![background image](http://html1.mh-extra.com/html/york/zt-series/zt-series_technical-manual_3878171044.webp)
5167821-YTG-K-1118
44
Johnson Controls Ducted Systems
ZT090 (7.5 ton) 3rd stage cooling
Air on evaporator
coil
Temperature of air on condenser coil
Total
capacity
1
(MBh)
Total input
(kW)
2
Sensible capacity (MBh)
Total
capacity
(MBh)
Total input
Sensible capacity (MBh)
CFM
WB
(°F)
Return dry bulb (°F)
Return dry bulb (°F)
90
85
80
75
70
65
90
85
80
75
70
65
75°F
85°F
1875
77
109.6
4.4
54.7
44.1
35.2
-
-
-
107.4
5.0
50.4
41.9
33.0
-
-
-
72
100.0
4.3
64.8
55.9
47.0
38.1
-
-
97.6
4.9
62.7
53.8
44.8
35.9
-
-
67
90.4
4.2
74.9
67.8
58.9
50.0
41.1
-
87.8
4.8
74.9
65.6
56.7
47.8
38.9
-
62
81.9
4.2
81.9
81.9
72.6
63.7
54.8
45.9
79.8
4.8
79.8
79.8
68.9
60.0
51.1
42.2
2250
77
116.0
4.4
59.3
49.0
38.6
-
-
-
111.6
5.0
56.7
46.4
36.0
-
-
-
72 105.8
4.3
72.3
62.0
51.6
41.2
-
-
101.4
4.9
69.7
59.3
49.0
38.6
-
-
67 95.7
4.3
85.3
75.0
64.6
54.2
43.9
-
91.2
4.8
82.6
72.3
61.9
51.6
41.2
-
62 86.6
4.2
86.6
86.6
79.7
69.3
59.0
48.6
82.9
4.8
82.9
82.9
75.3
64.9
54.6
44.2
57 82.5
4.2
82.5
82.5
77.8
67.5
57.1
46.7
81.0
4.8
81.0
81.0
74.5
64.2
53.8
43.5
2625
77 122.4
4.4
63.9
53.8
42.0
-
-
-
115.8
5.0
63.0
50.9
39.1
-
-
-
72 111.6
4.4
79.9
68.0
56.2
44.3
-
-
105.3
4.9
76.7
64.9
53.1
41.3
-
-
67 100.9
4.3
95.8
82.2
70.4
58.5
46.7
-
94.7
4.9
90.4
79.0
67.2
55.4
43.6
-
62 91.4
4.2
91.4
91.4
86.8
74.9
63.1
51.3
86.0
4.8
86.0
86.0
81.6
69.8
58.1
46.3
57 87.1
4.2
87.1
87.1
84.8
72.9
61.1
49.3
84.1
4.8
84.1
84.1
80.8
69.0
57.2
45.4
3000
77 128.8
4.5
68.6
58.7
45.4
-
-
-
120.0
5.1
69.3
55.4
42.1
-
-
-
72 117.5
4.4
87.4
74.1
60.8
47.5
-
-
109.1
5.0
83.7
70.5
57.3
44.0
-
-
67 106.2
4.3
106.2
89.4
76.1
62.8
49.5
-
98.1
4.9
98.1
85.6
72.4
59.2
46.0
-
62 96.2
4.3
96.2
96.2
93.9
80.6
67.3
53.9
89.1
4.8
89.1
89.1
88.0
74.8
61.5
48.3
57 91.7
4.2
91.7
91.7
91.7
78.4
65.1
51.8
87.1
4.8
87.1
87.1
87.1
73.9
60.7
47.4
3375
72 119.0
4.4
93.7
79.2
64.7
50.2
-
-
110.5
5.0
90.2
75.7
61.2
46.8
-
-
67 107.6
4.3
107.6
96.5
81.0
66.5
52.0
-
99.4
4.9
99.4
91.9
77.4
63.0
48.5
-
62 97.4
4.3
97.4
97.4
96.3
81.8
67.2
52.7
90.3
4.8
90.3
90.3
89.8
75.3
60.8
46.4
57 92.9
4.2
92.9
92.9
92.9
78.4
63.8
49.3
88.3
4.9
88.3
88.3
88.3
73.8
59.3
44.9
3750
72 120.5
4.4
100.0
84.3
68.6
52.9
-
-
112.0
5.0
96.6
80.9
65.2
49.5
-
-
67 108.9
4.3
108.9
103.7
85.9
70.2
54.4
-
100.8
4.9
100.8
98.1
82.4
66.7
51.0
-
62 98.7
4.3
98.7
98.7
98.7
83.0
67.2
51.5
91.5
4.9
91.5
91.5
91.5
75.8
60.1
44.4
57 94.1
4.2
94.1
94.1
94.1
78.4
62.6
46.9
89.5
4.9
89.5
89.5
89.5
73.7
58.0
42.3
95°F
105°F
1875
77
105.2
5.6
46.2
39.7
30.8
-
-
-
98.4
6.3
41.5
36.8
27.9
-
-
-
72
95.2
5.5
60.5
51.6
42.7
33.8
-
-
88.8
6.2
57.6
48.7
39.8
30.9
-
-
67
85.1
5.4
74.9
63.5
54.6
45.6
36.7
-
79.2
6.1
73.6
60.6
51.7
42.8
33.9
-
62
77.6
5.4
77.6
77.6
65.2
56.3
47.3
38.4
73.1
6.1
73.1
73.1
60.7
51.8
42.9
34.0
2250
77
107.3
5.6
54.1
43.8
33.5
-
-
-
100.2
6.3
51.0
40.7
30.4
-
-
-
72 97.0
5.5
67.0
56.7
46.4
36.0
-
-
90.5
6.2
64.0
53.7
43.4
33.1
-
-
67 86.8
5.4
79.9
69.6
59.3
49.0
38.6
-
80.7
6.2
77.0
66.7
56.4
46.1
35.8
-
62 79.1
5.4
79.1
79.1
70.8
60.5
50.2
39.8
74.4
6.1
74.4
74.4
66.2
55.9
45.6
35.3
57 79.5
5.4
79.5
79.5
71.2
60.9
50.5
40.2
74.1
6.1
74.1
74.1
65.9
55.6
45.3
35.0
2625
77 109.3
5.6
62.1
47.9
36.1
-
-
-
102.1
6.3
60.4
44.6
32.9
-
-
-
72 98.9
5.5
73.6
61.8
50.1
38.3
-
-
92.1
6.2
70.4
58.7
47.0
35.3
-
-
67 88.4
5.4
85.0
75.8
64.0
52.3
40.5
-
82.2
6.2
80.3
72.8
61.1
49.4
37.7
-
62 80.6
5.4
80.6
80.6
76.5
64.7
53.0
41.2
75.8
6.1
75.8
75.8
71.7
60.0
48.3
36.6
57 81.0
5.4
81.0
81.0
76.9
65.1
53.4
41.6
75.5
6.1
75.5
75.5
71.3
59.7
48.0
36.3
3000
77 111.3
5.6
70.1
52.0
38.8
-
-
-
104.0
6.3
69.8
48.5
35.5
-
-
-
72 100.7
5.5
80.1
66.9
53.8
40.6
-
-
93.8
6.3
76.8
63.7
50.6
37.6
-
-
67 90.1
5.5
90.1
81.9
68.7
55.6
42.4
-
83.7
6.2
83.7
78.9
65.8
52.7
39.6
-
62 82.1
5.4
82.1
82.1
82.1
69.0
55.8
42.7
77.2
6.2
77.2
77.2
77.2
64.1
51.1
38.0
57 82.5
5.4
82.5
82.5
82.5
69.4
56.2
43.1
76.8
6.2
76.8
76.8
76.8
63.8
50.7
37.6
3375
72 102.1
5.6
86.6
72.2
57.8
43.4
-
-
95.0
6.3
82.6
68.3
54.1
39.9
-
-
67 91.3
5.5
91.3
87.2
73.8
59.4
45.0
-
84.8
6.2
84.8
82.4
70.3
56.1
41.8
-
62 83.3
5.4
83.3
83.3
83.3
68.8
54.4
40.0
78.2
6.2
78.2
78.2
78.2
63.9
49.7
35.5
57 83.7
5.5
83.7
83.7
83.7
69.3
54.8
40.4
77.8
6.2
77.8
77.8
77.8
63.6
49.4
35.1
3750
72 103.5
5.6
93.2
77.5
61.8
46.1
-
-
96.2
6.3
88.4
73.0
57.6
42.2
-
-
67 92.6
5.5
92.6
92.6
79.0
63.3
47.6
-
85.8
6.3
85.8
85.8
74.8
59.4
44.0
-
62 84.4
5.5
84.4
84.4
84.4
68.7
53.0
37.3
79.2
6.2
79.2
79.2
79.2
63.8
48.4
33.0
57 84.8
5.5
84.8
84.8
84.8
69.1
53.4
37.7
78.8
6.2
78.8
78.8
78.8
63.4
48.0
32.6