IOMM AGZ-5
AGZ 026B through 130B
19
Altitude Correction Factors
Performance tables are based at sea level. Elevations other than sea level affect the performance of
the unit. The decreased air density will reduce condenser capacity consequently reducing the unit's
performance. For performance at elevations other than sea level, refer to Table 11 or Table 12.
Evaporator Temperature Drop Factors
Performance tables are based on a 10°F (5°C) temperature drop through the evaporator. Adjustment
factors for applications with temperature ranges from 6°F to 16°F (3.3°C to 8.9°C) are in Table 11 or
Table 12.
Temperature drops outside this 6°F to 16°F (3.3°C to 8.9°C) range can affect the control system's
capability to maintain acceptable control and are not recommended.
The maximum water temperature that can be circulated through the evaporator in a non-operating
mode is 100°F (37.8°C).
Fouling Factor
Performance tables are based on water with a fouling factor of
)
/
0176
.
0
(
/
0001
.
0
2
2
kW
C
m
or
BTU
F
hr
ft
°
×
°
×
×
per ARI 550/590-98.
As fouling is increased, performance decreases. For performance at other than 0.0001 (0.0176)
fouling factor, refer to Table 11 or Table 12.
Foreign matter in the chilled water system will adversely affect the heat transfer capability of
the evaporator and could increase the pressure drop and reduce the water flow. Maintain
proper water treatment to provide optimum unit operation.
Table 11, Capacity and Power Derates, Models AGZ 026 to 070
Fouling Factor
Chilled Water Delta T
0.0001
(0.0176) 0.00025
(0.044) 0.00075
(0.132) 0.00175
(0.308)
Altitude
°F
°C Cap. Power Cap. Power Cap. Power Cap. Power
6
3.3 0.978 0.993 0.975 0.991 0.963 0.987 0.940 0.980
8
4.4 0.989 0.996 0.986 0.994 0.973 0.990 0.950 0.983
10
5.6 1.000 1.000 0.996 0.999 0.984 0.994 0.961 0.987
12
6.7 1.009 1.003 1.005 1.001 0.993 0.997 0.969 0.990
14
7.7 1.018 1.004 1.014 1.003 1.002 0.999 0.978 0.991
Sea
Level
16
8.9 1.025 1.007 1.021 1.006 1.009 1.001 0.985 0.994
6
3.3 0.977 1.001 0.973 1.000 0.961 0.996 0.938 0.989
8
4.4 0.987 1.006 0.984 1.004 0.971 1.000 0.948 0.993
10
5.6 0.998 1.009 0.995 1.007 0.982 1.003 0.959 0.996
12
6.7 1.007 1.011 1.004 1.010 0.991 1.006 0.967 0.998
14
7.7 1.014 1.014 1.011 1.013 0.998 1.009 0.974 1.001
2000 feet
16
8.9 1.022 1.016 1.018 1.014 1.005 1.010 0.981 1.003
6
3.3 0.973 1.011 0.970 1.010 0.957 1.006 0.935 0.998
8
4.4 0.984 1.014 0.980 1.013 0.968 1.009 0.945 1.001
10
5.6 0.995 1.019 0.991 1.017 0.979 1.013 0.955 1.005
12
6.7 1.004 1.021 1.000 1.020 0.987 1.016 0.964 1.008
14
7.7 1.011 1.024 1.007 1.023 0.994 1.018 0.971 1.011
4000 feet
16
8.9 1.018 1.027 1.014 1.026 1.002 1.021 0.978 1.014
6
3.3 0.969 1.021 0.966 1.020 0.954 1.016 0.931 1.008
8
4.4 0.980 1.026 0.977 1.024 0.964 1.020 0.942 1.013
10
5.6 0.989 1.029 0.986 1.027 0.973 1.023 0.950 1.015
12
6.7 0.998 1.033 0.995 1.031 0.982 1.027 0.959 1.020
14
7.7 1.007 1.036 1.004 1.034 0.991 1.030 0.967 1.022
6000 feet
16
8.9 1.014 1.037 1.011 1.036 0.998 1.031 0.974 1.024
Summary of Contents for AGZ026BS
Page 103: ...IOMM AGZ 5 AGZ 026B through 130B 103...
Page 104: ...104 AGZ 026B through 130B IOMM AGZ 5...
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