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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.
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location/Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance & Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ice Breaker and Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Gearmotor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts lists and wiring diagrams are located
in the center of this manual, printed on
yellow paper.
TABLE OF CONTENTS
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May 1994
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MFE400
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Page 4
Page 5
Page 6
Page 7
Page 8
Page 9
Page 10
Page 11
Page 13
Page 15
Page 17
Page 17
Page 18
Page 20
Page 21
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Related Manuals for Scotsman MFE400
Summary of Contents for Scotsman MFE400
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Page 1: Table Of Contents
Refrigeration ........Parts lists and wiring diagrams are located in the center of this manual, printed on yellow paper. TABLE OF CONTENTS May 1994 Page 1 MFE400 Page 2 Page 4 Page 5 Page 6 Page 7 Page 8... -
Page 2: For The Installer
MFE400 FOR THE INSTALLER The MFE400 is designed to fit the following Scotsman storage bins. BH550 with bin top KBT20 HTB555 with bin top KBT20 When installing the new system, check that everything needed is on site: Correct Ice Machine (voltage and type) - Page 3 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...
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Page 4: Location/Assembly
Ice Chute Installation After the MFE400 has been installed on the ice storage bin, the ice chute needs to be installed: 1. With the top panel off, remove all packing material (bubble pack) from above the ice chute and chute cap. -
Page 5: For The Plumber
Storage Bin: A separate gravity type drain needs to be run. This drain line should be insulated. POTABLE WATER INLET CONDENSER WATER INLET (Water Cooled) WATER FILTER (FIELD SUPPLIED) CONDENSER DRAIN (Water Cooled) BIN DRAIN September 2005 Page 5 MFE400 OVERFLOW DRAIN FLOOR DRAIN GRILL... -
Page 6: For The Electrician
MFE400 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. 1. Remove the front, top and right side panels. -
Page 7: Final Check List
MFE400 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. -
Page 8: Start Up
MFE400 INITIAL 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,... -
Page 9: Component Description
MFE400 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. High Pressure Control: The pressure switch, used on water cooled models only, is designed to... -
Page 10: Electrical Sequence
MFE400 ELECTRICAL SEQUENCE There are two circuits in the MFE400: one is a series circuit with several switches connected in series to the compressor. The other is a parallel branch of the series circuit, controlling the gear drive motor. The series circuit begins at the terminal strip in the control box. -
Page 11: Operation
WATER RESERVOIR - FLOAT VALVE PRESSURE SWITCH WATER INLET RESERVOIR OVERFLOW DRAIN AUGER DRIVE MOTOR WATER SEAL ICE AND WATER SCHEMATIC "B" MODEL May 1994 Page 11 MFE400 SAFETY SWITCH SPOUT CHUTE THERMOSTAT BRACKET... - Page 12 MFE400 OPERATION: Refrigeration Beginning at the compressor, the refrigerant is compressed into a high temperature gas. The discharge line directs this gas to the condenser. At the condenser (air or water cooled) the gas is cooled by either air or water and it then condenses into a liquid.
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Page 13: Maintenance & Cleaning
MAINTENANCE AND CLEANING A Scotsman Ice System represents a sizable investment of time and money in any company’s business. In order to receive the best return for that investment, it MUST receive periodic maintenance. It is the USER’S RESPONSIBILITY to see that the unit is properly maintained. It is always preferable, and less costly in the long run, to avoid possible down time by keeping it clean;... -
Page 14: Maintenance And Cleaning
3. Inspect the auger and the water seal. Clean the auger of any mineral build up. Scotsman Ice Machine Cleaner and a scouring pad work well to clean the auger. DO NOT USE steel wool. -
Page 15: Service Diagnosis
Centrifugal switch open Auger delay switch open Auger does not turn Low system charge Compressor off Overuse May 1994 Page 15 MFE400 PROBABLE CORRECTION Check/restore power Check water filter/hand valve/float valve Check bin thermostat Check bin thermostat Check why switch is off Check &... - Page 16 MFE400 SERVICE DIAGNOSIS PROBLEM Unusual noise Water leaks from cabinet No refrigeration POSSIBLE CAUSE Mineral scale in evaporator Auger coupling dry Auger coupling worn Bearings worn Gearmotor loose on frame Low water level Tubing vibrating Tooth on a gear missing...
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Page 17: Removal And Replacement
Sealant Here Rubber Metal 3. Apply Scotsman part number 19-0529-01 food grade sealant to the auger shoulder before pushing on the water seal. Place just enough sealant onto the shoulder of the auger, so that when the water seal is placed on the auger, the gap between the auger shoulder and the water seal is completely filled with the sealant. -
Page 18: Gearmotor Assembly
When inspecting the internal parts, look for: Condition and quantity of lubricant. (The proper oil level is near the top of the output (biggest) gear. This takes 5 oz. Use Scotsman oil, part number A25835-001. Bearing condition Gear and Shaft condition Woodruff key between output gear and shaft. - Page 19 MFE400 Gearmotor Service SHAFT SEALS MOTOR COVER OUTPUT SHAFT WINDING ROTOR FIRST GEAR AND PINION May 1994 Page 19...
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Page 20: Reservoir
MFE400 Reservoir. 1. Shut off the water supply. 2. Remove the top panel. 3. Remove the right side panel. 4. Drain the water reservoir and evaporator. Cover 5. Disconnect inlet and outlet tubes from the Water Inlet reservoir. 6. Remove thumbnut holding reservoir to its mounting bracket. -
Page 21: Refrigeration
Refrigeration System This ice machine uses R-134a as the refrigerant. This refrigerant has no chlorine, and therefore requires polyolester type refrigerant oil. This oil requires specific service procedures. General Service A HFC type liquid line drier is required. "Standard" driers may not take out enough moisture and may affect the oil additives.