Performance data
42BHC,BVC AIRFLOW CORRECTION FACTORS
CFM RATIO | TOTAL (Ct) | SENSIBLE (Cs) | |
(Actual/Base) | |||
|
| ||
1.40 | 1.25 | 1.26 | |
1.35 | 1.22 | 1.23 | |
1.30 | 1.19 | 1.20 | |
1.25 | 1.16 | 1.17 | |
1.20 | 1.13 | 1.14 | |
1.15 | 1.10 | 1.11 | |
1.10 | 1.07 | 1.08 | |
1.05 | 1.04 | 1.04 | |
1.00 | 1.00 | 1.00 | |
0.95 | 0.97 | 0.97 | |
0.90 | 0.94 | 0.93 | |
0.85 | 0.90 | 0.89 | |
0.80 | 0.86 | 0.85 | |
0.75 | 0.82 | 0.81 | |
0.70 | 0.78 | 0.77 | |
0.65 | 0.74 | 0.72 | |
0.60 | 0.70 | 0.67 | |
0.55 | 0.66 | 0.62 | |
0.50 | 0.62 | 0.57 | |
0.45 | 0.58 | 0.52 | |
0.40 | 0.53 | 0.47 | |
0.35 | 0.48 | 0.42 | |
0.30 | 0.43 | 0.38 | |
0.25 | 0.38 | 0.33 |
NOTE: Use Sensible Heat correction factors when calculating heating capacity.
DIRECT EXPANSION (DX) CORRECTION FACTORS
% OF | CORRECTION FACTOR | |
NOMINAL CFM | Total | Sensible |
80 | 0.95 | 0.93 |
90 | 0.97 | 0.96 |
100 | 1.00 | 1.00 |
110 | 1.02 | 1.04 |
120 | 1.05 | 1.08 |
Consult factory for values outside of table.
DX Total Capacity (MBtuh) = Base Et x Total Correction Factor
DX Sensible Capacity (MBtuh) = Base Es x Sensible Correction Factor
%of Nominal Cfm = Actual Cfm (from Fan Performance table) ÷ Nominal Cfm
ALTITUDE COOLING CORRECTION FACTORS
ELEVATION (ft) | TOTAL HEAT (Et) | SENSIBLE HEAT (Es) |
1000 | 0.99 | 0.96 |
2000 | 0.98 | 0.93 |
3000 | 0.97 | 0.89 |
4000 | 0.96 | 0.86 |
5000 | 0.94 | 0.83 |
6000 | 0.93 | 0.80 |
7000 | 0.92 | 0.77 |
8000 | 0.91 | 0.75 |
9000 | 0.90 | 0.73 |
42BHC,BVC HOT WATER CAPACITY CORRECTION FACTORS
ENTERING AIR |
|
|
| ENTERING WATER TEMPERATURE (F) |
|
|
| ||||
TEMPERATURE (F) | 100 | 110 | 120 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 |
50 | 0.455 | 0.545 | 0.636 | 0.727 | 0.818 | 0.909 | 1.000 | 1.091 | 1.182 | 1.273 | 1.364 |
55 | 0.409 | 0.500 | 0.591 | 0.682 | 0.773 | 0.864 | 0.955 | 1.045 | 1.136 | 1.227 | 1.318 |
60 | 0.363 | 0.455 | 0.545 | 0.636 | 0.727 | 0.818 | 0.909 | 1.000 | 1.091 | 1.182 | 1.273 |
65 | 0.318 | 0.409 | 0.500 | 0.591 | 0.682 | 0.773 | 0.864 | 0.955 | 1.045 | 1.136 | 1.227 |
70 | 0.272 | 0.363 | 0.455 | 0.545 | 0.636 | 0.727 | 0.818 | 0.909 | 1.000 | 1.091 | 1.182 |
75 | 0.227 | 0.318 | 0.409 | 0.500 | 0.591 | 0.682 | 0.773 | 0.864 | 0.955 | 1.045 | 1.136 |
80 | 0.182 | 0.272 | 0.363 | 0.455 | 0.545 | 0.636 | 0.727 | 0.818 | 0.909 | 1.000 | 1.091 |
NOTES:
1.Leaving air temperature not to exceed 104 F with standard motor.
2.Base capacity ratings based on 180 F entering water temperature and 70 F entering air temperature.
3.Hot Water Heating Capacity (MBtuh) = Rated Heating Capacity x Hot Water Capacity Correction Factor x Sensible Airflow Correc- tion Factor.
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