Related Manuals for Scotsman AC 105
Summary of Contents for Scotsman AC 105
- Page 1 SERVICE MANUAL AC 105 R 134 A / R 404 A VERSIONS Electronic cubers with storage MS 1000.08 REV. 09/99...
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Page 2: Table Of Contents
Page 01 Table of contents page TABLE Specifications AC 105 OF CONTENTS GENERAL INFORMATION AND INSTALLATION Introduction Unpacking and Inspection Location and levelling Electrical connections Water supply and drain connections Final check list Installation practice OPERATING INSTRUCTIONS Start up Operational checks... -
Page 3: Specifications Ac 105
The daily ice-making capacity is directly related to the condenser air inlet temperature, water temperature and age of the machine. To keep your SCOTSMAN CUBER at peak performance levels, periodic maintenance checks must be carried out as indicated on page 26 of this manual. - Page 4 HEIGHT (without legs) 813 mm. HEIGHT (with legs) 950 mm. WIDTH 535 mm. DEPTH 534 mm. WEIGHT 44 Kgs. AC 105 - CUBER MACHINE SPECIFICATION Ice bin cap. Water requirem Model Cond. Finish Comp. HP Kgs. LTx24 HR AC 105 AS...
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Page 5: General Information And Installation
Cut and remove the plastic strip securing misuse under the terms of the SCOTSMAN the carton box to the skid. Manufacturer’s Limited Warranty resulting in LOSS or warranty coverage. -
Page 6: Electrical Connections
All SCOTSMAN icemakers require a solid earth wire. All SCOTSMAN ice machines are supplied from WATER DRAIN the factory completely pre-wired and require only electrical power connections to wire cord provided The recommended drain tube is a plastic or at the rear of the unit. -
Page 7: Installation Practice
Page 6 12. Has the owner been given the name and the 11. Has the water supply pressure been phone number of the authorized SCOTSMAN checked to ensure a water pressure of at least 1 Service Agency serving him? bar (14 psi). -
Page 8: Operating Instructions
Page 7 OPERATING INSTRUCTIONS START UP sump reservoir to fill it up and also that the incoming surplus of water flows out through the After having correctly installed the ice maker and overflow pipe into the drain line. completed the plumbing and electrical During the water filling phase the components connections, perform the following “Start-up”... -
Page 9: Operational Checks
Page 8 At completion of the water filling phase In case of condenser clogging such to prevent (5 minutes) the unit passes automatically into the the proper flow of the cooling air or, in case freezing cycle with the start up of: the fan motor is out of operation or shortage COMPRESSOR of water in the water cooled condenser, the... - Page 10 Page 9 FIG. 3 WATER DRAIN VALVE - EVAPORATOR WATER IN VALVE SWITCH - CONDENSER ELECTR. HOT GAS VALVE TIMER - AMBIENT CONTACTOR COIL RELAYS FAN MOTOR TRIAC TRANSF. WATER PUMP RELAY ELECTRONIC CARD Check to see through the ice discharge interior of the inverted mold cups;...
- Page 11 Page 10 The ice making process takes place thereby, After about 17÷20 minutes from the begin- with the water sprayed into the molds that gets ning of the freezing cycle, in an hypothetic gradually refrigerated by the heat exchange with ambient temperature of 21°C, the defrost cycle the refrigerant flowing into the evaporator takes place with the hot gas, the water inlet...
- Page 12 Page 11 of the FOURTH YELLOW LIGHT indicating UNIT Check the texture of ice cubes just released. They have to be in the right shape with a small IN OPERATION and the extinguishing of the “BIN FULL” YELLOW LIGHT. depression of about 5-6 mm in their crown. If not, wait for the completion of the second cycle before performing any adjustment.
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Page 13: Freezing Cycle
Page 12 PRINCIPLE OF OPERATION How it works In the SCOTSMAN cube ice makers the water NOTE. The change of the electric potential of used to make the ice is kept constantly in the evaporator sensor with the consequent circulation by an electric water pump which primes... - Page 14 Page 13 FIG. B FIG. A FIG. A FIG. C FIG. C FIG. D...
- Page 15 Page 14 FIG. E FIG. A FIG. F FIG. C FIG. G FIG. H...
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Page 16: Harvest Cycle
Page 15 and between 9.5 and 10.5 bar (135÷150 psig) in DEFROST OR HARVEST CYCLE (Fig.E and G) the water cooled version, being controlled by the As the electronic timer has carried the system temperature sensor probe located within the throughout the second phase of freezing cycle, condenser fins (air cooled version) or, on the the defrost cycle starts. -
Page 17: Control Sequence
Page 16 OPERATION - CONTROL SEQUENCE TIMED FREEZE At the start of freezing cycle the evaporator Electrical components (Loads) temperature sensor controls the length of the first • Compressor ..........part of the freezing cycle. As it reaches a • •... -
Page 18: Component Description
Page 17 COMPONENTS DESCRIPTION OPERATING CHARACTERISTICS EVAPORATOR TEMPERATURE AC 105 SENSOR The evaporator temperature sensor probe, Freeze Cycle located in contact with the evaporator serpentine, detects the dropping of the evaporator tempera- Average Discharge ture during the freezing cycle and signals it by Pressure A/C: 9.5÷8.5 bar (130÷110 psig) - Page 19 Page 18 When the light beam is interrupted the RED LED RE-SET/HI TEMPERATURE. To be selected to resume the unit operation when the ice maker located in the front of the P.C. BOARD goes off; shuts off due to the intervention of the condenser in case the light beam is constantly interrupted temperature sensor (too high condensing tem- for more than 60 seconds, the ice machine stops...
- Page 20 Page 19 freezing cycle (controlled by the electronic The DIP SWITCH first four keys setting timer) as detailed in the table B. determines the length of the 2nd phase of TAB. B LENGTH OF TIMED PORTION OF FREEZING CYCLE ACCORDING TO THE DIP SWITCH SETTING COMBINATIONS The DIP SWITCH keys 5 &...
- Page 21 Page 20 condenser fins. In the second part of the freezing refrigerant system by energizing the coil of the water inlet solenoid valve that control the cooling cycle, the fan motor can run at intermittance as water flow to the condenser. the condenser pressure must be kept between two corresponding head pressure values.
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Page 22: Adjustment Of The Cube Size
Page 21 ADJUSTMENT PROCEDURES ADJUSTMENT OF THE CUBE SIZE CAUTION. Before performing actual adjustment of the cube size , check other possible causes for cube size problems, refer to the Service Diagnosis Section for problem review and analysis. Do not perform any adjustment till the icemaking system has progressed SMALL through several complete freezing and... -
Page 23: Wiring Diagram
Page 22 WIRING DIAGRAM AC 105 - AIR AND WATER COOLED 230/50/1... -
Page 24: Service Diagnosis
Shortage of refrigerant Check for leaks & recharge Inoperative evaporator sensor Replace sensor Cloudy cubes Shortage of water See remedies for shortage of water Dirty water supply Use water softner or water filter Accumulated impurities Use SCOTSMAN Ice Machine cleaner... - Page 25 Page 24 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Shortage of water Water spilling out through curtain Check or replace curtain Water solenoid valve not opening Replace valve Water leak in sump area Locate and repair Water flow control plugged Replace water inlet valve Leak of water drain valve Replace valve...
- Page 26 Page 25 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Unit won’t harvest Inoperative P.C.Board Replace P.C.Board Hot gas valve not opening Valve coil with open winding Replace valve Water solenoid valve not opening Valve coil with open winding Replace valve Incorrect discharge pressure Inoperative condenser sensor Replace sensor...
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Page 27: Maintenance And Cleaning Instructions
Clean the water system, evaporator, bin Check the ice level control sensor to test and spray jets using a solution of SCOTSMAN shut-off. Put your hand between the light source and the receiver so to cut off the light beam for at Ice Machine Cleaner. -
Page 28: Cleaning Instructions Of Water System
"eyes" with a clean soft cloth. Prepare the cleaning solution by diluting in a plastic container two liters of warm water (45°- 50°C) with a 0,2 liters of SCOTSMAN Ice Machine Cleaner. WARNING. The SCOTSMAN Ice Machine Cleaner contains Phosphoric Hydroxyacetic acids. - Page 29 Page 28 Remove the evaporator cover then slowly Sanitation pour onto the evaporator platen the cleaning solution. With the help of a brush dissolve the most resistant and remote scale deposits in the NOTE. Sanitation of the water system is platen.
- Page 30 I C E S Y S T E M S SCOTSMAN - EUROPE Via Puccini, 22 - 20010 Bettolino di Pogliano (Milano) Italy Tel. +39-2-93.96.02.08 - Telefax +39-2-93.55.05.00 Direct Line to Service & Parts: ISO 9001 - Cert. n° 0080...