Product data

Catalog 724-2 19
Performance Data PSC
Four-Pipe Systems - Steam Preheat or Reheat
All performance measured on high speed tap, 115 V. Medium
and low-speed capacities are approximately 88% and 68%
respectively of the high-speed capacity.
Q/ITD =
MBh (kW)
Saturated steam temp – Entering air temp
To determine heating capacities at different entering steam
pressure or entering air temperature, compute the new Inlet
Temperature Differential (ITD) and multiply it by the Q/
ITD shown. See Table 5 to determine the saturated steam
temperatures at various entering steam pressures.
For more accurate values, use Daikin Tools selection
program available from your Daikin Applied representative.
Table 4: Steam coil performance with free-discharge motor
Unit Size Steam Coil Size
Heating Capacity MBH (kW) Q / ITD @ 2 PSIG
2 PSIG (115 kPa) 5 PSIG (136 kPa) MBH / °F
02 Standard Capacity 15.1 16.2 0.0952
03 Standard Capacity 16.4 17.6 0.1034
04 Standard Capacity 22.0 23.6 0.1386
06 Standard Capacity 27.9 34.7 0.1756
08 Standard Capacity 29.1 38.4 0.1827
10 Standard Capacity 32.1 44.2 0.2019
12 Standard Capacity 41.5 59.5 0.2610
Table 5: Steam properties
Steam Pressure PSIG (kPa) 2 (13) 3 (20) 4 (27) 5 (34)
Sat. Steam Temp. ºF (ºC) 219 (104) 222 (106) 224 (107) 227 (108)
Latent Heat Btu/Lb (kJ/kg) 966 (2245) 964 (2242) 962 (2239) 961 (2233)