GE Merlin User Manual

WORKSHEET - HOW TO DETERMINE RATE OF FLOW FROM THE MERLIN SYSTEM - NORTH AMERICAN
Enter Your Values
Inlet Water TDS (measured) ppm
Inlet Water Temperature °F
Inlet Pressure psi
3/8-inch Tubing feet long
Obstructions in Permeate Line
Elevation Difference Between Merlin and Faucet feet
Post Filter?
Faucet?
Assigned Values
Pressure Drop per Obstruction 0.5 psi
Pressure Drop per Postfilter 3 psi
Pressure Drop in Elevation 0.43 psi per ft
(feet Faucet is above Merlin)
1. Determine the Inlet TDS = ppm
2. Determine the Inlet Water Temperature = °F
3. Determine the Net Driving Pressure of the Merlin system
Net Driving Pressure = Inlet Pressure - System Pressure Drop (Follow instructions below)
3A. Calculate the Flow Rate Adjustment Factor
This factor will be used with Table 1 to adjust the TDS of Inlet Water from 750 ppm to ppm.
-
0.0002
(
ppm
)
+ 0.15 = gpm
3B. Calculate the Tubing Pressure Drop
Inlet Pressure = psi
Water Temp = °F
Use Table 1 to estimate flow rate, 750 ppm NaCl @ °F and psi =
gpm
Adjust Table data for actual TDS using the Flow Rate Adjustment Factor gpm
Tubing Flow Rate = gpm
+ gpm = gpm @ ppm NaCl
Use Figure 4 to determine the pressure drop for 1 ft. tubing = psi
T
ubin
g
Pressure Drop for ft = ft x psi = psi
3C. Calculate the Obstruction Pressure Drop
obstructions X (0.5 psi) =
psi
3D. Calculate Elevation Pressure Drop
f
eet elevation X 0.43 psi
/f
t = psi
3E. Calculate Postfilter Pressure Drop
postfilter X 3 psi =
psi
3F. Calculate Faucet Pressure Drop
psi - psi - psi - psi - psi = psi
Use Table 1 to estimate flow rate, 750 ppm NaCl @ °F and psi = gpm
Adjust Table Data for actual TDS using the Flow Rate Adjustment Factor gpm
gpm + gpm = gpm @ ppm NaCl
Use Figure 8 and the Inlet Flow Rate of gpm to estimate the Faucet Pressure Drop =
psi
3G. Calculate the System Pressure Drop
(System Pressure Drop = Tubing PD + Obstruction PD + Elevation PD + Postfilter PD + Faucet PD
psi + psi + psi + psi + psi = psi
psi
3H. Determine the Net Driving Pressure
(Net Driving Pressure = Merlin Inlet Pressure - System Pressure Drop)
psi - psi =
psi
4. Determine the Merlin Flow Rate
Use Table 1 to estimate flow rate, 750 ppm NaCl @ psi and °F = gpm
Adjust Table Data for actual TDS using the Flow Rate Adjustment Factor gpm
gpm + gpm = gpm
TOTAL MERLIN FLOW RATE = gpm
Actual results may vary. Membrane performance may vary ± 15%.

GE Merlin Specifications

General

Brand	GE
Model	Merlin
Category	Water Filtration Systems
Language	English