DCM-270BAH-OS Service Manual - HOSHIZAKI

1 HOSHIZAKI A Superior Degree of Reliability Models DCM-270 BAH(-OS)Cubelet Icemaker/Dispenser HOSHIZAKI America, Inc. Number: 73110 Issued: 2-10-2004 Revised: 5-26-2005 Service Manual 2 IMPORTANTOnly qualified Service technicians should attempt to Service or maintain this icedispenser. No Service or maintenance should be undertaken until the technicianhas thoroughly read this Service provides this Manual primarily to assist qualified Service technicians in theservice and maintenance of the the reader have any questions or concerns which have not been satisfactorilyaddressed.

2 Please call or write to the HOSHIZAKI Technical Support Department provides this Manual primarily to assist qualified Service technicians in theservice and maintenance of the the reader have any questions or concerns which have not been satisfactorily ad-dressed, please call or write to the HOSHIZAKI Technical Support Department AMERICA, Highway 74 SouthPeachtree City, GA 30269 Attn: HOSHIZAKI Technical Support DepartmentPhone: 1-800-233-1940 Technical Service (770) 487-2331 Fax:(770) 487-3360 Web Site: :To expedite assistance, all correspondence/communication MUST include thefollowing information: Model Number Serial Number Complete and detailed explanation of the problem3 Please review this Manual .

3 It should be read carefully before the ice dispenser is servicedor maintenance operations performed. Only qualified Service technicians should serviceand maintain the dispenser. This Manual should be made available to the technician prior toservice or 41. DCM-270 BAH-OS (air-cooled).. 4II. General Information .. 51. - How it works .. 6 III. Technical Information .. 71. Water Circuit and Refrigerant Circuit .. 72. Performance Data .. 8[a] DCM-270 BAH-OS (air-cooled).. 83. Wiring Diagram .. 94. Sequence of Electrical Circuit.

4 10IV. Service Diagnosis ..201. No Ice 202. Low Ice 223. Faulty Dispenser .. 23[a] Optical Sensor Description .. 234. 25V. Removal and Replacement of 261. Service for Refrigerant Lines .. 26[a] Refrigerant 26[b] Evacuation and Recharge [R-404A] .. 262. 273. Removal and Replacement of Compressor .. 284. Removal and Replacement of Drier .. 295. Removal and Replacement of Thermostatic Expansion Valve .. 306. Removal and Replacement of Pressure 317. Removal and Replacement of Control Water Valve.

5 328. Removal and Replacement of Flush Water Valve .. 339. Removal and Replacement of Float Switch .. 3410. Removal and Replacement of Bin Control Switch 3511. Removal and Replacement of Storage Bin 3612. Removal and Replacement of Agitator and Drip Ring .. 3713. Removal and Replacement of Evaporator 38VI. Cleaning and Maintenance 411. Preparing the Ice Dispenser for Long 412. Cleaning 42[a] Cleaning 42[b] Sanitizing 452. Maintenance 464I. Specifications1. DCM-270 BAH-OS (air-cooled)We reserve the right to make changes in specifications and design without prior SUPPLY VOLTAGE115/60/1 A [AT 104 F(40 C)/WT 80 F(27 C)]MAXIMUM FUSE SIZEN/AMINIMUM CIRCUIT AMPACITYN/AAPPROXIMATE ICE PRODUCTIONA mbientPER 24 ( F) ( kg/day )70* 288 (131)276 (125)265 (120) Reference without *marks80254 (115)243 (110)233 (106)90224 (101) * 220 (100)205 (93)100197 (89)189 (86) * 176 (80)SHAPE OF ICEC ubelet (Compressed Flake Ice)

6 ICE QUALITYA pprox. 90%, Ice (90/70 F, Conductivity 200 s/cm)APPROXIMATE STORAGE & WATER CONSUMPTION90/70 F70/50 F ELECTRIC W (kWH/100 lbs.)669 ( )638 ( ) POTABLE WATER26 (12)35 (12) ( lbs.)EXTERIOR DIMENSIONS (WxDxH)16-9/16" x 24-1/8" x 31-11/16" (420 x 613 x 805mm)EXTERIOR FINISHS tainless SteelWEIGHTNet 152 lbs. ( 69 kg ), Shipping 170 lbs. ( 77kg )CONNECTIONS - ELECTRICCord Connection - WATER SUPPLYI nlet 1/2" FPT - DRAINO utlet 3/4" FPTICE MAKING SYSTEMA uger typeHARVESTING SYSTEMD irect Driven Auger ( 80W Gear Motor )ICE MAKING W ATER CONTROLF loat SwitchCOOLING W ATER CONTROLN/ADISPENSER CONTROL SYSTEMP hotoelectric Sensor (Infrared)BIN CONTROL SYSTEMM echanical Bin Control ( Proximity Sw.)

7 COMPRESSORH ermetic, Model ASE24C3 ECONDENSERAir-cooled, Fin and Tube TypeEVAPORATORC opper Tube on CylinderREFRIGERANT CONTROLT hermostatic Expansion ValveREFRIGERANT CHARGER-404A,(420 g)DESIGN PRESSUREHigh 460 PSIG, Low 290 PSIGCOMPRESSOR PROTECTIONAuto-reset Overload ProtectorGEAR MOTOR PROTECTIONM anual reset Circuit Breaker REFRIGERANT CIRCUIT PROTECTIONAuto-reset High Pressure Control SwitchLOW W A TE R P ROTE CTIONFl oat S wit c h and Ti m erACCESSORIES - SUPPLIEDN/AOPERATING CONDITIONSVOLTAGE RANGE 104 - 127 VAMBIENT TEMP.

8 45 - 100 FWATER SUPPLY TEMP. 45 - 90 FWATER SUPPLY PRESSURE 10 - 113 PSIG50 WATER TEMP. ( F) General Information1. ConstructionThe HOSHIZAKI Cubelet Ice Dispenser, model DCM-270 BAH-OS includes water supply,freezer, condensing, storage, dispensing and control : *Adjustable LegsMinimum height - 4"Maximum height - "Do not adjust exceeding the above 16 Fig. - How it worksWater flows from the potable water source through the water supply line shut-off valve,enters at the water inlet fitting and into the water reservoir.

9 The water reservoir functions tomaintain a constant water level inside the freezer assembly. Water from the water reservoirenters at the bottom of the freezer. Heat is removed by the refrigeration process and ice formsinside the stainless steel auger, located inside the freezer, is direct-driven by the gear motor, and therotating auger carries the ice upward to the end of the auger, where excess water is pressedout of the ice, as the ice is extruded and broken into cubelet ice (compressed ice) and thenpushed out into the storage the power switch on the bottom left of the middle front panel, to the ON positionstarts the automatic and continuous icemaking process.

10 When the ice storage bin is filledwith ice, the bin control switch will shut off the icemaking process. As the ice is removed fromthe storage bin, the bin control switch resets automatically and restarts the agitator in the storage bin keeps the ice from clustering so that the ice can move easilythrough the Technical Information1. Water Circuit and Refrigerant Circuit82. Performance Data[a] DCM-270 BAH-OS (air-cooled)Note: Pressure data is recorded first 5 minutes in freezing cycle. The data without*marks should be used for reserve the right to make changes in specifications and design without prior Wiring Diagram104.