Correction Factors & Design Limits; Correction Factor Tables - Omega VSHP SERIES Product Manual

8. CORRECTION FACTORS & DESIGN LIMITS

8.1 Correction Factor Tables

Entering Air Correction Factors for Cooling Performance
Total
EAT Wet
Cooling Watts
Bulb ( F)
Capacity (W)
(BTUh)
55 0.770 0.989
60 0.873 0.995
65 0.976 0.998
66.2 1.000 1.000
67 1.016 1.000
70 1.077 1.003
75 1.180 1.006
S = Sensible Cooling capacity is equal to Total cooling at conditions shown
The cooling capacity based on 80.6ºF DB and 66.2ºF WB entering air.
Actual = Catalog Data x Correction Factor (CF)
EAT- Entering Air Temperature
EWT - Entering Water Temperature
DB - Dry Bulb
WB - Wet Bulb
THR - Total Heat of Rejection
THA - Total Heat of Absorption
Entering Air Correction Factors for Heating Performance
EAT Dry Bulb ( F)
45
50
55
60
65
68
70
75
80
The heating capacity based on 68ºF DB entering air.
Entering air correction factors table is used to correct the catalog values if the desired EAT is outside of rated EAT. Calculate de-
sired EAT based on the "EAT Wet Bulb" and "EAT Dry Bulb" columns. Multiply the catalog results by the value corresponding to
the design EAT and the desired output.
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Sensible Cooling (BTUh)
THR
(BTUh)
65 70
0.878 0.838 1.038
0.924 0.609 0.842
0.984 0.636
1.000 0.590
1.013 0.553
1.058
1.145
Total Heating Capacity
(BTUh)
1.077
1.061
1.044
1.027
1.010
1.000
0.993
0.978
0.958
OMEGA-VSHP.F-PGD-1904 | OME GA
COOLING
EAT Dry Bulb ( F)
75 80 80.6
S S S
1.053 1.247 1.283
0.844 1.054 1.085
0.798 1.008 1.000
0.762 0.971 1.010
0.639 0.845 0.883
0.639 0.680
HEATING
Watts (W)
0.768
0.818
0.868
0.918
0.968
1.000
1.023
1.071
1.124
85 90 95
S S S
S S S
1.260 S S
1.215 1.477 S
1.177 1.365 S
1.051 1.257 1.440
0.839 1.039 1.252
THA (BTUh)
1.155
1.123
1.088
1.055
1.021
1.000
0.987
0.955
0.915
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