PKGP-PRC004-EN
33
Performance
Data
Table PD-26 — Electric Heater Temperature Rise Correction Factors
% Variation From Nominal Airflow– 20 – 15 – 10 – 5 0 + 5 + 10 + 15 + 20
Temperature Rise Multiplier 1.25 1.17 1.11 1.05 1 0.95 0.91 0.87 0.83
Table PD-25 — Air Temperature Rise Across Electric Heaters (Degrees C)
5 Ton 6 Ton 7.5 Ton 10 Ton
3400 M
3
/H 4100 M
3
/H 5100 M
3
/H 6800 M
3
/H
kW Stages WSC060AD, T WSC072AD, T WSC090AD, T WSC120AD, T
7.5 2 6.6 — — —
8.3 2 7.3 — — —
9.0 2 7.9 — — —
10.9 2 9.6 — — —
11.3 1 — 8.3 6.6 —
12.1 2 10.6 — — —
12.5 1 — 9.1 7.3 —
13.0 2 11.4 — — —
13.5 1 — 9.9 7.9 —
14.4 2 12.6 — — —
16.0 2 14.0 — — —
16.9 2 — 12.4 9.9 7.4
17.2 2 15.1 — — —
18.8 2 — 13.8 11.0 8.3
20.2 2 — 14.8 11.8 8.9
22.6 2 — 16.5 13.2 9.9
25.0 2 — 18.3 14.6 11.0
26.9 2 — 19.7 15.7 11.8
33.9 2 — — — 14.9
37.5 2 — — — 16.5
40.4 2 — — — 17.7
Note:
For minimum design airflow, see performance table for each unit.
To calculate temp rise at differrent airflow, use following formula:
Temp. Rise (C
0
) across Elect Htr = (kW x 2985) / (M
3
/H)
Table PD-25a — Air Temperature Rise Across Electric Heaters (Degrees F)
5 Ton 6 Ton 7.5 Ton 10 Ton
2000 CFM 2400 CFM 3000 CFM 4000 CFM
kW Stages WSC060AD, T WSC072AD, T WSC090AD, T WSC120AD, T
7.5 2 11.9 — — —
8.3 2 13.1 — — —
9.0 2 14.2 — — —
10.9 2 17.2 — — —
11.3 1 — 14.9 11.9 —
12.1 2 19.1 — — —
12.5 1 — 16.5 13.2 —
13.0 2 20.5 — — —
13.5 1 — 17.8 14.2 —
14.4 2 22.8 — — —
16.0 2 25.3 — — —
16.9 2 — 22.3 17.8 13.4
17.2 2 27.2 — — —
18.8 2 — 24.8 19.8 14.9
20.2 2 — 26.6 21.3 16.0
22.6 2 — 29.8 23.8 17.9
25.0 2 — 32.9 26.3 19.8
26.9 2 — 35.4 28.3 21.3
33.9 2 — — — 26.8
37.5 2 — — — 29.6
40.4 2 — — — 31.9
NOTE:
For minimum design airflow, see performance table for each unit.
To calculate temp rise at differrent airflow, use following formula:
Temp. Rise (F
0
) across Elect Htr = (kW x 3414) / ( 1.08 x CFM)
