12 Culligan® CSM Series Softeners
12 Cat. No. 01016370
Operation
Modes of Operation
Time Clock
The controller will initiate a regeneration based upon a time schedule of either hours (between 1 to 24 hours), 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 user determined gallon capacity of the wa-
ter softening equipment. The controller can also 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 immedi-
ate 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 systems, all on-line
simultaneously) require one flow device for each mineral tank in the system.
This method is a good, cost effective means to operate a water softening system.
Progressive Flow
Used with up to six and as few as two mineral tanks in a system, the Progressive Flow mode 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 resin 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 have 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. Up to 6 tanks can be connected for progressive flow.
Utilizing the progressive flow feature may allow the owner to use smaller water softening models, resulting in the potential
for reduced capital and operation costs.
Aqua-Sensor
The Aqua-Sensor detects when the 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.
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