Autotrol 255 Logix

Summary

Product Identification

Autotrol 255 Control Valve - Logix Series.

Timer Characteristics

740 Time Clock

• Electronic time clock (chronometric)
• 1- or 99-day regeneration setting (days interval) or days of the week
• High efficiency regeneration sequence
• 12 V operation
• Filter or conditioner setting in one control
• Operates 255, 263, 268 with one controller

742 Time Clock

• Same features as the 740 Time Clock, plus:
  • Fully programmable cycle times
  • Salt setting in 10-grams increments
  • Optional no-salt detector
  • Operates 255, 263, 268, 278 and Magnum IT with one controller

760 Demand

• Electronic demand (volumetric)
• Calendar override
• 12 V operation
• 28-day variable reserve
• High efficiency regeneration sequence
• Automatic capacity calculations
• Operates 255, 263, 268 with one controller

762 Demand

• Same features as the 760, plus:
  • Fully programmable cycle times
  • Salt setting in 10-grams increments
  • Optional no-salt detector
  • Operates 255, 263, 268, 278, and Magnum IT with one controller

764 Demand

• Same features as the 762, plus:
  • Multi-tank applications (twin alternating, multi-tank parallel)
  • Control lockout
  • Remote regeneration

Valve Specifications

Valve Body

• Glass-filled thermoplastic – NSF Listed material

Rubber Components

• Compounded for cold water – NSF Listed material

Valve Materials Certification

• WQA Gold Seal Certified to ORD 0902, NSF/ANSI 44, CE, ACS

Weight (Valve with Control)

• 1.8 kg (4 lbs)

Recommended Operating Pressure

• 1.38-8.27 bar (20-120 psi)

Hydrostatic Test Pressure

• 20.69 bar (300 psi)

Water Temperature

• 2-38°C (35-100°F)

Ambient Temperature*

• 2-48.9°C (35-120°F)
  • *Recommend use of outdoor cover for direct sunlight application

Valve Connections

• Tank Thread: 2½ inches – 8, male
• Brine Line: ¼ inch or ⅜ inch NPT, male; air check built into valve
• Inlet/Outlet Manifold (brass or thermoplastic): 1 inch NPT or BSPT, female
• Drain Line: ½ inch (manifold dependent)
• Distributor Tube (diameter): 27 mm (1.050 inch) or 20.6 mm (13⁄16 inch)
• Distributor Tube (length): 29 mm ± 3 mm (1⅛ ± ⅛ inch) above top of tank

Flow Rates (Valve Only)

Service

• 3.52 m³/h (15.5 gpm) @ 1.03 bar (15 psi) drop
• Kv = 3.4 (Cv = 3.99)

Backwash

• 1.36 m³/h (6.0 gpm) @ 1.72 bar (25 psi) drop
• Kv = 1.0 (Cv = 1.20)

Flow Rate vs. Pressure Drop

See the official PDF for exact tabulated values.

Dimensions

See the official PDF for exact tabulated values.

Performance

Backwash Flow Control

• Cv = 1.20

Service Flow

• Cv = 3.99

Options

• Backwash Flow Control: Not specified numerically, but identified by performance charts.
• Turbine for Demand Units: Standard manifold, 1-inch Autotrol Turbine
• Bypass Valve: Thermoplastic, 1-inch flow path, 13mm (½ inch) NPT male, drain
• Bypass Inlet-Outlet Fitting Kits:
  • Copper, Sweat Tube Adapter
  • CPVC, Solvent Weld Tube Adapter
  • Plastic NPT or BSPT Pipe Adapter
  • Stainless steel NPT or BSPT Pipe Adapter
• Brine Refill Controls:
  • 25 or 19 mm (1 inch or ¾ inch)
  • 0.33 gpm (1.25 Lpm) fixed
  • 0.14 gpm (0.53 Lpm) fixed – optional for small tank applications

Logix Series Controllers

Injector* Performance

*New injectors for high-efficiency regeneration sequence are standard with Logix Controllers. Actual injector performance is dependent on the resin used, tank geometry, elevated drain, etc. This injector data was taken using an empty tank (no resin). See the official PDF for detailed injector performance charts (Injector «F», «H», «L», «K», «G», «J»).

Transformer – All Controllers

• Controller Operating Voltage: 12 VAC (Requires use of Pentair Water supplied transformer)
• Input Supply Frequency: 50 or 60 Hz (Controller configuration dependent)
• Motor Input Voltage: 12 VAC
• Controller System Power Consumption: 3 W average
• Transformer Output Voltage: 12 VAC 150 mA
• Transformer Input Options: 230 VAC 50/60 Hz
• Transformer Plug Options: United Kingdom Plug, Mainland Europe Plug
• All Controllers require the use of a Pentair supplied transformer.
• Additional transformers may be available – call for more information.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror