Trane Precedent PKGP-PRC003-EN User Manual page 36

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