black Air Sensor 8 Black Evaporator Sensor 9 ESQ 11 Not Used White Common Both Sensors 10 Detail A P N 0515957 E U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com P N 0515957_E 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 Minutes DDSS 4MC Medium Temp 24 F to 32 F 4 Off Time 45 F 40 DDSS 4MCR Ven 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 and remote the control panel Adjust this control knob to including Koolgas models The defrost setting maintain the discharge air temperature shown is factory set as shown above Measure discharge air tem
21. chandiser 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 electrical component This includes but is not limited to such items as doors lights fans heaters and thermostats Self contained models have factory nstalled power cords attached at the electrical box NEMA 6 20R Receptacle DDSS 4MC REFRIGERATION Self Contained Models Each self contained model 1s 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 A CAUTION Risk of Electric Shock If cord or plug becomes damaged replace only with a cord and plug of the same type WARNING Merchandiser must be grou
22. d polish surface for a smooth glossy finish 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 WARNING LOCK OUT TAG OUT lo avoid serious injury or death from electrical shock always disconnect the electrical power at the main dis connect when servicing or replacing any electrical com ponent This includes but is not limited to such items as doors lights fans heaters and thermostats P N 0515957_E REMOVING SCRATCHES FROM BUMPER WARNING SHUT FANS OFF DURING CLEANING PROCESS 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 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 U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com P N 0515957_E 4 3 CLEANING DISCHARGE HONEYCO
23. e Safe NET Ill ee GREEN REFRIGERATION YELLOW DEFROST RED ALARM OFF POSITION Safe Net Ill 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 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 1 minute delay once power is applied HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A 4 Time to Subsequent Defrost 6 Hours or Demand Defrost 2 7 5 Time to Subsequent Defrost 6 Hours or Demand Defrost Pulldown After Defrost Compressor ON Maximum Defrost Time 40 Minutes Failsafe Defrost Cycle Terminates at 45 F GREEN REFRIGERATION YELLOW DEFROST RED ALARM DISPLAY 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 6 hours or demand defrost The digital display will display the temperature reading for 10 minutes after defrost
24. e 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 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 LAY MERCHANDISER OVER ON THE FLOOR TO REMOVE 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 se
25. e if it 1s a level area Determine the highest part of the floor WARNING Do NOT remove shipping crate until the merchandiser is positioned DDSS 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 5 7 ts OD Fre o BEN me USTED 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 proce dure Ensure lower front panel is flat against the floor when installed to prevent air circulation problems on self contained merchandisers P N 0515957_E Lower Front Panel Removal fl A ED Lower Front Panel 2d To Install To 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 U
26. eparation 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 4 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 Air Exhaust Keep discharge and intake areas free from air currents Maintain 4 in Clearance around all sides Plan View Air Intake ttit 4 Front Back Air Exhaust P N 0515957 E U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 e www hussmann com P N 0515957_E MODEL DESCRIPTION The DDSS models are open vertical medium temperature display merchandisers They are available as either remote type which require a separate condensing unit connection or self contained 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 clos
27. ir 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 Speed Nut Fan Blade Airflow Direction Motor Plenum Note Plenum length COE and number of fans will vary with model DDSS Open Vertical Merchandisers 5 2 SERVICE REPLACING ELECTRONIC BALLASTS OR LED POWER SUPPLIES The canopy ballast or LED power supply 1s located n the electrical box on top of the merchandiser To gain access l DISCONNECT THE ELECTRICAL POWER TO THE MERCHANDISER 2 Remove screws attaching the wireway cover then remove cover 3 Service or replace ballast LED power supply as required Reassemble items as they were originally installed 4 Reconnect the electrical power REPLACING FLUORESCENT LAMPS OR LED FIXTURES Fluorescent lamps have a plastic shield When the lamp is replaced keep the lamp shield to install over the new lamp LED Fixtures have the protective shield incor porated Remove fluorescent fixtures the same way as fluorescent bulbs The switch under the display lamp cover oper ates both the display lamp and interior lamps A WARNING Fluorescent lamps contain mercury vapor Mercu
28. l injury Indicates s situations which if not avoided could result in damage to equipment U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com P N 0515957_E 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 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 HUSSMA
29. l risers P N 0515957 E Pressure Drop Keep refrigerant line runs as short as possible to avoid large pressure drops Use a minimum number of elbows Where elbows are required USE LONG RADIUS ELBOWS ONLY 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 is located in the center of the merchandiser The outlet has an external water seal installed from the factory For self contained and remote models this water seal drains into the condensate evapora tion pan located beneath the merchandiser Remote models have a fan to circulate air around the base to keep condensation from forming NOTE All lower base panels must be in place when the refrigerator 1s operating If not air flow from the condenser self contained will be directed over the evaporation pan and defrost water 1n the pan may overflow 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 0515957_E START UP OPERATION TE ATTENTION INSTALLER It is the contractor s responsibility to install merchandiser s in accordance with all local building and health codes Safe NET I M TEMPERATURE AND DEFROST CONTROLLER SAFE NET HIM USER INSTRUCTIONS
30. nded Do not remove the power supply cord ground DDSS Open Vertical Merchandisers 2 2 INSTALLATION LINE SIZING Remote Models Refrigerant line connections are made at the right end of merchandiser facing front beneath the refrigerated display area The refrigerant line connection size is 8 in The suction line is s in Refrigerant lines should be sized as shown on the refrigeration legend that is furnished for the store or according to ASHRAE guidelines WARNING Refrigeration lines are under pressure Refrigerant must be recovered before attempting any connection or repair For refrigerators with other than Koolgas defrost the suction and liquid line should be clamped and or taped together and insulated for a minimum of 30 feet from the refrigerator KOOLGAS Remote Models If Koolgas defrost 1s used the liquid line will need to be increased two sizes larger inside the merchandiser area This is necessary to ensure even liquid drainage from all evaporators during defrost Refrigerators with Koolgas defrost SHOULD NOT have their liquid lines and suction lines in contact with each other but are to be separately insulated for a minimum of 30 ft from the refrigerator Additional information for the balance of the refrigerant lines 1s recom mended and required wherever condensation and dripping would be objectionable Oil Traps P traps oil traps must be installed at the base of all suction line vertica
31. nlock 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 U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com P N 0515957_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 ALWAYS CHECK THE SERIAL PLATE FOR COMPONENT AMPERES ELECTRICAL CONNECTIONS All wiring must be in compliance with NEC and local codes All electrical connections for remote models are to be made in the electrical Handy Box located behind the removable base panel at the left end of the merchandiser when facing the discharge honeycomb 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 mer
32. nsate water outlet empties into a limited capacity evaporation pan N WAHR N N G Debris or dirt accumulation inside the condensate Evaporation Pan is Hot evaporation pan or on the heater coil will and poses risk of bodily injury Always Wear gloves reduce the pan s evaporation capacity and and protective eye wear when servicing Turn off cause premature heater failure The evaporation evaporation pan heater and allow pan to cool pan waste water will overflow and spill onto the floor 1f the heater is 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 PRECAUTION CLEANING PRECAUTIONS When Cleaning Do not use high pressure water hoses e Do not introduce water faster than waste outlet can drain 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 NOI use a chlorinated cleaner on any surface Do NOT use abrasives or steel wool scouring pads these will mar the finish
33. peratures at the center of the honeycomb To ensure a thorough defrost defrost must be terminated by the temperature termination setting not by time HUSSMANN CORPORATION e BRIDGETON MO 63044 2483 U S A DDSS Open Vertical Merchandisers 3 8 START UP OPERATION THERMOSTATIC EXPANSION VALVE TEV Each self contained merchandiser has its own evaporator coil and a pre set thermostatic expansion valve TEV The TEV has been factory set at design conditions to provide the recommended performance TEV Adjustment Expansion valves may be adjusted to fully feed the evaporator Before attempting to adjust valves make sure the evaporator 1s clear or only lightly covered with frost and the merchandiser is within 10 F of its expected operating temperature Adjust the valve as Follows a Attach a probe to the suction line near the expansion valve bulb b Obtain a pressure reading from the factory installed Schraeder valve Convert the pressure reading to a saturated temperature for the refrigerant Probe Locations Temperature b minus Temperature a 1s the superheat The valve should be adjusted so that the greatest difference between the two tempera tures is 3 F to 5 F Make adjustments of no more than 2 turn of the valve stem at a time and wait for at least 15 minutes before rechecking the probe tempera ture and making further adjustments P N 0515957 E U S amp Canada 1 800 922 1919 e Mexico 01 800 8
34. ry 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 0515957_E Plastic Shield Fluorescent Lamp 80 Remove Plastic Pins Attaching Display Lamp REPAIRING ALUMINUM COIL The aluminum coils used in Hussmann mer chandisers may be easily repaired in the field Materials are available from local refrigeration wholesalers NOTE Hussmann Aluminum melts at1125 F 607 C Aladdin 3 in 1 rod at 732 F 389 C X Ergon Acid core at 455 F 235 C Technique Locate Leak REMOVE ALL PRESSURE Brush area UNDER HEAT Use PRESTOLITE TORCH ONLY Number 6 tip 5 Maintain separate set of stainless steel brushes and USE ONLY ON ALUMINUM 6 Tin surface around area 7 Brush tinned surface UNDER HEAT thoroughly filling the open pores around leak 8 Repair leak Let aluminum melt solder NOT the torch 9 Don t repair for looks Go for thickness 10 Perform a leak check 11 Wash with water 12 Cover with a good flexible sealant Ir U S amp Canada 1 800 922 1919 e Mexico 01 800 890 2900 www hussmann com APPENDIX A TECHNICAL DATA A 1 Hussmann refrigerated merchandisers configured for sale for use in
35. tion 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 is running or the refrigeration valve 1s open e Defrost Cycle LED yellow Lights while the refrigeration coil is defrosting 9 Temperature or Sensor Alarm red Lights if the temperature is too warm or too cold Flashes if a sensor fails DDSS Open Vertical Merchandisers 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 e Senses the temperature of the refrigeration coil Terminates a defrost cycle when refrigeration coil ice melts Compressor or refrigeration relay e Switches on the compressor or refrigeration valve for cooling 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 Defrost Cycle 04 A y Temperature or Sensor Alarm P N 0515957 E START UP 1 Plug in the merchandiser WARN
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