INSTALLATION CONTINUED . . .
11. Faucet Operation
(A) For controlled water flow, push the handle down.
(B) For constant water flow, lift the faucet handle to lock it in the open position.
12. System Start-up
NOTE: The reverse osmosis membrane is treated with a food grade sanitizing
agent that may cause an undesirable taste. Although it is not harmful, it
should be flushed from the system.
NOTE: The post-polishing filter may contain fine black carbon particles. These
fines are harmless, but may make the water appear gray in color. The
carbon fines are flushed from the system with the first tank full of water.
NOTE: The RO system does not produce a high volume of water on demand as an
ordinary filter does. Water is produced at a slow, drop-by-drop rate. The
system requires about 2 to 4 hours to fill the storage tank. As water is taken
from the tank, the system automatically starts the cycle of replacing the
water and then stops water production when the tank is full.
Visually check the entire system for leaks. If a leak is present, see
CAUTION:
Troubleshooting on page 11.
(A) Turn off valve at top of storage tank.
(B) Turn on the cold water supply.
(C) Lift the faucet handle to lock it in the open position and let it drip for 30 min.
(D) Completely open the cold water supply until it comes to a stop. Allow water
to drip from the faucet for 12 more hours. Then close the faucet and open the
valve on the storage tank. The tank valve is open when the handle lines up with
the tubing connection.
(E) Allow 3 hours for the tank to fill. Continue to periodically check the installation
for leaks. After the storage tank is filled, open the faucet to flush the post-filter
cartridge (on the right side of the filter housing). Allow 4 to 5 minutes for all of
the water to drain from the tank. Close faucet and allow tank to fill.
(F) Repeat step E four times.
NOTE: Initially, the water may appear cloudy. This is a result of air trapped in the
post-polishing filter. It is not harmful and will disappear in a matter of
minutes. It may take up to a week after installing a new post-polishing filter
for the trapped air to dissipate.
The system is ready for operation. You can now enjoy quality water from your
Reverse Osmosis System.
TESTING YOUR REVERSE OSMOSIS SYSTEM
Model RO-2550 Reverse Osmosis System
Total Dissolved Solids (TDS) Test
NOTE: Under NSF/ANSI Standard 58, it is highly recommended that you (the
consumer) have your water tested at least every 6 months to verify that
your system is performing satisfactorily.
SAMPLING INSTRUCTIONS:
Sampling instructions are included with the Total Dissolved Solids (TDS) Test
Kit. If the TDS Test Kit is missing from your unit, please call 800.861.8758 for a
replacement.
8 • PENTAIR RO-2550 Installation and Operating Instructions
11
A
Closed Tank Valve
12
11
Open
Tank Valve
A
Push Down
Push Up
B
B
Counter-
clockwise
Total Dissolved
Solids Test Kit