Dometic SPOTZERO SZIII 2000, User Manual & Installation Manual

Page: 21 / 59

Temperature Correction Factors for Membrane Production
The reverse osmosis process is also heavily dependent on the input water temperature. This is
because higher temperature water has a reduced viscosity which makes it easier for the water to
permeate the RO membrane. Because of this, at different temperatures the unit will either produce
more or less product than its rated production at 77°F. To find the temperature correction factor (TCF)
the table below may be used. Simply divide the listed standard system flow rate at 77°F by the
temperature correction factor. The result is the permeate flow at the desired temperature. (See example
below)
Refence: °F = (°C x 9/5) + 32
Corrected Flow Rate = (Measured Flow Rate) *(TCF @ Feed Water Temp.)
Example:
1.25 gpm @ 59° F (1.25÷1.42=.88 gpm)
1.25 gpm @ 77° F (1.25÷1=1.25 gpm)
1.25 gpm @ 84° F (1.25÷0.89=1.4 gpm)
21