User manual SCOTSMAN TDE470

[. . . ] TDE470 TDE470 Service Manual Purpose of this manual: To provide detailed installation and operation instructions; to give insights into how the machine works; to list possible causes for problems; and to suggest procedures for specific types of service. The refrigeration system is air cooled, using R-134a as a refrigerant. The control system uses electric eyes as a bin control and a water level sensor as the water safety control. When ice is needed, a motor rotates a stainless steel vane inside the storage bin and sweeps the ice into the spout. Table of Contents Specifications: . [. . . ] Another purpose of the circuit board is to turn the machine off if there is not enough water in the machine. · When the water level in the reservoir falls below the tip of the water level sensor, the machine will "shut down" · After a 6 minute delay, if the water refills the reservoir, the machine will start up again. Separate from the circuit board: · If the high pressure control (cut out switch) opens, the compressor will stop immediately (through the contactor ). · The master switch is the manual control for the complete machine, but it is not a service disconnect. Ice Vending · When a user places a container in front of the Touch Free ice sensor and below the ice delivery chute, the circuit board connects power to the bin drive motor and ice is dispensed for as long as the container is present. If the user does not remove the container, ice will be dispensed for 60 seconds and then stop. · When a user places a container in front of the Touch Free water sensor, and below the water spout, the circuit board connects power to the water solenoid valve and water is dispensed. If the user does not remove the container water will be dispensed for 90 seconds and then stop. Splash panel cleaning: A switch, located to the left of the spout, may be pushed to disable the Touch-Free sensor for splash panel cleaning. It automatically resets after 2 minutes, or, if pushed within the 2 minutes, resets the circuit board to enable the Touch Free sensors. February 1995 Page 14 TDE470 Maintenance: Although the ice in this dispenser is completely untouched, the water and ice vending systems will need to be periodically sanitized and de-mineralized. Schedule the sanitation, cleaning and de-mineralization on a regular basis to keep the ice clean and the machine operating efficiently. Sanitation and Cleaning Water System: This ice machine requires periodic sanitation and de-mineralization. Mix 8 ounces of Scotsman Ice Machine Cleaner and 3 quarts of hot (95oF. Wait 15 minutes for the cleaner to dissolve the minerals inside the evaporator. As the machine operates, pour in the balance of the cleaning solution. Reconnect water supply, operate the machine for 15 more minutes, then switch it off. Repeat steps 3-11, except substitute a locally approved sanitizing solution for the cleaner. A possible sanitizing solution may be obtained by mixing 1 ounce of household bleach with 2 gallons of clean, warm (95oF. -115oF. ) water. Thoroughly wash the bin's interior, bin top interior, spout, ice vane and bin bottom with the sanitizing solution. Wash the sink area with the sanitizing solution and pour sanitizing solution down the sink drain. Use pressurized air to blow the lint from the outside of the condenser in towards the fan motor. A vacuum cleaner hose placed on near the fan motor should pick up most of the dust. Replace all panels and reconnect electrical power. February 1995 Page 15 TDE470 Dispense Area Sanitation The dispense area is made up of the spout, sink, grill and splash panel. The sink should be flushed with hot water and wiped clean with sanitizer. [. . . ] Do not remove the hose caps before checking the position of the valve. Use a 3/16" allen wrench to open and close the valve. Stem Cap Torque to 8-12 ft. PSIG of R-134a -10 2. 0 -6 3. 7 -4 4. 6 -2 5. 5 0 6. 5 1 7. 0 2 7. 5 3 4 5 10 12 14 16 18 20 25 30 31 32 33 34 35 40 45 50 75 90 110 120 130 150 8. 0 8. 6 9. 1 12. 0 13. 2 14. 4 15. 7 17. 1 18. 4 22. 1 26. 1 26. 9 27. 8 28. 6 29. 5 30. 4 35. 0 40. 0 45. 4 78. 7 104. 3 146. 4 171. 1 198. 7 262. 8 Torque Stem to 6-8 ft. lb. As with any other refrigerant, do not place pressurized air or oxygen into the refrigeration system. [. . . ]