36
Legend and Notes for Tables 10A and 10C
LEGEND
Bhp --- Brake Horsepower Input to Fan
ESP --- External Static Pressure
NOTES:
1. Maximum allowable fan speed for size 25 un its is 1200 rpm . Maximum
allowable fan speed for size 28 and 30 u nits is 1100 rpm.
2. Fan performance is bas ed on deducti ons for wet coil, clean 2-in. filters,
and unit cas i ng. See tab le at rig ht for factory- sup pli ed fi lt er pres s ure drop.
3. Refer to fan motor and drive tables for additional data.
FACTORY-SUPPLIED PRESSURE DROP — ENGLISH
UNIT
AIRFLOW
(Cfm)
PRESSURE DROP
(in. wg)
40RUA*25
40RUQ*25
40RUS*25
6,000 0.12
8,000 0.19
10,000 0.26
40RUA*28
40RUS*28
7,500 0.15
10,000 0.22
12,500 0.30
40RUA*30
40RUS*30
9,000 0.19
12,000 0.29
15,000 0.40
Legend and Notes for Tables 10B and 10D
LEGEND
ESP --- External Static Pressure
NOTES:
1.Maximumallowablefanspeedforsize25unitsis20r/s.Maximum
allowable fan speed for size 28 and 30 units is 18.3 r/s.
2.Fanperformanceisbasedondeductionsforwetcoil,clean51---mm
filters, and u n it casing. See table at right for factory-su pplied filter
pressure drop.
3. Refer to fan motor and drive tables for additional data.
FACTORY-SUPPLIED PRESSURE DROP — SI
UNIT
AIRFLOW
(L/s)
PRESSURE DROP
(Pa)
40RUA*25
40RUQ*25
40RUS*25
2900 32
3800 47
4700 64
40RUA*28
40RUS*28
3500 36
4700 55
5900 76
40RUA*30
40RUS*30
4250 47
5650 71
7050 98
40RU
