5803641-JIM-B-0620
Johnson Controls Ducted Systems 43
Table 23: Additional Static Resistance
Size
(Tons)
Model CFM Cooling Only
1
1. Add these values to the available static resistance in the respective Blower Performance Tables.
Economizer
2
3
2. Deduct these values from the available external static pressure shown in the respective Blower Performance Tables.
3. The pressure drop through the economizer is greater for 100% outdoor air than for 100% return air. If the resistance of the return air duct
is less than 0.25 IWG, the unit will deliver less CFM during full economizer operation.
4” Pleated Filter
2
Electric Heat kW
2
3 6 9 15 20 24
JA3 (3) ZJ
900 0.05 -0.05 0.01 0.00 0.00 0.00 0.01 0.01 0.01
1000 0.05 -0.03 0.02 0.00 0.00 0.00 0.02 0.02 0.02
1100 0.04 -0.02 0.03 0.01 0.01 0.01 0.02 0.02 0.02
1200 0.04 0.00 0.04 0.01 0.01 0.01 0.02 0.02 0.02
1300 0.03 0.01 0.05 0.01 0.01 0.01 0.03 0.03 0.03
1400 0.03 0.03 0.07 0.02 0.02 0.02 0.03 0.03 0.03
1500 0.03 0.04 0.08 0.02 0.02 0.02 0.04 0.04 0.04
JA4 (4)
JA5 (5)
ZJ
1200 -0.01 0.10 0.05 0.01 0.01 0.01 0.02 0.02 0.02
1300 -0.01 0.11 0.06 0.01 0.01 0.01 0.03 0.03 0.03
1400 -0.01 0.12 0.06 0.02 0.02 0.02 0.03 0.03 0.03
1500 -0.01 0.13 0.07 0.02 0.02 0.02 0.04 0.04 0.04
1600 -0.01 0.14 0.08 0.02 0.02 0.02 0.04 0.04 0.04
1700 -0.01 0.15 0.08 0.03 0.03 0.03 0.05 0.05 0.05
1800 -0.02 0.16 0.09 0.03 0.03 0.03 0.05 0.05 0.05
1900 -0.02 0.17 0.10 0.04 0.04 0.04 0.06 0.06 0.06
2000 -0.02 0.18 0.10 0.04 0.04 0.04 0.07 0.07 0.07
2100 -0.03 0.19 0.11 0.05 0.05 0.05 0.07 0.07 0.07
2200 -0.03 0.20 0.12 0.06 0.06 0.06 0.08 0.08 0.08
2300 -0.04 0.21 0.12 0.06 0.06 0.06 0.09 0.09 0.09
2400 -0.04 0.22 0.13 0.07 0.07 0.07 0.10 0.10 0.10
2500 -0.05 0.23 0.14 0.08 0.08 0.08 0.11 0.11 0.11
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