Pressure Drop Vs. Gpm - York NE090 Technical Manual

679948-YTG-A-0111
TABLE 7: STEAM COIL CAPACITY
STEAM COIL
UNIT MODEL
MODEL
1NF0451
1NF0452
1NF0453
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
Capacity correction factor
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. Although these coils are suitable for higher pressures, steam above 25 psig will provide too much heat and
could damage the blower motor.
TABLE 8: HOT WATER CAPACITY
WATER COIL MODEL
1HW0451
1HW0452
1HW0405
1. These capacities do no include any blower motor heat.
NOTE: Water Temperature Drop,
CAUTION: Do NOT operate a motor above its nominal HP rating when a unit is equipped with a hot water coil accessory. Do not use steam in these hot
water coils.
TABLE 9: PRESSURE DROP VS. GPM
GPM
1HW0451
Pressure Drop, PSI
GPM
1HW0452
Pressure Drop, PSI
GPM
1HW0405
Pressure Drop, PSI
Unitary Products Group
1
, MBH@2 PSIG
CFM
2400
090 3000
3600
3200
120 4000
4800
4800
180 6000
7200
6400
240 8000
9600
5
1.06
1
, MBH
UNIT MODEL GPM
090 15
120 15
180 20
240 35

F = 2 x MBH/GPM
15 30 45 -
.17 .58 1.22 -
20 40 60 -
.20 .67 1.41 -
15 35 55 75
0.2 0.8 1.5 2.5
2
DRY BULB TEMPERATURE OF AIR ENTERING COIL, ºF
10 30
172.2 155.5
191.2 172.6
207.5 187.1
196.4 177.6
217.3 195.3
236.1 212.9
298.2 268.4
329.1 297.0
356.4 321.8
402 364
464 419
481 435
10 15
1.12 1.19 1.25
ENTERING WATER TEMP. MINUS ENTERING AIR TEMP., ºF
CFM
70 90
2400 78.0 101.3
3000 87.7 113.3
3600 95.5 124.0
3200 90.3 117.1
4000 100.2 130.2
4800 108.3 140.9
4800 135.5 175.1
6000 150.0 195.0
7200 162.4 210.8
6400 179 229
8000 199 255
9600 220 282
TABLE 10: CAPACITY CORRECTION VS. GPM
GPM
1HW0451
Capacity Correction
GPM
1HW0452
Capacity Correction
GPM
1HW0405
Capacity Correction
50
139.1
154.3
167.4
158.8
175.3
190.4
236.7
265.6
287.9
325
374
388
20 25
1.30
110 130
124.7 148.5
139.6 166.6
153.0 182.1
144.6 172.1
160.7 191.3
174.3 207.5
215.8 257.4
240.3 285.9
260.4 309.8
280 331
312 369
344 407
30 45
1.11 1.15
40 60
1.12 1.17
15 35
0.74 1.00
70
122.4
136.0
147.4
140.0
154.8
167.8
211.5
234.1
254.0
286
330
342
150
169.7
190.4
208.1
196.6
218.6
237.4
294.1
326.6
354.3
382
425
469
- -
- -
- -
- -
55 75
1.04 1.06
9