2
Introduction
The Series 255 control system combines design
simplicity with NORYL* construction to provide the
user with an uncommonly reliable appliance. The
inherent reliability of the system means a long life of
efficient, trouble-free, uninterrupted soft water luxury.
Should maintenance become necessary, the Series 255
control system offers a unique “separation” capability
illustrated in this manual.
Of interest to the owner and water conditioning dealer
are the design and operation benefits detailed below.
Superior Design
• Fewer parts than any control system of comparable
function and most controls of lesser function.
• Single synchronous low voltage electric motor
provides all the power for the clock 440i timer and
the operation of the control.
• Program clock (timer) provides guest regeneration
capabilitiy.
• Control may be indexed manually with or without
power to its service or regeneration positions. Legend
on timer face plate indicates control valve position.
• No moving parts in water stream means no close
tolerance components subject to fouling. Thus, the
system is especially effective on iron-bearing water.
• No dynamic seals that could cause leakage
through wear or fatigue.
• Control accepts NORYL or brass manifold or
modular bypass valve without modification,
offering complete versatility and easy plumbing for
any installation.
• Brining control valve built into system eliminates
need for an external brine valve.
• Automatic drain flow controller is incorporated in
the system.
Superior Operation
• Direct acting system functions independently of
water pressure. No pistons or diaphragms that
require a minimum water pressure to operate.
• Five-cycle operation provides for downflow
service, upflow backwash, downflow brining,
downflow rinse, downflow purge (fast rinse). A sixth
position is included for timed refill of the brine tank.
• Valve discs are held closed by water pressure
and therefore, are leak tight. The sealing forces are
increased as the water pressure is increased. Valve
seats are in a vertical position, which is the design
position least vulnerable to plugging.
• System operation cannot get out of phase or
sequence. Control always returns to a fixed service
position after regeneration regardless of where in
the regeneration cycle it was started.
• Bypass water is automatically available during
regeneration.
Table of Contents
Introduction ...................................................... 2
Superior Design
Superior Operation
Installation ........................................................ 3
Location Selection
Water Line Connection
Drain Line Connection
Overflow Line Connection
Electrical Connection
Increasing the Length of the
Transformer Cord ............................................ 5
Placing Conditioner into Operation ............... 5
Adjustment of Timer ........................................ 6
Special Features of Timer ............................... 7
Adjustment of Brine Control........................... 7
How to Set the Salt Dial
Removing the Series 255
Control Module for Servicing ......................... 8
Preventive Maintenance.................................. 9
Specifications................................................. 10
Pressure Graphs ............................................ 11
Flow Diagrams ............................................... 12
Replacement Parts ........................................ 14
Troubleshooting ............................................. 18
Disinfection of Water Conditioners.............. 19
* NORYL is a Trademark of General Electric Company