User manual SCOTSMAN ND550

[. . . ] ND550 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 ND550 is a combination nugget ice maker and countertop dispenser, with the option of wall mounting. The ND550 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 R502 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. TABLE OF CONTENTS For the Installer Specifications . [. . . ] ////////////////////////////////////////////////////////////////////////// 7. Prepare the cleaning solution: Mix eight ounces of Scotsman Ice Machine Cleaner with three quarts of hot water. Slowly pour the cleaning solution into the water reservoir until it is full. As the ice maker begins to use water from the reservoir, continue to add more cleaning solution to maintain a full reservoir. After all of the cleaning solution has been added to the reservoir, and the reservoir is nearly empty, switch the master switch to OFF. After draining the reservoir, as in step 6, wash and rinse the water reservoir. Continue ice making for at least 15 minutes, to flush out any cleaning solution. //////////////////////////////WARNING/////////////////////////// DO NOT USE any ice produced from the cleaning solution. /////////////////////////////////////////////////////////////////////////// 15. Add warm water to the ice storage bin and thoroughly wash and rinse all surfaces within the bin. Sanitize the bin interior with an approved sanitizer using the directions for that sanitizer. Replace the ice storage bin cover, and the front panel. December, 1988 Page 19 ND550 MAINTENANCE AND CLEANING ///////////////////////////WARNING///////////////////////////// Disconnect electrical power before beginning. ////////////////////////////////////////////////////////////////////////// 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 buildup. 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 grommets in the ice chute, and wipe them clean. BIN CONTROL SENSOR BIN CONTROL SENSOR CLEAN WATER SENSOR PROBE ////////CAUTION////// THE TIP IS MADE OF GLASS ////////////////////////////// BIN TOP ICE SWEEP 3. The bearing in the breaker should also be checked at least two times per year. Check the bearing by: · removing the ice chute cover · unscrewing the ice sweep · removing the water shed · using a spanner wrench and unscrewing the breaker cover. · unscrewing the auger stud Inspect the assembly, looking for wear. Check and tighten all bolts and screws. August, 1989 Page 20 ND550 MAINTENANCE AND CLEANING 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. [. . . ] D) After replacing parts as required, (if any) reassemble the gearcase. The two smaller gears and the oil should be in the lower case, the output gear will be with the cover. As you lower the cover onto the lower case, cover will have to be moved closer to the second gear after the output gear has cleared the second gear top bearing. E) After the case is together, and the locating pins are secure in both ends, replace all cap screws. [. . . ]