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UP, UPS Series 20011. Product introductionIntroductionThe Grundfos UP(S) Series 200 line of wet rotorcirculators is unique to commercial buildingservices. Most competitor pumps are dry runners.UP(S) wet rotor circulators, on the other hand, aredesigned so that the water being pumped surroundsthe rotor, cooling and lubricating the shaft andbearings.ApplicationsThe pumps are designed for circulation of liquids inheating and air-conditioning systems. They can alsobe used in domestic hot-water systems.Applications for the UP(S) pumps include:• Heating systems for apartments, colleges, hospitals,institutions and schools• hot water recirculation for hotels, collegesinstitutions, hospitals, and apartments• large residential heating• snow melt.To ensure optimum operation, the dimensioning rangeof the system must fall within the performance range ofthe pump. See sections 6. Operating conditions onpage 13 and 8. Technical data on page 19.Product introductionFig. 1Grundfos UP, UPS Series 200 circulator pumpsWet rotor design eliminates the need for a fan to coolthe motor. Fans are often a source of noise andvibrations that can resonate throughout a building viathe pipework. Eliminating the fan results in very quietoperation.UP(S) Series 200 pumps are available in cast ironconstruction for closed (heating and air conditioning)and bronze construction for open (domestic hot water)systems.Both cast iron and bronze UP(S) Series 200 pumpsutilize laser-welded stainless steel impellers to achievehigh pump efficiency.The standard UP(S) motors are suitable for variablespeed drive applications.Terminal box modulesUPS pumps are equipped with a standard or protectionmodule in the terminal box. Pumps with standardmodule must be connected to the power supply via anexternal contactor, whereas pumps with protectionmodule can be connected directly to the power supply.For further information about the different modules,see pages 17 through 18.GrA3223, GrA3217Pumped liquidsGrundfos UP, UPS Series 200 pumps are suitable forpumping thin, clean, non-aggressive andnon-explosive liquids, not containing any solidparticles, fibers or mineral oil.In domestic hot-water systems it is advisable to usebronze pumps only for water with a degree of hardnesslower than approx. 14°dH. For water with a higherdegree of hardness, a Grundfos TP dry-rotor pump isrecommended.The pumps must not be used for the transfer offlammable liquids such as diesel oil and gasoline.For liquid temperature, see section 6. Operating conditionson page 13.Features and benefitsThe Grundfos range of UP(S) Series 200 circulatorpumps offer many beneficial features:• Quiet• maintenance-free• UPS pumps have a 2 or 3 speed switch, whichincreases the comfort level for the application• small profile (one piece vs. three piece)• sealless, which eliminates worries about hot waterleakage• pumped water lubricates the shaft and bearings sothere is no oil to leak• no couplers to change.3