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Table 49. Fresh air damper pressure drop (inches w.c.) — Air-Cooled and Evaporative Condensing
(20, 25 Ton and 24, 29 Ton) Units
Damper Position
CFM
#1
#2
4000
0.03
0.04
0.06
6000
0.03
0.04
0.10
8000
0.19
0.21
0.32
9000
0.30
0.35
0.48
10000
0.45
0.51
0.70
11000
0.62
0.71
0.95
(30, 36 Ton) Units
Damper Position
CFM
#1
#2
6000
0.03
0.04
0.07
8000
0.03
0.05
0.11
10000
0.15
0.19
0.26
11000
0.20
0.25
0.37
12000
0.31
0.36
0.50
13000
0.42
0.48
0.62
(40, 48 Ton) Units
Damper Position
CFM
#1
#2
8000
0.03
0.04
0.08
10000
0.03
0.05
0.11
12000
0.10
0.13
0.21
14000
0.20
0.25
0.37
16000
0.41
0.46
0.60
18000
0.56
0.65
0.74
Compressors Failure!
Unit must be powered and crankcase heaters energized at least 8 hours BEFORE compressors
are started. This will protect the compressors from premature failure.
RT-SVX36G-EN
#3
#4
#5
#6
0.13
0.16
0.33
0.20
0.30
0.90
0.52
0.75
1.75
0.76
1.08
2.40
1.05
1.57
-
1.42
2.15
-
#3
#4
#5
#6
0.15
0.20
0.43
0.21
0.30
0.90
0.43
0.62
1.50
0.60
0.85
1.85
0.79
1.10
2.40
0.97
1.42
-
#3
#4
#5
#6
0.16
0.21
0.52
0.21
0.30
0.90
0.38
0.55
1.40
0.60
0.85
1.85
0.94
1.38
-
1.28
1.92
-
(50, 55 and 59 Ton) Units
Damper Position
CFM
#1
#2
#3
10000
0.03
0.04
0.09
14000
0.09
0.12
0.20
18000
0.31
0.36
0.50
20000
0.45
0.51
0.70
22000
0.58
0.66
0.75
24000
0.75
0.88
1.10
(60, 70, 75 Ton and 73, 80, 89 Ton) Units
Damper Position
CFM
#1
#2
#3
14000
0.03
0.04
0.12
18000
0.19
0.21
0.32
22000
0.45
0.51
0.70
26000
0.70
0.80
1.02
28000
0.88
1.03
1.30
30000
1.05
1.22
1.55
(90 - 130 Ton) Units
Damper Position
CFM
#1
#2
#3
27000
0.31
0.36
0.50
32000
0.55
0.64
0.72
36000
0.75
0.88
1.10
40000
1.00
1.18
1.50
43000
1.20
1.42
1.92
46000
1.40
1.58
2.29
NOTICE:
Unit Start Up
#4
#5
#6
0.18
0.23
0.55
0.35
0.50
1.36
0.79
1.10
-
1.05
1.57
-
1.30
1.95
-
1.75
2.50
-
#4
#5
#6
0.25
0.35
1.05
0.52
0.75
1.75
1.05
1.57
-
1.58
2.30
-
2.20
-
-
2.65
-
-
#4
#5
#6
0.79
1.10
2.40
1.25
1.88
-
1.75
2.50
-
2.50
-
-
-
-
-
-
-
-
135
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