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5167821-YTG-J-0518
Johnson Controls Ducted Systems
31
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
037 (3)
ZT
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
049 (4)
061 (5)
ZT
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
Gas Heat Minimum Supply Air
Size
(Tons)
Model
Heat Size
Supply Air (CFM)
Heating
Min
Max
037
(3)
ZT
N06
890
2220
N08
915
2370
N12
1130
1800
049
(4)
ZT
N06
890
2220
N08
915
2370
N12
1290
2250
061
(5)
ZT
N08
915
2370
N12
1380
2570
N16
1580
2630
Electric Heat Minimum Supply Air
3 thru 5 Tons
Size
(Tons)
Model
Voltage
Minimum Supply Air (CFM)
Heater kW
3
6
9
15
20
24
037
(3)
ZT
208/230-3-60
960
960
1020
1020
-
-
460-3-60
980
960
960
960
-
-
600-3-60
-
-
960
960
-
-
049
(4)
ZT
208/230-3-60
-
1280
1420
1420
1420
-
460-3-60
-
1400
1400
1400
1400
-
600-3-60
-
-
1400
1400
1400
-
061
(5)
ZT
208/230-3-60
-
1600
1600
1600
1600
1600
460-3-60
-
1600
1600
1600
1600
1600
600-3-60
-
-
1600
1600
1600
1600