Modes of Operation
Time Clock
The controller will initiate a regeneration based upon a time schedule of intervals of days (i.e., every 3 days) or
on a specific day of week schedule (i.e., Mondays, Wednesdays and Saturdays). Because regeneration will
occur at the prescribed schedule regardless of water use, this method is usually the most inefficient method of
water softener operation.
Flow Meter/Sensor
When a flow meter or sensor is connected to the controller circuit board, the controller has the ability to measure
the amount of water treated and initiate a regeneration sequence based upon the gallon capacity of the water
treatment equipment. The controller can delay the regeneration signal until a convenient time of day (known as
a delayed regeneration) or act and initiate the regeneration sequence as soon as the signal is received (known
as immediate regeneration).
When installing an alternating duplex system (one tank on-line, the other in standby), only one flow measuring
device is required to be installed in the common outlet header of the system. Parallel systems (multiple tank sys-
tems, all on-line simultaneously) require one flow device for each mineral tank in the system.
This method is a proven, cost effective means to operate a water softening system.
Aqua-Sensor (Softener use only)
The Aqua-Sensor detects when a softener resin bed has reached its point of exhaustion and, as a result, initiate
a regeneration sequence. This is the most cost-effective method of operation and may be combined with any of
the operational modes previously described.
Progressive Flow
The Progressive Flow mode is used with up to six and as few as two mineral tanks in a system. It allows more
than one tank in a system to either be on-line or off-line depending upon the downstream flow demand. If flow
demand is greater than the flow capability of the tank on-line, another tank can be brought on-line to help satisfy
the excess demand. Once the demand has decreased, the second tank is returned to a standby mode and the
system reverts to just one tank on-line providing treated water.
The progressive flow mode of operation relies on a user programmable set point or Trip Point. The Trip Point
is a unit of flow (gallons or liters) on a per minute basis. Once attained the trip point will cause the second unit
(in multiple resin tank system) to come on-line. Each additional tank in the system will subsequently be brought
on-line as multiples of the trip point are attained. (Example: a 3 tank system with a trip point of 50 gpm will bring
two tanks on-line once the facility flow demands is equal to or greater than the 50 gpm trip point. Should the flow
demand reach 100 gpm or more, the third tank shall be brought on-line.)
Additional tanks shall be returned to stand-by once the facility flow demand is <95% of the trip point for two
tank systems, <95% of 2X the trip point for triplex systems and <95% of 3X the trip point for quad systems, and
remains there for 60 seconds.
Utilizing the progressive flow feature may allow the owner to use smaller units, resulting in the potential for
reduced capital and operation costs.
Differential Pressure (Filters only)
When combined with an optional differential pressure device, the Culligan MVP controller has the ability to
initiate a backwashing sequence when the pressure differential across the media bed reaches a preset amount
(usually 8 to 10 psi).
Operation
Installation 4
3 CULLIGAN GLOBAL ELECTRONIC CONTROLLER
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