OMEGA-VSHP.F-PGD-1904 | OMEGA
www.omega-heatpump.com
39
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
8. CORRECTION FACTORS & DESIGN LIMITS
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.
8.1 Correction Factor Tables
Entering Air Correction Factors for Cooling Performance
EAT Wet
Bulb ( F)
COOLING
Total
Cooling
Capacity
(BTUh)
Watts
(W)
THR
(BTUh)
Sensible Cooling (BTUh) EAT Dry Bulb ( F)
70
75
80
80.6
90
95
60
0.873
0.995
0.924
0.842
1.053
1.247
1.283
S
S
65
0.976
0.998
0.984
0.636
0.844
1.054
1.085
S
S
67
1.016
1.000
1.013
0.553
0.762
0.971
1.010
1.365
S
70
1.077
1.003
1.058
0.639
0.845
0.883
1.257
1.440
75
1.180
1.006
1.145
0.639
0.680
1.039
1.252
55
0.770
0.989
0.878
1.038
S
S
S
S
S
66.2
1.000
1.000
1.000
0.590
0.798
1.008
1.000
1.477
S
65
0.838
0.609
85
S
S
1.260
1.215
1.177
1.051
0.839
Entering Air Correction Factors for Heating Performance
EAT Dry Bulb ( F)
HEATING
Total Heating Capacity
(BTUh)
Watts (W)
THA (BTUh)
45
1.077
0.768
1.155
50
1.061
0.818
1.123
55
1.044
0.868
1.088
60
1.027
0.918
1.055
65
1.010
0.968
1.021
68
1.000
1.000
1.000
70
0.993
1.023
0.987
75
0.978
1.071
0.955
80
0.958
1.124
0.915
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.
