User manual SCOTSMAN NM1250

[. . . ] NM1250 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 informtion needed to install, start up, clean, maintain, and service this ice system. It features: front service for the evaporator, gearmotor, control box, water reservoir and bincontrol; stackability by use of kit KSTACK30; electronic circuitry for monitoring ice and water level; a thermostatic expansion valve; and R502 as the refrigerant. TABLE OF CONTENTS For the Installer Specifications . 16 Service Diagnosis Removal and Replacement Water Reservoir & Bin Control . 30 Parts Lists and Wiring Diagrams are located in the center of this manual, printed on yellow paper. February, 1989 Page 1 NM1250 FOR THE INSTALLER The NM1250 is designed to fit the following Scotsman storage bins: B590 and extensions (with bin top KBT18) HTB500 or BH500 BH800 using bin top KBT15 BH1000 using bin top KBT16 The normal finish for the machine is enamel-sandalwood. [. . . ] 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 front panel. February, 1989 Page 16 NM1250 MAINTENANCE ////////////////////////////WARNING//////////////////////////// Disconnect electrical power before beginning. ///////////////////////////////////////////////////////////////////////// 1. 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 base of the ice chute, and wipe the inside clean, as illustrated. ICE CHUTE SLIDE IN AND OUT ICE LEVEL SENSORS WATER RESERVOIR WATER LEVEL SENSOR Inspect the assembly, looking for wear. Clean or replace the air cooled condenser filter. Clean the air cooled condenser. 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 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 SPANNER WRENCH BREAKER COVER BREAKER February, 1989 Page 17 NM1250 MAINTENANCE: Auger ///////////////////////////WARNING//////////////////////////// Disconnect electrical power before begining. ///////////////////////////////////////////////////////////////////////// In some installations the water supply to the icemaker will be so concentrated with dissolved minerals, (such as calcium carbonate) that as ice is made, the evaporator and auger become coated with the minerals, requiring a more frequent cleaning 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. For more information on removal of these parts, see REMOVAL AND REPLACEMENT. [. . . ] Note: The case cover output gear, bearings, and shaft are one pressed together assembly. If the oil level and condition is acceptable, quickly check the gears and bearings. If there is evidence of water in the oil (rusty bearings and gears; the oil having a creamy white appearance; oil level too high) carefully inspect the bearings and gears. Note: The gears and bearings are available only as pressed together sets. [. . . ]