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Service Reference Manual TROUBLESHOOTING
9-9
SRM-HW/HWC 8/99
Performance
Performance Checkout
HW/HWC chassis come with a pre-charged chassis assembly. The
chassis assembly is designed in a way that the unit may be run indepen-
dently of the HWC unit. When the chassis is run on a floor or bench, the
performance measurements will be affected due to the change in static
pressures, recirculated air, excessive temperatures and equal ambient
temperatures from indoor to outdoor.
Two sets of tables are provided in this section to address these issues.
Tables 9-1 to 9-4 are to be used when the chassis is still installed in the
complete unit. Tables 9-5 and 9-6 are to be used when the chassis is run
independently outside of the unit.
Note: Pressures may vary +/– 10 psi. Temperatures may vary =/– 2-3°F.
Performance Tests (Chassis Installed in Unit)
Total
Air Vol.
(CFM)
Enter.
DB/WB
Suction
Pressure
Suction
Temp.
Liquid
Temp.
Suction
Pressure
Suction
Te mp .
Liquid
Te mp .
Suction
Pressure
Suction
Te mp .
Liquid
Te mp .
Suction
Pressure
Suction
Temp.
Liquid
Temp.
Outdoor Air Temperature Entering Outdoor Coil
85°
95° 105° 115°
400
450
500
400
450
500
400
450
500
75°/63°
80°/67°
85°/71°
81
49 87 82 49 97 84 50 107 85 51 117
83
54 87 84 50 97 86 51 107 87 52 117
85 60 87 86 52 97 88 52 107 89 53 117
87
63 87 88 53 97 89 53 107 91 54 117
88 68 88 90 58 97 91 54 107 93 55 117
90
73 88 92 63 97 93 57 107 95 56 117
92
74 88 93 64 97 94 56 108 96 57 117
94 79 88 95 71 97 96 62 108 98 58 117
96 84 88 97 74 97 98 65 108 100 59 117
Based on a normally installed cooling chassis
TABLE 9-1 HWC122 Performance Test (Chassis Installed)
Total
Air Vol.
(CFM)
Enter.
DB/WB
Suction
Pressure
Suction
Temp.
Liquid
Temp.
Suction
Pressure
Suction
Te mp .
Liquid
Te mp .
Suction
Pressure
Suction
Te mp .
Liquid
Te mp .
Suction
Pressure
Suction
Temp.
Liquid
Temp.
Outdoor Air Temperature Entering Outdoor Coil
85°
95° 105° 115°
550
600
650
550
600
650
550
600
650
75°/63°
80°/67°
85°/71°
80
49 96 81 48 106 84 50 114 86 51 123
82
54 96 83 50 106 86 51 114 88 52 123
84
59 96 85 52 106 88 52 114 90 54 124
86
62 98 88 53 106 90 54 115 92 55 124
87
67 98 89 58 107 91 54 116 94 56 125
99
72 98 91 62 107 93 57 116 95 56 125
91 73 99 93 64 107 95 56 116 97 58 125
93
78 99 95 70 108 97 63 117 99 59 126
95 83 99 97 74 108 99 66 117 101 60 126
Based on a normally installed cooling chassis
TABLE 9-2 HWC182 Performance Test (Chassis Installed)