Hydrotech 9100 SXT User Manual

9100SXT Valve

Meter Initiated Water Softener
Operation Manual

#54745 2/09

Read all instructions carefully before operation.

How Your 9100SXT Downflow Water Conditioner Works

Hard water enters your home through the main supply line, enters the softener and passes down through a resin mineral
bed which softens the water. An ion exchange process takes place in which the resin beads capture and hold calcium and
magnesium, the hardness minerals, while the water takes on sodium ions. The soft water then flows into your household
water line.

In normal operation, the Time of Day display will alternate being viewed with the Volume Remaining display then the Tank
in Service. This display will be in gallons, liters or cubic meters. The tank in service will be shown as U-I or U-2. As treated
water is used, the Volume Remaining display will count down from a maximum value to zero or (---).Once this occurs, a
regeneration cycle will be initiated at the Set Regeneration Time. Water flow through the valve is indicated by the Flow
Indicator that will flash in direct relationship to flow rate.

Example 833 Gallons of Treated

Water Remaining

Tank In Service

0 Gallons of Treated
Water Remaining

Control Operation During Regeneration

In regeneration, the control will display a special regeneration display. In this display, the control will show the current
regeneration step number the valve is advancing to or has reached and the time remaining in that step. The step
number displayed will flash until the valve has completed driving into this regeneration step position. Once all
regeneration steps have been completed, the valve will return to Service and resume normal operation.

Example Less than 6 minutes

remaining in Regen
Step Rapid Rinse

Pushing the Extra Cycle Button during a regeneration cycle will immediately advance the valve to the next cycle step
position and resume normal step timing.

1

Performance

PM Indicator

Flow Indicator
(Flashing with water flow)

PM Indicator

Flow Indicator
(Flashing with water flow)

Item Model Capacity at regeneration salt levels Service Flow Maximum Resin Volume Mineral Tank Size Brine Tank Size Salt Shipping

Number Number (kilograins as CaCO

3

) Rate

(2)

Flow To Drain per tank Width x Height Width x Height Capacity Weight

@15lb/cf @10lb/cf

(1)

@6lb/cf USGPM (LPM) USGPM (LPM) cu.ft. (litres) inches (mm) inches (mm) Lbs. (kg) Lbs. (kg)

7627 9100SXT-30 TMI 30 27 20 10 (37.9) 1.5 (5.7) 1.00 (28) 9 x 48 (229 x 1219) 21 x 36 (533 x 914) 308 (140) 185 (84)

7628 9100SXT-45 TMI 45 41 30 11 (41.6) 2.0 (7.6) 1.50 (43) 10 x 54 (254 x 1372) 21 x 36 (533 x 914) 308 (140) 248 (113)

7629 9100SXT-60 TMI 60 55 40 15 (56.8) 3.0 (11.4) 2.00 (57) 12 x 52 (305 x 1321) 21 x 36 (533 x 914) 308 (140) 340 (154)

(1)

10lb/cu.ft. salt dosage is the standard factory setting.

Operating Temperature Range: 34° to 110°F (1° to 43°C)
Operating Pressure Range: 20 to 120 psi (137 to 827 kPa)
Electrical: 24V/60Hz with a supplied 120V/60Hz Wall Mount Approved Class 2 Transformer

• Capacities are based on two tanks of resin. Eg: 9100SXT-30 set at 10lb/cf salt setting would provide
27,000 grains of hardness removal for one tank.

• These products are not intended to be used to treat water that is microbiologically unsafe or of
unknown quality without adequate disinfection before or after the system.

• The manufacturer reserves the right to make product improvements which deviate from the
specifications and descriptions stated herein without obligation to change previously manufactured
products or to note the change.

• Peak flow rates are intended for intermittent use only and are for residential application only.

• 1 kilograin is equal to 1000 grains.

5

2

Control Operation During Programming

The control will only enter the Program Mode with the valve in Service. While in the Program Mode, the control will
continue to operate normally, monitoring water usage and keeping all displays up to date. Control programming is stored
in memory permanently, eliminating the need for battery back-up power.

Meter Immediate Control

A meter immediate control measures water usage and regenerates the system as soon as the calculated system
capacity is depleted. The control calculates the system capacity by dividing the unit capacity (typically expressed in
grains/unit volume) by the feed water hardness and subtracting the reserve. Meter Immediate systems generally do not
use a reserve volume. However, in twin tank systems with soft-water regeneration, the reserve capacity should be set to
the volume of water used during regeneration to prevent hard water break-through. A Meter Immediate control will also
start a regeneration cycle at the programmed regeneration time if a number of days equal to the regeneration day
override pass before water usage depletes the calculated system capacity.

Meter Delayed Control

A Meter Delayed Control measures water usage and regenerates the system at the programmed regeneration time after
the calculated system capacity is depleted. As with Meter Immediate systems, the control calculates the system capacity
by dividing the unit capacity by the feed water hardness and subtracting the reserve. The reserve should be set to insure
that the system delivers treated water between the time the system capacity is depleted and the actual regeneration
time. A Meter Delayed control will also start a regeneration cycle at the programmed regeneration time if a number of
days equal to the regeneration day override pass before water usage depletes the calculated system capacity.

Time Clock Delayed Control

A Time Clock Delayed Control regenerates the system on a timed interval. The control will initiate a regeneration cycle
at the programmed regeneration time when the number of days since the last regeneration equals the regeneration day
override value.

Day of the Week Control

This control regenerates the system on a weekly schedule. The schedule is defined in Master Programming by setting
each day to either “off” or “on.” The control will initiates a regeneration cycle on days that have been set to “on” at the
specified regeneration time.

Control Operation During a Power Failure

The SXT includes integral power backup. In the event of power failure, the control shifts into a power-saving mode. The
control stops monitoring water usage, and the display and motor shut down, but it continues to keep track of the time
and day for a minimum of 48 hours.

The system configuration settings are stored in a non-volatile memory and are stored indefinitely with or without line
power. The Time of Day flashes when there has been a power failure. Press any button to stop the Time of Day from
flashing.

If power fails while the unit is in regeneration, the control will save the current valve position before it shuts down. When
power is restored, the control will resume the regeneration cycle from the point where power failed. Note that if power
fails during a regeneration cycle, the valve will remain in it’s current position until power is restored. The valve system
should include all required safety components to prevent overflows resulting from a power failure during regeneration.

The control will not start a new regeneration cycle without line power. If the valve misses a scheduled regeneration due
to a power failure, it will queue a regeneration. Once power is restored, the control will initiate a regeneration cycle the
next time that the Time of Day equals the programmed regeneration time. Typically, this means that the valve will
regenerate one day after it was originally scheduled. If the treated water output is important and power interruptions are
expected, the system should be setup with a sufficient reserve capacity to compensate for regeneration delays.

3

Installation Instructions

All government codes and regulations governing the installation of these devices must be observed.

CAUTION:If the ground from the electrical panel or breaker box to the water meter or
underground copper pipe is tied to the copper water lines and these lines are cut during installation of the Noryl bypass
valve and/or poly pipe, an approved grounding strap must be used between the two lines that have been cut in order to
maintain continuity. The length of the grounding strap will depend upon the number of units being installed and/or the
amount of copper pipe being replaced with poly. See Figure 1.

In all cases where metal pipe was originally used and is
later interrupted by poly pipe or the Noryl bypass valve as
in Figure 1 or by physical separation as in Figure 2,

An approved ground clamp with no less than #6 copper
conductor must be used for continuity, to maintain proper
metallic pipe bonding. Check your local electrical code for
the correct clamp and cable size.

Check your local electrical code for the correct clamp and
cable size.

1. Determine the best location for your water softener,
bearing in mind the location of your water supply lines,
drain line and 120 volt AC electrical outlet. Subjecting the
softener to freezing or temperatures above 110°F
(43°C)will void the warranty.

Media Installation (When Necessary)

• Remove the valve from the mineral tank.

• Temporarily plug the open end of the riser tube to ensure
that no resin or gravel falls down into the distribution.

• Fill mineral tank one quarter full of water to protect
distribution during gravel installation.

• Slowly and carefully add the gravel support bed and the
softener or filtration media leveling each layer as it is
placed into the tank.

• Unplug the riser tube, carefully position the valve over it and turn the valve into the threads in the fiberglass tank,
tightening securely into tank. Note: Ensure that the internal O-ring in the valve fits securely over the riser tube.
Silicone grease (#13691) or other food grade lubricant may be applied to the O-ring to ease installation of the riser
tube. DO NOT use petroleum based lubricants as they will cause swelling of O-ring seals.

• The softener or filter is now charged with softening resin.

• It is recommended that the softener or filter tank now be completely filled with water (SLOWLY) to soak the resin or
filtration media before startup. This will allow the media to absorb water as well as help displace any trapped air.
This will reduce the chance of backwashing resin or filter media out of the tank during the initial backwash on
startup.

2. Outside faucets used to water lawns and gardens should not supply softened water. A new water line is often
required to be connected to supply hard water to the inlet of the water softener and to the outside faucets. Cut the
water line between where it enters the house and before any lines that branch off to feed the hot water heater or
other fixtures in the house and as near the desired location of the water softener as possible. Install a tee fitting on
the feed end of the cut pipe, and an elbow fitting on the other end. Install piping from the tee to the inlet of the water
softener and from the elbow to the outlet of the softener. To sever the water lines which branch off to feed any
outside faucets, cut the branch lines approximately two inches from the fitting on the main water line. Install an
elbow on the end of the pipe nearest the outside faucet and a cap on the end connected to the existing water line.
Install piping from the tee installed on the inlet line to the water softener to the elbow installed on the pipe to the
outside faucet. Following this procedure will result in all lines in the house, with the exception of the outside faucets,
but including the water heater and therefore the hot water lines, being supplied with soft water.

3. Familiarize yourself with the location of the inlet, outlet and drain on the control valve. Be very careful not to get the
controls wet.

Figure 2

Figure 1

Electrical Panel

Ground Strap

Poly Pipe

Ground
From
Panel

Poly Pipe

Softener
c/w Plastic Bypass

Copper Pipe

Water Meter

Outside Water Line For Outside & 3rd Tap Comes From Meter

Filtered Water Line in Home

Unfiltered Water Bypass
Loop Cut & Capped

Ground Strap Required
Because of Break in Continuity