York MagnaDRY Technical Manual

Contents

York MagnaDRY Technical Manual Manual pdf 24 page image

265485-XTG-B-120824 Johnson Controls Unitary ProductsTABLE 18: ADDITIONAL STATIC RESISTANCE (METRIC)m3/s Cooling Only1 Economizer2 3 Electric Heat kW29 18 24 36 540.89 14.9 5.0 12.4 14.9 17.4 19.9 24.80.99 17.4 5.0 14.9 17.4 19.9 22.4 27.31.08 19.9 5.0 17.4 19.9 22.4 24.8 32.31.18 22.4 5.0 19.9 22.4 24.8 27.3 34.81.27 27.3 7.5 22.4 24.8 29.8 32.3 39.71.36 29.8 7.5 24.8 27.3 32.3 34.8 44.71.46 34.8 7.5 29.8 32.3 37.3 39.7 49.71.55 39.7 7.5 32.3 34.8 42.2 44.7 54.61.65 44.7 9.9 37.3 39.7 47.2 49.7 59.61.74 49.7 9.9 42.2 44.7 52.2 49.7 64.61.83 57.1 9.9 47.2 49.7 57.1 59.6 69.51.93 62.1 9.9 52.2 54.6 62.1 64.6 77.01.02 69.5 12.4 57.1 59.6 69.5 72.0 84.42.12 74.5 12.4 62.1 64.6 74.5 77.0 91.92.21 82.0 12.4 69.5 72.0 82.0 84.4 99.32.30 89.4 12.4 74.5 77.0 86.9 91.9 106.82.40 96.9 14.9 82.0 84.4 94.4 99.3 114.22.49 104.3 14.9 86.9 91.9 101.8 106.8 121.72.59 111.8 14.9 94.4 99.3 109.3 114.2 131.62.68 119.2 14.9 101.8 106.8 116.7 121.7 139.12.77 129.1 17.4 109.3 114.2 124.2 131.6 146.52.87 139.1 17.4 116.7 121.7 131.6 139.1 154.02.96 149.0 17.4 124.2 131.6 139.1 146.5 161.41. Add these resistance values to the available static resistance in the respective Blower Performance Tables.2. Deduct these resistance values from the available external static pressure shown in the respective Blower Performance Table.3. The pressure drop through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the returnair duct system is less than 62.1 Pa, the unit will deliver less m 3 /s during full economizer operation.