Data Sheet for Product

10 of 13 Siemens Industry, Inc.
Unit Size 312
1-Row Coil
Airflow, CFM
1500 2000 3000 4200
GPM Heating Capacity (MBH)
Waterside
Head Loss
(ft. wg.)
2 48.6 53.7 60.6 66.0 1.22
3 54.1 60.6 69.9 77.4 2.66
4 57.4 64.8 75.6 84.6 4.6
5 59.5 67.6 79.4 89.5 7.07
6 61.0 69.5 82.2 93.1 10.0
7 62.2 71.0 84.3 95.8 13.48
8 63.0 72.2 85.9 98.0 17.42
10 64.3 73.9 88.4 101.2 26.76
Air Side Pressure Drop (Inches WC)
0.04 0.06 0.12 0.22
Unit Size 312
2-Row Coil
Airflow, CFM
1500 2000 3000 4200
GPM Heating Capacity (MBH)
Waterside
Head Loss
(ft. wg.)
2 69.3 76.3 85.2 91.6 0.87
3 80.8 91.0 104.8 115.2 1.89
4 87.9 100.3 117.8 131.6 3.3
5 92.6 106.7 127.0 143.6 5.07
6 96.1 111.4 134.0 152.8 7.19
7 98.7 115.0 139.4 160.0 9.68
8 100.8 117.9 143.6 165.8 12.52
10 103.8 122.1 150.1 174.6 19.25
Air Side Pressure Drop (Inches WC)
0.08 0.13 0.27 0.47
Notes: All capacities are based on 180°F entering water temperature and 55°F entering air temperature. For other air and water inlet temperature conditions, use the
correction factors shown in Table 1 to multiply the given heating capacity for each size.
1 MBH = 1000 BTU/Hr. MBH required = 0.00108 x CFM x Temperature rise.
Table 1. Capacity Correction Data for 1 and 2-Row Hot Water Reheat Coils
Entering
Air Temp
(°F)
Entering Water Temperature (°F)
Entering
Air Temp
(°F)
90 100 110 120 130 140 150 160 170 180 190 200 210
45 0.36 0.44 0.52 0.60 0.68 0.76 0.84 0.92 1.00 1.08 1.16 1.24 1.32 45
50 0.32 0.40 0.48 0.56 0.64 0.72 0.80 0.88 0.96 1.04 1.12 1.20 1.28 50
55 0.28 0.36 0.44 0.52 0.60 0.68 0.76 0.84 0.92 1.00 1.08 1.16 1.24 55
60 0.24 0.32 0.40 0.48 0.56 0.64 0.72 0.80 0.88 0.96 1.04 1.12 1.20 60