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036-21300-002-A-0905
8 Unitary Products Group
NOTE: Steam rate (lb./hr.) = 1.025 x MBH
CAUTION: Do NOT operate a motor above its nominal HP rating when a unit is equipped with a steam coil acces-
sory.
NOTE: Water Temperature Drop,
0
F = 2 x MBH
CAUTION: Do NOT operate a motor above its nominal HP rating when a unit is equipped with a hot water coil accessory.
TABLE 5: STEAM COIL CAPACITY
1
, MBH@2 PSIG
2
STEAM COIL
MODEL
UNIT MODEL CFM
DRY BULB TEMPERATURE OF AIR ENTERING COIL, ºF
10 30 50 70
1NF0450 060
1600 104.0 94.0 83.9 73.9
2000 115.2 104.0 93.1 81.9
2400 124.9 113.0 100.9 89.0
1NF0451
090
2400 172.2 155.5 139.1 122.4
3000 191.2 172.6 154.3 136.0
3600 207.5 187.1 167.4 147.4
120
3200 196.4 177.6 158.8 140.0
4000 217.3 195.3 175.3 154.8
4800 236.1 212.9 190.4 167.8
1NF0452 180
4800 298.2 268.4 236.7 211.5
6000 329.1 297.0 265.6 234.1
7200 356.4 321.8 287.9 254.0
1. These capacities do not include any blower motor heat.
2. Multiply these capacities by the following factors to correct for higher steam pressures.
Steam Pressure, psig 5 10 15 20 25
Capacity correction factor 1.05 1.12 1.19 1.25 1.30
TABLE 6: HOT WATER CAPACITY
1
, MBH
WATER COIL MODEL UNIT MODEL GPM CFM
ENTERING WATER TEMP. MINUS ENTERING AIR TEMP., ºF
70 90 110 130 150
1HW0450 060 10
1600 46.5 60.4 74.6 89.0 101.8
2000 51.7 67.2 83.0 99.2 113.4
2400 56.0 73.0 90.4 107.9 123.3
1HW0451
090 15
2400 78.0 101.3 124.7 148.5 169.7
3000 87.7 113.3 139.6 166.6 190.4
3600 95.5 124.0 153.0 182.1 208.1
120 15
3200 90.3 117.1 144.6 172.1 196.6
4000 100.2 130.2 160.7 191.3 218.6
4800 108.3 140.9 174.3 207.5 237.4
1HW0452 180 20
4800 135.5 175.1 215.8 257.4 294.1
6000 150.0 195.0 240.3 285.9 326.6
7200 162.4 210.8 260.4 309.8 354.3
1. These capacities do no include any blower motor heat.
TABLE 7: PRESSURE DROP VS. GPM
1HW0450
GPM 10 20 30
Pressure Drop, PSI .10 .32 .67
1HW0451
GPM 15 30 45
Pressure Drop, PSI .17 .58 1.22
1HW0452
GPM 20 40 60
Pressure Drop, PSI .20 .67 1.41
TABLE 8: CAPACITY CORRECTION VS. GPM
1HW0450
GPM 20 30
Capacity Correction 1.12 1.16
1HW0451
GPM 30 45
Capacity Correction 1.11 1.15
1HW0452
GPM 40 60
Capacity Correction 1.12 1.17