This water conditioner’s control valve conforms to NSF/ANSI 44 and 61 for materials and
structural integrity only. Generic systems were tested and certified by WQA as verified
by the performance data sheet.
•Please review this entire Installation and Operation manual before installing unit.
•We recommend that this water conditioning unit be installed by a trained
professional water treatment dealer. Follow all local codes for plumbing this unit.
•Follow local electrical codes. Install a correctly sized electrical bonding jumper
between the inlet and outlet pipes when these devices are installed in metallic
plumbing systems.
•Inspect this unit carefully for carrier shortage or shipping damage before beginning
installation of unit.
•This system is not intended to be used for treating water that is microbiologically
unsafe or of unknown quality without adequate disinfection before or after the
system.
•This system is to be used only for potable water.
•Use only lead-free solder and flux, as required by federal and state codes, when
installing soldered copper plumbing.
•Use caution when sweat joining metal pipes near this water conditioning system.
Heat can adversely affect the plastic used in this system and bypass valve.
•Use only silicone grease for lubrication of this unit.
•Use only the power transformers supplied with this conditioning systems control
valve unit.
•Do not allow this water conditioning unit to freeze. Damage from freezing will void
this water conditioning unit’s warranty.
•Do not store flammable or volatile chemicals near this water conditioning unit.
•For the purpose of plumbing system sizing, only the rated service (i.e. "Normal") flow
and corresponding pressure loss may be used. The rated service flow rates are the
flow rates at which the performance capabilities of these devices were evaluated.
Contact your local Professional Water Dealer for system service, and to obtain
Autotrol brand replacement parts for this control valve unit.
2
Valve Illustration
Autotrol 255 Valve Control Module
400 Series Control
Standard L-Lid Cover
Variable
Brine Control
Injector Access Plug
Tank Adapter Module
Brine Line Fitting Connection
1/4-inch NPT
Air Check
Air Check
Figure 1
Probe Connection Slot
Optional
Optional i-lid Cover
i-lid Cover
Optional Bypass
S
S
A
P
Y
B
S
S
A
P
Y
B
Inlet Connection 3/4-inch
or 1-inch NPT or BSPT
Drain Connection 3/8-inch
or 1/2-inch NPT or BSPT
Tank Thread 2-1/2-inch - 8 male
Outlet connection 3/4-inch
or 1-inch NPT or BSPT
Figure 2
3
System Regeneration Cycles (7-Cycle Operation)
1.Service (Downflow) — Cycle C0:
Untreated water is directed down through the resin bed and up through the riser
tube. The hardness ions attach themselves to the resin and are removed from the
water. The water is conditioned as it passes through the resin bed.
2.Backwash (Upflow) — Cycles C1, C6:
The flow of water is reversed by the control valve and directed down the riser
tube and up through the resin bed. During the backwash cycle, the bed is
expanded and debris is flushed to the drain.
3.Brine/Slow Rinse (Downflow) — Cycles C3:
The control directs water through the brine injector and brine is drawn from the
regenerant tank. The brine is then directed down through the resin bed and up
through the riser tube to the drain. The hardness ions are displaced by sodium
ions and are sent to the drain. The resin is regenerated during the brine cycle.
Brine draw is completed when the air check closes.
4.Fast Rinse (Downflow) — Cycles C5, C7:
The control directs water down through the resin bed and up through the riser
tube to the drain. Any remaining brine residual is rinsed from the resin bed.
5.Brine Refill (Downflow) — Cycle C8:
Brine refill occurs during a portion of the fast rinse cycle. Water is directed to the
regenerant tank at a controlled rate, to create brine for the next regeneration.
6.Repressurize Cycle — (No Flapper Open), Cycle C4:
This cycle closes all flappers for a short time to allow the air and water to
hydraulically balance in the valve before continuing the regeneration.
4
SERVICEBACKWASH BRINE/SLOW RINSE
C0 C1 and C6 C2 and C3
From Regenerant
Tank
To Regenerant
Tank
REPRESSURIZE
C4 C5 and C7 C8
FAST RINSE
BRINE REFILL
Figure 3
Installation
All plumbing must conform to local codes.
Inspect unit carefully for carrier shortage or shipping damage.
Location Selection
1. The distance between the unit and a drain should be as short as possible.
2. If it is likely that supplementary water treating equipment will be required, make
certain adequate additional space is available.
3. Since salt must be added periodically to the brine tank, the location should be
easily accessible.
4. Do not install any unit closer to a water heater than a total run of 10 feet (3 m) of
piping between the outlet of the conditioner and the inlet to the heater. Water
heaters can sometimes overheat to the extent they will transmit heat back down
the cold pipe into the unit control valve.
Hot water can severely damage the conditioner. A 10-foot (3-m) total pipe run,
including bends, elbows, etc., is a reasonable distance to help prevent this
possibility. A positive way to prevent hot water from flowing from heat source to
the conditioner, in the event of a negative pressure situation, is to install a check
valve in the soft water piping from the conditioner. If a check valve is installed,
make certain the water heating unit is equipped with a properly rated
temperature and pressure safety relief valve. Also, be certain that local codes
are not violated.
5. Do not locate unit where it or it’s connections (including the drain and overflow
lines) will ever be subjected to room temperatures under 34
o
(49
C).
o
F (1oC) or over 120oF
5
6. Do not install unit near acid or acid fumes.
7. The use of resin cleaners in an unvented enclosure is not recommended.
Water Line Connection
The installation of a bypass valve system is recommended to provide for occasions
when the water conditioner must be bypassed for hard water or for servicing.
The most common bypass systems are the Autotrol
(Figure 4) and plumbed-in globe valves (Figure 5). Though both are similar in function,
the 256 Autotrol bypass offers simplicity and ease of operation.
Not in BypassIn Bypass
B
Y
P
A
S
S
B
Y
P
A
S
S
Figure 4 Autotrol Series 256 Bypass Valve
®
Series 256 bypass valve
A
P
A
P
S
Y
S
B
S
Y
S
B
Not in Bypass
Wate r
Conditioner
In Bypass
Wate r
Conditioner
Figure 5 Typical Globe Valve Bypass System
Drain Line Connection
1. Ideally located, the unit will be above and not more than 20 feet (6.1 m) from the
drain. For such installations, use an appropriate adapter fitting (not supplied), to
connect 1/2-inch (1.3-cm) plastic tubing to the drain line connection of the control
valve.
6
2. If the unit is located more than 20 feet (6.1 m) from drain, use 3/4-inch (1.9-cm)
tubing for runs up to 40 feet (12.2 m). Also, purchase appropriate f itting to connect
the 3/4-inch tubing to the 1/2-inch NPT drain connection.
3. If the unit is located where the drain line must be elevated, you may elevate the
line up to 6 feet (1.8 m) providing the run does not exceed 15 feet (4.6 m) and water
pressure at conditioner is not less than 40 psi (2.76 bar). You may elevate an
additional 2 feet (61 cm) for each additional 10 psi (0.69 bar).
4. Where the drain line is elevated but empties into a drain below the level of the
control valve, form a 7-inch (18-cm) loop at the far end of the line so that the
bottom of the loop is level with the drain line connection. This will provide an
adequate siphon trap.
5. Where the drain empties into an overhead sewer line, a sink-type trap must be
used.
IMPORTANT: Never insert drain line into a drain, sewer line or trap. Always allow
an air gap between the drain line and the wastewater to prevent the possibility of
sewage being back-siphoned into conditioner.
Correct Way
Drain Line Tube
Right Way
Drain
Figure 6
Note: Standard commercial practices have been expressed here. Local codes may
require changes to these suggestions.
Brine Line Connection
It will be necessary to install the brine tube and line to a fitting installed on the air
check. Teflon
Be sure all fittings and connections are tight so that premature checking does not take
place. Premature checking is when the ball in the air check falls to the bottom before
all brine is drawn out of the brine tank. See Placing Conditioner into Operation
section.
*Teflon is a regis tered trademark of E.I. DuPont de Nemours and Company, Inc .
*
tape all threaded connections.
Overflow Line Connection
In the absence of a safety overflow and in the event of a malfunction, the BRINE TANK
OVERFLOW will direct “overflow” to the drain instead of spilling on the floor where it
could cause considerable damage. This fitting should be on the side of the cabinet or
brine tank.
7
To connect overflow, locate hole on side of brine tank. Insert overflow fitting (not
supplied) into tank and tighten with plastic thumb nut and gasket as shown (Figure 7).
Attach length of 1/2-inch (1.3-cm) I.D. tubing (not supplied) to fitting and run to drain.
Do not elevate overflow line higher than 3 inches (7.6 cm) below bottom of overflow
fitting. Do not tie into drain line of control unit. Overflow line must be a direct,
separate line from overflow fitting to drain, sewer or tub. Allow an air gap as per drain
line instructions (Figure 6).
Overflow Fitting
Brine Tank
Installed
Connect 1/2-inch (1.3-cm)
Tubing or Hose and Run
to Drain
Figure 7
Low Voltage Transformer
Use only the included transformer for powering the 400 series timers. Connect the
plug of the transformer secondary cable to the mating socket on the control (see
Figure 8).
Be certain that the transformer is plugged into a correct voltage source that is not
controlled by a wall switch.
8
Increasing the Length of the Transformer Cord
If it is necessary to extend the length of the transformer cord, an optional 15-foot (4.6m) extension is available (see Figure 9).
Figure 8
Figure 9
Disinfection of Water Conditioners
The materials of construction of the modern water conditioner will not support
bacterial growth, nor will these materials contaminate a water supply. In addition,
during normal use, a conditioner may become fouled with organic matter, or in some
cases with bacteria from the water supply. This may result in an off-taste or odor in
the water.
Thus, your conditioner may need to be disinfected after installation. Some
conditioners will require periodic disinfection during their normal life. Consult your
installing dealer for more information on disinfecting your conditioner.
Depending upon the conditions of use, the style of conditioner, the type of ion
exchanger, and the disinfectant available, a choice can be made among the following
methods.
9
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