Water Control Corporation SF Series Owner's Manual page 20

SYSTEM DEFINITIONS
System 4 - Single Unit
Single Tank configuration Time Clock: No Meter Immediate: One
Meter Delayed: One Meter Remote Signal Start
System 5 (2-8 Units) Parallel Interlock)
All tanks in parallel supplying treated water. Each unit in the
system will have its own flow meter/sensor input. The control
will delay the start of Regeneration if another unit is already
in Regeneration. Once that unit has completed a Regeneration
cycle, and has returned to Service, the unit with the longest
regeneration queue time will begin Regeneration. No more than
one unit will be in Regeneration at at time.
System 6 (2-8 Units) Parallel Series Regeneration
All tanks in parallel supplying treated water. Only #1 control
will monitor flow meter/sensor input. When a regeneration is
required for the system, it will regenerate valve address #1
first, immediately followed by #2, then #3, then #4 if installed.
No more than one unit will be in Regeneration at a time.
System 7 (2 Units) Alternating Immediate
One tank online supplying treated water, one tank in Standby.
Only #1 control will monitor its flow meter/sensor input.
Regeneration of a unit will begin after the other control has left
Standby and returned to Service. When the Regeneration cycle
is complete, the regenerated unit will enter Standby. Standby
on each tank is controlled by the relay on the NXT2 circuit
board.
System 8 (2 Units) Alternating Delayed
Immediate Transfer Delayed Regeneration One tank online
supplying treated water, one tank in Standby. Only #1 control
will monitor its flow meter/sensor input. Online unit depletes
its volume. Once this occurs the offline unit comes online. The
previously online unit goes offline and delays its regeneration
until the programmed regeneration time has been reached.
System 9 (2-8 Units) Alternating with Standby
Units
Up to 7 tanks online supplying treated water, one tank
in Standby. Meter/sensor input is required on each tank.
Regeneration of a unit will begin after the other control has left
Standby and returned to Service. When the Regeneration cycle
is complete, the regenerated unit will enter Standby. Standby
on each tank is controlled by the relay on the NXT2 circuit
board.
Fleck NXT2 Timer
System 14 (2-8 Units) Demand Recall
Meter input is required on each tank. Unit #1 will begin In
Service with #2, #3, and #4 (if installed) will begin in Standby.
At least one unit is In Service at all times. When flow rate to the
Primary Service Unit increases to a user specified rate, the
next unit in sequence will move from Standby to Service. As
the flow rate falls below the user specified rate, subsequent
tanks will return to Standby. When the Primary Service Unit
regenerates, the next unit in sequence will becomethe new
Primary Service Unit. As each units capacity is reached, the
controller will initiate a Regeneration of that unit. Depending
on the number of units in the system and flow rate demand,
the regenerated unit will then be placed either into Standby or
Service. Only one unit will be in Regeneration at a time.