Additional Static Resistance - York ZH Series Instruction Manual

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Table 23: Additional Static Resistance
Size
Model
CFM Cooling Only
(Tons)
900
1000
1100
1200
1300
1400
037 (3)
ZH
049 (4)
1500
1600
1700
1800
1900
2000
1500
1600
1700
1800
1900
061 (5)
ZH
2000
2100
2200
2300
2400
2500
1. Add these values to the available static resistance in the respective Blower Performance Tables.
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.
Johnson Controls Ducted Systems
1
2 3
Economizer
4" Pleated Filter
0.05
-0.05
0.05
-0.03
0.04
-0.02
0.04
0.00
0.03
0.01
0.03
0.03
0.03
0.04
0.02
0.06
0.02
0.07
0.01
0.08
0.01
0.10
0.00
0.11
-0.01
0.13
-0.01
0.14
-0.01
0.15
-0.02
0.16
-0.02
0.17
-0.02
0.18
-0.03
0.19
-0.03
0.20
-0.04
0.21
-0.04
0.22
-0.05
0.23
2
3
6
0.01
0.00
0.00
0.02
0.00
0.00
0.03
0.01
0.01
0.04
0.01
0.01
0.05
0.01
0.01
0.07
0.02
0.02
0.08
0.02
0.02
0.09
0.02
0.02
0.10
0.03
0.03
0.11
0.03
0.03
0.13
0.04
0.04
0.14
0.04
0.04
0.07
0.02
0.02
0.08
0.02
0.02
0.08
0.03
0.03
0.09
0.03
0.03
0.10
0.04
0.04
0.10
0.04
0.04
0.11
0.05
0.05
0.12
0.06
0.06
0.12
0.06
0.06
0.13
0.07
0.07
0.14
0.08
0.08
5167534-YIM-G-0518
2
Electric Heat kW
9
15
20
0.00
0.01
0.01
0.00
0.02
0.02
0.01
0.02
0.02
0.01
0.02
0.02
0.01
0.03
0.03
0.02
0.03
0.03
0.02
0.04
0.04
0.02
0.04
0.04
0.03
0.05
0.05
0.03
0.05
0.05
0.04
0.06
0.06
0.04
0.07
0.07
0.02
0.04
0.04
0.02
0.04
0.04
0.03
0.05
0.05
0.03
0.05
0.05
0.04
0.06
0.06
0.04
0.07
0.07
0.05
0.07
0.07
0.06
0.08
0.08
0.06
0.09
0.09
0.07
0.10
0.10
0.08
0.11
0.11
24
0.01
0.02
0.02
0.02
0.03
0.03
0.04
0.04
0.05
0.05
0.06
0.07
0.04
0.04
0.05
0.05
0.06
0.07
0.07
0.08
0.09
0.10
0.11
45

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