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16. HOT WATER APPLICATION
When the pump-motor operates in water hotter than 95°F (35°C), a flow rate of at least 11.5 ft/sec is required. When
selecting the motor to drive a pump in over 95°F (35°C) water, the motor horsepower must be de-rated per the
following procedure.
Using next Table to determine pump GPM required for different well or sleeve diameters.
If necessary, add a flow sleeve to obtain at least 11.5 ft/sec flow rate.
Table 4: Minimum GPM required for motor cooling in water above 95°F (35°C)
Minimum GPM required for motor cooling in water above 95°F (35°C)
4"
5"
6"
7"
8"
The table shows minimum flow rates, in GPM, for various well diameters and motor sizes
17. CONTROL BOX MOUNTING
Single phase submersible control boxes feature NEMA 3R enclosures for indoor or outdoor mounting. They should be
mounted in a vertical position as relay manufacturers recommend correct relay
positioning for proper, trouble-free operation.
Control boxes should be shaded from direct sunlight in areas where temperatures exceed 95°F (35°C) as excessive
heat may dry out capacitors and shorten their life. It is advisable to paint the enclosure white if outside in very hot,
sunny climates.
Casing or Sleeve
I.D. Inches (mm)
102
127
152
178
203
4MWP
4" Submersible Motors
4" Motor (1/2-10Hp)
6" Motor
11.5 ft/sec (3.2m/sec)
GPM (l/min)
75 (283)
330 (1244)
650 (2450)
86 (325)
122 (461)
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