255 datasheet(8/20 Pages) PENTAIR

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460tC Control

460TC

DAYS

CLOCK

Transformer

Plug Receptacle

hour Time Display

Access Door

Time Set button

Raised Tab

Indicator knob

Timer

Locking Pin

PM Indicator

Spare Jumper

Jumper

Figure 15

Programming

Plug the wall-mount transformer into a functioning electrical

outlet that is not controlled by a switch. Plug the transformer

into the transformer plug receptacle on the control.

Open the access door by pushing the raised tab on the door

toward the left while pulling the tab out (Figure 16).

time of Day Setting

With the jumper on the set of pins next to the word TIME

(Figure 17), set the time of day to the closest hour by pressing

the black TIME SET button. PM hours are indicated by a light

next to the letters PM on the display window.

NotE:

the use of a small needle-nose pliers will aid in

moving the jumper.

NotE:

the unit is factory set to regenerate at 2:00 a.m. If

you prefer to have the unit regenerate at an earlier

or later time, simply set the current time of day

accordingly (e.g., to have the unit regenerate at 4:00

a.m.—two hours later—set the clock two hours

earlier than the actual time of day).

NotE:

the timer locking Pin should always be horizontal

(Figure 16) during operation.

Days Setting

Move the jumper to the set of pins next to the word DAYS

(Figure 18). Press the black TIME SET button until the desired

number of days between regeneration is displayed. The range

is from 1 to 30 days.

TIME

DAYS

CLOCK

TIME

DAYS

CLOCK

TIME

DAYS

CLOCK

Figure 16

Figure 17

Figure 18

Clock Setting

Move the jumper to the set of pins next to the word CLOCk

(Figure 19). Press the black TIME SET button until the desired

clock setting is displayed. The clock range is 0 to 1. Select 0

for the standard AM/PM clock or select 1 for a 24 hour clock.

Return the jumper to the top set of pins next to the word TIME

and replace the access door. The jumper must NOT be left

on any pins other than the top pair next to the word TIME.

Otherwise, the unit may show a blank display.

NotE:

A spare jumper is located on the bottom set of pins.

Common Features

When using the 255 valve with the 440i or 460i controls, there

are several features and procedures that are unique to the 400

series controls. They are as follows:

Salt Dial Adjustment

table 1 – Suggested Salt Dial Settings (Pounds of Salt) For Various

Size Softeners

Capacity

Setting

(Kilograins)

0.5

Ft3

0.75

Ft3

1.0

Ft3

1.25

Ft3

1.5

Ft3

1.75

Ft3

2.0

Ft3

4.5

—

9.0

5.5

—

8.5

6.0

—

14.0

8.5

7.0

—

15.0

11.0

9.0

—

18.5

12.5

10.0

9.0

—

16.0

12.0

10.0

9.0

—

11.5*

17.0

14.0

12.0

—

14.0* 10.5*

17.0

—

15.0*

*This setting requires the use of “XS” (extra salt) cam and

doubles the amount of the setting.

These models may be adjusted to produce maximum to

minimum conditioning capacities by setting the salt dial, which

controls the amount of salt used per regeneration. When

desired, the minimum setting may be used on installations if

the frequency of regeneration is increased to compensate for

lower regenerated conditioning capacity. The installing dealer

will set the unit for proper salt usage. Further adjustments

are needed only if the hardness of the water supply changes

or if water use changes dramatically. Capacity will need to be

adjusted accordingly.

To adjust salt dosage, insert a small screwdriver into the white

indicator knob and move pointer to proper salt setting (Figure 13).

NotE:

to convert the salt settings from English to metric,

divide by 2.2 (e.g., 12 pounds ÷ 2.2 = 5.5 kg of salt).

Figure 19

The amount of salt placed in the brine tank has nothing to do

with the amount of salt used during the regeneration cycle.

Water will dissolve and absorb salt only until it becomes

saturated. A given amount of brine (salt-saturated water)

contains a specific amount of salt. The salt dial controls the

amount of brine used during the regeneration cycle (e.g., when

set at 15 pounds (6.8 kg) the amount of brine the conditioner

will use for each regeneration will contain 15 pounds (6.8 kg)

of salt, etc.)

Never let the amount of salt in the brine tank be lower than the

normal liquid level. Do not overload the brine tank with salt.

ProGrAMMING continued

8 •Autotrol® 255 Valve/400 Series Service Manual

255 Datasheet(PDF) 8 Page - Pentair plc. All rights reserved.

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