MF400 INTRODUCTION To the owner or user: The service manual you are reading is intended to provide you, and the maintenance or service technician with the information needed to install, start up, clean, maintain, and service this ice system. TABLE OF CONTENTS For the Installer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 Location/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4 For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5 For the Electrician Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6 Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8 Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9 Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15 Maintenance & Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13 Service Diagnosis Removal and Replacement Ice Breaker and Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17 Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17 Gearmotor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18 Parts lists and wiring diagrams are located in the center of this manual, printed on yellow paper. May, 1991 Page 1 MF400 FOR THE INSTALLER The MF400 is designed to fit the following Scotsman storage bins. BH550 with bin top KBT20 HTB500 with bin top KBT20 The normal finish for the machine is enamel sandalwood. An optional stainless steel panel kit (SPKMF400A) may be ordered and field installed to convert the unit to a stainless steel finish. When installing the new system, check that everything needed is on site: Correct Ice Machine (voltage and type) Correct Bin Correct Bin Top Legs for the bin 1 -7/16" 21" SPECIFICATIONS : Condenser Drain 3/8" O.D. Tube (Water Cooled) Condenser Inlet, 3/8" O.D. Tube (Water Cooled) Electrical ICEMAKER Note: This service manual is Inlet for the current MF400 "B" model, but applies in general to the prior "A" model. The primary differences are in the evaporator, spout and 2.5" the ice chute. Water Inlet 1/4" Male Flare 3.5" 2" 8" 9.5" Drain 7/16" I.D. Hose Model Number Dimensions (w/o Bin) H" x W" x D" 21.5 x 21 x 22 same Basic Electrical Condenser Type Minimum Circuit Ampacity+ 12.7 11.4 Maximum Fuse Size MF400AE-1B MF400WE-1B 115/60/1 same Air Water 15 15 *Minimum Circuit Ampacity is used to determine wire size and type per National Electric Code. May, 1991 Page 2 MF400 FOR THE INSTALLER Installation Limitations: This ice system is designed to be installed indoors, in a controlled environment: Min Max 0 Air Temperature 50 F. 1000F. Water Temperature 400F. 1000F. Water Pressure 20 psi 80 psi Voltage -10% +10% (Compared to the Nameplate) Operating the machine outside of the limitations is misuse and can void the warranty. Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meed 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 changes are subject to change without notice. Water Limitations: An ice machine is a food manufacturing plant; it takes in a raw material, water, and turns it into a food product, ice. The purity of the water is very important in obtaining pure ice and in maximizing product life. This section is not intended as a complete resource for water questions, but it does offer these general recommendations: 1. Filter the water used to make ice. That is the water going to the "potable" water connection. Water filters vary greatly in ability and function. Install one that filters out suspended solids to a dimension of 5 microns or smaller. The finer the filter the better, but finer filters will clog sooner that course ones. It may be necessary to add a course filter ahead of the fine filter to prolong filter life. 2. Check with a water treatment specialist for a water test, and recommendations regarding filters and treatment. Service Limitations: There must be space above, to at least one side, to the back, and of course the front for service access. May, 1991 Page 3 MF400 FOR THE INSTALLER 6. Push the ice chute against the stainless spout Location (the end of the spout will go into the chute). After uncrating and inspection, the unit is ready to 7. Slide the rubber cap over the top of the stainless be installed. spout. Push down until it fits tightly around the It is important that the machine be installed in a spout. location where it has enough space around it for 8. Secure the rubber cap to the spout with the two service, and a minimum of 6" be allowed all sides hose clamps, in the molded grooves; one above for air circulation. The machine, when air cooled, and one below. Keep hose clamp screws away draws air in the front, and exhausts it out the sides from evaporator. and back. 9. Attach the insulation halves around the top of Try to avoid hot, dirty and crowded locations. Be the evaporator. Secure with the ty-wrap provided. sure that the location for the machine is within the Finish installation per service manual. limitations described on page 3. Storage Bin HOSE CLAMP Tip the uncrated storage bin on its back, using parts of the carton to protect the exterior finish. Install the legs into the threaded holes in the RUBBER CAP bottom of the bin. Turn the leg levelers all the way in preparation for leveling later. MOLDED Return the bin to the upright position, remove GROVES paper covering the bin gasket. HOSE CLAMP Install bin top if required. Note: Do not push bin into position: but lift it there. Pushing a bin, especially one with ice in it, ICE CHUTE can cause damage to the legs and the leg mounts. METAL ICE SPOUT Ice Maker The machine is heavy, so the use of a mechanical lift is recommended for lifting the machine high enough to install on top of the bin. After the machine is placed on the bin, line it up so that the ice discharge opening in the base of ICE CHUTE INSTALLATION the machine is over the open hole in the bin top. Ice Chute Installation After the MF400B has been installed on the ice storage bin, the ice chute needs to be installed: HOSE 1. With the top panel off, remove all packing CLAMP RUBBER material (bubble pack) from above the ice chute CAP METAL SPOUT and chute cap. Cut the ty-wrap holding the chute assembly in place. 2. Remove the insulation halves and ty-wrap packed inside the cabinet, retain for later use. 3. Remove the cardboard support from under the ice chute. 4. Insert the ice chute/bin thermostat assembly into the large hole in the bottom of the ice machine. Check that bin thermostat cap tube is free from contact with most components. 5. Remove the rubber cap from the top of the ice HOSE CLAMP chute. Leave one hose clamp on the chute. May, 1991 Page 4 ASSEMBLED VIEW MF400 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled: The recommended water supply is cold water. Use 1/4" O.D. copper tubing, connect to the 1/4" male flare at the back of the cabinet. Install a hand valve near the machine to control the water supply. Water Cooled: A separate 3/8" O.D. copper tube should be connected to the condenser inlet, with a separate hand valve to control it. Drains Air cooled: There is one 7/16" I.D. hose to connect to for a drain. This drain is a gravity drain, and a minimum of 1/4" per foot fall is needed for horizontal portions of the drain CONDENSER line. WATER INLET The ideal drain receptacle is a (Water Cooled) trapped and vented floor drain. Use only rigid tubing. Water Cooled Models: In addition to the above mentioned drain, separate condenser drain must be installed. Connect to the 3/8" condenser drain tube. Storage Bin: A separate gravity type drain needs to be run. This drain line should be insulated. OVERFLOW DRAIN POTABLE WATER INLET WATER FILTER (FIELD SUPPLIED) CONDENSER DRAIN (Water Cooled) BIN DRAIN FLOOR DRAIN GRILL May, 1991 Page 5 MF400 FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES The electrical power to the unit is to be wired through the cabinet to the control box. In the control box, connect to the terminal strip provided. Check the nameplate (located on the back of the cabinet) for the voltage requirements, and for the minimum circuit ampacity. The machine requires a solid chassis to earth ground wire. The icemaker should be connected to it's own electrical circuit so that it is individually fused. Voltage variation must remain within design limitations, even under starting conditions. All external wiring must conform to national, state, and local electrical codes. The use of e licensed electrician is required to perform the electrical installation. ELECTRICAL POWER SUPPLY CONNECT ELECTRICAL POWER TO ICEMAKER THROUGH ELECTRICAL INLET HOLE AND INTO CONTROL BOX May, 1991 Page 6 MF400 FOR THE INSTALLER: Final Check List 1. Is the ice system installed indoors in a location where the air and water temperatures are controlled, and where they do not exceed the design limitations? 2. Is there an electrical service disconnect within sight of the installed machine? 3. Have all the plumbing connections been made and checked for leaks? 4. Has the machine and bin been leveled? 5. Is there a minimum of 6" clearance around the machine for proper service and air circulation? 6. Is the water pressure a minimum of 20 psig? 7. Has the ice discharge tube been installed? 8. Is there a water shut off installed near the machine? 9. Have all shipping materials been removed? Electrical Power? Leveled? Water Supply? Drains? May, 1991 Page 7 MF400 START UP 1. Remove screws and the front panel. 2. Open the water shut off valve. 3. Observe that the water flows into the water reservoir, fills up the water inlet tube to the evaporator, the float moves up with the water level, and the float shuts off the water flow, about 3/8" below the molded horizontal line on the water reservoir. 4. Switch on the electrical power to the unit. 5. Switch the master switch to ON. 6. After a few minutes of operation: water should begin to flow from the reservoir to the evaporator; the air cooled condenser should begin to discharge warm air, or the water cooled condenser should beginning to discharge warm water; and the unit should begin to drop ice into the storage bin. If desired, the refrigeration pressures can be checked: · The air cooled discharge pressure should be about 125-135 PSIG and the suction pressure should be about 12-15 PSIG. · The water cooled discharge pressure should be set at 135 PSIG. · Gearmotor amps should be about 2.8 - 3.2. · Compressor amps should be about 8.5 - 9. 7. Let the unit operate for 15-30 minutes, checking for water leaks, or excessive noise from vibrating components. 8. Block off the ice discharge tube, and check if the bin thermostat shuts off the machine. After it shuts off the compressor, the auger motor should run for a few minutes more. Allow the ice in the tube to fall away, and check that the compressor restarts. 9. Explain the operation and maintenance requirements to the user, inform the user of the telephone number of the service agency servicing the machine, and give the user the service manual. May, 1991 Page 8 MF400 COMPONENT LOCATION: Control Box Auger Delay Pressure Control: This pressure switch, connected to the low side of the refrigeration system, controls the auger drive motor. Low Pressure Control: This pressure switch, connected to the low side of the refrigeration system, is normally closed when the machine is operating. If the low side pressure should drop too low, the control will open (at 0-4 PSIG), stopping the ice maker. It is an automatic reset. High Pressure Control: The pressure switch, used on water cooled models only, is designed Low Pressure to open and shut off the machine Control should the high side refrigeration pressure become too high, usually as a result of not enough water through the water cooled condenser. It is a manual reset. On-Off switch: This toggle switch shuts off the machine. It is not a complete disconnect. Bin Thermostat: This thermostat turns the machine on and off in response to changes in temperature of the capillary tube. It opens at 350 F. and closes at 450 F. The capillary tub ...