York DY 048 Technical Manual
Also see for DY 036: Technical guide
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Contents
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343615-YTG-B-0308Johnson Controls Unitary Products 191. Deduct these resistance values from the available external static pressure shown in SUPPLY AIR BLOWER PERFORMANCE Tables.2. Add these resistance values to the available static resistance values on SUPPLY AIR BLOWER PERFORMANCE Tables.3. The pressure through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct system is less than0.25 IWG, the unit will deliver less CFM during full economizer operation.TABLE 21: STATIC RESISTANCESDESCRIPTIONRESISTANCE, IWGCFM1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000ECONOMIZER 1,3 0.07 0.08 0.09 0.11 0.13 0.15 0.17 0.20 0.23 0.26 0.30ELECTRICHEATERS 17-15KW 0.04 0.05 0.06 0.07 0.08 0.10 0.12 0.14 0.16 0.19 0.2220-30KW 0.06 0.07 0.08 0.09 0.11 0.13 0.15 0.17 0.20 0.23 0.26COOLING ONLY 2 0.08 0.10 0.12 0.14 0.16 0.18 0.20 0.23 0.26 0.29 0.32TABLE 22: ELECTRIC HEAT CFM LIMITATIONSSize(Tons) VoltageMinimum Supply Air (CFM)Heater kW5 7 10 15 20 303208/230-1-60 900 900 900 900 900 -208/230-3-60 900 900 900 900 900 -460-3-60 - 900 900 900 900 -600-3-60 - - 900 900 900 -4208/230-1-60 1200 1200 1200 1200 1200 -208/230-3-60 1200 1200 1200 1200 1200 -460-3-60 - 1200 1200 1200 1200 -600-3-60 - - 1200 1200 1200 -5208/230-1-60 1500 1500 1500 1500 1500 1500208/230-3-60 1500 1500 1500 1500 1500 1500460-3-60 - 1500 1500 1500 1500 1500600-3-60 - - 1500 1500 1500 1500 |
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