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Manual Hoshizaki MRH/3

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  • Hoshizaki MRH/3 - page 1

    Hoshizaki “A Superior Degr ee of Reliability” www .hoshizaki.com Models KM-320MAH, MWH KM-515MAH, MWH, MRH KM-600MAH KM-650MAH, MWH(-M), MRH KM-901MAH, MWH, MRH/3 Modular Crescent Cuber Hoshizaki America, Inc. Number: 73196 Issued: 4-29-2013 SE RV ICE MA NU AL ...

  • Hoshizaki MRH/3 - page 2

    2 W ARNING Only quali ed ser vice technicians should inst all and ser vice the appliance . T o obtain the name and phone number of y our local Hoshizaki Cer ti ed Ser vice Repr esentativ e, visit www .hoshizaki.com. No ser vice should be under tak en until the technician has thor oughly r ead this Ser vice Manual. F ailure t o ser vice and ma ...

  • Hoshizaki MRH/3 - page 3

    3 CONTENTS Impor tant Saf et y Inf or mation ................................................................................................. 6 I. Construction and W ater/R efrigeration Cir cuit Diagr am ....................................................... 8 A. Construction ....................................................................... ...

  • Hoshizaki MRH/3 - page 4

    4 5. Bin Control Select or or Har vest P ump Timer Oper ation (S4 dip s witch 7) ............. 48 6. F actor y Use (S4 dip s witch 8) ................................................................................ 49 7 . F r eez e Timer (S4 dip s witch 9 & 1 0) ....................................................................... 49 8. Float ...

  • Hoshizaki MRH/3 - page 5

    5 C . Wiring Diagrams ......................................................................................................... 87 1 . Diagr ams Without Harvest P ump Timer R ela ys ..................................................... 87 a) KM-320M_H, KM-51 5M_H, KM-600MAH ........................................................ 87 b) KM-650MAH, K ...

  • Hoshizaki MRH/3 - page 6

    6 Impor tant Safety Inf ormation Throughout this man ual, notices appear t o bring your at tention t o situations which could result in death, serious injur y , damage t o the appliance, or damage t o proper t y . W ARNING Indicates a hazar dous situation which could r esult in death or serious injury . NO TICE Indicates a sit uation which could re ...

  • Hoshizaki MRH/3 - page 7

    7 W ARNING, continued • The appliance is not intended f or use by per sons (including children) with r educed ph y sical, sensor y , or mental capabilities, or lac k of e xper ience and knowledge , unless they ha ve been giv en super vision or instr uction concerning use of the appliance by a per son responsib le f or their safety . • Children ...

  • Hoshizaki MRH/3 - page 8

    8 I. Construction and W ater/R efrigeration Cir cuit Diagram A. Construction 1 . Air-Cooled Models (MAH) Ther mostatic Bin Contr ol W ater Suppl y Inlet Condenser Drier Contr ol Box Spra y T ubes Contr ol Switch W ater P ump Float S witch Compr essor Ther mostatic Expansion V alv e F an Motor Hot Gas V alv e Ther mostatic Bin C ontrol Brac k et &am ...

  • Hoshizaki MRH/3 - page 9

    9 2. W at er -Cooled Models (MWH(-M)) W ater Suppl y Inlet Condenser Drier Contr ol Box Spra y T ubes Contr ol Switch W ater P ump Float S witch Compr essor Ther mostatic Expansion V alv e W ater R egulating Va l v e Hot Gas V alv e Cleaning V alv e Ther mostatic Bin Contr ol Ther mostatic Bin C ontrol Brac k et & Bulb Holder Mechanical Bin Con ...

  • Hoshizaki MRH/3 - page 10

    10 3. Remot e Models (MRH/3) Receiv er T ank W ater Suppl y Inlet Junction Bo x es Drier Contr ol Box Spra y T ubes Contr ol Switch W ater P ump Float S witch Compr essor Ther mostatic Expansion V alv es Hot Gas V alv e Liquid Line V alv e Cleaning V alv e Ther mostatic Bin Contr ol Ther mostatic Bin C ontrol Brac k et & Bulb Holder Mechanical ...

  • Hoshizaki MRH/3 - page 11

    11 W at er Supply Float Switch Drain Check V alv e Thermostatic Expansion V alve Compr essor Hot Gas Va l v e High-P ressure Switch Strainer Fa n Drier Condenser Evapor ator Discharge Line Suction Line W at er P ump Thermistor Spra y T ubes Inlet W ater V alv e F reeze P ump Out W at er T ank Refrigeration Cir cuit W at er Circuit Heat Ex changer L ...

  • Hoshizaki MRH/3 - page 12

    12 W at er Supply Float Switch Drain Check V alv e Thermostatic Expansion V alve Compr essor Hot Gas Va l v e High-P ressure Switch Strainer Drier Condenser Evapor ator Discharge Line Suction Line W at er P ump Thermistor Spra y T ubes Inlet W ater V alv e F reeze P ump Out W at er T ank Refrigeration Cir cuit W at er Circuit Heat Ex changer Liquid ...

  • Hoshizaki MRH/3 - page 13

    13 W at er Supply Cleaning V alv e Float Switch Drain Check V alv e Compr essor Hot Gas Va l v e Check V alv es (KM-90 1MRH) High-P ressure Switch Strainer Fa n Drier Condenser Evapor ator Discharge Line Suction Line W at er P ump Thermistor Spra y T ubes Inlet W ater V alv e F reeze P ump-Out W at er T ank Refrigeration Cir cuit W at er Circuit Li ...

  • Hoshizaki MRH/3 - page 14

    14 II. Sequence of Operation and Service Diagnosis A. Sequence of Operation Flo w Char t 1 . "E" and "G" Control Boar d without Harvest P ump Timer Operation Components Energized when the Contr ol S witch is in the "W A SH" P osition The "W ASH" position on the control s witch is used when cleaning and saniti ...

  • Hoshizaki MRH/3 - page 15

    15 1 . Bin F ull Shutdown Dela y: • Fill Cy c le –1 5 sec. af ter activ ation. • Harvest Cyc le –At the end of the har vest cy cle, or up t o 15 sec. into the freez e cy cle if activat ed at the end of the harvest cy cle. • F reeze Cycle –1 5 sec. after activ ation if activated at least 1 5 sec. bef ore the 5-min. shor t cycle pr otecti ...

  • Hoshizaki MRH/3 - page 16

    16 2. "G" Control Boar d with Harvest P ump Timer Oper ation 1 to 3-min. harvest timer in control (S4 dip s witch 1 & 2) • Maximum inlet wat er v alv e time: 6 min. or the length of harvest minus 50 sec. (S4 dip switch 7), whiche v er is shor t er . • Maximum harvest time: 20 min. FS check Legend: Comp –compressor FM –fan mot ...

  • Hoshizaki MRH/3 - page 17

    17 B. Service Diagnosis W ARNING • The appliance should be diagnosed and repair ed only b y quali ed ser vice personnel t o reduce the risk of death, electr ic shoc k, serious injur y , or re . • Risk of electric shock. Contr ol s witch in "OFF" position does not de-energize all loads Use e xtr eme caution and e xer cise safe el ...

  • Hoshizaki MRH/3 - page 18

    18 1 . "E" and "G" Control Boar d without Harvest P ump Timer Diagnosis 3) P ow er On : T ur n on the power suppl y , then mov e the control s witch to the "ICE" position. A 5-sec. delay occur s. • "E" Contr ol Board: CB red "PO WER OK" LED tur ns on. • "G" Contr ol Board: CB red " ...

  • Hoshizaki MRH/3 - page 19

    19 4) 1 -Minut e F ill Cy c le – LED 4 is on. WV energiz es . Af ter 1 min., CB chec ks for a closed FS. If FS is closed, har v est cy cle begins. If har vest c y cle begins (Comp , HGV , and FMR energiz e), continue to st ep 5. If FS is open, WV r emains ener gized thr ough additional 1 -min. ll cy cles until water ent ers the w at er tank an ...

  • Hoshizaki MRH/3 - page 20

    20 e) Initial Harvest Cy c le T ermination Diagnosis : W hen the ther mist or r eaches 48°F (9°C), CB reads 3.9 kΩ fr om the ther mistor and turns har vest t er mination ov er to the har v est timer (S4 dip s witch 1 & 2). Check dischar ge line temperatur e . For a ther mist or chec k, see "II.F .Ther mist or Chec k." If 1 -min. ...

  • Hoshizaki MRH/3 - page 21

    21 d) PM Diagnosis : Conr m wat er is o wing ov er e v aporator fr om PM and not WV . If PM de-energiz es once freeze begins , check f or 1 1 5V AC at CB K1 #4 (R) t o neutral (W). If 1 1 5V A C is not present, r eplace CB . If 1 1 5V AC is pr esent and PM is de-energized, check f or 1 1 5V A C at control s witch #5 (R) to neutral (W). If 1 1 ...

  • Hoshizaki MRH/3 - page 22

    22 7) Pump-Out Cy cle – LEDs 1, 3, and 2 are on (1 0/20 second pump-out). Timing of the rst pump-out is dependent on CB . "E" CB rst pump-out is af t er the r st fr eeze c y cle. "G" CB rst pump-out is det er mined by S4 dip s witch 5 & 6. See the tab le belo w . "E" & "G" Control Boar d ...

  • Hoshizaki MRH/3 - page 23

    23 9) Shutdown a) "E" Control Boar d: Thermostatic Bin Contr ol (TBC): When the appliance is running , hold ice in contact with the thermostatic bulb . TBC switch opens within 1 0 sec., shut ting down the appliance. TBC is f act or y set, and generall y no adjustment is requir ed. Howe ver , adjustment ma y be needed in some conditions , ...

  • Hoshizaki MRH/3 - page 24

    24 2. "G" Control Boar d with Harvest P ump Timer Diagnosis 3) P ow er On : T ur n on the power suppl y , then mov e the control s witch to the "ICE" position. A 5-sec. delay occur s. CB red "PO WER OK" LED and gr een "BC CLOSED" LED turn on. If yellow "BC OPEN" LED is on (indicating a full bin), ch ...

  • Hoshizaki MRH/3 - page 25

    25 4) 1 -Min. Fill Cy c le – LED 4 is on. WV and X1 1 rela y ener giz e. Af ter 1 min., CB chec ks f or a closed FS. If FS is closed, the har v est cy cle begins. If har vest c y cle begins (Comp , HGV , FMR energiz ed), continue t o step 5a. If FS is open, WV r emains ener giz ed through additional 1 -min. ll cy cles until water ent ers the w ...

  • Hoshizaki MRH/3 - page 26

    26 5b) Harvest P ump Timer – LEDs 1, 3, and 2 ar e on. When the thermistor r eaches 48°F (9°C), CB reads 3.9 kΩ fr om the ther mistor and turns har vest t er mination ov er to the har v est timer (S4 dip s witch 1 & 2). 50 sec. bef or e the har v est timer ter minat es , LED 3tur ns on and PM ener giz es. Comp , FMR, HGV , and X1 0 rela ...

  • Hoshizaki MRH/3 - page 27

    27 6) F r eeze Cyc le – LED 1 is on. Comp , FMR, and PM continue . FM and LL V energiz e . HGV and X1 0 r ela y de-energize . Appliance is held in freez e b y a 5-min. shor t cy cle prot ection timer . Af t er 5-min. timer terminates and FS opens , fr eeze c y cle t er minat es . Note: PM power suppl y switches fr om CBK1 #5 (DBU) in har v ...

  • Hoshizaki MRH/3 - page 28

    28 f) Refr ig er ant P r essur es, HM, and TXV Diagnosis : If ev aporator is still not cooling , check r efr igerant pr essures. See "VIII.B . P erformance Dat a." Ne xt, chec k HM operation. If r efrigeration pressur es are abov e HM setpoint and HMis bypassing , replace HM. Check TXV for pr oper operation. Remo ve TXV bulb and hold i ...

  • Hoshizaki MRH/3 - page 29

    29 is complete . The pump-out frequency contr ol (S4 dip switch 5 & 6) is f actory set, and generall y no adjustment is r equir ed. Howe ver , the pump-out frequenc y control can be set to ha ve a pump-out occur e very cycle , or e very 2, 5, or 1 0 cycles . F or details , see "III.C .4. P ump-Out F r equency C ontr ol (S4 dip s witch 5 &a ...

  • Hoshizaki MRH/3 - page 30

    30 C. Control Boar d Check Bef or e r eplacing CB that does not sho w a visib le def ect and that y ou suspect is bad, alw ay s conduct the follo wing chec k pr ocedur e. This procedur e will help you v erify your diagnosis. Alar m R eset: If CB is in alar m (beeping), press the "ALARM RESET" b ut ton on CB while CB is beeping. W ARNING!? ...

  • Hoshizaki MRH/3 - page 31

    31 D . Bin Contr ol Check 1 . Thermostatic Bin Contr ol Check TBC shuts down the icemak er within 1 0 sec. when ice contacts the ther mostatic b ulb , reg ardless of the cy cle at activation. NO TICE When the ambient t emperature is belo w 45°F (7°C), TBC opens and shuts do wn the appliance e v en if the ice storage bin is empty . When BC is set ...

  • Hoshizaki MRH/3 - page 32

    32 2. Mechanical Bin Control Chec k and Cleaning a) Mechanical Bin Contr ol Check This appliance uses a le v er -actuated pro ximit y s witch to contr ol the ice le vel in the stor age bin. No adjustment is requir ed. T o check TBC, f ollow the st eps below . 1) T ur n of f the power suppl y . 2) Remo ve the fr ont panel, then mo v e the contr ol s ...

  • Hoshizaki MRH/3 - page 33

    33 b) Mechanical Bin Contr ol Cleaning Scale ma y b uild up on MBC . Scale can cause the actuator paddle and magnet t o stick. In this case, MBC should be cleaned. W ARNING CHOKING HAZARD: Ensure all components , fast eners, and thumbscr ews ar e securel y in place af t er the icemak er is ser viced. Make sur e that none ha v e fallen into the disp ...

  • Hoshizaki MRH/3 - page 34

    34 E. Float S witch Chec k and Cleaning FS is used to det er mine that there is suf ficient w ater in the wat er tank af ter the 1 -min. ll c y cle and af ter each harvest cy cle. FS is also used to det er mine that the appr opriate v olume of wat er has been conv er ted int o ice befor e switching out of the fr eez e cy cle. No adjustment is re ...

  • Hoshizaki MRH/3 - page 35

    35 2. Float Switc h Cleaning Depending on local wat er conditions, scale ma y b uild up on FS . Scale on the switch can cause the  oat t o stic k. In this case, FS should be cleaned. 1) T ur n of f the power suppl y . 2) Remo ve the fr ont panel, then mo v e the contr ol s witch to the "OFF" position. 3) Remo ve the base co v er , then ...

  • Hoshizaki MRH/3 - page 36

    36 F . Thermist or Check T o check thermistor r esistance , f ollow the steps belo w . 1) T ur n of f the power suppl y . 2) Remo ve the fr ont panel. Mov e the contr ol s witch to the "OFF" position. 3) Remo ve the contr ol bo x cov er . 4) Remo ve the thermistor fr om the r efrigerant tubing. 5) Immerse the thermistor sensor por tion in ...

  • Hoshizaki MRH/3 - page 37

    37 G. Diagnostic T ables 1 . No Ice Pr oduction No Ice Pr oduction - Possib le Cause 1. P ower Suppl y a) Of f, b lown fuse , or tripped break er . b) Not within specications. 2. Main T ransf ormer (3 phase and KM-650MWH-M only) (208/230V A C/1 1 5V AC) a) V oltage tap s witch not set t o pr oper v oltage . b) Coil winding open or shor t ed. 3. ...

  • Hoshizaki MRH/3 - page 38

    38 No Ice Pr oduction - Possib le Cause 15 . Ther mist or See "II.F . Ther mistor Chec k" a) Loose, disconnect ed, or def ective. 16 . P ump Motor a) Motor winding open. b) Bearing wor n out or loc ked r otor . c) Def ectiv e capacitor . d) Mechanical seal worn out. 1 7. Thermostatic Expansion V alve a) Bulb loose. b) Operating erraticall ...

  • Hoshizaki MRH/3 - page 39

    39 F reeze-Up - P ossible Cause 1 1. Thermostatic Expansion V alv e a) Def ectiv e. 12 . Hot Gas V alv e a) Closed or restricted. 13 . Liquid Line V alv e a) Open. F reeze Cyc le 1. Evapor at or a) Scaled up . b) D amaged. 2. Spra y T ubes and/or Spray Guides a) Dir ty . b) Out of position. 3. Refrigerant Charge a) L o w. 4. Control Boar d See &quo ...

  • Hoshizaki MRH/3 - page 40

    40 Low Ice P r oduction - P ossible Cause Long F reeze Cyc le 1. Evapor at or a) Scaled up , dir ty . 2. Float Switch See "II.E. Float Switch Chec k and Cleaning" a) Scaled up , dir ty . b) Float sticking . c) Def ectiv e s witch. 3. Inlet W ater V alv e a) Leaking by . 4. Hot Gas V alv e a) Erratic or open. 5. Condenser a) Clogged. 6. Co ...

  • Hoshizaki MRH/3 - page 41

    41 III. Controls and A djustments • A Hoshizaki e x clusive contr ol board is emplo yed in KM series appliances. • All models are pr etest ed and f actor y adjust ed. • F or a contr ol boar d chec k pr ocedur e, see "II.C . Control Boar d Check." NO TICE • F ragile, handle v er y carefull y . • The control boar d contains integ ...

  • Hoshizaki MRH/3 - page 42

    42 A. Control Boar d L a y out 1 . "E" Control Boar d "E" Control Boar d P ar t Number 2A1 41 0-02 "E" Contr ol Boar d Micropr ocessor (control boar d r e vision le vel indicat ed on label on side of rela y) • P art Number • K1 Connector Pins #1 through #1 0 #1, 9 Magnetic Contact or or Compr essor Rela y #2 Hot Ga ...

  • Hoshizaki MRH/3 - page 43

    43 "G" Control Boar d P ar t Number 2A3792-0 1 "G" Contr ol Boar d • K4 (red) Connect or Mechanical Bin Contr ol or K4 Jumper (thermostatic bin control application) Label (control boar d r e vision le vel indicat ed on label on side of rela y) • K1 Connector Pins #1 through #1 0 #1, 9 Magnetic Contact or or Compr essor Rela ...

  • Hoshizaki MRH/3 - page 44

    44 B. LED Lights and A udible Alarm Saf eties 1 . "E" Control Boar d At star tup , a 5-second delay occur s while the control boar d conducts an internal timer check. A beep occur s when pow er is tur ned of f . The red "PO WER OK" LED indicates proper contr ol volt age and r emains on unless a control v oltage pr ob lem occur s ...

  • Hoshizaki MRH/3 - page 45

    45 2. "G" Control Boar d At star tup , a 5-second delay occur s while the control boar d conducts an int er nal timer check. A beep occur s when the control s witch is mov ed to the "ICE" position. The red "PO WER OK" LED indicat es pr oper contr ol v oltage and r emains on unless a control v oltage pr oblem occur s. T ...

  • Hoshizaki MRH/3 - page 46

    46 C. Set tings and Adjustments NO TICE Dip s witches ar e f actor y set. F ailure t o maintain f actory set tings ma y adver sel y af fect perf or mance and warr anty cov erage . F or mor e inf ormation, contact your Hoshizaki Ser vice Cent er . 1 . Default Dip Switch Set tings The dip s witches ar e f actor y -adjusted t o the follo wing position ...

  • Hoshizaki MRH/3 - page 47

    47 2. Har v est Timer (S4 dip switc h 1 & 2) The har v est timer star ts counting when the thermistor r eaches 48°F (9°C) at the e v aporator outlet and the contr ol board reads 3.9 kΩ fr om the ther mistor . The har vest timer is f act or y set, and generall y no adjustment is requir ed. Howe ver , a set ting longer than the f act or y set ...

  • Hoshizaki MRH/3 - page 48

    48 4. Pump-Out F requency Contr ol (S4 dip switch 5 & 6) NO TICE Do not adjust on KM-51 5M_H without har vest pump timer . Adjustments t o this set ting on KM-51 5M_H without har vest pump timer ma y adver sely af f ect perf or mance and warr anty cov erage . The pump-out frequenc y contr ol is f actor y set t o drain the w ater tank e very 1 0 ...

  • Hoshizaki MRH/3 - page 49

    49 (2) Harvest P ump T imer , "G" Control Boar d NO TICE F actory set for pr oper operation. Do not adjust. Adjustment outside of the f actor y def ault set ting ma y r esult in damage t o the appliance. Depending on the har v est pump timer set ting, the pump mot or either sta ys of f or is energiz ed the last 50 seconds of har vest. Whe ...

  • Hoshizaki MRH/3 - page 50

    50 8. Float Switc h Select or (S5 dip switc h 1): "G" Control Boar d NO TICE Do not adjust. This must be lef t in the f actor y def ault position or the icemaker will not operat e corr ectl y . 9. Re ll Counter (S5 dip switch 2 thr ough 5): "G" Contr ol Boar d NO TICE Do not adjust. These must be lef t in the f actor y def au ...

  • Hoshizaki MRH/3 - page 51

    51 IV . R efr igeration Cir cuit and Component Ser vice Inf ormation W ARNING • This appliance should be diagnosed and repair ed only b y quali ed ser vice personnel t o reduce the risk of death, electr ic shoc k, serious injur y , or re . • Mov e the control s witch to the "OFF" position and turn off the po wer supply . Place t ...

  • Hoshizaki MRH/3 - page 52

    52 2. Brazing W ARNING • R-404A itself is not  ammab le at atmospheric pressur e and temperatur es up t o 1 7 6°F (80°C). • R-404A itself is not e xplosiv e or poisonous. Howe ver , when exposed t o high temper atur es (open  ames), R-404A can be decomposed to f or m hy drouoric acid and carbonyl uoride both of which are hazar dou ...

  • Hoshizaki MRH/3 - page 53

    53 5) Disconnect the gauge manif old hose from the v acuum pump and at tach it t o a refrigerant service cylinder . Remember t o loosen the connection and purge the air fr om the hose. F or the r equir ed r efrigerant charge , see the rating label inside the icemaker . Hoshizaki recommends onl y virgin r efrigerant or r eclaimed refrigerant which m ...

  • Hoshizaki MRH/3 - page 54

    54 B. Component Service Infor mation NO TICE When r eplacing a component listed belo w , see the notes t o help ensur e pr oper operation. Component Notes Compr essor 1 phase: Install a ne w star t capacitor , run capacitor , and star t rela y . 3 phase: Install a new magnetic cont actor . Thermostatic Expansion V alves • At tach the thermostatic ...

  • Hoshizaki MRH/3 - page 55

    55 V . Maint enance The maintenance schedule belo w is a guideline. More fr equent maintenance ma y be requir ed depending on wat er quality , the appliance's en vir onment, and local sanitation regulations W ARNING • Only quali ed ser vice technicians should service the appliance. • T o reduce the risk of electr ic shoc k, do not t ouc ...

  • Hoshizaki MRH/3 - page 56

    56 VI. Pr eparing the Appliance for P eriods of Non-Use NO TICE • When st oring the appliance f or an e xt ended time or in sub-fr eezing t emperatur es, f ollo w the instructions below t o pr e v ent damage. • T o pre vent damage t o the w at er pump , do not operate the appliance with the control s witch in the "W ASH" position when ...

  • Hoshizaki MRH/3 - page 57

    57 3. On wat er -cooled model, remo v e the w ater fr om the wat er -cooled condenser: 1) Make sur e the power suppl y is off , then remo ve the fr ont panel and right side panel. 2) Close the condenser wat er supply line shut-of f val ve . If connected t o a closed loop sy stem, also close the condenser r eturn line shut-of f v al v e . 3) Open th ...

  • Hoshizaki MRH/3 - page 58

    58 VII. Disposal The appliance contains r efrigerant and must be disposed of in accor dance with applicable national, st at e , and local codes and r egulations. Refrigerant m ust be reco ver ed b y pr operly cer ti ed ser vice personnel. ...

  • Hoshizaki MRH/3 - page 59

    59 VIII. T echnical Infor mation A. Specication Sheets 1 . KM-320MAH AC SUPPLY VOLTAG E 115/60/1 AMPERAGE 9.7 A (5 Min. Freeze AT 104°F /W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *325 (147) 311 (141) 287 (130) ...

  • Hoshizaki MRH/3 - page 60

    60 2. KM-320MWH AC SUPPLY VOLTAG E 115/60/1 AMPERAGE 8.2 A (5 Min. Freeze AT 104°F / W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *352 (160) 348 (158) 324 (147) Referenc e without *mark s 80 349 (158) 342 (155) 309 ( ...

  • Hoshizaki MRH/3 - page 61

    61 3. KM-51 5MAH AC SUPPLY VOLTAG E 115/60/1 AMPERAGE 11.7 A (5 Min. F reeze AT 104°F/W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *501 (227) 482 (218) 447 (203) Referenc e without *mark s 80 486 (221) 456 (207) 416 ...

  • Hoshizaki MRH/3 - page 62

    62 4. KM-51 5MWH AC SUPPLY VOLTAG E 115/60/1 AMPERAGE 9.6 A (5 Min. Freeze AT 104°F /W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *500 (227) 481 (218) 465 (211) Referenc e without *mark s 80 486 (220) 457 (207) 445 ( ...

  • Hoshizaki MRH/3 - page 63

    63 5. KM-51 5MRH AC SUPPLY VOLTAG E 115/60/1 AMPERAGE 11.3A (5 Min. F reeze AT 104°F/W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *491 (223) 480 (218) 443 (201) Referenc e without *mark s 80 482 (219) 465 (211) 417 ( ...

  • Hoshizaki MRH/3 - page 64

    64 6. KM-60 0MAH AC SUPPLY VOLTAGE 115- 120/60/1 AMPERAGE 12.0 A (5 Min. Freeze AT 104°F /W T 80°F) MINIMUM CIRCUIT AMPACIT Y 15 A MAXIMUM FUSE SIZE 15 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *592 (269) 566 (257) 516 (234) Referenc e without *mark s 80 572 (260) 532 (241) ...

  • Hoshizaki MRH/3 - page 65

    65 7 . KM-650MAH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V) AMPERAGE 7.2 A (5 Min. Freeze AT 104°F /W T 80°F) MINIMUM CIRCUIT AMPACIT Y 15 A MAXIMUM FUSE SIZE 15 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *661 (300) 632 (287) 591 (268) Referenc e without *mark s 80 639 ...

  • Hoshizaki MRH/3 - page 66

    66 8. KM-650MWH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V) AMPERAGE 5.4 A (5 Min. Freeze AT 104°F /W T 80°F) MINIMUM CIRCUIT AMPACIT Y 15 A MAXIMUM FUSE SIZE 15 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *661 (300) 649 (294) 616 (280) Referenc e without *mark s 80 652 ( ...

  • Hoshizaki MRH/3 - page 67

    67 A W AITING D A T A 9. KM-650MWH-M Note: We r eserve the right to mak e changes in specications and design without prior notice. ...

  • Hoshizaki MRH/3 - page 68

    68 1 0. KM-650MRH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V) AMPERAGE 7.4 A (5 Min. Freeze AT 104°F/WT 80°F) MINIMUM CIRCUIT AMPACITY 15 A MAXIMUM FUSE SIZE 15 A APPROXIMATE ICE PRODUCTION Ambient WATER TEMP. (°F) PER 24 HR. Temp.(°F) 50 70 90 lbs./day ( kg/day ) 70 *632 (287) 612 (278) 574 (260) Reference without *marks 80 617 (280) 586 ...

  • Hoshizaki MRH/3 - page 69

    69 1 1 . KM-90 1MAH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V) AMPERAGE 11.4 A (5 Min. F reeze AT 104°F/W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *874 (396) 832 (378) 785 (356) Referenc e without *mark s 80 ...

  • Hoshizaki MRH/3 - page 70

    70 1 2. KM-90 1MWH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V) AMPERAGE 8.7A (5 Min. Freeze AT 104°F /W T 80°F) MINIMUM CIRCUIT AMPACIT Y 15 A MAXIMUM FUSE SIZE 15 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *912 (414) 887 (402) 849 (385) Referenc e without *mark s 80 893 ...

  • Hoshizaki MRH/3 - page 71

    71 1 3. KM-90 1MRH AC SUPPLY VOLTAGE 208-230/60/1 (3 wire for 115V) AMPERAGE 11.6A (5 Min. Freeze AT 104°F /W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *889 (403) 859 (389) 803 (364) Referenc e without *mark s 80 86 ...

  • Hoshizaki MRH/3 - page 72

    72 1 4. KM-90 1MRH3 AC SUPPLY VOLTAGE 208- 230/60/3 AMPERAGE 7.0A (5 Min. Freeze AT 104°F /W T 80°F) MINIMUM CIRCUIT AMPACIT Y 20 A MAXIMUM FUSE SIZE 20 A APPROXIMAT E ICE PRODUCTIO N Am bient W AT ER TEMP. (°F) PER 24 HR. Tem p.(°F) 50 70 90 lbs./day ( kg/day ) 70 *899 (408) 874 (397) 817 (371) Referenc e without *mark s 80 880 (399) 842 (382) ...

  • Hoshizaki MRH/3 - page 73

    73 B. P erf ormance Data 1 . KM-320MAH 70/21 325 147 311 141 287 130 80/27 315 143 293 133 265 120 90/32 311 141 278 126 251 114 lbs./day kg./da y 100/38 304 138 272 123 226 103 70/21 80/27 90/32 watts 100/38 70/21 117 0.44 97 0.37 86 0.33 80/27 102 0.39 72 0.27 69 0.26 90/32 97 0.37 51 0.19 44 0.17 gal./day m 3 /day 100/38 75 0.28 50 0.19 38 0.14 ...

  • Hoshizaki MRH/3 - page 74

    74 2. KM-320MWH 70/21 352 160 348 158 324 147 80/27 349 158 342 155 309 140 90/32 348 158 337 153 308 140 lbs./day kg./da y 100/38 337 153 330 150 281 127 70/21 80/27 90/32 watts 100/38 70/21 430 1.63 476 1.80 682 2.58 80/27 465 1.76 535 2.03 822 3.11 90/32 476 1.80 585 2.21 842 3.19 gal./day m 3 /day 100/38 605 2.29 645 2.44 1078 4.08 70/21 80/27 ...

  • Hoshizaki MRH/3 - page 75

    75 3. KM-51 5MAH 70/21 501 227 482 218 447 203 80/27 486 221 456 207 416 189 90/32 482 218 435 197 396 180 lbs./day kg./day 100/38 472 214 426 193 361 164 70/21 80/27 90/32 watts 100/38 70/21 188 0.71 162 0.61 147 0.56 80/27 168 0.64 128 0.48 124 0.47 90/32 162 0.61 99 0.38 90 0.34 gal./day m 3 /day 100/38 132 0.50 97 0.37 82 0.31 70/21 80/27 90/32 ...

  • Hoshizaki MRH/3 - page 76

    76 4. KM-51 5MWH 70/21 500 227 481 218 465 211 80/27 486 220 457 207 445 202 90/32 481 218 436 198 422 191 lbs./day kg./da y 100/38 481 218 433 196 409 186 70/21 80/27 90/32 watts 100/38 70/21 515 1.95 548 2.07 805 3.05 80/27 540 2.04 591 2.24 966 3.6 6 90/32 548 2.07 628 2.38 958 3.63 gal./day m 3 /day 100/38 688 2.60 705 2.67 1262 4.78 70/21 80/2 ...

  • Hoshizaki MRH/3 - page 77

    77 5. KM-51 5MRH 70/21 491 223 480 218 443 201 80/27 482 219 465 211 417 189 90/32 480 218 452 205 408 185 lbs./day kg./da y 100/38 465 211 442 200 368 167 70/21 80/27 90/32 watts 100/38 70/21 198 0.75 168 0.64 153 0.58 80/27 175 0.66 128 0.48 128 0.49 90/32 168 0.64 94 0.36 88 0.33 gal./day m 3 /day 100/38 133 0.50 93 0.35 82 0.31 70/21 80/27 90/3 ...

  • Hoshizaki MRH/3 - page 78

    78 6. KM-60 0MAH 70/21 592 269 566 257 516 234 80/27 572 260 532 241 474 215 90/32 566 257 503 228 447 203 lbs./day kg./da y 100/38 551 250 490 222 396 180 70/21 80/27 90/32 watts 100/38 70/21 259 0.98 212 0.80 191 0.72 80/27 223 0.84 150 0.57 154 0.58 90/32 212 0.80 99 0.38 92 0.35 gal./day m 3 /day 100/38 160 0.61 97 0.37 85 0.32 70/21 80/27 90/3 ...

  • Hoshizaki MRH/3 - page 79

    79 7 . KM-650MAH 70/21 661 300 632 287 591 268 80/27 639 290 594 269 553 251 90/32 632 287 562 255 520 236 lbs./day kg./da y 100/38 624 283 552 250 482 219 70/21 80/27 90/32 watts 100/38 70/21 232 0.88 194 0.73 172 0. 65 80/27 203 0.77 143 0.54 139 0.53 90/32 194 0.73 101 0.38 89 0.34 gal./day m 3 /day 100/38 149 0.56 98 0.37 78 0.30 70/21 80/27 90 ...

  • Hoshizaki MRH/3 - page 80

    80 8. KM-650MWH 70/21 661 300 649 294 616 280 80/27 652 296 633 287 591 268 90/32 649 294 620 281 581 264 lbs./day kg./da y 100/38 637 289 611 277 546 248 70/21 80/27 90/32 watts 100/38 70/21 744 2.81 784 2.97 1169 4.42 80/27 775 2.93 838 3.17 1405 5.32 90/32 784 2.97 882 3.34 1380 5.22 gal./day m 3 /day 100/38 985 3.73 999 3.78 1838 6.96 70/21 80/ ...

  • Hoshizaki MRH/3 - page 81

    81 9. KM-650MWH-M A W AITING D A T A Note: 1 . P r essure dat a is r ecor ded at 5 min. into fr eezing cy cle. The data not in bold should be used f or r ef erence onl y . 2. W e reser v e the right to mak e changes in specications and design without prior notice. ...

  • Hoshizaki MRH/3 - page 82

    82 1 0. KM-650MRH 70/21 632 287 612 278 574 260 80/27 617 280 586 266 541 246 90/32 612 278 564 256 521 236 lbs./day kg./day 100/38 601 272 554 251 482 219 70/21 80/27 90/32 watts 100/38 70/21 267 1.01 216 0.82 195 0.74 80/27 228 0.86 149 0.56 155 0.59 90/32 216 0.82 93 0.35 88 0.33 gal./day m 3 /day 100/38 160 0.61 92 0.35 82 0.31 70/21 80/27 90/3 ...

  • Hoshizaki MRH/3 - page 83

    83 1 1 . KM-90 1MAH 70/21 874 396 832 378 785 356 80/27 842 382 778 353 736 334 90/32 832 378 732 332 687 312 lbs./day kg./day 100/38 826 375 721 327 646 293 70/21 80/27 90/32 watts 100/38 70/21 240 0.91 212 0.80 187 0.71 80/27 219 0.83 175 0.66 158 0.60 90/32 212 0.80 143 0.54 123 0.46 gal./day m 3 /day 100/38 175 0.66 139 0.52 103 0.39 70/21 80/2 ...

  • Hoshizaki MRH/3 - page 84

    84 1 2. KM-90 1MWH 70/21 912 414 887 402 849 385 80/27 893 405 854 388 815 370 90/32 887 402 827 375 787 357 lbs./day kg./da y 100/38 878 398 818 371 751 341 70/21 80/27 90/32 watts 100/38 70/21 876 3.32 1010 3.82 1530 5.79 80/27 978 3.70 1186 4.49 1893 7.17 90/32 1010 3.82 1332 5.04 1971 7.46 gal./day m 3 /day 100/38 1355 5.13 1482 5.61 2 559 9.69 ...

  • Hoshizaki MRH/3 - page 85

    85 1 3. KM-90 1MRH 70/21 889 403 859 389 803 364 80/27 866 393 818 371 755 343 90/32 859 389 785 356 724 328 lbs./day kg./da y 100/38 843 382 771 350 668 303 70/21 80/27 90/32 watts 100/38 70/21 246 0.93 219 0.83 194 0.74 80/27 225 0.85 182 0.69 165 0.63 90/32 219 0.83 152 0.57 131 0.50 gal./day m 3 /day 100/38 182 0.69 147 0.56 112 0.42 70/21 80/2 ...

  • Hoshizaki MRH/3 - page 86

    86 1 4. KM-90 1MRH3 70/21 899 408 874 397 817 371 80/27 880 399 842 382 772 350 90/32 874 397 815 370 749 340 lbs./day kg./da y 100/38 855 388 800 363 689 313 70/21 80/27 90/32 watts 100/38 70/21 254 0.96 222 0.84 203 0.77 80/27 230 0.87 181 0.69 174 0.66 90/32 222 0.84 147 0.56 134 0.51 gal./day m 3 /day 100/38 185 0.70 144 0.54 123 0.46 70/21 80/ ...

  • Hoshizaki MRH/3 - page 87

    87 C. W iring Diagrams 1 . Diagrams Without Harv est Pump Timer Rela y s a) KM-320M_H, KM-51 5M_H, KM-60 0MAH * High-P ressur e S witch Air -Cooled Model W ater -Cooled Model Cut-out 41 2± 22 PSIG 384± 22 PSIG Cut-in 327±22 PSIG 284±22 PSIG 0 * Contr ol T ransf or mer Output 1 0.5V at 1 15V 0 ...

  • Hoshizaki MRH/3 - page 88

    88 b) KM-650MAH, KM-650MWH, KM-90 1MAH, KM-90 1MWH * Contr ol T ransf or mer Output 1 0.5V at 1 15V * High-P ressur e S witch Air -Cooled Model W ater -Cooled Model Cut-out 41 2± 22 PSIG 384± 22 PSIG Cut-in 327±22 PSIG 284±22 PSIG 0 0 ...

  • Hoshizaki MRH/3 - page 89

    89 c) KM-650MRH, KM-90 1MRH * High-P ressur e S witch Cut-out 41 2± 22 PSIG Cut-in 327±22 PSIG 0 * Contr ol T ransf or mer Output 1 0.5V at 1 15V ...

  • Hoshizaki MRH/3 - page 90

    90 d) KM-90 1MRH3 * High-P ressur e S witch Cut-out 41 2± 22 PSIG Cut-in 327±22 PSIG 0 * Contr ol T ransf or mer Output 1 0.5V at 1 15V ...

  • Hoshizaki MRH/3 - page 91

    91 2. Diagrams With Harv est P ump Timer Rela ys a) KM-51 5MAH * High-P ressur e S witch Cut-out 41 2± 22 PSIG Cut-in 327±22 PSIG 0 * Contr ol T ransf or mer Output 1 0.5V at 1 15V ...

  • Hoshizaki MRH/3 - page 92

    92 b) KM-650MAH, KM-650MWH, KM-90 1MAH * High-P ressur e S witch Air -Cooled Model W ater -Cooled Model Cut-out 41 2± 22 PSIG 384± 22 PSIG Cut-in 327±22 PSIG 284±22 PSIG 0 * Contr ol T ransf or mer Output 1 0.5V at 1 15V 0 ...

  • Hoshizaki MRH/3 - page 93

    93 c) KM-650MWH-M * High-P ressur e S witch Cut-out 384± 22 PSIG Cut-in 284±22 PSIG 0 * Contr ol T ransf or mer Output 1 0.5V at 1 15V ...

  • Hoshizaki MRH/3 - page 94

    94 * High-P ressur e S witch Cut-out 41 2± 22 PSIG Cut-in 327±22 PSIG 0 * Contr ol T ransf or mer Output 1 0.5V at 1 15V d) KM-650MRH ...

Manufacturer Hoshizaki Category Ice Maker

Documents that we receive from a manufacturer of a Hoshizaki MRH/3 can be divided into several groups. They are, among others:
- Hoshizaki technical drawings
- MRH/3 manuals
- Hoshizaki product data sheets
- information booklets
- or energy labels Hoshizaki MRH/3
All of them are important, but the most important information from the point of view of use of the device are in the user manual Hoshizaki MRH/3.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals Hoshizaki MRH/3, service manual, brief instructions and user manuals Hoshizaki MRH/3. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product Hoshizaki MRH/3.

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A complete manual for the device Hoshizaki MRH/3, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use Hoshizaki MRH/3 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of Hoshizaki MRH/3.

A complete Hoshizaki manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual Hoshizaki MRH/3 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the Hoshizaki MRH/3, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the Hoshizaki MRH/3, that we can find in the current document
3. Tips how to use the basic functions of the device Hoshizaki MRH/3 - which should help us in our first steps of using Hoshizaki MRH/3
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with Hoshizaki MRH/3
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of Hoshizaki MRH/3 in a specific country, if it was not possible to solve the problem on our own.

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