hoshizaki technical support tech -tips - Hoshizaki America, Inc.

areas of the stainless steel plates. This method of heattransfer allows the individual cubes to fall off theplates properly with minimum melting.But what if we don’t maintain proper water volumeand flow? What effect will that have on the machine?Well, I’m glad you asked that question. Really thereare two main concerns to look at here. First, lowwater volume and flow reduces harvest efficiencybecause the unit depends on that volume of water tohelp transfer the heat from the hot gas. If the adequateamount of water is not provided, some cubes maystick to the plate which will ultimately wind up causingthe dreaded freeze up of the evaporator!Second, the lack of water volume and flow coulddecrease the length of defrost too much. How youask? Without the water removing the heat from thecopper serpentine the temperature will rise too fast atthe suction line were the thermister is mounted andcause the defrost completion timer on the board toinitiate prematurely. This could leave ice on theevaporator which will again ultimately wind up causingthe dreaded freeze up of the evaporator. Déjà Vu allover again.Lastly, there is a possibility of less than a full reservoirat the end of the harvest cycle. This would causeshorter cycles resulting in a low batch weight, andpoor efficiency / production.Hopefully the information above has helped you tounderstand the importance of water volume and flow.Also it is very important for you to keep thisinformation in mind when sizing water filters, watertreatment systems, and water lines. Below you willfind water line size and flow rate charts also found inthe Technicians pocket guideWATER LINE SIZEMODEL Line Size Fitting SizeKM-150B - KM-250B 3/8” OD 3/8” FlareKM-280 – KM-900 3/8” OD 1/2” FPTKM-1300 – KM-2400 1/2” OD 1/2” FPTAll Flakers/DCM’s 3/8” OD 1/2” FPTFLOW RATESKM-150/250/280/All FlakersKM-500KM-630/900/All DCM’sKM-1300/1600KM-2000/24001.05 GPM1.58 GPM2.11 GPM3.96 GPM4.23 GPMINTRODUCING THE AM-100 AND AM150In the October 2002 Vol. of Tech Tips weintroduced the AM-50BAE ice maker. We are nowproud to introduce two additional models in thesmaller AM style machines. The AM-100BAE usesR-134a and produces approximately 105 pounds ofice with 44 pounds of storage and the AM150BAFuses R-404a with 150 pounds of production with 88pounds of storage. These models will complementour already extensive line of cubers and allow moreversatility when working with your customers uniqueapplications. These new smaller ice machines willalso open up many new markets that were notavailable in the past.The sequence of operation for the AM-100 and AM-150 is basically the same as we discussed in theOctober 2002 issue with just some minor timingchanges. For more information and availability ofthese units, contact your local distributor. To viewspec sheets and service manuals access our web siteat www.hoshizaki.com.AS ALWAYS…If you have any comments or suggestions for TechTips please send them to:Techsupport@hoshizaki.com orFax to 1-800-843-1056 ATTN: Tech Tip editorCOMING NEXT MONTH…1. Reach In Freeze upsVolume 202 page 2