Page 8 | AIM Manual | Franklin Electric

2. Determine pump horsepower required from the pump manufacturer's curve.

FIG. 2 MANUFACTURER'S PUMP CURVE

3. Multiply the pump horsepower required by the heat factor multiplier from Table 8.

Table 8 Heat Factor Multiplier at 3 ft/sec (.91 m/sec) Flow Rate

Maximum Water Temperature	1/3 - 5 HP .25 - 3.7 KW	7 1/2 - 30 HP 5.5 - 22 KW	Over 30 HP Over 22 KW
140°F (60°C)	1.25	1.62	2.00
131°F (55°C)	1.11	1.32	1.62
122°F (50°C)	1.00	1.14	1.32
113°F (45°C)	1.00	1.00	1.14
104°F (40°C)	1.00	1.00	1.00
95°F (35°C)	1.00	1.00	1.00

4. Select a rated HP motor on Table 8A whose Service Factor Horsepower is at least the value calculated in Item 3.

Table 8A Service Factor Horsepower

HP	KW	SFHP
1/3	0.25	0.58
1/2	0.37	0.80
3/4	0.55	1.12
1	0.75	1.4
1.5	1.10	1.95
2	1.50	2.5

HP	KW	SFHP
3	2.2	3.45
5	3.7	5.75
7.5	5.5	8.62
10	7.5	11.5
15	11.0	17.25
20	15.0	23.00

HP	KW	SFHP
25	18.5	28.75
30	22.0	34.50
40	30.0	46.00
50	37.0	57.50
60	45.0	69.00
75	55.0	86.25

HP	KW	SFHP
100	75	115.00
125	93	143.75
150	110	175.50
175	130	201.25
200	150	230.00

Hot Water Applications - Example

EXAMPLE: A 6” pump end requiring 39 hp input will pump 124 °F water in an 8” well at a delivery rate of 140 gpm. From Table 7A, a 6” fl ow sleeve will be required to increase the fl ow rate to at least 3 ft/s. Using Table 8, the 1.62 heat factor multiplier is selected because the hp required is over 30 hp and water

Using Table 8, the 1.62 heat factor multiplier is selected because the HP required is over 30 HP and water temperature is above 122°F. Multiply 39 HP x 1.62 (multiplier), which equals 63.2 HP. This is the minimum rated service factor horsepower usable at 39 HP in 124°F. Using Table 8A, select a motor with a rated service factor horsepower above 63.2 HP. A 60 HP motor has a service factor horsepower of 69, so a 60 HP motor may be used.