IPCX Chillers - Dunham-Bush Americas

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APPLICATION DATA (CONT.)○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○2. Maximum—ECWT (Entering Condenser WaterTemperature) is 95°F (35°C) without loss of unitcapacity or potential high condensing temperature/pressure shutdown. The water temperature changerate must be less than 2°F (1.1°C) per minute toassure proper chiller operating stability. For highercondenser entering water temperature, consult thefactory.3. Unit Operating Efficiency and trouble freeoperation is greatly influenced by the enteringcondenser water temperature, proper flow, and themean temperature of the condenser water.4. Wide Condenser Water Temperature Ranges forunits operating with 95° ECWT (35°C) and higher,and wider than 10°F (5.6°C) range, increases theunit condensing temperature and decreases theunit efficiency. This situation is usually found inapplications with undersized condenser watertowers.Glycol Freeze ProtectionIf the chiller or fluid piping may be exposed totemperatures below freezing, glycol protection isrecommended if the water is not drained. Therecommended protection is 10°F (5.6°C) below theminimum ambient temperature in the equipment roomand around piping. Use only glycol solutions approvedfor heat exchanger duty. DO NOT use automotive antifreeze.If the equipment is being used for applications below38°F (3.3°C), glycol should be used to prevent freezedamage. The freeze protection level should be 10°F(5.6°C) lower than the leaving brine temperature.Consult factory for use with other low temperaturefluids.5. Narrow Condenser Water TemperatureRanges are desirable for unit efficiency, because itreduces the mean condensing temperature.Table 24ATable 24BEthylene GlycolFREEZE POINT% E.G.By Mass °F °C10 26.2 -3.215 22.2 -5.320 17.9 -7.925 12.7 -10.830 6.7 -14.135 -0.2 -17.840 -8.1 -25.845 -17.5 -27.550 -28.9 -33.8Propylene GlycolFREEZE POINT% P.G.by Mass °F °C10 26.1 -3.315 22.9 -5.120 19.2 -7.225 14.7 -9.730 9.2 -12.835 2.4 -16.640 -6.0 -21.345 -16.1 -27.050 -28.3 -33.824
QUICK SELECTIONS AT A GLANCE○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○ ○Unit Selection—Selection curves are located below.Unit size is determined by the intersection of the requiredcooling tons and leaving fluid temperature.Selections are based on an ethylene glycol solution witha freeze point 10°F below the evaporating temperature.Please contact the localrepresentative for selections at leaving temperaturesbelow 10°F.Horsepower Per Ton—Compressor horsepower per toncan be estimated from Figure 25A as a function of thecooled fluid leaving temperature and the condenserwater leaving temperature. As a rule of thumb, the curvevalues for horsepower at design conditions can bereduced by 15 percent to estimate annual averageelectric consumption. This reduction results fromoperation at lower annual average condenser watertemperatures resulting from annual average wet bulbtemperatures lower than design.Part Load Performance—The curve (Figure 25B) on thispage gives approximate percent power input as afunction of the percent of full load tons and appliesequally to all size units.Figure 25AHorsepower Per Ton2.01.51.0Horsepower Per Ton95°F85°FLeavingCondenserWater0.50 20 30 40 50Evaporator Leaving Fluid Temperature (°F)Figure 25BPercent Power1009080706050403020100Part Load Power Input10 20 30 40 50 60 70 80 90 100Percent LoadFigure 25CEvaporator Leaving Fluid Temperature (°F)5040302010<strong>IPCX</strong> Cooling Capacity120 180350 500 580 700 7502300 100 200 300 400 500 600 700 800Tons at 95°F Leaving Condenser Water TemperatureHighTemperatureMediumTemperatureLowTemperatureConsult factory for conditions below 10° Leaving Fluid Temperature.25
Page 1 and 2: ○ ○ ○ ○ ○ ○ ○ ○ ○
Page 4: UNIT FEATURES AND OWNER BENEFITS○
Page 7: DESIGN FEATURES: DIRECT DRIVE TWIN-
Page 11: UNIT FEATURES: CONTROL & STARTER PA
Page 15 and 16: DESIGN FEATURES: MICROCOMPUTER CONT
Page 17 and 18: DESIGN FEATURES: PART-LOAD PERFORMA
Page 19 and 20: OPTIONS (CONT.)○ ○ ○ ○ ○
Page 21 and 22: INSTALLATION DATA (CONT.)○ ○
Page 23: APPLICATION DATA (CONT.)○ ○ ○
Page 27 and 28: DIMENSIONAL DATA (CONT.)○ ○ ○
Page 29 and 30: DIMENSIONAL DATA (CONT.)○ ○ ○
Page 31 and 32: TYPICAL PIPING SCHEMATIC (CONT.)○
Page 33 and 34: TYPICAL CONTROL WIRING DIAGRAM (CON
Page 35 and 36: STARTER CONNECTION REQUIREMENTS○
Page 38 and 39: 1.08 WarrantyA. The equipment suppl
Page 40 and 41: B. A microcomputer-based controller
Page 43 and 44: Under voltage relayCurrent transfor

IPCX Chillers - Dunham-Bush Americas

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