23
Performance
Data
Table 23-1  Electric Heat Air Temperature Rise (Degrees F) English
Heater Total CFM
Input (kW) MBh 7000 8000 9000 10000 11000 12000 13000 14000 15000 16000 17000
26.9 92 12.1 10.6 9.4 8.5 7.7 7.1 
40.4 138 18.2 15.9 14.1 12.7 11.6 10.6 9.8 9.1 8.5 7.9 7.5
53.8 184 24.2 21.2 18.8 16.9 15.4 14.1 13.0 12.1 11.3 10.6 10.0
67.3 230 30.2 26.5 23.5 21.2 19.2 17.6 16.3 15.1 14.1 13.2 12.5
80.7 276 25.4 23.1 21.2 19.5 18.1 16.9 15.9 14.9
Notes:
1. Air temperature rise = (kW x 3413)/(scfm x 1.085).
2. All heaters on constant volume units provide 2 increments of capacity.
3. Air temperature rise in this table are based on heater operating at 415 volts.
Table 23-2  Electric Heat Air Temperature Rise (Degrees Celsius) Metric
Heater L/s
Input (kW) 3300 3780 4250 4720 5190 5660 6140 6610 7080 7550 8020
26.9 6.8 5.9 5.3 4.7 4.3 4.0 
40.4 10.2 8.9 7.9 7.1 6.5 5.9 5.5 5.1 4.8 4.5 4.2
53.8 13.6 11.9 10.5 9.5 8.6 7.9 7.3 6.8 6.3 5.9 5.6
67.3 17.0 14.8 13.2 11.9 10.8 9.9 9.1 8.5 7.9 7.4 7.0
80.7 14.2 13.0 11.9 11.0 10.2 9.5 8.9 8.4
Notes:
1. Air temperature rise in this table are based on heater operating at 415 volts.
2. All heaters on constant volume units provide 2 increments of capacity.
Table 23-4  Natural Gas Heating Capacities
Heat Input MBh (KW) Heating Output MBh (KW) Air Temp. Rise,
Tons Unit Model No. (See Note 1) (See Note 1) F (C)
YCD/YCH275**L
22.9-29.2 YCD/YCH300**L 290,000 (85) 243,000 (69) 10-40 (-12.2 , 4.4)
YCD/YCH350**L
YCD/YCH275**H
22.9-29.2 YCD/YCH300**H 500,000 (147) 405,000 (119) 25-55 (-3.9 , 12.8)
YCD/YCH350**H
YCD/YCH400**L
33.3-42.7 YCD/YCH500**L 335,000 (98) 271,350 (80) 5-35 (-15 , 1.6)
YCD/YCH400**H
33.3-42.7 YCD/YCH500**H 670,000 (196) 542,700 (159) 20-50 (-6.7 , 10)
Note:
1. Total heating capacity.
Table 23-3  Available Electric Heat KWRanges
Nominal Nominal Voltage (v)
Unit Size
Tons 380 415
22.9 23-56 27-67
25.0 23-56 27-67
29.2 23-56 27-67
33.3 34-68 40-81
42.7 34-68 40-81
Notes:
1. KW ranges in this table are based on heater
operating at nominal voltages 380 or 415.