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FILTER CHANGE AND FLUSHING PROCEDURE (CONTINUED)
RETURN RO TO NORMAL SERVICE
25. After new membrane flush, or initial flush of existing
membrane, make sure that both the reject flush valve
and the permeate sample port valve are closed.
Closed = pointing left.
26. Make sure the tank sampling valve is closed.
27. Make sure tank valve is open.
28. Do a final check. Ensure system inlet and outlet are
returned to service positions: inlet (pointed down),
outlet (pointed up).
NOTE: This filter change process will cause the
customer's equipment to have temporary delay of
use of optimized water systems during the 10 minutes
of flushing. (New RO membrane flushing will cause
extended interruptions to service during flushing.)
18 | PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE
Proof April 18, 2022
reject
closed
closed
flush
valve
permeate
tank
tank
sample
sampling
sampling
port
closed
closed
valve
valve
valve
25
26
(closed)
(closed)
open
open
28
27
FOODSERVICE.PENTAIR.COM
TDS MONITOR
This model of the EZ-RO comes preinstalled with a
TDS (Total Dissolved Solids) monitor. This TDS monitor
measures the combined TDS from the mineral feed
cartridge and blend valve going to the storage tank.
Total Dissolved Solids is the total amount of inorganic
elements, including minerals, salts or metals, dissolved
in a given volume of water, other than the pure
water molecules (H2O) and suspended solids. TDS is
expressed in parts per million (ppm).
Additional hook and loop is supplied to attach the TDS monitor
to another surface within the maximum length of wire.
SPECIFICATIONS
• TDS Range: 0-9990 ppm
• Resolution: 1 ppm (0-999); 10 ppm (1000-9990,
indicated by a blinking 'x10' image)
• Accuracy: +/- 2%
• Cable Length: 24.5" (including sensor)
• Power Source: 2 x 1.5V button cell batteries
(size: 357-A) (included)
• Battery Life: Approx. one year
• Dimensions: 7.6 x 2 x 4.7
USAGE
1. Press the "ON/OFF" button.
2. The monitor will display the TDS level.
3. The displayed TDS will be most accurate after
approximately 10 seconds.
4. Turn off the unit. It will automatically shut off
after 10 min.
CHANGING THE BATTERIES
1. Unscrew the three metal screws (not the orange
plastic screw) on the rear of the unit and remove
the back panel.
2. Remove the batteries.
3. Replace with two new LR44 batteries. Ensure the
polarity is correct.
4. Close the back panel and replace the screws.
RECALIBRATION
Your monitor was factory calibrated to 342 ppm (NaCl).
This level is suitable for most tap water/filtered water
applications. However, you may need to recalibrate
based on your needs, as well as from time-to-time to
ensure best results.
PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE
Proof April 18, 2022
1. Purchase a
calibration
solution from
your dealer
that is correct
for your needs.
2. Disconnect the
T-Fitting from
its hose. Do not remove the sensor from the T!
3. Ensure the orientation of the sensor to the fitting
is correct, as in the illustration.
4. Turn on the monitor and place the T-Fittings (with
the sensor in it) into the calibration solution. You
will get a reading.
5. If the reading on the monitor does not match
the solution, adjust the reading up or down by
gently turning the orange screw on the rear of the
monitor clockwise or counter-clockwise.
6. The monitor should read approximately 10%
below the calibration solution. The monitor is
designed for flowing water and this discrepancy
will compensate for that.
NOTE: If you are calibrating with a flowing solution,
ignore this.
7. Once the reading is correct, turn the monitor off
and remove from the solution.
Your monitor is now calibrated.
CARE, MAINTENANCE AND TROUBLESHOOTING
• Never touch the sensor pins, as skin oils may
adversely affect theTDS measurement.
• To clean the sensor pins, clean with rubbing alcohol
and let air dry.
• If you notice the readings are off from what they
should be, replace the batteries or re-calibrate.
If your meter displays an 'ERR' message this could be
for one of the following reasons:
• The TDS level is out of the range of the meter (over
9,990 ppm).
• The sensor connector has been pulled out of the
monitor.
• There is something
wrong with the unit.
Contact Pentair
customer service.
FOODSERVICE.PENTAIR.COM | 19
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