SCE170 Introduction To the owner or user: This service manual is intended to provide you, and the maintenance or service technician, with the information needed to install, start up, clean, maintain and repair this product. The SCE170 is an ice machine that produces cubed ice on a grid type freezing surface. The cubes form into a cluster that falls into the ice storage bin where they break up into individual and small groups of cubes. The SCE170 automatically maintains the level of ice by turning on when the ice level falls, and switches off when the bin is full. This unit is serviceable in place; the ice storage bin and hood may be removed from the chassis to allow service access without removing the ice machine from its installed position. The refrigeration system uses HP62 as the refrigerant. Table of Contents Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 For The Installer: Environmental Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Removal of the Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Sanitzing and Water System Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Water Schematic: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Refrigeration Schematic: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Technical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Removal and Replacement: Cube Size Control . . . . . . . . . . . . . . . . . . . . . . . . . 22 Removal and Replacement: Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Removal and Replacement: Float Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Removal and Replacement: Curtain & Bin Control . . . . . . . . . . . . . . . . . . . . . . . . 25 Removal and Replacement: Purge Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Refrigeration System Service: HP62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Parts lists and wiring diagrams are located in the center of this manual, printed on yellow paper. 6JKUOCPWCNYCURTKPVGFQPTGE[ENGFRCRGT October 1998 Page 1 SCE170 Specifications The unit is equipped with an electrical power cord, but should only be plugged into a circuit dedicated to the ice machine. THE NAMEPLATE IS LOCATED ON THE BACK PANEL. A SERIAL NUMBER PLATE IS LOCATED BEHIND THE RIGHT FRONT PANEL, ON THE BASE IN FRONT OF THE CONTROL BOX Serial Number Plate (Behind Grill) Model Number "Half-Dice" Cube SCE170A-1C SAME SAME SAME Air SCE170W-1A SAME SAME SAME Water SCE170W-1C SAME SAME SAME Water SCE170A-6C same 230/50/1 SAME Air SCE170W-6C same 230/50/1 SAME Water Note: A scoop and legs are included. Power Cord Supplied. June 2002 Page 2 Dimensions (w/o) legs H" x W" x D" SCE170A-1A 33 x 241/4 x 24 Basic Electrical 115/60/1 Ice Type Condenser Total Type Load Amps Air 10 10 10 10 5 5 Total Wattage Refrigerant HP62 (R-404a) see page 18 see page 18 see page 18 see page 18 see page 18 see page 18 1150 1150 SCE170 For The Installer: Environmental Limitations The ice machine must be installed indoors in a controlled environment. Minimum Air Temp Water Temp Water Pressure Voltage 50 F. 400F. 20 PSI 103.5 0 Maximum 1000F. 1000F. 80 PSI 126.5 Air Out Air In Operating the ice machine outside of the above limitations, or outdoors, is potentially damaging to the machine, and it is misuse of the machine. This may void the warranty. Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of UL, NSF, and CSA. Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way, including the use of any part and/or other components not specifically approved by Scotsman. Scotsman reserves the right to make design changes and/or improvements at any time. Specifications and design are subject to change without notice. Airflow on air cooled models is: ·Intake through the right front grill. ·Exhaust through the left front grill. Do not install where this air flow is obstructed. The SCE170 has a removable cabinet. When installed, the machine should have some extra clearance (1/8") on the left and right sides so that the cabinet may be easily removed when the machine is in place. October 1998 Page 3 SCE170 Installation Water The water supply for this ice machine has been in contact with many materials since it fell from the sky as rain. All rain is slightly acidic, and tends to dissolve the materials it comes in contact with. During water's journey to the ice machine, it has flowed over and through the ground, been picked up by a municipal or private pump, forced through a series of pipes of differing construction and may have been treated by the municipality providing the water. The water supplied to this ice machine will then contain a variety of substances that will likely show up as solids during the ice making process. These solids are similar to those found when water is boiled out of a saucepan. Only the water boils away, and the minerals that were in the water solidify in the pan. During ice making only the water is frozen into ice, the minerals stay behind in the reservoir. This machine pumps out the water in the reservoir every cycle to minimize the amount of minerals in the water system, but after time the minerals will appear and have to be dissolved by ice machine cleaner, then flushed away during the cleaning process. An ice machine is a food manufacturing plant; it takes a raw material, in this case water, and transforms it into a food product, ice. The purity of the water is very important in obtaining pure ice and in maximizing product life. The water to the ice machine should be filtered. Water filters vary greatly in ability and function. Install one that filters out suspended solids to a dimension of 5 microns or less. The finer the filter the better, but finer filters may plug-up sooner than course ones. It may be necessary to add a course filter ahead of the fine filter to prolong filter life. Have the water tested. Acidic water or alkaline water will both cause corrosion. Dissolved solids cannot be filtered out. Check with a water treatment specialist regarding testing, treatment and filters. This ice machine may be installed in the open or under a counter. No clearance is required at the sides or top beyond what's needed to place the cabinet into position. Air cooled models blow air in and out through the grills at the front. Space is required for utility connections at the back. The ice machine is not designed for outdoor use. It must be installed indoors, in a controlled environment. The air and water temperatures must not exceed rated limits. Electrical power is supplied through a cord connected to the unit. All local codes must be followed. Pre-installation: 1. Inspect the place where the ice machine is to be installed. Check for: ·space for the cabinet, ·water supply, ·drain availability ·and electrical power supply. No extension cords are allowed. The building drain inlet must be lower than the drain outlets at the back of the ice machine. The water supply must have a hand shut off valve accessible when the unit is installed. 2. Determine the method of installation, is the machine to be installed under the counter? Is the drain in the floor under the machine? Is the water inlet valve accessible? October 1998 Page 4 SCE170 Installation For The Plumber 1. Connect cold potable water to the 3/8" male flare at the top back of the cabinet. A water filter is recommended. Flush the water line prior to connecting to the ice machine. If water cooled, connect a separate water inlet line to the water cooled condenser inlet fitting. It should also have a hand shut off valve. A loop of copper tubing may be used between the ice machine and the water supply. This will allow the ice machine to be pulled out from its installed location without disconnecting the water line. No back-flow preventer should be needed in the inlet potable water line because provision for that is incorporated in this N.S.F. listed product (the float seat is above the reservoir wall and cannot siphon). 2. Connect a drain tube to each drain. The drain tubes from these connections must be run separately. There are two connections at the back of the cabinet, one is the bin drain and the other is the purge drain. Both are 3/4" F.P.T. brass fittings. Bin Drain Vent Drain tube material must be rigid and meet local code. Traps in the bin drain line without vents ahead of them will cause poor draining. The bin drain must be vented if there is a long horizontal run (5' or more). The purge drain must also be vented. All drains are gravity, and must have a minimum fall of 1/4" per foot of horizontal run. The water cooled condenser drain should not be vented, and is routed separately. Maintain the air gap required by local code between the end of the drain tubes and the building drain receptacle. Note: Drain tubing should be insulated to prevent condensation from forming on the tubing. CONFORM TO ALL LOCAL CODES Note: The unit is designed for drain connections on the outside of the cabinet. To connect the drains inside would require the removal of the drain fittings attached to the back panel, and field fabricated drain tubes routed inside the base of the unit. Purge Valve Drain Vent Potable Water Inlet Bin Drain Water Cooled Plumbing Connections Floor Drain Air Cooled Plumbing Connections Purge Valve Drain Vent Bin Drain Vent Note: Recommended Drain Vent Vertical Tube Length is 24" Bin Drain Potable Water Inlet Condenser Drain Condenser Water Inlet October 1998 Page 5 Purge Drain SCE170 Installation For The Electrician This is a cord-connected unit, and must be on a separate 115 volt AC 60 cycle single phase power supply. The maximum fuse size for this circuit should be 15 amps, per the nameplate use fuses, or HACR circuit breakers. Follow All Local Codes - This Unit Must Be Grounded. Do not use extension cords and do not disable or by-pass ground prong on electrical plug. After Utility Connections: 1. Level the cabinet, use the leg levelers on the end of the legs to adjust the cabinet height. (Legs should have been installed when the unit was unpacked). 2. Wash out the bin and hood. If desired, the interior of the bin could be sanitized. 3. Locate the scoop, wash it and have it available for use when needed. Final Check List 1. Is the ice maker cabinet in a room where ambient temperatures are within the minimum and maximum temperatures specified? 2. Has the water supply been connected? 3. Is the water pressure adequate? 4. Have the water connections been checked for water leaks? 5. Have the drain connections been made? 6. Have the drain connections been checked for leaks? 7. Is the cabinet level? 8. Is the ice machine plugged into a 115 volt electrical power supply and is the ice machine the only load on that circuit? 9. Has all of the shipping material been removed from the inside of the cabinet? 10. Has the bin and cabinet been wiped clean and sanitized? 11. Has the Customer Evaluation & Warranty Registration form been filled out? Check for correct model and serial numbers from the nameplate, then mail the completed form to Scotsman. 12. Has the owner/user been given the name and telephone number of the authorized Scotsman Service Agency serving that location? 13. To start up machine, follow the directions on page 10. For more information on the unit, turn to the next page. October 1998 Page 6 SCE170 Removal of the Cabinet One of the most useful features of this ice machine is the ability to remove the cabinet from the ice machine without removing the ice machine from its installed position. To Remove: 1. Switch the master switch to OFF. Be certain the ice machine has been switched off. 2. Open the bin door and unscrew the knobs at the left and right inside of the ice storage bin. Unscrew the knobs all the way out. 3. Pull the ...