Scotsman NW308 Service Manual
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Scotsman NW308 Service Manual

Electronic modular cubers
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Part Number : 98020304-00
 
SERVICE MANUAL
NW308/508
NW458/608/1008
Electronic Modular Cubers
 
 
(22inch Model)
(30inch Model)
 
 
Version : B

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Summary of Contents for Scotsman NW308

  • Page 1         SERVICE MANUAL NW308/508 (22inch Model) NW458/608/1008 (30inch Model) Electronic Modular Cubers         Part Number : 98020304-00 Version : B    ...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Table of contents Specifications 3-11 FOR THE INSTALLER Introduction Storage bin Standard legs Important operating requirements Select location Storage bin Ice machine Air Baffle Stacking instructions FOR THE PLUMBER Conform to all applicable codesWater inlet Drains For the electrician Electrical connections Final check list START-UP...
  • Page 3 WIRING DIAGRAM NW 308/508 NW 458/608 NW 1008 (220V) NW 1008 (380V) SERVICE DIAGNOSIS MAINTENANCE & CLEANING INSTRUCTION Icemaker Ice storage bin Cabinet exterior Cleaning (Icemaker)  ...

  • Page 4: Specifications

    SPECIFICATIONS   MODULAR CUBER NW 308/508 Ice Making Capacity  ...
  • Page 5 NOTE.To keep your Modular cuber performing at its maximum capacity, it is necessary to perform periodic maintenance as outlined on page 34&35 of this manual.  ...
  • Page 6 SPECIFICATIONS MODULAR CUBER NW 308/508  ...
  • Page 7 SPECIFICATIONS   MODULAR CUBER NW 458     Ice Making Capacity       NOTE.To keep your Modular cuber performing at its maximum capacity, it is necessary to perform periodic maintenance as outlined on page 34&35 of this manual.  ...
  • Page 8 SPECIFICATIONS MODULAR CUBER NW 458    ...
  • Page 9 SPECIFICATIONS MODULAR CUBER NW608   Ice Making Capacity   NOTE.To keep your Modular cuber performing at its maximum capacity, it is necessary to perform periodic maintenance as outlined on page 34&35 of this manual.    ...
  • Page 10   SPECIFICATIONS MODULAR CUBER NW608                                ...
  • Page 11 SPECIFICATIONS MODULAR CUBER NW1008 Ice Making Capacity NOTE.To keep your Modular cuber performing at its maximum capacity, it is necessary to perform periodic maintenance as outlined on page 34&35 of this manual.    ...
  • Page 12 SPECIFICATIONS MODULAR CUBER NW1008  ...

  • Page 13: For The Installer Introduction

    15 cm. minimum left, right, and rear for air-cooled models. STORAGE BIN The Scotsman bins for these units are the NB 393, NB530 and NB948. INSTALLATION NOTE: Allow 15 minimum Other bins may be available with bin tops to space at sides and back for ventilation and vary the storage capacity.

  • Page 14: Ice Machine

    Page 15 ICE MACHINE AIR BAFFLE The use of a mechanical lift is recommended Install on the back side of the machine the air for lifting the uncrated icemaker onto the bin. baffle as per instruction provided with it. Remove front, top and sides panels. Place the unit directly onto the bin, align it with the back of the bin.

  • Page 15: For The Plumber

    FOR THE PLUMBER build-up on parts in the water system. Heavily chlorinated water can be controlled using charcoal or carbon filters. CONFORM TO ALL APPLICABLE CODES WATER INLET DRAINS AIR-COOLED MODELS: The recommended AIR-COOLED MODELS: There is one 20 mm. water supply is cold water connected to the - diameter sump drain fitting at the back of the 3/4'’...

  • Page 16: For The Electrician

    NOTE: All SCOTSMAN Cubers require a neutral wire and a solid earth ground wire to prevent possible severe Electrical Shock Injury to individuals or extensive damage to equipments.

  • Page 17: Final Check List

    5 bar. TYPICAL STACKING INSTALLATION KIT STACKING KSC 450: TO STACK 2 NW 458 KIT STACKING KSC 450: TO STACK 2 NW608 KIT STACKING KSC 1000: TO STACK 2 NW 1008 (NW308/508 NOT DESIGNED FOR STACKING)  ...

  • Page 18: Start-Up

    Water Level Sensor. START-UP START-UP CYCLE 1.Open the water tap/valve and switch ON the power on the electrical supply line. 2.The models NW308-508-458- 608-808 enter in the Start Up cycle with Board energized, andNW1008 enter in 90 minutes delay time controlled by PC Board, The LED of ICE MAKING blinking slow.

  • Page 19: Harvest Cycle

    9. First freezing time will range between 15 This screw position determines the distance and 20 minutes. Longer time for temperature between the sensor reeds and the egg-crate evaporator thus keeping the ice cube at a above 25℃ and shorter time required when proper thickness.

  • Page 20: Refrigeration During Freeze

    Page 19 OPERATION FREEZE CYCLE REFRIGERATION SYSTEM SCHEMATIC REFRIGERATION DURING FREEZE: evaporator section of the refrigeration system. This ice machine employs either air or water This is determined by the temperature of the as a condensing media, the refrigeration TXV sensing bulb, located on the suction line system for either one is a follows: manifold, at the outlet of the evaporator.

  • Page 21: Water System

    FREEZE CYCLE WATER SYSTEM A combination of a solenoid water inlet valve the evaporator surface by gravity. As it flows with a water level sensor is used to control the across the refrigerated evaporator, some of level of the water into the reservoir or sump. the water will be chilled enough to change A pump, running continuously, after the first form, turn to ice, and stay frozen onto the...

  • Page 22: Refrigeration System During Harvest

    HARVEST CYCLE REFRIGERATION SYSTEM SCHEMATIC REFRIGERATION SYSTEM DURING All water remained in the reservoir at the end HARVEST of freezing cycle is pumped-out, to the waste, through the water purge valve and drain line, The refrigeration system performs the harvest eliminating possible build-up...

  • Page 23: Control Sequence

    CONTROL SEQUENCE BIN FULL LED. The machine will restart when the ice deflector At the start of the freezing cycle, the contacts will be back in its normal vertical position of the magnetic switch mechanically operated provided that 3' are elapsed from unit stop. If bythe actuator plate of the deflector cover are not the machine will delay its restart till 3' are closed, thereby - via PC board - closing the...
  • Page 24 The fifth red LED is on steady: Both the fourth red LED and Too High discharge pressure, second green LED are blinking higher than 33 bar (460 PSI) fast: For the first 2 times, machine will 5 times too long Freeze Cycle automatic reset when pressure time drop down.

  • Page 25: Pc Board Set Up

    PC BOARD SET UP Fill water in first 4’ in freezing cycle The PC Board can be set up for: Fill water in first 10’in freezing cycle MANUAL RESET MODE To Restart the machine it is necessary to #6&#7 Water purge control Push the MODE Button #6-OFF/#7-OFF Water pump work 30”...

  • Page 26: Service Specifications

    Cube Size Control Ice Sensor - distance Refrigerant metering device from evaporator 3~5 mm Thermostatic expansion valve. Refrigerant charge R 404A NW1008 NW1008 MODEL NW308 NW508 NW 458 NW 608 380V 220V Air cooled 50 Hz 1600 1350 Air cooled 60 Hz -----...

  • Page 27: Component Description

    COMPONENT DESCRIPTION Front Console Panel BUTTONA Reset/Washing LEDNo.1 Alarm high pressure LEDNo.2 Alarm LEDNo.3 Bin full. LEDNo.4 Operation LEDNo.5 Electrical power supply NW SERIES Power in (liver line)  Compressor contactor Water inlet valve & Water pump & Water purge valve & Harvest valve & Fan motor  Ice thickness sensor Fuse ...
  • Page 28 components output, and two buttons for The condenser temperature sensor probe MODE and clean, and one DIP Switch for PC (located in contact with the condenser tube board setup. coil) detects condenser temperature variations and signals them by supplying 3. Compressor Contactor current, at low voltage, to the P.C.
  • Page 29 sump to the tee. From there water is channeled through the vertical PVC tube to the water distributors, above the evaporator 15. Water level sensor plate, and from the holes in the distributor tube The Water Level Sensor, located on the upper water flows to the cells on one side of the right side of the water sump, works in evaporator plate.
  • Page 30 NW 308/508- WIRING DIAGRAM 220 V. 50 /60 Hz. 1 ph. br = brown r = red b = blue o = orange gy = yellow / green p = purple w = white g =green bk= black y =yellow I -PC BOARD A- TERMINAL BLOCK J- MAX PRESSURE SWITCH...
  • Page 31   Page 28 NW 458/608- WIRING DIAGRAM 220 V. 50 /60 Hz. 1 ph. n = black m = brown r = red bc = blue a = orange gv = yellow / green v = purple b = white B - Compressor contactor N - Water purge valve C - Compressor...
  • Page 32   Page 28 NW 1008 - WIRING DIAGRAM 220 V. 50 /60 Hz. 1 ph. r = red m = brown a = orange bc = blue v = purple gv = yellow / green g = green b = white y = yellow n = black A - Input terminal board...
  • Page 33   Page 28 NW 1008 - WIRING DIAGRAM 380 V. 50 Hz. 3 ph. r = red m = brown a = orange bc = blue v = purple gv = yellow / green g = green b = white n = black A - Input terminal board J -High pressure controller...
  • Page 34   Page 30 SERVICE DIAGNOSIS Reference to other portions of this manual, including wiring diagrams, installation, and The table below is intended as a quick operation recommended better reference to aid the Service Agent in determine the cause of a problem. determining the cause of a particular type of malfunction, as well as the recommended repair.
  • Page 35 MAINTENANCE & CLEANING & SANITATION INSTRUCTIONS A SCOTSMAN Ice System represents a 5. Check and tighten all bolts and screws. sizable investment of time and money in any company’s business. In order to receive the 6. Check for water leaks and make corrections.
  • Page 36 250 cc - NW1008 350 cc of Scotsman Ice Machine Cleaner directly into 9. Pour hot water into the storage bin melt the the reservoir while the water inlet valve will be cubes, and to also clean the bin drain.
  • Page 37   Scotsman Ice Systems (Shanghai) Co., Ltd. Fax：0086-21-61313330 Address： Hotline：0086-4006300076 Room 2505, Building 2, No 20 Xuhong Middle Rd, Shanghai, China. 200235 E-Mail: sales@scotsman-china.com Phone：0086-21-61313200 Website：www.scotsman-china.com  ...

This manual is also suitable for:

Nw508Nw458Nw1008Nw608

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