GE Logix 764 User manual

Logix 764 Operation Manual
Models: 293/298 Magnum IT
Twin Alternating
Twin Parallel
Single with Remote Regeneration Start
Multi-Single Tank with Lockout

Table of Contents
Table of Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Installation Profile Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
How To Use This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Icons That Appear In This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Location Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Outdoor Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Assembling the Logix 764 Control to the
Magnum Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Magnum General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
General Installation Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Magnum Valve Installation Guide (Top Mount) . . . . . . . . . . . . . . . . . . . . . . . . 14
Magnum IT Dimensional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Typical Installation Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Camshaft Cycle Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
764 Control Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power Loss Memory Retention . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Flow Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Identifying the Logix Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Display Icons & Cursors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
Keypad — Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Programming Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Placing Water Conditioning System Into Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Level l Programming - 764 Control with 298 Valve, 5 Cycle Conditioner . . . . . . . .28
Level l Programming - 764 Control with 293 Valve, 3 Cycle Filter . . . . . . . . . . . . . .29
Placing Water Conditioning System Into Operation (continued) . . . . . . . . . . . . . . . .30
Quick Cycling the Control 293/298A, 293/298P and 293/298L . . . . . . . . . 30
In Service Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Programming Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Level I Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Level II Programming – P Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33
Programming the Lockout Feature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34
Salt Setting (298 Conditioner) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Level lll Cycle Programming – C Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35
Level IV Viewing History - H Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36
Program Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Manual Regeneration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37
Regeneration Modes for Parallel Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38

Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Connecting the Logix 764 Twin Alternating or Parallel Controls . . . . . . . . 39
Remote Regeneration Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Connecting the Logix 764 Multi Single Tank Control . . . . . . . . . . . . . . . . . . 40
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .41
764 Controller – Error Codes & 298 ”L” with Check Salt Light . . . . . . . . . 41
System Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Magnum Valve Cartridge Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . .44
Magnum Valve Cartridge Removal Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46
Performance Injectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47
Injector Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Magnum Flow Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Refill Control Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Drain Line Flow Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Recommended Backwash Flow Rates for Various Media . . . . . . . . . . . . . .51
764 Logix Magnum Exploded View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
Replacement Components: Logix Magnum Conditioner/Filters . . . . . . . . . . . . . . . .53
Camshaft and Pilot Valve Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Magnum Valve Cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
Injector Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
Refill Flow Control Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Magnum IT Flow Sensor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .57
Installation Adapter Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58
Miscellaneous Kits and Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

3
Safety Information
This water conditioner’s control valve conforms to UL/CE
Standards. Generic valves were tested and certified for
compliance as verified by the agency listing.
• Please review the entire Installation and Operation
Manual before installing the water conditioning
system.
• As with all plumbing projects, it is recommended that
a trained professional water treatment dealer install
the water conditioning system. Please follow all local
plumbing codes for installing this water conditioning
system.
• This system will not make microbiologically unsafe
water safe. Water that is unsafe must be treated
separately from this conditioner.
• This water conditioning system is to be used only for
potable water.
• Inspect the water conditioning system for carrier
shortage or shipping damage before beginning
installation.
• Use only lead-free solder and flux, as required by
federal and state plumbing codes, when installing
soldered copper plumbing.
• Use caution when installing soldered metal piping
near the water conditioning system. Heat can
adversely affect the plastic control valve and bypass
valve.
• All plastic connections should be hand tightened.
Teflon1tape may be used on connections that do not
use an O-ring seal. Do not use pipe dope type
sealants on the valve body. Do not use pliers or pipe
wrenches.
• Do not use petroleum-based lubricants such as
Vaseline, oils or hydrocarbon-based lubricants. Use
only 100% silicone lubricants.
• Use only the AC adapter supplied with this water
conditioning system.
• All electrical connections must be completed
according to local codes.
• The power outlet must be grounded
• Install an appropriate grounding strap across the inlet
and outlet piping of the water conditioning system to
ensure that a proper ground is maintained.
• To disconnect power, unplug the AC adapter from its
power source.
• Observe drain line requirements.
• Do not support the weight of the system on the
control valve fittings, plumbing, or the bypass.
• Do not allow this water conditioning system to freeze.
Damage from freezing will void this water
conditioning system’s warranty.
• Operating ambient temperature: 34° to 120°F
(1° to 49°C).
• Operating water temperature: 34° to 100°F
(1° to 38°C).
• Operating water pressure range : 25 to 100 psi (1.72
to 6.89 bar). In Canada the acceptable operating
water pressure range is 25 to 100 psi (1.72 to 6.89
bar).
• Observe all warnings that appear in this manual.
• Keep the media tank in the upright position. Do not
turn upside down or drop. Turning the tank upside
down or laying the tank on its side can cause media
to enter the valve.
• Use only regenerants designed for water
conditioning. Do not use ice melting salt, block salt or
rock salt.
1. Teflon is a trademark of E. I. duPont de Nemours.

4
Installation Profile Summary
Installation Date: _______________________________
Installation Location: ____________________________
Installer(s): _____________________________________
Phone Number:_________________________________
Valve Number: _________________________________
Application Type: (Softener) (Filter) (Dealkalizer)
Water Source:
(Public Well) (Private Well)
(Surface Supply)
(Other)
Water Test Results:
Hardness: _______________ Iron: _______________
Other: ________________________________________
Misc:
Capacity:________ Flow Rates: ____ min. ______ max.
Tank Size: Diameter _________ Height: ___________
Resin or Media Volume: __________________________
Resin or Media Type: ____________________________
Brine Tank Volume:______________________________
Salt Setting per Regeneration: _____________________
Control Valve Configuration:
Valve Type: ____________________________________
(Hard Water Bypass) (No Hard Water Bypass)
Refill Control:_______________________________ gpm
Injector Control: ____________________________ gpm
Backwash Control: __________________________ gpm
Electronic Demand Settings
P1 Time of day ________________
P2 Day of week ________________
P3 Time of regeneration ________________
P4 Number of days between regeneration (99 day
calendar override) ________________
P6 Amount of regenerant used per regeneration or filter
backwash time (salt setting) ________________
P7 System capacity ________________
P8 Hardness (not used on Filters) ________________
P9 Units of measure ________________
P10 Clock mode ________________
P11 Service interval ________________
P12 Remote regeneration switch delay ____________
P13 Refill sensor control (conditioner only) _________
0 = Off
1 = Salt detector only
2 = Chlorine generation
P14 Refill rate (conditioner only) ________________
P15 Draw rate (conditioner only) ________________
P16 Reserve type (not used for
alternating mode) ________________
P17 Initial average or fixed reserve
(not used for alternating mode)_______________
P18 Flow sensor select ________________
P19 K-factor or pulse equivalent ________________

5
How To Use This Manual
This installation manual is designed to guide the
installer through the process of installing and
starting water conditioning systems featuring the
Logix 764 controller.
This manual is a reference and will not include every
system installation situation. The person installing
this equipment should have:
• Training in the 764 series control and the 298 valve.
• Knowledge of water conditioning and how to
determine proper control settings.
• Adequate plumbing skills.
Icons That Appear In This Manual
WARNING: Failure to follow this instruction
can result in personal injury or damage to
the equipment.
Note: Helpful hint to simplify procedure.
The Logix 764 control can be installed on several type
valves that can have twin alternating, twin parallel or
single tank configuration. The section on Logix 764 start-
up provides a simple explanation of the valve types that
are pre-programmed in the 764 control.
Figure 1 293/398 Valve Layout
Time & Day
Regen Time & Day
Salt Amount
SU MO TU WE TH FR SA DAYS
Capacity
Hardness
Logix 764

6
Figure 2 764 Controller Identification
Figure 3 Remote Start/Multi-Tank Lockout Cable
Figure 4 Twin Sensor Cable
Figure 5 Twin Cable Extension
Location Selection
Location of a water conditioning system is important. The
following conditions are required:
• Level platform or floor.
• Room to access equipment for maintenance and
adding regenerant (salt) to tank.
• Ambient temperatures over 34oF (1oC) and below
120oF (49oC).
• Water pressure below 100 psi (6.89 bar) and above 25
psi (1.7 bar).
• In Canada the water pressure must be below 100 psi
(6.89 bar).
• Constant electrical supply to operate the controller.
• Total minimum pipe run to water heater of ten feet
(three meters) to prevent backup of hot water into
system.
• Local drain for discharge as close as possible.
• Water line connections with shutoff or bypass valves.
• Must meet any local and state codes for site of
installation.
• Valve is designed for minor plumbing misalignments.
Do not support weight of system on the plumbing.
• Be sure all soldered pipes are fully cooled before
attaching plastic valve to the plumbing.
Time & Day
Regen Time & Day
Salt
SU MO TU WE TH FR SA
g/L
PM
MIN
KG
x100
x2
P
HC
Capacity
Hardness
Lbs/ft³
LCD Display
Manual Regen Button
Down Button
Set Button Up Button
Turbine Input
Main Motor &
Optical Sensor
Connection
AC Adapter
(low voltage)
Input
Front
Back
Extension Cable
Connection
No-Salt Detector
(Chlorine Generator)
Connection (not used
Lockout & Remote
Connection
Regen/Start
Multi Single Tank
Dry Contact Signal Input
on Magnum Valves)

7
Outdoor Locations
When the water conditioning system is installed outdoors,
several items must be considered.
• Moisture – The valve and control are rated for NEMA 3
locations. Falling water should not affect
performance. The system is not designed to
withstand extreme humidity or water spray from
below. Examples are: constant heavy mist, near
corrosive environment, or upwards spray from
sprinkler.
Caution: This unit is for dry location use only unless
used with a listed Class 2 power supply suitable for
outdoor use.
• Direct Sunlight – The materials used will fade or
discolor over time in direct sunlight. The integrity of
the materials will not degrade to cause system
failures.
• Temperature – Extreme hot or cold temperatures will
cause damage to the valve or control. Freezing
temperatures will freeze the water in the valve. This
will cause physical damage to the internal parts as
well as the plumbing and conditioning resin. High
temperatures will affect the control. The display may
become unreadable but the control should continue
to function. When the temperature returns to normal
operating limits the display will re-appear. A
protective cover should assist with high temperature
applications.
• Insects – The control and valve have been designed
to keep all but the smallest insects out of the critical
areas. Any holes in the top plate can be covered with
duct tape. The top cover should be installed securely
in place.

8
Assembling the Logix 764 Control to the
Magnum Valve
The control and the Magnum valve work together as an
integral system to ensure synchronization. Follow the
steps outlined below to install the control on the Magnum
valve.
Remove Cam Cover
Remove the cam cover by pressing in on the cover release
tabs (Figure 6). Note the cover locking tab and the slot in
the top plate. When you reassemble the cover, the locking
tab is placed in the slot first and the cover lowered into
position.
Figure 6
Align Camshaft
The camshaft is keyed and should only be engaged or
disengaged when in the position illustrated (Figure 7). If
the camshaft is not in the proper position, rotate the cam
assembly counterclockwise until the camshaft arrow
aligns with pillow block arrow.
Figure 7
Slide Camshaft
Slide the camshaft toward the back of the valve by
pressing on the release tab and pulling on the back end of
the camshaft (Figure 8). The front end of the camshaft will
be flush with the mounting plate.
Figure 8
Mount Control
Mount the control onto the valve by sliding the mounting
tabs over the mounting plate. Note that all models of
Magnum controls mount to the valve in the same manner
(Figure 9).
Figure 9
Engage Assembly
The camshaft will not rotate by hand when engaged with
the controller. The Logix Magnum controller contains a
motor with gears that drive a socket. The camshaft is
keyed to only properly engage the socket when the Logix
controller is in the treated water (Home) position.
If the camshaft is pulled back and not engaged it can be
rotated counterclockwise. Rotate the camshaft to align
the arrows (Figure 7). If the Logix Magnum controller is not
Cover Release Tabs
Locking Tab and Slot
Camshaft Arrow Pillow Block Arrow
Release Tabs
Mounting Plate
Mounting Tabs

9
in the treated water position, cycling the power will cause
the socket to rotate to that position.
Engage the control by pressing on the release tab and
pushing the camshaft into the control (Figure 10). Do not
force the camshaft. If the camshaft does not slide freely
into the control, check the alignment of the camshaft to
the controller. Ensure it is in the proper position (Figure 7).
The Logix controller moves to the treated water (home)
position when first power is applied.
Figure 10
To disassemble the control from the valve, reverse the
assembling procedure.
Inlet, Outlet and Drain Connections
The inlet, outlet, and drain connections are designed to
accept a GE Water Technologies supplied CPVC or brass
adapter (Figure 11). The adapters provide a convenient
union for the three connection ports on the valve. In
addition, they incorporate a positive O-ring face seal for
ease of installation and leak free operation. DO NOT
OVERTIGHTEN THE ADAPTERS. As a general guideline,
hand tightening the nut onto the valve is adequate. If
additional tightening is required, never exceed a quarter
turn beyond the hand tight position.
The outlet of the 2-inch Magnum IT has an integrated
turbine. The turbine measures the flow of water through
the outlet. This information is used by the controller to
determine the best time to recycle.
Figure 11
No Hardwater Bypass Feature
The Magnum control valve may be configured for “Hard
Water Bypass” or “No Hard Water Bypass”. With Hard
Water Bypass, unsoftened or unfiltered wateris allowed to
bypass the Magnum control valve during regeneration or
backwash. With No Hard Water Bypass, a valve cartridge
ensures that no unsoftened or unfiltered water bypasses
the valve during regeneration or backwash.
It is easy to observe which option is installed in the valve.
Note that the Hard Water Bypass End Cap has much
longer standoffs than the No Hard Water Bypass
cartridge. The No Hard Water Bypass assembly looks
identical to the other three valve cartridges on the valve
and has a label identifying the cartridge assembly (Figure
12).
Figure 12
Release Tab and
Camshaft
Normal Standoffs
No Hard Water Bypass
No Unfiltered Water Bypass
Extended Standoffs
With Hard Water Bypass
End Cap

10
Hydraulic Output Signal
An optional hydraulic output signal is available on the
valve. An optional cam lobe on pilot valve #6 is used on the
camshaft assembly to initiate the hydraulic output signal
during regeneration or backwash (Figure 13). The
hydraulic line pressure signal is available through the
1/4-inch connection on the back of the valve marked
“AUX”. See Figure 14. Remove the tube cap installed for
shipping.
Optional cam lobes available are:
P/N 1000554 Provides a hydraulic signal from the
beginning of BACKWASH through the start
of REFILL.
P/N 1000553 Provides a hydraulic signal from the
beginning of BACKWASH through the end
of REFILL.
P/N 1041064 Breakaway cam. Can be programmed to
send a hydraulic signal at any time during
the REGENERATION or BACKWASH cycle.
Note: The camshaft must be turning for
the signal to change states, i.e. switch
from OFF to ON, or from ON to OFF.
Figure 13
Figure 14
Magnum Tank Adapter
The tank adapter on the control valve is designed to be
compatible with a 4 inch-8UN (8 threads per inch) tank
opening. In addition, the adapter is designed to accept a
full 1-1/2-inch (3.81-cm) riser pipe with outside diameter of
1.90 to 1.91 inches (48.26 to 48.51 mm) (Figure 15). The
riser pipe is sealed by an O-ring on the inside of the tank
adapter (Figure 15). It is recommended that the riser pipe
extend beyond the top of the tank by 1/4 inch ± 3/8 inch (6
mm ± 9 mm).
Figure 15
Optional Switch Assembly
A single optional feedback switch kit is available to provide
an electrical signal during the entire regeneration or
backwash cycle (Figure 16). The switch may be wired in
the “Normally Open” or “Normally Closed” position and is
rated for 0.1 amp at 125 volts AC. An optional 5.0 amp
switch at 1/10 HP 125/250 volts AC is available upon
request.
Figure 16
Optional multi-switch kits are available to provide
Optional Cam
Lobe Position #6
“Hydraulic Output
Signal”
Auxiliary
Hydraulic
Output Port
Pilot Drain Port
“AUX”
.375" (9.52 mm)
0.25"
(6.4 mm)
±.375"
(9.5 mm)
O-ring
T
op of Tank
O-ring
Riser O-ring
Tank O-ring
Top of Riser
Normally Closed
Normally Open
Common

11
additional electrical or switch closure signals during the
regeneration or backwash cycles. Coupled with the
optional breakaway cams, signals can be sent to external
system equipment at virtually any time while the control/
camshaft motor is running. Consult the instruction sheet
covering the multi-switch option for additional application
and programming information. The instruction sheet is
sent with the switch kit.

12
Magnum General Specifications
Operating and Environmental
Dynamic Pressure .................................................................................................................................................25 to 100 psig (172 to 688 kPa)
100 psig (688kPa) maximum in Canada
Operating Water Temperature Range..........................................................................................................................34 to 100oF (1 to 36oC)
Ambient Temperature Range............................................................................................................................................ 34 to 120oF (1 to 50oC)
Cap Bolt Torque ............................................................................................................................................... 35 to 40 inch lbs. (3.95 to 4.51 Nm)
Connections
Inlet and Outlet ................................................................................................................................................................................. 2-inch Magnum IT
Tank....................................................................................................................................................................................................................... 4-inch 8UN
Brine...................................................................................................................................................................................................................3/4-inch NPT
Pilot Drain and Auxiliary Hydraulic Out .............................................................................................................................1/4-inch tube fitting
Riser Pipe Fitting............................................................................................................................................................................1-1/2 inch (3.81-cm)
Drain ...................................................................................................................................................................................................1-1/2 inch (3.81-cm)
Physical
Dimensions ...................................................................................................................................................26-11/16" L, 16-1/4" W, 10-11/16" H
Approximate Weight (Valve and Control) ................................................................................................................................23.3 lbs. (10.6 kg.)
Electrical*
Voltage - Logix 764 Series Control..................................................................................................... 12 VAC wall mount transformer only
Power Consumption...............................................................................................................................................................................................4 watts
*See section on Electronic Controls for alternative electrical configurations.

13
General Installation Information
Please review the following items thoroughly to ensure an
efficient and safe installation of the water treatment
system. The typical installation line drawings for the
Magnum valves are shown in Figure 19.
WARNING: Filter media may need to be
properly conditioned before the filter is placed
into full operation. Consult the original equipment
manufacturer for proper procedure.
Operating Conditions - A minimum dynamic
operating water pressure of 25 psig (172 kPa) is
required for the Magnum control valve to operate
properly. Water pressure is not to exceed 100 psig
(688 kPa). In Canada, water pressure is not to exceed
100 psig (688 kPa). Water temperature is not to exceed
100oF (36oC). Do not subject the valve to freezing
conditions.
Space Requirements - Allow adequate space for the
water treatment system and associated piping. A
minimum of 4 1/2 inches (11.5 cm) front and rear
clearance is required for cartridge assembly and removal.
Plumbing - Always follow good plumbing practices and
conform to local codes. Check existing pipes for lime and/
or iron buildup. Replace piping if heavy buildup exists and
initiate the proper treatment to prevent additional
occurrences. Locate the equipment close to a drain that is
capable of handling the maximum drain flow rate during
backwash.
Flexible Connectors - Some tanks expand and contract
over the acceptable range of operating water pressures of
the Magnum control valve. The use of flexible connectors
is recommended on polywound or fiberglass tank
installations of 24-inch (60.96-cm) diameter and larger.
Follow the tank manufacturer’s instructions for more
information.
Inlet and Outlet Piping - Inlet and outlet plumbing should
be adequately supported to avoid excessive loads on the
valve. Install a manual bypass system to provide for
occasions when the water conditioner must be bypassed
for servicing.
Drain LIne Piping - To prevent mineral loss during
backwash, and to ensure proper operation of the control
valve, A DRAIN LINE FLOW CONTROL must be plumbed
into the drain line prior to placing the valve in the service
mode. Flow controls from 5 to 40 gpm (18.92 to 151.4 Lpm)
are available from GE Water Technologies and can be
easily installed in the drain line. Flow controls greater than
40 gpm (151.4 Lpm) must be plumbed externally. Selection
of the proper drain line flow control depends on the tank
size and media used for the installation.
The following general drain line piping guidelines should
be observed:
•1-1/2 inch (3.81 cm) or larger piping
•Should not exceed 20 feet (6.1 m)
•Should not be elevated higher than five feet above the
control valve
•No shut-off valves should be installed in drain line
•Minimal number of elbows and fittings should be
installed in drain line
•Piping must be self-supporting
•Flow control should be installed as close to the
Magnum Series control valve as possible if an external
flow control is used.
Figure 17
Brining System - The Magnum control valve utilizes
timed water refill to add water to the salt tank. A refill tube
with check ball is required in the brine tank that does not
restrict the refill or brine draw flow rate capabilities of the
valve. Although not required, a separate brine valve (safety
float) system is recommended for use with Magnum
installations. Select a “High-Flow” brine valve that does not
restrict the refill or brine draw flow rate capabilities of the
valve. The “Performance Injectors and Magnum Flow
Controls” section of this manual contains flow rate
information for various size injectors and refill controllers.
Pilot Drain - During regeneration, a small amount of
water (200 ml or 1 cup) is discharged from the 1/4-inch
(6.3-mm) tube fitting on the back of the valve marked
DRAIN (Figure 18). To prevent this water from being
discharged to the floor, plumb this connection to a non-
pressurized drain or to the brine tank. Do not plug or
apply back pressure to the pilot drain at any time.
Crimping the pilot drain line or installing the line to go up,
which causes backpressure, prevents the diaphragm
cartridges from shifting properly through the cycles of
regeneration or backwash.
SU MO TU WE TH FR SA DAYS
Time & Day
Regen Time & Day
Salt Amount
Capacity
Hardness
Drain Line Flow Control Disk

14
Figure 18
Magnum Valve Installation Guide (Top Mount)
Before the installation of the internal distribution system
and loading of the media into the tank, the Magnum valve
must be temporarily installed onto the tank. This will
ensure that correct alignment of the inlet and outlet piping
once the internals are installed and the media is loaded
onto the tank.
1. Install tank O-ring into the tank adapter section at the
bottom of the Magnum valve. Be sure to lightly
lubricate the O-ring with the 100% silicone lubricant
provided with the valve.
2. Screw the Magnum valve onto the empty tank until
O-ring touches the top of the tank.
3. Turn (tighten) the Magnum valve an additional 60° to
90° (max).
4. Align valve with plumbing connections to minimize
unnecessary stress.
5. For reference, place a mark on the tank beneath the
front center of the Magnum valve.
6. Remove the Magnum valve in preparation for
installation of the internals and media loading.
7. Prior to loading media, make sure the tank alignment
is correct using the mark on the front of the tank.
8. Cut riser 1/4-inch above the top of the tank, plus or
minus 3/8 inch. Place riser inside the tank.
9. Load media following your supplier’s
recommendations.
10. Follow piping recommendations to provide support
and flexibility. Layout piping to accommodate for FRP
tanks and piping dimensional changes and potential
water hammering. Flexible connectors may be
needed.
11. Proper pipe alignment is needed.
Flex connectors are recommended when installing valves
on FRP tanks that are 24 inches or larger in diameter.
Electrical
1. Electrical requirements for the installation depends on
the configuration of the control.
2. The standard North American Series Logix electronic
control is supplied with a 12 volt AC adapter. Optional
AC adapters must be ordered separately for all
international 12 VAC configurations.
Caution: The Logix Control and supplied AC adapter are
for dry location use only, unless used with a Listed Class 2
power supply suitable for outdoor use.
Lubricants
It is very important that 100% silicone lubricant is the only
lubricant used for installing the Magnum control valve. Any
other lubricant may cause material degradation and
potential failure of the valve components.
NOTE: Some silicone based lubricants contain
petroleum-based ingredients. If there is a question about
the lubrication that you are using contact the lubricant
manufacturer to be sure the product is 100% silicone.
Caution: Plumbing cannot be used for electrical
grounding when metal inlet and outlet piping is
connected to a non-metal valve.
Connect the inlet and outlet piping together using a
grounding strap or clamp to establish continuity.
Auxiliary Hydraulic
Output Port - Plugged
Pilot Drain Port

15
Magnum IT Dimensional Specifications
2-Inch Inlet and Outlet, 1 1/2-Inch Drain
13-15/16
(35.5 cm)
4-7/16
(11.3 cm)
26-11/16
(67.8 cm)
4-1/2
(11.4 cm)
4-1/2
(11.4 cm)
1-1/16
(2.7 cm)
11-3/4
(29.9 cm)
15-7/16
(39.2 cm)
4-7/16
(11.3 cm)
13-1/2
(34.2 cm)
9
(22.9 cm)
7-1/2
(19 cm)
2-15/16
(7.5 cm)
6-1/2
(16.5 cm)
7
(17.8 cm)
9-3/4
(24.8 cm)
16-1/4
(41.3 cm)
1-11/16
(4.3 cm)

16
Typical Installation Drawings
Figure 19
Twin Tank
Multiple Tank

17
Camshaft Cycle Positions
The front end of the camshaft has an indicator cup. The
cup has slots in the outer edge and cycle numbers on the
inside face.
Remove the cover and look over the top of the 764 control
to view the cycle numbers. The number in the opening,
(Figure 20) indicates the current cycle position of the
control valve. The corresponding slot for the number is
positioned at the optical sensor, which is rotated
approximately 90 degrees out of phase.
Cycle Indicators:
0 = Treated Water
1 = Backwash Cycle
2 = Regenerant Draw Cycle
3 = Slow Rinse Cycle
5 = Fast Rinse Cycle
8 = Regenerant Refill Cycle
Figure 20 View with Cover and Logix Control Removed
764 Control Operation
Power Loss Memory Retention
The 764 control features battery-free Time of Day and Day
of Week retention during loss of power. A super capacitor
is designed to keep time for 8 to 24 hours depending on
the installation. If the super capacitor is exhausted the
Logix control will display four dashes
(- - :- -) immediately upon power up. The Time of Day and
Day of Week must be reset.
All other programmed parameters are stored in the static
memory and are retained.
Number of Current
Cycle

18
Flow Diagrams
The Magnum control valve utilizes a series of pilot valves to
properly position the diaphragm valve cartridges (Figure
21). The pilot valves are activated by the camshaft (Figure
22). The flow diagrams that follow represent the Service
Cycle for a 5-cycle conditioner and
3-cycle filter configuration. Both the Hardwater Bypass
and No Hardwater Bypass service flow diagrams are
presented.
Figure 21 Pilot Valve Principle of Operation, Front View
Figure 22 Cam Assembly
Spring Spring
Front
Back