Filter
Top Products
36
PKGP-PRC003-EN
Table PD-42 — Electric Heater Temperature Rise Correction Factors
% Variation From Nominal CFM - 20 - 15 - 10 - 5 0 +5 +10 +15 +20
Temperature Rise Multiplier 1.25 1.17 1.11 1.05 1.00 0.95 0.91 0.87 0.83
Performance
Data
Table PD-41 — 6-10 Tons Air Temperature Rise Across Electric Heaters (Degrees F)
6 Ton 7½ Ton 10 Ton
2000 3000 CFM 4000 CFM
KW Stages WSC072A3, A4, AW WSC090A3, A4, AW WS120A3,A4,AW
9.00 1 14.2 9.5 —
18.00 1 28.5 19.0 14.2
27.00 2 42.7 28.5 21.3
36.00 2 56.9
1
37.9 28.5
54.00 2 — — 42.7
For minimum design airflow, see airflow performance table for each unit.
To calculate temp rise at different air flow, use following formula:
Temp. Rise across Elect. Htr =
Note:
1. Minimum allowable aiflow for a 6 ton with a 36.0 KW heater is 2450 cfm.
kWx3414
1.08xCFM
Table PD-40 — Air Temperature Rise Across Electric Heaters (Degree F)
3 Ton 4 Ton 5 Ton
1200 CFM
1
1600 CFM
2
2000 CFM
3
Single Phase Three Phase Single Phase Three Phase Single Phase Three Phase
KW Stages WSC036A11 WSC036A3,A4,AW WSC048A1 WSC048A3,A4,AW WSC060A1 WSC060A3,A4,AW
5.00 1 13.2 — 9.9 — 7.9 —
6.00 1 — 15.8 — 11.9 — 9.5
10.00 2 26.3 — 19.8 — 15.8 —
12.00 2 — 31.6 — 23.7 — 19.0
13.80 2 36.4 — 27.3 — 21.8 —
17.40 2 — 45.8 — 34.4 — 27.5
17.60 2 — — 34.8 — 27.8 —
23.00 2 — — — — — 36.4
For minimum design airflow, see airflow performance table for each unit.
To calculate temp rise at different air flow, use following formula:
Temp. Rise across Elect. Htr =
Notes:
1. The minimum allowable airflow for a 3 ton with a 17.4 KW heater is 1020 CFM.
2. The minimum allowable airflow for a 4 ton with a 17.4 or 17.6 KW heater is 1440 CFM.
3. The minimum allowable airflow for a 5 ton with a 23.0 KW heater is 1900 CFM.
kWx3414
1.08xCFM