Advertisement
Quick Links
Advertisement
Related Manuals for Scotsman MDT5N
Summary of Contents for Scotsman MDT5N
- Page 1 Ice Maker - Dispensers Technical Training...
- Page 2 Presentation Topics • Topic 1: Nugget Ice Maker Dispensers – MDT5N, MDT6N • Topic 2: Flaked Ice Maker Dispensers – MDT3F, MDT4F • Topic 3: Cubelet Ice Maker Dispenser – MDT2...
-
Page 3: Model Number Scheme
Model Number Scheme • Example: MDT5N40A-1J – MD = ice Maker Dispenser – T = Touch Free – 5 = the approximate ice making capacity, in hundreds of pounds – N = ice type; F for Flaked or N for Nugget or C for Cubelet –... - Page 4 MDT5N25 • MDT Nugget Dispenser – MDT5N40 taller...
- Page 5 MDT6N90 • Large Capacity Touch Free • Best for filling pitchers...
- Page 6 MDT5 and MDT6 • There are two dispensing stations – Ice – Water...
- Page 7 MDT5 • Dispensing – Place a container in front of the sensor & under the spout to dispense...
- Page 8 Touch Free • What is Touch-Free? – An "infrared triangulation" position control • Infrared beam goes out • No reflection, no action • Reflected infrared light triggers sensors & dispensing...
- Page 9 MDT5 • Behind the upper front panel – Control box – Reservoir – Ice storage bin...
- Page 10 MDT5 Control Box • Contactor • Compressor relay • Control Board – Operates all loads – Contains transformer – Operates the Touch-Free system...
- Page 11 Touch Free Control Board • Indicator Lights – Power – Bin Empty – Off Timer – No Water...
- Page 12 Touch Free Control Board • Power Light – On whenever there is power to the board • Bin Empty Light – On whenever the bin is NOT FULL...
- Page 13 Touch Free Control • OFF Timer Light – ON when unit shuts – Unit will not restart for 6 minutes...
- Page 14 Touch Free Control • No Water Light – ON when the water sensor is dry...
- Page 15 Touch Free • Water Level Sensor – Thermistor Type...
- Page 16 • The bin level control is an electric eye – Infrared Sender & Receiver • Light blocked by ice signals control to shut down • Compressor stops – Auger motor continues to operate for 2 min. – After shut down, restart will be delayed for: •...
- Page 17 MDT5 Storage Bin Cover Infrared Sensor Mounting Socket...
- Page 18 MDT5 • MDT5 – The photo- electric eyes are in the bin cover...
-
Page 19: Under The Cover
Under the Cover • Inside the ice storage bin – Ice delivery chute – Ice dispensing vane – Bin bottom... - Page 20 MDT, TDE & NDE Inner Bin Bottom Dispensing Vane Looking down at the inside of the bin.
- Page 21 Dispensing • The ice dispensing vane moves all the ice every time ice is dispensed. – Electro-polished stainless steel – Rests on plastic bushing • No thrust on drive motor • Pull up to remove...
- Page 22 MDT5 • Bin Bottom is Removable for Sanitizing View with vane removed.
- Page 23 MDT5 • View with Inner Bin Bottom removed.
- Page 24 MDT6 • The only model with a Solenoid Operated Dispensing Door...
- Page 25 MDT6 • Top View of Hopper...
- Page 26 • The reservoir contains – Float valve • Water flows out to the evaporator – Water level sensor • MDT, TDE - Thermistor – Overflow connection to the drain...
- Page 27 Ice Making Components • Same ice making section as modular nugget ice makers. – Stainless steel evaporator, ice extruder (breaker), and auger – Double row spherical, self- aligning top bearing...
-
Page 28: Auger Removal
Auger Removal • Begin at the top. – Push bail clip back and remove chute cover. – Unscrew ice sweep – Remove breaker cover – Left hand threads... - Page 29 MDT5 or MDT6 Ice Sweep Removed...
- Page 30 MDT5 or MDT6 • Check top bearing for proper lubrication Bearing Cover removed (left hand threads)
- Page 31 MDT5 or MDT6 • Remove chute. – Breaker is now visible – Hex head bolts hold breaker to evaporator – Remove cover, loosen auger stud – Remove the 4 bolts • Auger and breaker can be lifted out of evaporator...
- Page 32 MDT5 or MDT6 • Pull UP to remove Auger...
- Page 33 MDT5 or MDT6 • Auger Construction – Double-spiral – Segmented flight edges – Double flats in base for output shaft...
- Page 34 • Auger Water Seal – Face Type • Top half rotates with auger Top Half • Bottom half is stationary • Sealing occurs where the "faces" of the two seals meet Bottom Half...
- Page 35 MDT5 or MDT6 • Top Bearing Construction – Takes up thrust of ice making – Seated in stainless steel housing – Double row – Two seals below it – Cap and seal above it...
-
Page 36: Maintenance
Maintenance • Check top bearing • Sanitize – Water system/Evaporator – Ice storage bin • De-Scale with ice machine cleaner – Evaporator, Breaker & Auger • Clean air cooled condenser... - Page 37 Auger Service Scale on Auger...
- Page 38 • Touch Free Sensors – Attached to splash panel • Have foam cover – Replaced as a set – Can be switched off for cleaning of splash panel • Switch is between ice & water outlets...
- Page 39 MDT5 or MDT6 • Accessible Parts when splash panel removed: – Condensing unit – Access valves – Bin drive motor...
- Page 40 MDT5 • Dispense Drive Motor...
- Page 41 MDT5 or MDT6 • Refrigeration – All models use R-404A – Typical low side pressure: • 38 PSIG – Typical air cooled discharge pressure • 240 PSIG – Water cooled discharge pressure • 245 PSIG...
- Page 42 Update • New compressor late 2010 – MDT5 and MDT6 • New ice chute Nov 2010 – MDT5...
- Page 43 • Summary – MDT and prior TDE are Touch Free actuated – Prior models NDE554, NDE654 and NDE754 are lever actuated systems – All use electric eye bin control – All have stainless steel evaporator components – All make nugget ice...
- Page 44 Flake Ice Maker - Dispensers Topic 2: MDT3F12 MDT4F12...
- Page 45 MDT3F and MDT4F • Compact Flaker Dispenser • Touch Free Dispensing • Taller cabinet for easier dispensing • Quieter operation...
- Page 46 Models • MDT2, MDT3F and MDT4F • Use R-134a for a refrigerant – Have electric eye bin controls – Make and dispense ice, MDT2 makes cubelet ice, all others are flaked ice makers • MDT are Touch-Free...
- Page 47 Ice Dispensing...
- Page 48 MDT3 and MDT4 • MDT3F, MDT4F • Compact ice maker - dispensers – Designed to be counter-mounted • Cabinets have a sealing gasket at the base – A wall mount kit is available...
- Page 49 MDT3 and MDT4 • All use an electric eye bin control system • The "eyes" are in the bin cover...
- Page 50 Touch Free Control • Control Board – Controls Ice Making – Controls Ice Dispensing – Controls Water Dispensing...
- Page 51 MDT3 and MDT4 • Water control • Float valve – All contain water level sensor • MDT - Thermistor...
- Page 52 MDT3 and MDT4 • All use a R-134a compressor – It is a Tecumseh • Service access valves – Located at the top of the cabinet...
- Page 53 MDT3 and MDT4 • System Pressures - R-134a – Suction will be about • 11 - 13 PSIG – Discharge will be about • 120 - 135 PSIG...
- Page 54 Maintenance • Cleaning • Auger - must be clean and shiny • Evaporator - no build up of scale • Sanitizing – Water reservoir/Evaporator & Ice storage bin • Mechanical – Clean air cooled condenser – Check top bearing – Grease coupling...
- Page 55 Flaker Service Scale on inside of Evaporator.
- Page 56 Flaker Service...
- Page 57 Update • New top bearing design – Stainless steel thrust and alignment bearing – New water seal • Ceramic rotating half – Stainless steel bottom bearing – Auger kit developed – Production change in May 2010...
- Page 58 Cubelet Ice Maker - Dispenser Topic 3: MDT2C12...
- Page 59 MDT2C12 • Cubelet ice maker dispenser – Cubelet ice form – Portion Controlled Dispensing – Touch Free Operation – Air cooled only, air exhausts out the top...
- Page 60 Cubelet Ice...
-
Page 61: Operation
Operation • Electronic Board Controls Ice Making • Sensors – Ice Level - in bin – Water Level - in reservoir – Condenser Temp - in condenser • Controls fan operation – Evaporator Temp - on suction line – Auger Motor - on top of motor •... - Page 62 MDT2 Water Schematic OPTICAL ICE LEVEL CONTROL FLOAT VALVE WATER LEVEL...
- Page 63 MDT2 Controls • WATER LEVEL SENSOR • Conductivity Probes...
- Page 64 Ice Level Sensor Infrared Sensors Viewed from Below...
- Page 65 MDT2 Controls • EVAPORATOR SENSOR...
- Page 66 MDT2 Controls • CONDENSER SENSOR...
- Page 67 MDT2 Controls • MAGNETIC SENSOR...
-
Page 68: Water System
Water System • Water Reservoir – Float valve – Water level sensor... - Page 69 MDT2 Mechanical • Auger Coupling - slips when motor runs backwards...
- Page 70 MDT2 Bearings Bottom Bearing Top Bearing Thrust Washer Water Seal...
- Page 71 MDT2 Auger • Auger – Stainless steel – Shown attached to breaker...
- Page 72 MDT2 Breaker • Breaker – Ice extrudes through slots – Contains top bearing – Alignment bushing for auger Slots Bushing...
- Page 73 MDT2 Control Board • Six lights – Bin Empty – Start up or High Condenser Temp Alert – Auger Motor or High Evap Temp Alert – Power – No Water – Bin Full...
- Page 74 MDT2 Power Up Reset button Control Board Lights Bin empty Power 3 minute wait when Blinking...
- Page 75 MDT2 Normal Operation Reset button Control Board Lights Bin empty Power...
- Page 76 MDT2 Error Reset button Control Board Lights Bin empty Too high condenser temp when on steady Power...
- Page 77 MDT2 Error Reset button Control Board Lights Bin empty Auger motor not turning when on steady Hi evaporator temp when blinking Power...
- Page 78 MDT2 No Water Reset button Control Board Lights Bin empty No water Power...
- Page 79 MDT2 Bin Full Reset button Control Board Lights Bin empty Bin full Power...
- Page 80 Scotsman Ice Systems • Modular & Self Contained Cubers • Modular & Self Contained Flakers • Hotel Dispensers • Ice Storage Bins • Ice Maker Dispensers...