Autotrol Magnum Cv 942, Installation And Service Manual, Page: 23 / 86

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5.0 Control Settings
5.1 Manual
Series 942Man Controls
The 942Man represents the maximum in versatility and
ease of operation for the manual control valve system.
Upgrade to an automatic system is easily
accomplished by switching the manual control to a
clock or demand control.
DO NOT TURN THE INDICATOR KNOB CLOCKWISE
AT ANY TIME.
Regeneration Instructions
1. Move indicator knob COUNTERCLOCKWISE from
the Regeneration Complete position to the center
of the Backwash (Figure 5.1) position. DO NOT turn
the knob clockwise.
Figure 5.1
2. The indicator knob should remain in the Backwash
position for the appropriate amount of time.
Specific backwash times are determined by the
inlet water quality (i.e.: the amount of iron,
manganese, turbidity), the amount of time between
regenerations, water pressure, and flow. The
typical backwash time is 10-15 minutes*. The unit
should be in backwash until water at the drain is
clear.
3. When the backwash is complete, move the
indicator knob COUNTERCLOCKWISE to the
center of the
Brine/Slow Rinse position
(Figure 5.2). See the “Suggested Brine Draw/Slow
Rinse Table” to determine the correct draw/rinse
time. Please note that the tables are given at three
salting levels and four pressures. The indicator
knob should remain in the
Brine/Slow Rinse
position for the time* indicated in the table.
Figure 5.2
4. When the slow rinse is complete, move the
indicator knob COUNTERCLOCKWISE to the
center of the
Fast Rinse position (Figure 5.3). The
indicator knob should remain in the Fast Rinse
position for the appropriate amount of time.
specific fast rinse times are determined by water
quality, clarity of drain water, water pressure, and
flow. Fast rinse serves to eliminate excess salt and
repack the resin bed for the service run. Typically
fast rinse should continue for 5 - 15 minutes*.
Important: If excessive fast rinse time is required to
return the service effluent to quality, there could be an
underlying cause, such as low pressure, fouled resin
bed, fouled injector, etc.
Figure 5.3
5. When the fast rinse is complete, move the indicator
knob COUNTERCLOCKWISE to the Refill position
(Figure 5.4). Determine the correct refill time* from
Table 5.1 below. The indicator knob should remain
in the
Refill position for the time indicated in the
table.
*Note: The times given are only general guidelines.
Adjustment of the times may be necessary for specific
applications and conditions.