b'technical selection guideSTEP 1 Determine the Heat LoadIf the system heat load is already known in HP, convert BTU/HR = 2545 x HPHP into BTU/hour using the following conversion: Actual heat load of the hydraulic system can be calculated by measuring the rise in temperature under full load conditions and using the following equation:P =((V x T x C x ))/((t x 317.3)) C = Specific Heat of Hydraulic Oil (Btu/lb F)P = Heat Load (Hp)= Density of Hydraulic Oil (lb/ft3)V = Fluid Volume of the Hydraulic System (Gal) t = Time of test (min)T = Measured Temperature Increase (F)STEP 2 Determine the Actual ITD DesiredSTEP 3 Find the Air Velocity Correction FactorSCFM = Standard Cubic Feet per Minute (from fan data)SFPM = Standard Feet per Minute (velocity of air over the cooler)Once you have calculated the SFPM Velocity, enter the air velocity correction curve to determine thecorrection factor.STEP 4 Calculate Adjusted BTU/hour for SelectionSTEP 5 Select the Model From The CurvesRefer to the Performance Metrics on pages 10-12, and read up from the GPM to the required heat rejection. Select any model on or above this point.13'