Hoshizaki DCM-270BAH User manual

Hoshizaki
“A Superior Degree
of Reliability”
www.hoshizaki.com
Models
DCM-270BAH
Cubelet Icemaker/Dispenser
Hoshizaki America, Inc.
Number: 73100
Issued: 4-30-2002
Revised: 12-15-2003
SERVICE MANUAL

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IMPORTANT
HOSHIZAKIAMERICA,INC.
618Highway74South
PeachtreeCity,GA 30269
Attn: HOSHIZAKITechnicalSupportDepartment
Phone: [phone]TechnicalService
[phone]
Fax: [phone]
NOTE: Toexpediteassistance,allcorrespondence/communicationMUST includethefollowing
information:
• ModelNumber
• SerialNumber
• Completeanddetailedexplanationoftheproblem
HOSHIZAKI provides this manual primarily to assist qualified service technicians in the
service and maintenance of the dispenser.
Should the reader have any questions or concerns which have not been satisfactorily
addressed, please call or write to the HOSHIZAKI Technical Support Department for
assistance.
Only qualified service technicians should attempt to service or maintain this ice
dispenser. No service or maintenance should be undertaken until the technician has
thoroughly read this service manual.

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• Please review this manual. It should be read carefully before the ice dispenser is
serviced or maintenance operations performed. Only qualified service technicians should
service and maintain the dispenser. This manual should be made available to the
technician prior to service or maintenance.
CONTENTS PAGE
I. SPECIFICATIONS........................................................................................................................... 4
1. DCM-270BAH(Air-cooled)......................................................................................................... 4
II.GENERALINFORMATION ............................................................................................................. 5
1. CONSTRUCTION...................................................................................................................... 5
2. OPERATION - How it works ...................................................................................................... 6
III.TECHNICALINFORMATION ......................................................................................................... 7
1. WATERCIRCUIT ANDREFRIGERANT CIRCUIT.................................................................... 7
2. PERFORMANCEDATA ............................................................................................................8
3. WIRING DIAGRAM.................................................................................................................... 9
4. SEQUENCE OF ELECTRICALCIRCUIT ................................................................................ 10
IV. SERVICEDIAGNOSIS ............................................................................................................... 21
1. NO ICE PRODUCTION ...........................................................................................................21
2. LOW ICE PRODUCTION......................................................................................................... 23
3. FAULTYDISPENSER ............................................................................................................. 24
4. OTHERS.................................................................................................................................. 25
V. REMOVALANDREPLACEMENT OF COMPONENTS ............................................................... 26
1.SERVICEFORREFRIGERANTLINES.................................................................................... 26
[a]REFRIGERANTRECOVERY............................................................................................ 26
[b]EVACUATIONANDRECHARGE[R-404A] ...................................................................... 26
2. BRAZING.................................................................................................................................. 27
3.REMOVALANDREPLACEMENTOFCOMPRESSOR ........................................................... 28
4. REMOVALAND REPLACEMENT OF DRIER .......................................................................... 29
5.REMOVALANDREPLACEMENTOFTHERMOSTATICEXPANSIONVALVE....................... 30
6.REMOVALANDREPLACEMENTOF PRESSURESWITCH................................................... 31
7.REMOVALAND REPLACEMENT OFCONTROL WATERVALVE ......................................... 32
8. REMOVAL AND REPLACEMENT OF FLUSH WATER VALVE .............................................. 33
9.REMOVALANDREPLACEMENT OF FLOATSWITCH........................................................... 34
10. REMOVALAND REPLACEMENTOF BIN CONTROLSWITCH ASSEMBLY ......................... 35
11. REMOVALAND REPLACEMENT OFSTORAGE BINASSEMBLY ........................................ 36
12. REMOVALAND REPLACEMENTAGITATOR ANDDRIP RING............................................. 37
13. REMOVALANDREPLACEMENTOFEVAPORATORASSEMBLY........................................ 38
VI. CLEANINGANDMAINTENANCEINSTRUCTIONS................................................................... 41
1. PREPARING THE ICE DISPENSER FOR LONG STORAGE ................................................. 41
2. CLEANINGINSTRUCTIONS................................................................................................... 42
[a]CLEANINGPROCEDURE ................................................................................................ 42
[b]SANITIZINGPROCEDURE .............................................................................................. 45
3. MAINTENANCEINSTRUCTIONS ........................................................................................... 46

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I.SPECIFICATIONS
1. DCM-270BAH (Air-cooled)
We reserve the right to make changes in specifications and design without prior notice.
AC SUPPLY VOLTAGE 115/60/1
AMPERAGE 8.5 A [AT 104°F(40°C)/WT 80°F(27°C)]
MINIMUM CIRCUIT AMPACITY N/A
MAXIMUM FUSE SIZE N/A
APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F)
PER 24 HR. Temp.(°F) 50 70 90
lbs./day ( kg/day ) 70 *282 (128) 271 (123) 259 (118)
Reference without *marks 80 248 (113) 238 (108) 228 (103)
90 219 (99) *215 (98) 201 (91)
100 192 (87) 184 (84) *172 (78)
SHAPE OF ICE Cubelet (compressed flake ice)
ICE QUALITY Approx. 90%, Ice (90/70°F, Conductivity 200 µs/cm)
APPROXIMATE STORAGE CAPACITY 8.8 lbs
ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F
ELECTRIC W (kWH/100 lbs.) 686 (7.6) 641 (5.5)
POTABLE WATER 25.6 (12) 32.8 (12)
gal./24HR(gal./100 lbs.)
EXTERIOR DIMENSIONS (WxDxH) 16-9/16" x 24-3/16" x 31-7/8" (420 x 615 x 809mm)
EXTERIOR FINISH Stainless Steel, plastic top
WEIGHT Net 152 lbs. ( 69 kg ), Shipping 170 lbs. ( 77 kg )
CONNECTIONS - ELECTRIC Cord Connection
- WATERSUPPLY Inlet 1/2" FPT
- DRAIN Outlet 3/4" MPT
ICE MAKING SYSTEM Auger type
HARVESTING SYSTEM Direct Driven Auger ( 80 W Gear Motor )
ICE MAKING WATER CONTROL Float Switch
COOLING WATER CONTROL N/A
BIN CONTROL SYSTEM Mechanical Bin Control ( micro switch )
COMPRESSOR Hermetic, Model ASE24C3E-IAA-252
CONDENSER Air-cooled, Fin and tube type
EVAPORATOR Copper Tube on Cylinder
REFRIGERANT CONTROL Thermostatic Expansion Valve
REFRIGERANT CHARGE R-404A 14.8 oz. (420g)
DESIGN PRESSURE High 427 PSIG, Low 230 PSIG
COMPRESSOR PROTECTION Auto-Reset Overload Protector
GEAR MOTOR PROTECTION Manual Reset Circuit Breaker
REFRIGERANT CIRCUIT PROTECTION
A
uto-reset High Pressure Control Switch
LOW WATER PROTECTION Float Switch and Timer
ACCESSORIES -SUPPLIED N/A
OPERATING CONDITIONS VOLTAGE RANGE 104-127 V
AMBIENT TEMP. 45-100° F
WATER SUPPLY TEMP. 45-90° F
WATER SUPPLY PRESSURE 10-113 PSIG

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II.GENERALINFORMATION
1. CONSTRUCTION
The Hoshizaki Cubelet Ice Dispenser, model DCM-270BAH includes Water Supply,
Freezer, Condensing, Storage, Dispensing and Control Assemblies.
Note: *Adjustable Legs
Minimum height - 4"
Maximum height - 5.3"
Do not adjust exceeding the above recommendation.
Fig. 1

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Fig. 2
2. OPERATION - How it works
Water flows from the potable water source through the Water Supply Line Shut-off Valve,
entersattheWaterInletfittingandintotheWaterReservoir. TheWaterReservoirfunctions
to maintain a constant water level inside the Freezer Assembly. Water from the Water
ReservoirentersatthebottomoftheFreezer. Heatisremovedbytherefrigerationprocess
and ice forms inside the Freezer.
A stainless steel Auger, located inside the Freezer, is direct-driven by the Gear Motor, and
the rotating Auger carries the ice upward to the end of the Auger, where excess water is
pressed out of the ice, as the ice is extruded and broken into cubelet ice (compressed ice)
and then pushed out into the Storage Bin.
Moving the Power Switch on the bottom left of the Middle Front Panel, to the “ON” position
starts the automatic and continuous icemaking process. When the Ice Storage Bin is filled
with ice, the Bin Control Switch will shut off the icemaking process. As the ice is removed
fromtheStorageBin,theBinControlSwitchresetsautomaticallyandrestartstheicemaking
process.
TheAgitatorintheStorageBinkeepstheicefromclusteringsothattheicecanmoveeasily
through the Spout.

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III.TECHNICALINFORMATION
1. WATER CIRCUIT AND REFRIGERANT CIRCUIT

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2. PERFORMANCE DATA
DCM-270BAH (Air-cooled)
Note: Pressure data is recorded first 5 minutes in freezing cycle. The data without *marks should be used
for reference.
We reserve the right to make changes in specifications and design without prior notice.
APPROXIMATE Ambient Water Temp. (F)
ICE PRODUCTION Temp. (F)
PER 24 HR. 70 282 (128) 271 (123) 259 (118)
80 248 (113) 238 (108) 228 (103)
90 219 (99) 215 (98) 201 (91)
lbs./DAY ( kg/day) 100 192 (87) 184 (84) 172 (78)
APPROXIMATE ELECTRIC 70 641 -- 647 -- 654 --
CONSUMPTION 80 660 -- 667 -- 673 --
90 680 -- 686 -- 690 --
watts 100 694 -- 697 -- 701 --
APPROXIMATE WATER 70 34 (128) 32 (123) 31 (118)
CONSUMPTION PER 24 HR. 80 30 (113) 29 (108) 27 (103)
90 26 (99) 26 (98) 24 (91)
gal. / day (l/day) 100 23 (87) 22 (84) 21 (78)
EVAPORATOR OUTLET TEMP. 70 20 (-7) 20 (-7) 20 (-7)
°F (°C) 80 20 (-7) 23 (-5) 23 (-5)
90 23 (-5) 23 (-5) 24 (-4)
100 24 (-4) 24 (-4) 24 (-4)
HEAD PRESSURE 70 217 (15.2) 217 (15.2) 217 (15.2)
80 251 (17.6) 251 (17.6) 251 (17.6)
90 285 (20.0) 285 (20.0) 285 (20.0)
PSIG (kg/sq.cmG) 100 327 (23.0) 327 (23.0) 327 (23.0)
SUCTION PRESSURE 70 37 (2.6) 37 (2.6) 37 (2.6)
PSIG(kg/sq.cmG) 80 40 (2.8) 40 (2.8) 40 (2.8)
90 43 (3.0) 43 (3.0) 43 (3.0)
100 46 (3.2) 46 (3.2) 46 (3.2)
TOTAL HEAT OF REJECTION 3532 BTU/h (AT 90°F /WT 70°F)
50 70 90

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3. WIRINGDIAGRAM

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4. SEQUENCE OF ELECTRICAL CIRCUIT
A2AAA0269806

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A2AAA0269806

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