Manitowoc S1000M Service Manual

Also see for S1000M: Installation use and care manual

Contents

Manitowoc S1000M Service Manual Manual pdf 70 page image

Refrigeration System Section 77-4 Part Number 80-1559-3BEFORE BEGINNING SERVICEIce machines may experience operational problems onlyduring certain times of the day or night. A machine mayfunction properly while it is being serviced, butmalfunctions later. Information provided by the user canhelp the technician start in the right direction, and maybe a determining factor in the final diagnosis.Ask these questions before beginning service:• When does the ice machine malfunction? (night, day,all the time, only during the freeze cycle, etc.)• When do you notice low ice production? (one day aweek, every day, on weekends, etc.)• Can you describe exactly what the ice machineseems to be doing?• Has anyone been working on the ice machine?• During “store shutdown,” is the circuit breaker, watersupply or air temperature altered?• Is there any reason why incoming water pressuremight rise or drop substantially?ICE PRODUCTION CHECKThe amount of ice a machine produces directly relates tothe operating water and air temperatures. This meansan ice machine in a 70°F (21.1°C) room with 50°F(10.0°C) water produces more ice than the same modelcondensing unit with a 90°F (32.2°C) outdoor ambienttemperature and 70°F (21.1°C) water.1. Determine the ice machine operating conditions:Air temp. entering condenser: _______ °Air temp. around ice machine: _______ °Water temp. entering sump trough: _______ °2. Refer to the appropriate 24 Hour Ice ProductionChart. Use the operating conditions determined inStep 1 to find published 24 hour ice production.3. Perform an actual ice production check. Use theformula below.4. Compare the results of step 3 with step 2. Iceproduction checks that are within 10% of the chartare considered normal. If they match closely,determine if:• another ice machine is required.• more storage capacity is required.• relocating the existing equipment to lower theload conditions is required.Contact the local Manitowoc distributor forinformation on available options and accessories.1. __________Freeze Time+ __________Harvest Time= __________Total Cycle Time2.1440Minutes in 24Hours÷ __________Total Cycle Time= __________Cycles Per Day3.__________Weight of OneHarvestx __________Cycles Per Day= __________Actual 24 Hour IceProductionImportantTimes are in minutes.Example: 1 min., 15 sec. converts to 1.25 min.(15 seconds ÷ 60 seconds = .25 minutes)Weights are in pounds.Example: 2 lb., 6 oz. converts to 2.375 lb.(6 oz. ÷ 16 oz. = .375 lb.)Weighing the ice is the only 100% accuratecheck. However, if the ice pattern is normal and the1/8" thickness is maintained, the ice slab weightslisted with the 24 Hour Ice Production Charts maybe used.