GE E4LE - Manual (Page 14)

The concentrate valve is drilled, and when completely closed the machine is
running at the correct concentrate flow for a 75% recovery (Table 2.4, Flow
Specifications for E4-Series Machines).
If the temperature of the inlet feed water is not 77°F (25°C) use the
Temperature Correction Factor Table (Technote 113). The proper adjustment
of the recycle and concentrate valves are critical to the correct operation of
the machine.
CAUTION: Optimum recovery will vary according to water quality.
2.13 Temperature Correction Factor
If the temperature of the inlet feed water is not 77°F (25°C), refer to Technote 113 for
Temperature Correction Factors.
NOTE: Optimum recovery will vary according to water quality.
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