Hoshizaki American, Inc. DCM-270BAH Service Manual
Reliability is a
beautiful thing
TM
CUBELET ICE DISPENSER
DCM-270BAH
SERVICE MANUAL
NUMBER:
ISSUED:
REVISED:
73100
APRIL 30, 2002
DEC. 15, 2003
IMPORTANT
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.
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.
HOSHIZAKI AMERICA, INC.
618 Highway 74 South
Peachtree City , GA 30269
Attn: HOSHIZAKI T echnical Support Department
Phone: 1-800-233-1940 T echnical Service
(770) 487-2331
Fax: (770) 487-3360
NOTE: T o expedite assistance, all correspondence/communication MUST include the following
information:
• Model Number
• Serial Number
•
Complete and detailed explanation of the problem
2
• 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. GENERAL INFORMATION ............................................................................................................. 5
1. CONSTRUCTION............................................................................................................... ....... 5
2. OPERATION - How it works ...................................................................................................... 6
III. TECHNICAL INFORMATION ......................................................................................................... 7
1. WATER CIRCUIT AND REFRIGERANT CIRCUIT....................................................................7
2. PERFORMANCE DATA ............................................................................................................8
3. WIRING DIAGRAM.................................................................................................................... 9
4. SEQUENCE OF ELECTRICAL CIRCUIT ................................................................................ 10
IV. SERVICE DIAGNOSIS ............................................................................................................... 21
1. NO ICE PRODUCTION ...........................................................................................................21
2. LOW ICE PRODUCTION......................................................................................................... 23
3. FAULTY DISPENSER ............................................................................................................. 24
4. OTHERS..................................................................................................................... ............. 25
V. REMOVAL AND REPLACEMENT OF COMPONENTS...............................................................26
1. SERVICE FOR REFRIGERANT LINES.................................................................................... 26
[a] REFRIGERANT RECOVERY............................................................................................ 26
[b] EVACUATION AND RECHARGE [R-404A] ...................................................................... 26
2. BRAZING.................................................................................................................................. 27
3. REMOVAL AND REPLACEMENT OF COMPRESSOR ........................................................... 28
4. REMOVAL AND REPLACEMENT OF DRIER .......................................................................... 29
5. REMOVAL AND REPLACEMENT OF THERMOSTATIC EXPANSION VALVE.......................3 0
6. REMOVAL AND REPLACEMENT OF PRESSURE SWITCH................................................... 31
7. REMOVAL AND REPLACEMENT OF CONTROL WATER VALVE ......................................... 32
8. REMOVAL AND REPLACEMENT OF FLUSH WATER VALVE .............................................. 33
9. REMOVAL AND REPLACEMENT OF FLOAT SWITCH........................................................... 34
10. REMOVAL AND REPLACEMENT OF BIN CONTROL SWITCH ASSEMBLY ......................... 35
11. REMOVAL AND REPLACEMENT OF STORAGE BIN ASSEMBLY ........................................ 36
12. REMOVAL AND REPLACEMENT AGITATOR AND DRIP RING............................................. 37
13. REMOVAL AND REPLACEMENT OF EVAPORATOR ASSEMBLY........................................ 38
VI. CLEANING AND MAINTENANCE INSTRUCTIONS................................................................... 41
1. PREPARING THE ICE DISPENSER FOR LONG STORAGE ................................................. 41
2. CLEANING INSTRUCTIONS................................................................................................... 42
[a] CLEANING PROCEDURE ................................................................................................ 42
[b] SANITIZING PROCEDURE .............................................................................................. 45
3. MAINTENANCE INSTRUCTIONS ........................................................................................... 46
3
I. SPECIFICATIONS
A
1. DCM-270BAH (Air-cooled)
AC SUPPLY VOLTAGE 115/60/1
AMPERAGE 8.5 A [AT 104°F(40 °C)/W T 80°F(27°C )]
MINIMUM CIRCUIT AMPACI TY 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 ( 1 18)
Referen ce without *mar ks 80 248 (11 3) 238 (108) 228 ( 1 03)
90 219 (99) *215 (98) 201 (91)
100 192 (87) 184 (8 4) *172 (78)
SHAPE OF ICE Cubelet (compressed flake ice)
ICE QUALITY Appro x. 90%, Ice (90/70°F, Conduc tivity 200 µs/cm)
APPROXIMATE STORAGE CAPACITY 8.8 lbs
ELECTRIC & W ATER 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, plasti c top
WEIGHT Net 152 lbs. ( 69 kg ), Shipping 17 0 lbs. ( 7 7 kg )
CONNECTIONS - ELECTRIC Cord Connection
- WATER SUPPLY Inlet 1/2" FPT
- DRAIN Outlet 3/4" MPT
ICE MAKING SYSTEM Auger type
HARVESTING SYSTEM Dir ect Dri ven Auger ( 80 W Gear Motor )
ICE MAKING WATER CONTROL Float Switch
COOLING WATER CONTROL N/A
BIN CONTROL SYSTEM Mechani cal Bi n Control ( micro switch )
COMPRESSOR Hermetic, Model ASE24C3E-IAA-252
CONDENSER Air-cooled, Fin and tube type
EVAPORATOR Copper Tube on Cylinder
REFRI GERANT CONTROL Thermostatic Expansion Valve
REFRIGERANT CHARGE R-404A 14.8 oz . (420g)
DESIGN PRESSURE Hi gh 427 PSIG, Low 230 PSIG
COMPRESSOR PROTECTION Auto-Reset Overload Protec tor
GEAR MOTOR PROTECTION Manual Reset Circ ui t Breaker
REFRI GERANT CIRCUIT PROTECTI ON
LOW WATER PROTECTION Float Switch and Timer
ACCESSORIES -SUPPLIED N/A
OPERATING CONDITIONS VOLTAGE RANGE 104-127 V
uto-reset High Pressure Control Switch
AMBIENT TEMP. 45-100° F
WATER SUPPLY TEMP. 45-90° F
WATER SUPPLY PRESSURE 10-113 PSI G
We reserve the right to make changes in specifications and design without prior notice.
4
II. GENERAL INFORMATION
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
5
2. OPERATION - How it works
Water 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. The Water Reservoir functions
to maintain a constant water level inside the Freezer Assembly. Water from the Water
Reservoir enters at the bottom of the Freezer. Heat is removed by the refrigeration process
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
from the Storage Bin, the Bin Control Switch resets automatically and restarts the icemaking
process.
The Agitator in the Storage Bin keeps the ice from clustering so that the ice can move easily
through the Spout.
Fig. 2
6
III. TECHNICAL INFORMA TION
1. W ATER CIRCUIT AND REFRIGERANT CIRCUIT
7
2. PERFORMANCE DA TA
DCM-270BAH (Air-cooled)
APPROXIMATE Ambient Water Temp. (F)
ICE PRODUCTION Temp. (F)
PER 2 4 HR. 70 282
80 248
90 219
lbs./DAY ( kg /day ) 100 192
APPROXIMATE ELECTRIC 70 641
CONSUMPTIO N 80 660
90 680
watt s 100 694
APPROXIMATE WATER 70 34
C ONSUMPTION PER 2 4 HR. 80 30
90 26
gal. / day (l/day) 100 23
EVAPORATOR OUTLET TEMP. 70 20
°F (°C) 80 20
90 23
100 24
HEAD PRESSURE 70 217
80 251
90 285
PSIG (kg/sq.cmG) 100 327
SUCTI ON PRES SURE 70 37
PSIG (kg/sq.cmG) 80 40
90 43
100 46
TOTAL HEAT OF REJEC TION 3532 BTU/h (A T 90°F /W T 70°F )
50 70 90
(128)
(113)
(99)
(87)
--
--
--
-(128)
(113)
(99)
(87)
(-7)
(-7)
(-5)
(-4)
(15.2)
(17.6)
(20.0)
(23.0)
(2.6)
(2.8)
(3.0)
(3.2)
271
238
215
184
647
667
686
697
32
29
26
22
20
23
23
24
217
251
285
327
37
40
43
46
(123)
(108)
(98)
(84)
--
--
--
-(123)
(108)
(98)
(84)
(-7)
(-5)
(-5)
(-4)
(15.2)
(17.6)
(20.0)
(23.0)
(2.6)
(2.8)
(3.0)
(3.2)
259
228
201
172
654
673
690
701
217
251
285
327
31
27
24
21
20
23
24
24
37
40
43
46
(118)
(103)
(91)
(78)
--
--
--
-(118)
(103)
(91)
(78)
(-7)
(-5)
(-4)
(-4)
(15.2)
(17.6)
(20.0)
(23.0)
(2.6)
(2.8)
(3.0)
(3.2)
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.
8
3. WIRING DIAGRAM
9
4. SEQUENCE OF ELECTRICAL CIRCUIT
10
A2AAA0269806
A2AAA0269806
11
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