Hoshizaki America KM-1900SAH Service Manual

Hoshizaki America, Inc.

Hoshizaki

Stackable Crescent Cuber

Models KM-1900SAH/3

“A Superior Degree

of Reliability”

www.hoshizaki.com

KM-1900SWH/3 KM-1900SRH/3

SERVICE MANUAL

™

Number: 73171 Issued: 2-9-2009 Revised: 2-25-2009

IMPORTANT

Only qualied service technicians should attempt to install, service, or maintain this icemaker. No service or maintenance should be undertaken until the technician has thoroughly read this Service Manual. Failure to service and maintain the equipment in accordance with this manual may adversely affect safety, performance, and warranty coverage.

Hoshizaki provides this manual primarily to assist qualied service technicians in the service and maintenance of the icemaker.

Should the reader have any questions or concerns which have not been satisfactorily addressed, please call, write, or send an e-mail message to the Hoshizaki Technical Support Department for assistance.

HOSHIZAKI AMERICA, INC. 618 Highway 74 South Peachtree City, GA 3069

Attn: Hoshizaki Technical Support Department

Phone: 1-800-33-1940 Technical Support (770) 487-331 Fax: 1-800-843-1056 (770) 487-3360 E-mail: techsupport@hoshizaki.com

Web Site: www.hoshizaki.com

NOTE: To expedite assistance, all correspondence/communication MUST include the following information:

• Model Number

• Serial Number

• Complete and detailed explanation of the problem.



IMPORTANT

This manual should be read carefully before the icemaker is serviced or maintenance operations are performed. Only qualied service technicians should install, service, and maintain the icemaker. Read the warnings contained in this booklet carefully as they give important information regarding safety. Please retain this booklet for any further reference that may be necessary.

CONTENTS

I. Specications ..................................................................................................................... 6

A. Icemaker ....................................................................................................................... 6

1. KM-1900SAH (air-cooled) ....................................................................................... 6

. KM-1900SAH3 (air-cooled) ..................................................................................... 7

3. KM-1900SWH (water-cooled) ................................................................................ 8

4. KM-1900SWH3 (water-cooled) ............................................................................... 9

5. KM-1900SRH (remote air-cooled) ......................................................................... 10

6. KM-1900SRH3 (remote air-cooled) ....................................................................... 11

B. Condenser Unit ........................................................................................................... 1

1. URC-1F ............................................................................................................... 1

II. General Information ......................................................................................................... 14

A. Construction ................................................................................................................ 14

1. KM-1900SAH, KM-1900SAH3 (air-cooled) ........................................................... 14

. KM-1900SWH, KM-1900SWH3 (water-cooled) .................................................... 15

3. KM-1900SRH, KM-1900SRH3 (remote air-cooled) ............................................... 16

B. Sequence of Operation ............................................................................................... 17

1. One Minute Fill Cycle ............................................................................................ 17

. Initial Harvest Cycle .............................................................................................. 17

3. Freeze Cycle ........................................................................................................ 17

4. Pump-Out Cycle ................................................................................................... 17

5. Normal Harvest Cycle .......................................................................................... 18

6. Sequence Flow Chart ............................................................................................ 19

C. Control Board ............................................................................................................. 0

1. Control Board Layout ............................................................................................ 1

. Features ................................................................................................................ 

a) Maximum Water Supply Period - 6 minutes ....................................................... 

b) Harvest Backup Timer and Freeze Timer .......................................................... 

c) High Temperature Safety ................................................................................... 

d) Low Water Safety ............................................................................................... 

e) High Voltage and Low Voltage Cut-outs ............................................................ 

f) LED Lights and Audible Alarm Safeties .............................................................. 3

3. Controls and Adjustments ..................................................................................... 4

a) Default Dip Switch Settings ................................................................................ 4

b) Harvest Timer (S4 dip switch 1 & ) ................................................................... 4

c) Pump-Out Timer (S4 dip switch 3 & 4) ............................................................... 5

d) Pump-Out Frequency Control (S4 dip switch 5 & 6) .......................................... 5

e) Factory Use (S4 dip switch 7 & 8) ...................................................................... 5

f) Freeze Timer (S4 dip switch 9 & 10) ................................................................... 6

4. Control Board Check Procedure ........................................................................... 6

5. Control Board Replacement ................................................................................ 7

D. Harvest Control – Thermistor...................................................................................... 7

1. Thermistor Check Procedure ................................................................................ 7

E. Float Switch ................................................................................................................ 7

1. Float Switch Check Procedure .............................................................................. 7

. Float Switch Cleaning ............................................................................................ 8

F. Bin Control .................................................................................................................. 9

III. Technical Information ..................................................................................................... 30

A. Water Circuit and Refrigeration Circuit ....................................................................... 30

1. KM-1900SAH, KM-1900SAH3 (air-cooled) ........................................................... 30

. KM-1900SWH, KM-1900SWH3 (water-cooled) .................................................... 31

3. KM-1900SRH, KM-1900SRH3 (remote air-cooled) ............................................... 3

B. Wiring Diagrams ......................................................................................................... 33

1. KM-1900SAH (air-cooled) ..................................................................................... 33

. KM-1900SAH3 (air-cooled) .................................................................................. 34

3. KM-1900SWH (water-cooled), KM-1900SRH (remote air-cooled) ....................... 35

4. KM-1900SWH3 (water-cooled), KM-1900SRH3 (remote air-cooled) ................... 36

C. Performance Data ...................................................................................................... 37

1. KM-1900SAH (air-cooled) ..................................................................................... 37

. KM-1900SAH3 (air-cooled) ................................................................................... 38

3. KM-1900SWH (water-cooled) .............................................................................. 39

4. KM-1900SWH3 (water-cooled) ............................................................................ 40

5. KM-1900SRH (remote air-cooled) ........................................................................ 41

6. KM-1900SRH3 (remote air-cooled) ....................................................................... 4

IV. Service Diagnosis .......................................................................................................... 43

A. 10-Minute KM Diagnostic Procedure ......................................................................... 43

B. Diagnostic Charts ....................................................................................................... 45

1. No Ice Production .................................................................................................. 45

. Evaporator is Frozen Up ....................................................................................... 48

3. Low Ice Production ................................................................................................ 50

4. Abnormal Ice ......................................................................................................... 51

5. Other ..................................................................................................................... 5

V. Removal and Replacement of Components ................................................................... 53

A. Service for Refrigerant Lines ...................................................................................... 53

1. Refrigerant Recovery ............................................................................................ 53

. Brazing .................................................................................................................. 53

3. Evacuation and Recharge (R-404A) ..................................................................... 54

B. Removal and Replacement of Compressor ................................................................ 55

C. Removal and Replacement of Expansion Valve......................................................... 56

D. Removal and Replacement of Hot Gas Valve or Liquid Line Valve............................ 57

E. Removal and Replacement of Evaporator .................................................................. 58

F. Removal and Replacement of Condenser - Air-Cooled Models ................................. 58

G. Removal and Replacement of Condenser - Water-Cooled Models............................ 59

H. Removal and Replacement of Condenser - Remote Air-Cooled Models ................... 60

I. Removal and Replacement of Water Regulating Valve - Water-Cooled Models ......... 61

J. Adjustment of Water Regulating Valve - Water-Cooled Models ................................. 6

K. Removal and Replacement of Headmaster (Condensing Pressure Regulator - C.P.R.)

- Remote Air-Cooled Models .................................................................................... 6

L. Removal and Replacement of Thermistor ................................................................... 63

M. Removal and Replacement of Fan Motor - Air-Cooled and Remote Air-Cooled

Models .....................................................................................................................64

N. Removal and Replacement of Inlet Water Valve ........................................................ 64

O. Removal and Replacement of Pump Motor................................................................ 65

VI. Cleaning and Maintenance ............................................................................................ 66

A. Cleaning and Sanitizing Instructions ........................................................................... 66

1. Cleaning Procedure ............................................................................................... 67

. Sanitizing Procedure - Following Cleaning Procedure .......................................... 68

B. Maintenance Instructions ............................................................................................ 69

C. Preparing the Icemaker for Long Storage .................................................................. 69

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral 115V) AMPERAGE 14.4 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1867 (847) 1777 (806) 1638 (743) Reference without *marks 80 1798 (816) 1659 (752) 1511 (685)

90 1777 (806) *1560 (708) 1413 (641)

100 1744 (791) 1526 (692) 1278 (580)

SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 45.3 lbs. (20.5 kg) 2160pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2670(4.1) 2480(3.2) WATER gal./24HR (gal./100 lbs.) 293(18.8) 579(31.0) CEC/CEE TIER LEVEL 3 ENERGY STAR YES EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 36-7/16" (1219 x 695 x 925 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 390 lbs. (177 kg), Shipping 415 lbs. (188 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT 3/8" OD Tube

CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS16K6E-PFV-237 CONDENSER Air-Cooled , Fin and tube type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A, 4 lb. 10.1 oz. (2100g) DESIGN PRESSURE High 467PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin

OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

I. Specications

A. Icemaker

1. KM-1900SAH (air-cooled)

Note: We reserve the right to make changes in specications and design without prior

notice.

2. KM-1900SAH3 (air-cooled)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 8.59 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1859 (843) 1763 (800) 1633 (741) Reference without *marks 80 1786 (810) 1636 (742) 1507 (684)

90 1763 (800) *1530 (694) 1398 (634)

100 1738 (788) 1499 (680) 1277 (579)

SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 45.5 lbs. (20.6 kg) 2160pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2610(4.1) 2510(3.2) WATER gal./24HR (gal./100 lbs.) 260(17.0) 548(29.5) CEC/CEE TIER LEVEL 3 ENERGY STAR YES EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 36-7/16" (1219 x 695 x 925 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 390 lbs. (177 kg), Shipping 415 lbs. (188 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT 3/8" OD Tube

CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS16K6E-TF5-237 CONDENSER Air-Cooled , Fin and tube type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A, 4 lb. 10.1 oz. (2100g) DESIGN PRESSURE High 467PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin

OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

3. KM-1900SWH (water-cooled)

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral 115V) AMPERAGE 12.5 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1876 (851) 1868 (847) 1734 (787) Reference without *marks 80 1870 (848) 1858 (843) 1655 (751)

90 1868 (847) *1850 (839) 1673 (759)

100 1800 (816) 1809 (820) 1511 (685)

SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 47 lbs. (21.3 kg) 2160pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2390(3.1) 2330(3.0) POTABLE WATER gal./24HR (gal./100 lbs.) 348(18.8) 628(33.5) WATER COOLED CONDENSER 1832(99) 1022(55)

gal./24HR (gal./100 lbs.) CEC/CEE TIER LEVEL 3 ENERGY STAR N/A EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 36-7/16" (1219 x 695 x 925 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 390 lbs. (177 kg), Shipping 415 lbs. (188 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT Condenser Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT Condenser Outlet 1/2" FPT

3/8" OD Tube CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS16K6E-PFV-237 CONDENSER Water Cooled, Tube in Tube Type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A, 3 lb. 1.4 oz. (1400g) DESIGN PRESSURE High 427PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

4. KM-1900SWH3 (water-cooled)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 8.4 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1825 (828) 1822 (826) 1693 (768) Reference without *marks 80 1823 (827) 1818 (824) 1619 (734)

90 1822 (826) *1814 (823) 1642 (745)

100 1754 (796) 1774 (805) 1484 (673)

SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 45.4 lbs. (20.6 kg) 2160pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2490(3.3) 2410(3.2) POTABLE WATER gal./24HR (gal./100 lbs

341(18.8) 584(32.0)

WATER COOLED CONDENSER 1796(99) 982(54)

- WATER SUPPLY Inlet 1/2" FPT Condenser Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT Condenser Outlet 1/2" FPT

3/8" OD Tube CUBE CONTROL SYSTEM Float Switch HARVESTING CONTROL SYSTEM Hot Gas and Water, Thermistor and Timer ICE MAKING WATER CONTROL Timer Controlled. Overflow Pipe COOLING WATER CONTROL N/A BIN CONTROL SYSTEM Thermostat COMPRESSOR Hermetic, Model CS16K6E-TF5-237 CONDENSER Water Cooled, Tube in Tube Type EVAPORATOR Vertical type, Stainless Steel and Copper REFRIGERANT CONTROL Thermostatic Expansion Valve REFRIGERANT CHARGE R404A, 3 lb. 1.4 oz. (1400g) DESIGN PRESSURE High 427PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

5. KM-1900SRH (remote air-cooled)

AC SUPPLY VOLTAGE 208-230/60/1 (3 wire with neutral 115V) AMPERAGE 14.9 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 30 A MAXIMUM FUSE SIZE 30 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1915 (869) 1827 (829) 1676 (760) Reference without *marks 80 1848 (838) 1712 (777) 1543 (700)

90 1827 (829) *1616 (733) 1451 (658)

100 1786 (810) 1577 (715) 1299 (589)

SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 46.3 lbs. (21 kg) 2160pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2630(3.9) 2460(3.1) WATER gal./24HR (gal./100 lbs.) 323(20.0) 585(30.5) CEC/CEE TIER LEVEL 3 ENERGY STAR YES EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 36-7/16" (1219 x 695 x 925 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 390 lbs. (177 kg), Shipping 415 lbs. (188 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-21F (190 PSI)

REFRIGERANT CHARGE R404A, 23 lb. 7.7 oz. (10650g)

(Icemaker 13 lbs. 12.5 oz. Cond. Unit 9 lbs. 11.2 oz.) DESIGN PRESSURE High 467PSIG, Low 230PSIG P.C. BOARD CIRCUIT PROTECTION High Voltage Cut-out ( Internal ) COMPRESSOR PROTECTION Auto-reset Overload Protector ( Internal ) REFRIGERANT CIRCUIT PROTECTION Auto-reset High Pressure Control Switch LOW WATER PROTECTION Float Switch ACCESSORIES -SUPPLIED N/A

-REQUIRED Ice Storage Bin, Remote Condenser Unit OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F

WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

6. KM-1900SRH3 (remote air-cooled)

AC SUPPLY VOLTAGE 208-230/60/3 AMPERAGE 11.0 A ( 5 Min. Freeze AT 104°F / WT 80°F) MINIMUM CIRCUIT AMPACITY 20 A MAXIMUM FUSE SIZE 20 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *1965 (891) 1771 (804) 1846 (838) Reference without *marks 80 1817 (824) 1516 (688) 1781 (808)

90 1771 (804) *1304 (591) 1490 (676)

100 1901 (862) 1347 (611) 1660 (753)

SHAPE OF ICE Crescent Cube ICE PRODUCTION PER CYCLE 46.5 lbs. (21.1 kg) 2160pcs. APPROXIMATE STORAGE CAPACITY N/A ELECTRIC & WATER CONSUMPTION 90/70°F 70/50°F ELECTRIC W (kWH/100 lbs.) 2230(4.1) 2680(3.3) WATER gal./24HR (gal./100 lbs.) 261(20.0) 590(30.0) CEC/CEE TIER LEVEL 3 ENERGY STAR YES EXTERIOR DIMENSIONS (WxDxH) 48" x 27-3/8" x 36-7/16" (1219 x 695 x 925 mm) EXTERIOR FINISH Stainless Steel, Galvanized Steel (Rear) WEIGHT Net 390 lbs. (177 kg), Shipping 415 lbs. (188 kg) CONNECTIONS - ELECTRIC Permanent - Connection

- WATER SUPPLY Inlet 1/2" FPT

- DRAIN Outlet 3/4" FPT

Condensing Pressure Regulator on URC-21F (190 PSI)

REFRIGERANT CHARGE R404A, 23 lb. 7.7 oz. (10650g)

-REQUIRED Ice Storage Bin, Remote Condenser Unit OPERATING CONDITIONS VOLTAGE RANGE 187 - 253 V

AMBIENT TEMP. 45 -100° F

WATER SUPPLY TEMP. 45 - 90° F

WATER SUPPLY PRESSURE 10 - 113 PSIG

Note: We reserve the right to make changes in specications and design without prior

notice.

B. Condenser Unit

1. URC-21F

Unit: mm (in.)

1

SPECIFICATIONS

AC SUPPLY VOLTAGE 115/60/1 (Connection to Icemaker)

FAN MOTOR 115 V Total 2.6FLA 130W

EXTERIOR DIMENSIONS (WxDxH) 46-3/8" x 15-11/16" x 25-15/16" (1178 x 398 x 659 mm)

DIMENSIONS INCLUDING LEGS (WxDxH) 48-7/16" x 18-1/8" x 40-7/8" (1230 x 460 x 1039 mm)

EXTERIOR FINISH Galvanized Steel

WEIGHT Net 158 lbs. ( 72 kg ) Shipping 169 lbs. ( 77 kg )

CONNECTIONS - ELECTRIC Permanent - Connection

- REFRIGERANT Discharge Line 1-1/16"-12 UNF Fitting (#10 AEROQUIP)

Liquid Line 5/8"-18 UNF Fitting (#6 AEROQUIP)

CONDENSER Air-cooled, Fin and tube type

FAN MOTOR PROTECTION Thermal Protection

REFRIGERANT CONTROL Condensing Pressure Regulator

REFRIGERANT CHARGE R-404A 9 lb. 11oz. (4400g)

DESIGN PRESSURE High 467 PSIG 32.2 Bar

OPERATING CONDITIONS VOLTAGE RANGE 104 ~ 127 V

AMBIENT TEMP. -20 ~ 122 °F

ACCESSORIES -SUPPLIED Leg 2 pcs

Hex. Head Bolt w/Washer 8 x 16 8 pcs

Hex. Nut 8 8 pcs

MODEL: URC-1F

II. General Information

A. Construction

1. KM-1900SAH, KM-1900SAH3 (air-cooled)

Separators

Spray Tubes

Low-Side Service Valve

High-Side Service Valve

Evaporator Assembly

Cleaning Valve

Check Valve (water)

Water Pump

Float Switch

Inlet Water Valve

Expansion Valves

Water Supply Inlet

Junction Box

Hot Gas Valve

Check Valves

Condenser

Control Box

Fan Blade

Compressor

Bin Control Thermostat

Control Switch

Capacitor Box (KM-1900SAH)

Fan Motor

Drier

Liquid Line Valve

Transformer Box (KM-1900SAH3)

2. KM-1900SWH, KM-1900SWH3 (water-cooled)

Separators

Spray Tubes

Inlet Water Valve

Evaporator Assembly

Low-Side Service Valve

High-Side Service Valve

Expansion Valves

Water Supply Inlet

Junction Box

Hot Gas Valve

Cleaning Valve

Check Valve (water)

Water Pump

Float Switch

Compressor

Bin Control Thermostat

Control Switch

Capacitor Box (KM-1900SWH)

Check Valves

Condenser

Water Regulating Valve

Drier

Control Box

Liquid Line Valve

Transformer Box (KM-1900SWH3)

3. KM-1900SRH, KM-1900SRH3 (remote air-cooled)

Separators

Spray Tubes

Inlet Water Valve

Evaporator Assembly

Low-Side Service Valve

High-Side Service Valve

High-Side Liquid Service Valve

Water Supply Inlet

Hot Gas Valve

Junction Boxes

Check Valves

Cleaning Valve

Check Valve (water)

Water Pump

Bin Control Thermostat

Float Switch

Compressor

Control Switch

Capacitor Box (KM-1900SRH)

Expansion Valves

Control Box

Receiver Tank

Drier

Liquid Line Valve

Transformer Box (KM-1900SRH3)

B. Sequence of Operation

The steps in the sequence are as outlined below. When power is supplied, the red "POWER OK" LED on the control board comes on. A 5-second delay occurs at startup. Note that the order of the LEDs from the outer edge of the board is 1, 4, 3, .

1. One Minute Fill Cycle

LED 4 is on. WV opens and the ll period begins. After 1 minute, the control board checks for a closed F/S. If F/S is closed, the harvest cycle begins. If not, WV will remain energized through additional 1 minute cycles until water enters the sump and F/S closes. This serves as a low water safety to protect the PM.

2. Initial Harvest Cycle

LEDs 1, 4, and  are on. WV remains open, Comp, FMR, and HGV opens. The control board monitors the warming of the evaporator via the thermistor located on the suction line. When the thermistor reaches 48°F (9°C), the control board reads a 3.9 kΩ signal from the thermistor and turns harvest termination over to the adjustable harvest timer (S4 dip switch 1 & ) which is factory set for normal conditions. The harvest timer has settings of 60, 90, 10, and 180 seconds. For details, see "II.C.3.b) Harvest Timer (S4 dip switch 1 & )." When the harvest timer completes its countdown, the harvest cycle is complete and the freeze cycle starts. The minimum total time allowed by the control board for a complete harvest cycle is  minutes. WV is energized during harvest for a maximum of 6 minutes or the length of harvest, whichever is shorter. At the end of harvest, the control board checks the position of F/S and proceeds to the freeze cycle if it is closed or calls for a 1-minute ll if it is open.

3. Freeze Cycle

LED 1 is on. Comp and FMR continue to run, PM and FMS energize, and LLV opens, HGV and WV close and the freeze cycle starts. For the rst 5 minutes the control board will not accept a signal from F/S. This 5 minute minimum freeze acts as a short cycle protection. At the end of 5 minutes, F/S assumes control. As ice builds on the evaporator the water level in the sump lowers. The freeze continues until F/S opens and terminates ice production.

4. Pump-Out Cycle

LEDs 1, 3, and  are on. Comp and FMR continue to run, HGV opens, LLV closes, and FMS de-energizes. PM stops for  seconds. The pump motor then re-starts in the reverse direction, taking water from the bottom of the sump and forcing pressure against the check valve seat allowing water to go through the check valve and down the drain. At the same time, water ows through the small tube to power ush the F/S. When the pump-out timer (S4 dip switch 3 & 4) stops counting, the pump out is complete. The 1st pump out occurs after the 1st freeze cycle and every 10th cycle thereafter. The pump-out frequency control (S4 dip switch 5 & 6) is factory-adjusted to drain the water tank every 10 cycles, and no adjustment is required. However, where water quality is bad and the icemaker needs a pump out more often, the pump-out frequency can be adjusted. The pump-out frequency control (S4 dip switch 5 & 6) can be set to have a pump out occur every cycle, or every , 5, or 10 cycles, see "II.C.3.d) Pump-Out Frequency Control (S4 dip switch 5 & 6)."

5. Normal Harvest Cycle

LEDs 1, 4, and  are on. Comp and FMR remain energized. FMS de-energizes and the HGV and WV open. As the evaporator warms, the thermistor reaches 48°F (9°C). The control board then receives the thermistor's 3.9 kΩ signal and starts the harvest timer. When the harvest timer completes its countdown, the harvest cycle is complete. The minimum total time allowed by the control board for a complete harvest cycle is  minutes. WV is open during harvest for a maximum of 6 minutes or the length of harvest, whichever is shorter. At the end of harvest, the control board checks the position of the F/S and proceeds to the freeze cycle if it is closed or calls for a 1-minute ll if it is open. The unit continues to cycle through this sequence until the bin control senses ice and shuts the unit down.

Legend: Comp–compressor; FMR–remote fan motors; FMS–self-contained fan motors;

F/S–oat switch; HGV–hot gas valve; LLV–liquid line valve; PM–pump motor; WV–inlet water valve

6. Sequence Flow Chart

Cycle

4. Pump-Out

• Minimum freeze time: 5 minutes

• Maximum freeze time: freeze timer setting

F/S in

control

5 minute timer

in control

F/S closed

PM stops for  sec.,

then reverses for 10/0 sec.

each 1, , 5, or 10 cycles.

Comp continues

FMR continues

Freeze cycle

operation turned

over to F/S

Comp continues

FMR continues

HGV de-energized

WV de-energized

PM energized

HGV energized

FMS de-energized

LLV de-energized

FMS energized

LLV energized

F/S check

1 to 3 minute timer

in control

Thermistor in

2. Harvest Cycle 3. Freeze Cycle

• Maximum inlet water valve time: 6 minutes

• Maximum harvest time: 0 minutes

Fill Cycle

control

F/S closed

F/S check

1. One-Minute

Thermistor temp

reaches 48°F (9°C)

(3.9 kΩ or less)

Harvest timer starts

Comp energized

HGV energized

FMR energized

WV continues

LLV de-energized

F/S open

WV energized

F/S open

Components Energized when the Control Switch is in the "WASH" Position

The "WASH" position on the control switch is used when cleaning and sanitizing the unit. When in the

"WASH" position, power is supplied to the pump motor. With the cleaning valve closed, the cleaner and

sanitizer ow over the outside of the evaporator plate assembly. With the cleaning valve open, the cleaner

and sanitizer ow over both the outside and the inside of the evaporator plate assembly.

Note: Close the cleaning valve after cleaning and sanitizing are complete, otherwise the unit will not re-start

when the control switch is placed in the "ICE" position.

If F/S is open, compressor stops and cycle returns to 1-minute ll

Cycle Steps

KM-1900SAH/3, KM-1900SWH/3, KM-1900SRH/3 Sequence Flow Chart and Component Operation

Initial startup always

begins here

Legend:

Comp-compressor

FMR-remote fan motors

FMS-self-contained fan motors

F/S-oat switch

HGV-hot gas valve

LLV-liquid line valve

PM-pump motor

WV-inlet water valve

C. Control Board

• A Hoshizaki exclusive solid-state control is employed in KM-1900SAH/3, KM-1900SWH/3, and KM-1900SRH/3 Stackable Crescent Cubers.

• All models are pretested and factory-adjusted.

CAUTION

1. Fragile, handle very carefully.

. The control board contains integrated circuits, which are susceptible to

failure due to static discharge. It is especially important to touch the metal part of the unit before handling or replacing the board.

3. Do not touch the electronic devices on the board or the back of the board to prevent damage to the board.

4. Do not change wiring and connections. Do not misconnect K3, K4, and K5, because the same connector is used for the thermistor and oat switch. K4 is not connected.

5. Always replace the whole board assembly if it goes bad.

6. Do not short out power supply to test for voltage.

0

1. Control Board Layout

Control Products "E" Control Board

"ALARM RESET" Button

Backup Freeze Timer LED

Backup Harvest Timer LED

Alarm Buzzer

S4 Dip Switch

"OUTPUT TEST" Button (used to test relays on board)

Connector K3 Harvest Control (thermistor)

Connector K4 Open (not connected)

Power LED (lights when power is supplied to the board)

Relay LEDs (4) (indicate which relays are energized as listed below)

LED  Hot Gas Valve (HGV) Self-Contained Fan Motors (FMS) (FMS off when LED on)

LED 3 Pump Motor (PM) (on at pump out only)

LED 4 Inlet Water Valve (WV)

LED 1 Compressor (Comp) Remote Fan Motors (FMR)

Transformer Connector

Microprocessor (board revision level indicated by last  digits on label)

Connector K5 Float Switch

Part Number

Connector K1

Pins #1 through #10 #1, 9 Magnetic Contactor # Hot Gas Valve #3 Liquid Line Valve Self-Contained Fan Motors (FMS) #4 Pump Motor (icemaking) #5 Pump Motor (pump out) #6 Inlet Water Valve #7, 10 Power Supply #8 Open

Switch for "C" board and "ALPINE" board (service boards only)

Control Board

Part Number 2A1410-01 (factory); 2A1410-02 (service)

Type HOS-001A (Control Products - 10 Pin)

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