User manual SCOTSMAN NDE754

[. . . ] 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 maker-dispenser. The NDE754 is a combination nugget ice maker and countertop dispenser. A water station is standard. NDE754 The NDE754 ice making section is equipped with the following features: electronic controls for bin level and low water; thermostatic expansion valve; front service for most components; and R-404a (HP62) refrigerant. The ice dispensing section is a seamless plastic storage bin, with a stainless steel ice agitator at the bottom to sweep the ice into the dispensing chute. [. . . ] Add warm water to the ice storage bin and thoroughly wash and rinse all surfaces within the bin. Sanitize the bin interior, cover, door and agitator with an approved sanitizer using the directions for that sanitizer. Replace the ice storage bin cover, and the front panel. 8. Slowly pour the cleaning solution into the water reservoir until it is full. Wait 15 minutes, then switch the master switch to ON. As the ice maker begins to use water from the reservoir, continue to add more cleaning solution to maintain a full reservoir. March 2000 Page 15 NDE754 SENSOR MAINTENANCE 1. The ice machine senses water level by a probe located in the water reservoir. At least twice a year, the probe should be removed from the reservoir, and the tip wiped clean of mineral build-up. SLIDE SENSORS UP TO REMOVE 2. The bin control uses devices that sense light, therefore they must be kept clean enough so that they can "see". At least twice a year, remove the bin control sensors from the ice chute, and wipe them clean. Clean the Probe's Tip with ice machine cleaner and a clean, soft cloth. March 2000 Page 16 BEARING MAINTENANCE The bearing in the breaker should also be checked at least two times per year. Check the bearing by: NDE754 ·unscrewing the breaker cover. Auger Stud ·removing the ice chute cover Ice Sweep Cap Screw ·unscrewing the ice sweep ·removing the water shed Breaker Cover Off Inspect the bearing. There should be plenty of grease in sight. If grease is needed the bearing and breaker should be removed to check the action of the bearing. To remove the breaker remove the lower ice chute then take out all four allen head cap screws and pull the breaker off the auger and evaporator. If the bearing only needs grease, inject grease into the bearing using Scotsman grease needle pn 02-3559-01 and Scotsman bearing grease cartridge, pn A36808-001. Be sure to inject grease evenly and thoroughly. See Removal and Replacement section to replace bearing or seals. Bearing Needle, pn 02-3559-01 ·unscrewing the auger stud Reverse to reassemble. March 2000 Page 17 NDE754 AUGER MAINTENANCE In some areas, the water supply to the ice maker will contain a high concentration of minerals, and that will result in an evaporator and auger becoming coated with these minerals, requiring a more frequent removal than twice per year. If in doubt about the condition of the evaporator and auger, the auger can be removed so the parts can be inspected. Note: Water filters can filter out suspended solids, but not dissolved solids. "Soft" water may not be the complete answer. Check with a water treatment specialist regarding water treatment. For more information on removal of these parts, see REMOVAL AND REPLACEMENT. BREAKER AND AUGER ASSEMBLY Moving Parts Hazard. [. . . ] Do NOT use mineral oil in this refrigeration system. NDE754 Instructions for Liquid Charging R-404A In preparation for charging, the low side hose should have a sight glass, and/or a restricting device (such as a "Charge Faster") installed in it for ·When the system is serviced, a special liquid metering liquid into the low side of the system. After a thorough evacuation shut off the manifold replacement compressors. ·R-404A is not compatible with mineral oil so 2. Place a drum of R-404A onto an electronic these ice machines use Polyolester oil. [. . . ]