255 datasheet(9/20 Pages) PENTAIR

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Guest Cycle (Manual regeneration)

When abnormally high water usage exhausts your

water conditioner’s capacity ahead of schedule, an extra

regeneration can be achieved. Depress the indicator knob on

the 440i (Figure 11) with a wide-blade screwdriver and turn

COUNTERCLOCkWISE to START to initiate a regeneration.

For the 460i, simply depress the indicator knob (Figure 12).

It will take a few minutes for regeneration to start. A normal

regeneration will take approximately two hours.

SErVICE AND MAINtENANCE

Inspect and clean brine tank and screen filter on end of brine

pickup tube once a year or when sediment appears in the

bottom of the brine tank.

Clean injector screen and injector once a year:

1. Unplug the wall-mount transformer.

2. Shut off water supply or put bypass valve(s) into

bypass position.

3. Relieve system pressure by opening valve No. 5 (at rear)

with a screwdriver.

4. Using a screwdriver, remove injector screen and injector

cap (Figure 16).

5. Clean screen using a fine brush. Flush until clean.

6. Using a needle-nose pliers, pull injector straight out.

7. Flush water into the injector screen recess of the valve

body to flush debris out through the injector recess.

8. Clean and flush the injector.

9. Lubricate the o-rings on the injector, injector cap and

injector screen with silicone lubricant.

10. Reinstall the injector, injector cap and injector screen. See

IMPORTANT note.

11. Plug the wall-mount transformer into outlet; reset time

of day.

12. Slowly open water supply valve or return bypass valve(s) to

the “not in bypass” position.

IMPortANt: Do not overtighten the plastic cap. Seat the cap

lightly into position. Overtightening may cause breakage of the

plastic cap that may not be immediately evident.

Screen

Injector

Injector Cap

Figure 20

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. 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.

Some conditioners may need to be disinfected after

installation and some conditioners will require periodic

disinfection during their normal life.

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.

Sodium or Calcium Hypochlorite Application

These materials are satisfactory for use with polystyrene

resins, synthetic gel zeolite, greensand and bentonites.

5.25% Sodium Hypochlorite

These solutions are commonly known as household bleach.

If stronger solutions are used, such as those sold for

commercial laundries, adjust the dosage accordingly.

1. Dosage

g. Polystyrene resin; 1.2 fluid ounce (35.5 ml) per

cubic foot.

h. Non-resinous exchangers; 0.8 fluid ounce (23.7 ml) per

cubic foot.

2. brine tank conditioners

a. backwash the conditioner and add the required

amount of hypochlorite solution to the well of the

regenerant tank. The regenerant tank should have

water in it to permit the solution to be carried into the

conditioner.

b. Proceed with the normal regeneration.

Calcium Hypochlorite

Calcium hypochlorite, 70% available chlorine, is available in

several forms including tablets and granules. These solid

materials may be used directly without dissolving before use.

1. Dosage

a. Two grains (approximately 0.1 ounce [3 ml]) per

cubic foot.

2. Regenerant tank conditioners

a. backwash the conditioner and add the required

amount of hypochlorite to the well of the regenerant

tank. The regenerant tank should have water in it to

permit the chlorine solution to be carried into the

conditioner.

b. Proceed with the normal regeneration.

ProGrAMMING continued

Autotrol® 255 Valve/400 Series Service Manual • 9

255 Datasheet(PDF) 9 Page - Pentair plc. All rights reserved.

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