OP175 System Installation, Operation & Maintenance
15
Routine Maintenance: AMS-QT15Change Procedure
The AMS-QT15 membrane is a high-efficiency, low-
fouling reverse osmosis membrane that will provide
product water with 95+% rejection of the Feed Water.
The life of the membrane will vary depending on Feed
Water quality, usage, and Pre-Filter maintenance.
Typical membrane life is 12 to 18 months, but with rou-
tine scheduled Pre-Filter replacement, and no adverse
Feed Water conditions, the AMS-QT15 membrane
may last 2-5 years.
AMS-QT15 Replacement
1. Either close the Water Supply Valve (shutting off
all water flow), or put the Emergency Bypass Valve
(on the Processor) in the System Bypass position
(allowing untreated water to continue to flow to the
equipment).
2. Place a bucket or other similar catch basin under
the AMS-QT15. Remove the black reject line from
the push-to-connect elbow on the bottom of the
membrane. (Refer to “Push-to-Connect Fittings”
on page 16.) Allow the membrane and reject line
to drain into the bucket.
3. Remove the AMS-QT15 cartridge from the head
by turning the cartridge a quarter-turn to the left
and pulling down on the cartridge.
4. With a wrench, remove the push-to-connect elbow
and stem adapter attached to the bottom of the
AMS-QT15 cartridge. Remove the residual Teflon
tape from the male 1/8” threads on the stem
adapter.
5. Wrap the 1/8” male thread on the stem adapter
with 2 wraps of Teflon tape and re-install in the
bottom of the new AMS-QT15 cartridge.
6. Align the taps on the AMS-QT15 cartridge with
the QT head and insert into the head and turn a
quarter-turn to the right.
7. Insert the black reject line into the push-to-connect
elbow on the bottom of the AMS-QT15 cartridge.
8. Install a piece of 3/8” tubing in the Processor
Sample Port valve, open the Sample Port, and
direct to a bucket or drain. Turn the Tank Inlet
Divert Valve to the Bypass or UP position. Open
the Water Supply Valve and put the Emergency
Bypass Valve in the “SERVICE” position. Allow
water to flush through the membrane displacing air
and preservative to flow out the Sample/Flush port
to drain for 5-10 minutes.
9. Actuate the Water Quality Monitor and check the
“OUT” or Permeate Water TDS.
10. After the AMS-QT15 cartridge is purged of air,
close the Sample Port.
11. Check for leaks.
Trouble-Shooting
Problem
Possible Cause
Resolution
Running out of water.
Operating Pressure reduced
Very cold Feed Water temperature
Low Feed Water Pressure
Demand exceeds system capacity
Pre-Filters need to be replaced
Raise water temp to increase production or determine if higher capacity
system is required
Install optional Feed Water Pressure Booster Pump
Determine if the demand is unusual or consistent or resize system
Poor water quality.
Membrane failure
Replace AMS-QT15 membrane
Short AMS-QT15 mem-
brane life.
Poor Feed Water quality, presence of
iron, silica or non-calcium carbonate
hardness
Determine Feed Water quality by obtaining a water quality report from city
water supply utility or contact your OptiPure dealer
Short Pre-Filter life
Heavy sediment loading
Add FXAF01-12 or -12B for added Pre-Filter protection
Processor Does Not Shut
Off or Turn On
Automatic Shutoff Valve not function-
ing
Replace Automatic Shutoff Valve
Water Quality Monitor will
not turn on
Dead batteries
Replace batteries by sliding Water Quality Monitor up and removing the six
screws on the back cover. Remove cover to access battteries.
RP Pump runs intermit-
tently or rough.
Air trapped in pump head.
Downstream water leak.
Unplug pump and open downstream valve to empty Buffer Tank.
Repair or eliminate downstream water leak.
RP Pump cycles on-off
frequently
Low air pre-charge in Buffer Tank
Empty Buffer Tank and re-charge air pressure to 20 psi.
