4
Table of Contents
Page
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
How To Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Project Data Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 –8
Set Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Operating Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
System Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–12
Start Up Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Installation Diagrams -
Series HCTA-200-PPSM Duplex Alternating Systems . . . . . . .13
Installation Diagrams -
Series HCP-200-PPSM 2-4 Tank Progressive Systems . . . . . .14
Controller Electrical Connections . . . . . . . . . . . . . . . . . . . . . . .15
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
NXT2 Controller Programming and Operation . . . . . . . . . . . . .17
Controller Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Controller Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Controller Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20–21
Master Programming Mode Flow Chart . . . . . . . . . . . . . . . 22–23
User Programming Mode Flow Chart. . . . . . . . . . . . . . . . . . . .23
Diagnostic Programming Mode Flow Chart . . . . . . . . . . . . . . .24
Time of Day Programming Mode Flow Chart . . . . . . . . . . . . . .25
NXT2 Programming Parameters and Ranges. . . . . . . . . . . . . .26
Replacing the Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Replacement Parts - Major System Components . . . . . . .28–29
Replacement Parts - Skid & Plumbing Components . . . . . . . .30
Replacement Parts - 2900 Upper Powerhead . . . . . . . . . . . . .31
Replacement Parts - NXT2 Controller Assembly . . . . . . . . . . .32
NXT to NXT2 Conversion Kit . . . . . . . . . . . . . . . . . . . . . . . . . .33
Replacement Parts - 2900 Lower Powerhead . . . . . . . . . . . . .34
Replacement Parts - 2900S Control Valve Body . . . . . . . . . . .35
Replacement Parts - 1700 Brine System . . . . . . . . . . . . . . . . .36
Replacement Parts - 1710 Brine System . . . . . . . . . . . . . . . . .37
Replacement Parts - 2" Stainless Steel Electronic Meter . . . . .38
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39–40
Water Softener Flow Diagrams . . . . . . . . . . . . . . . . . . . . .41– 42
Flow Data and Injector Draw Rates - Down Flow . . . . . . . . . . .43
Injector Nozzle and Throat Chart
for 1700 Brine Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Introduction
Principals of Softening- Ion Exchange
In nature, water acts as a solvent that dissolves substances it
comes in contact with such as solid rock. When water dissolves
limestone rock, which is composed of calcium and magnesium,
the solid calcium and magnesium become ions. This means
they have been dissolved into the water and are now a liquid. An
ion with a positive electrical charge is called a cation. Calcium
and magnesium hardness ions in water are positively charged
cations. When water dissolves enough calcium and magnesium
hardness cations it is classified as hard water, which can cause
lime scale build up in plumbing systems, water spots, and an
increase in soap and cleaning product usage.
Ion exchange water softening is a process where an ion
exchange resin is used to effectively exchange calcium and
magnesium hardness cations for sodium cations in the water.
New, or freshly regenerated, ion exchange resin is saturated with
sodium cations. As calcium and magnesium hardness cations
come in contact with the ion exchange resin, they attach to the
resin and sodium cations are released into the water. This is pos-
sible because the hardness cation are more attracted to the ion
exchange resin than the sodium cations. Therefore, scale form-
ing calcium and magnesium cations have been exchanged for
non-scale forming sodium cations as the water is treated. If the
calcium and magnesium content of the water is reduced to less
than 17.1 mg/L, that water is classified as soft water.
Eventually the ion exchange resin will become exhausted, depleted
of sodium, and will need to be regenerated with a sodium brine
solution to restore its capacity to soften water. This system
includes a flow meter to track treated water volume and initiate
the regeneration process before resin exhaustion occurs.
Regeneration occurs automatically and consists of 5 steps:
Step 1- Backwash
Approximate Duration 10 Minutes- Fresh water flow is directed
upward through the resin bed, to remove solid particles the resin
bed has captured, sending them to drain.
Step 2- Brine Draw
Approximate Duration 15-20 Minutes- Brine water is drawn from
the brine tank, rinsed over the ion exchange resin, driving away
the calcium and magnesium cations and restoring sodium cations
within the resin. Calcium and magnesium is sent to drain.
Step 3- Slow Rinse
Approximate Duration 40-45 Minutes- Once the brine tank is
emptied of brine water, fresh water will continue to rinse over
the resin and rinse calcium and magnesium cations to drain.
Step 4- Rapid Rinse
Approximate Duration 10 Minutes- After the conclusion of slow
rinse, fresh water will rinse over the resin to ensure any residual
sodium brine has been cleaned from the resin before it returns
to service.
At the conclusion of Rapid Rinse, the tank will remain in the
Stand By position.
Step 5- Brine Tank Refill
Approximate Duration User Adjustable- In this final step of
regeneration, water is added back into the brine tank so that
a brine solution can be prepared for the next regeneration.
