DC33 INTRODUCTION The Scotsman DC33 is a restaurant type ice machine designed for home use. It produces the same high quality ice as large Scotsman commercial ice cube machines, and stores that ice in a heavily insulated storage bin. This service manual is intended as a resource for people installing, using, and servicing the DC33. Because it contains information on safety and maintenance, Scotsman strongly recommends that this manual be kept where it is readily available. Table of Contents Page Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation: Water ................................... 3 4 2 Plumbing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Add On Kits: Drain Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Door Kit .................................. ............................. 9 10 11 12 13 14 15 15 16 17 18 18 19 Reverse Door Swing Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Component Location ............................. Maintenance & Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . Winterizing ................................. Cleaning Ice Making System . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust Cube Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust Bin Ice Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjust Timer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Diagnosis Repair: Curtain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inlet Water Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Timer ................................... .............................. .............................. 21 21 22 23 23 24 Cube Size Control Bin Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Parts lists and wiring diagrams are located in the center of the manual, printed on yellow paper. July 1994 Page 1 This manual was printed on recycled paper. DC33 TECHNICAL INFORMATION Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of U.L., and C.S.A. 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 parts 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 designs are subject to change without notice. Model Number DC33A-1W Basic Maximum Compressor Drain Electrical Fuse Size HP Pump? 1/ 115/60/1 15 amp No 8 1/ 8 DC33PA-1W 115/60/1 15 amp Yes Add On Kits: Stainless Steel Door Panel Kit is SS33 Cool Air In Serial Number Tag Location Refrigerant Charge is = 5 ounces of R12. Warm Air Out Drain Pump Kit to convert gravity drain to pump drain is part number 12-2460-21 Overhead View of DC33 and RF33 Side By Side July 1994 Page 2 DC33 Cabinet Views DC33 INSTALLATION To properly make and store ice, the DC33 requires access to air, potable water, 115 volt electricity and a drain. The machine must be installed indoors, in a controlled environment. Air: The ice machine uses a fan to take in room air at the front of the machine through the right side of the kick plate. It discharges warm air out the left side of the kick plate. Anything placed in front of the kick plate will restrict air flow and cause a decrease in performance and efficiency. The minimum air temperature the machine will operate in is 500 F., and the maximum is 1000 F. Water Supply: The ice machine requires a continuous supply of potable water at no less than 20 p.s.i.g. of flowing pressure. Static water pressure should not exceed 80 p.s.i.g. The minimum water temperature the machine will operate in is 400 F., and the maximum is 1000 F. Water Quality: There is no such thing as "pure" water; all water, including potable water supplied by municipalities, contains some "impurities". Water absorbs impurities from the air as rain and/or as it flows through the ground. Some of the impurities are solid particles, these are known as suspended solids, and a fine particle filter will remove them. Other impurities are chemically bonded to the water molecules, and cannot be filtered out, these are called dissolved solids. Ice made by the DC33 will have a lower mineral content than the water it was made from. Purer water will freeze first in the ice making molds. The reason for this is that anything dissolved in water lowers the water's freezing temperature. This concentrates most of the impurities in the ice machine water reservoir where they may form hard deposits known as scale. The DC33 dilutes the concentration of minerals by over-filling the reservoir during the harvest cycle (with the excess water flowing down the drain). About 3 quarts of water flow into the unit each cycle. About 1 quart of that rinses the reservoir and goes down the drain. Some impurities will inevitably remain, and will stick to the parts in the machine, and will cause malformed ice cubes. Eventually, built up mineral scale can shorten machine life. To keep the machine operating properly, these impurities or minerals will have to be regularly dissolved by an acid cleaning, using Scotsman Ice Machine Cleaner. Directions for this may be found in the section under cleaning. In general, it is always a good idea to filter the water. A water filter, if it is of the proper type, can remove taste and odors as well as particles. Some methods of water treatment for dissolved solids include reverse osmosis, and polyphosphate feeders. A reverse osmosis system should include post treatment to satisfy the R.O. water's "aggressiveness". Deionized water is not recommended. Because water softeners exchange one mineral for another, Scotsman does not recommend their use for ice machines. Where water is very hard, softened water may result in white, mushy cubes that stick together. Scotsman suggests, that if in doubt about the water, that a local point of use water specialist be contacted for recommendations on water treatment. Electricity: The machine is supplied with a cord, and may be plugged into a wall outlet. The ice machine should be the only device using that circuit. The fuse (or circuit breaker) size should be 15 amps. Drain: There are two DC33 models: The DC33A-1W is a gravity drain model that requires a drain tube that's pitched down from the outlet at the back of the cabinet to the connection to the sanitary sewer. The DC33PA-1W has a built in drain pump that will pump water up to a drain point, such as a nearby sink. July 1994 Page 3 DC33 TO INSTALL: Plumbing The water supply and drain should be roughed in and ready at the point of installation. A wall outlet directly behind the ice machine will make undercounter installation easier. All electrical, water and drain connections must conform to local codes. Installation Cautions: Although the DC33 has been designed to be serviced in place, in some cases it may be necessary to pull the unit out for service. For that reason do not restrict access to the cabinet at the front - top and bottom. Install Unit Flush With Floor Installations on a slab: Use a pump (DC33PA-1A) model and pump the water to the point of drainage. Pump models will pump 1 story high. Installations over a crawl space or basement: Either gravity drain or pump model units may be used, if there is not enough room behind the machine for a drain/waste receptacle, the drain will have to be below the floor. ALL PLUMBING MUST MEET LOCAL CODES Shims If a floor is to be installed after the ice machine, shims the thickness of the floor should be installed under the DC33 to keep the machine level with the floor. Also, allow 1/8" clearance on each side of the cabinet. From Ice Machine Normal Drain Line, Pitched Down From Ice Machine Good Draining With Trap, Causes Poor Draining Poor Draining With Trap And Vent, Draining Is Normal To Drain Good Draining EXAMPLES OF GRAVITY DRAIN TUBE INSTALLATIONS July 1994 Page 4 DC33 TO INSTALL: Plumbing Free Standing Cabinet, Gravity Drain Model: All horizontal runs of drain lines must have a 1/4" per foot fall. An air gap will likely be required between the ice machine drain tube and the drain/waste receptacle. A stand pipe with a trap below it would be acceptable for the drain/waste receptacle. A floor drain is also acceptable. FOLLOW ALL LOCAL PLUMBING CODES Schematic Side View of Drain System, Use Began June 1994 5. Route the drain tube from the back of the machine to the front and connect to the bin drain tube. Secure with hose clamps. On units built after serial number 735675-12Z June 1994: When replacing an exisiting gravity drain unit where a 5/8" drain line (hose) was used, the hose must be replaced by one which is a 1/2" I.D. Failure to do this may result in a loose connection and water leak. Be certain that the 1/2" I.D. drain hose is pushed up well past the barbs on the drain fitting. If needed to ease installation, soak the drain hose in hot water just before connecting to the fitting. 6. Route a drain line from the ice machine to the drain/waste receptacle. Note: if using a long horizontal run (more than 5') the drain should be vented at back of cabinet. Reservoir 7. Turn on the water supply and check for leaks. 8. Replace the kick plate. 9. Level the unit using the leg levelers. Internal Reservoir Drain Hose Drain hose was behind the bin prior to serial number 735675-12Z. Gravity Drain: Connect 1/2" I.D. Drain Hose Here Poor draining will cause a high rate of ice melting in the bin. 1. Remove the kick plate. 2. Route the water supply, which should be a 1/4" O.D. copper tube through the back of the cabinet to the front. 3. Install a flare nut and flare the end of the tube. 4. Flush the water line and fasten the flare nut to the male flare on the inlet water valve. Drain Detail Up To 735675-12Z (June 1994) July 1994 Page 5 Water Filter (Recommended) Shut Off Valve Floor Drain Water Inlet Connection Detail INSTALLATION OF WATER AND DRAIN DC33 TO INSTALL: Plumbing Free Standing Cabinet, Pump Model: 1. Remove the kickplate and control box cover. 2. Route the water supply, which should be a 1/4" O.D. copper tube through the back of the cabinet to the front. 3. Install a flare nut and flare the end of the tube. 4. Flush the water line and fasten the flare nut to the male flare on the inlet water valve. 5. Locate the coil of plastic tubing shipped in the storage bin. 6. Connect the coiled tubing to the discharge port of the drain pump. 7. Route the discharge line from the drain pump to the drain point connection. Do not connect to a drain/waste line below a trap. Connect the discharge line to the drain, per local codes. An air gap will likely be required between the ice machine drain tube and the drain/waste receptacle. 8. Turn on the water and plug in the ice machine. Pour in a couple quarts of water, the drain pump should start. Check for water leaks. 9. Replace the kickplate and control box cover. 10. Level the unit using the leg levelers. ALL PLUMBING MUST MEET LOCAL CODES THE DC33 WILL FIT IN A SPACE 151/4" WIDE X 333/4" HIGH. THE DEPTH OF THE CABINET IS 22" TO THE FRONT EDGE OF THE HANDLE. Air Gap Device (Where Required) Drain Connection WATER AND DRAIN INSTALLATION Drain Tube From Back Of Machine Water Shut Off Valve Water Filter (Recommended) Water Inlet Connection July 1994 Page 6 DC33 TO INSTALL: Plumbing Built In, Gravity Drain Model: The drain and inlet water tubes must be plumbed before connecting to the ice machine. All horizontal runs of drain lines must have a 1/4" per foot fall. An air gap will likely be required between the ice machine drain tube and the drain/waste receptacle. A stand pipe with a trap below it would be acceptable for the drain/waste receptacle. Note: Poor draining will cause a high rate of ice melting in the bin. 7. Cut off water inlet line at required length. 8. Flush water line. Place flare nut on inlet water line and flare the end of the copper tube. 9. Attach flare nut to the male flare on the inlet water valve. 10. Cut off the drain tube to the required length. 11. Connect the drain tube to the drain fitting at the front of the cabinet. Use hose clamps to secure tubes to fittings. On units built after serialn number 735675-12Z Schematic Side View June 1994: When replacing an exisiting gravity of Drain System, Use drain unit where a 5/ " drain line (hose) was used, 8 Began June 1994. 1 the hose must be replaced by one which is a /2" I.D. Failure to do this may result in a loose connection and water leak. Reservoir Be certain that the 1/2" I.D. drain hose is pushed u ...