Autotrol 255 Series - User Manual

Questions and Answers

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George HawkinsAug 17, 2025
Why Autotrol Control Systems will not draw brine?
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  Derrick HillAug 17, 2025
  If your Autotrol Control Systems won't draw brine, it could be due to several reasons. Check if the water pressure is low, and if so, set the pump to maintain 20 psi at the softener. A restricted drain line could also be the cause, so change the drain to remove any restrictions. Additionally, the injector might be plugged, requiring you to clean the injector and screen, or the injector might be defective, necessitating a replacement. Ensure that valve discs 2 and/or 3 are closed and free of foreign matter. Also, verify that the timer locking pin is horizontal. If the air check valve closes prematurely, momentarily put the control into brine/slow rinse; replace or repair the air check if needed.
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Karl Mcgee Jr.Aug 20, 2025
Why is Autotrol Control Systems using more or less salt than the salt dial setting?
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  Andrea HunterAug 20, 2025
  If your Autotrol Control Systems are using more or less salt than the salt dial setting indicates, the issue could stem from foreign matter within the controller, leading to incorrect flow rates. Remove the brine control and flush out any foreign matter. Manually position the control to brine/slow rinse to clean the controller, and then position the control to “purge” to remove brine from the tank. Alternatively, the brine control itself may be defective, requiring replacement.
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Shannon TorresAug 25, 2025
What causes intermittent or irregular brine draw in Autotrol Control Systems?
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  patty07Aug 25, 2025
  If you're experiencing intermittent or irregular brine draw with your Autotrol Control Systems, it could be due to low water pressure. Try setting the pump to maintain 20 psi at the softener. Alternatively, the injector may be defective, and you might need to replace it.
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kathleen17Aug 27, 2025
How to fix Autotrol Control Systems that will not regenerate automatically?
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  Tamara HillAug 28, 2025
  If your Autotrol Control Systems control will not regenerate automatically, there are several potential causes. First, check that the transformer or motor is properly connected to power. If the motor is connected, it may be defective and need replacement. Also, make sure that the skipper pins are depressed on the timer skipper wheel for the days regeneration is required. Finally, binding in the gear train of the timer can prevent regeneration, requiring timer replacement.
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rodriguezricardoAug 30, 2025
Why does Autotrol Control Systems regenerate at the wrong time?
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  Hannah LeeAug 31, 2025
  If your Autotrol Control Systems control regenerates at the wrong time of day, it is likely that the time is set incorrectly. Correct the time setting according to the provided instructions.
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christine51Sep 3, 2025
What to do if there is no conditioned water after Autotrol Control Systems regeneration?
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  John MoonSep 3, 2025
  If you have no conditioned water after regeneration with your Autotrol Control Systems, ensure there is salt in the brine tank. Add salt if necessary. Also, the injector might be plugged, so clean the injector and screen. Additionally, if the air check valve closes prematurely, put the control momentarily into brine/slow rinse; replace or repair the air check if needed.
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tblanchardSep 6, 2025
Why does Autotrol Control Systems backwash at an excessively low or high rate?
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  April GarrettSep 6, 2025
  If the Autotrol Control Systems backwashes or purges at an excessively low or high rate, it could be due to using an incorrect drain controller. Replace it with the correct size. Alternatively, foreign matter may be affecting the controller operation; in this case, remove the drain controller and clean the ball and seat.
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hthompsonSep 9, 2025
Why is there flowing or dripping water at drain line after Autotrol Control Systems regeneration?
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  Tanya DominguezSep 9, 2025
  If you notice flowing or dripping water at the drain or brine line after regeneration in your Autotrol Control Systems, it could be because the drain valve or brine valve is being held open by foreign matter or a particle. Try manually operating the valve stem to flush away the obstruction. Alternatively, the valve stem return spring may be weak, requiring replacement.
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Elizabeth McdonaldNov 13, 2025
What to do if my Autotrol Control Systems brine tank overflows?
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  James RobinsonNov 13, 2025
  If your Autotrol Control Systems brine tank is overflowing, it could be due to several reasons. It might be that the brine valve disc 1 is being held open by foreign matter; try manually operating the valve stem to flush away the obstruction. Another cause could be an uncontrolled brine refill flow rate, in which case you should remove the brine control to clean the ball and seat. Also, valve disc 2 might not be closing during brine draw, causing brine refill; flush out any foreign matter by manually operating the valve stem. An air leak in the brine line to the air check could also be the culprit; check all connections in the brine line for leaks. Finally, an improper drain control for the injector or a drain control clogged with resin or other debris can cause this issue; ensure the drai...

Summary

Introduction

Superior Design

Highlights key design advantages: fewer parts, single motor, program clock, manual indexing, no moving parts in water, no dynamic seals, versatile manifold compatibility.

Superior Operation

Details operational benefits: direct acting system, five-cycle operation, pressure-held discs, automatic phase return, bypass water availability.

Installation

Water Line Connection

Drain Line Connection

Brine Line Connection

Low Voltage Transformer

Placing Conditioner into Operation

Step-by-step guide for initial startup: setting the timer, purging air from the resin tank, and filling the brine tank with initial water.

Adjustment of Timer

Special Features of Timer

Adjustment of Brine Control

How to Set Salt Dial

Instructions for adjusting the salt dial to regulate salt usage per regeneration cycle, including English to Metric conversion.

Removing the Series 255 Control Module for Servicing

Preventive Maintenance

Clean injector screen and injector once a year

Step-by-step guide for yearly cleaning of the injector screen and injector, including safety cautions for handling parts.

Replacement Parts

Troubleshooting

Disinfection of Water Conditioners

Sodium or Calcium Hypochlorite Application

Calcium Hypochlorite

Autotrol 255 Series Specifications

General

Operating Pressure	20-125 psi
Series	255
Manufacturer	Autotrol
Application	Water softening and filtration
Max Pressure	125 psi
Valve Material	Noryl
Type	Automatic Valve
Port Size	1"
Connection Type	NPT
Service Flow Rate	Up to 27 GPM