O P E R A T I O N A N D M A I N T E N A N C E M A N U A L
PAGE # 13
PF-50 Series Filter (ver. 4/5/05)
The 24 hour time clock initiates a backwash cycle at any specified time in the day. The backwash clock comes
preset from the factory for a backwash cycle to occur every 24 hours of run time (see figure #2).
By moving the pins (in or out) on the 24 hour time clock, the number of backwash cycles in a 24 hour peri-
od can be adjusted. Every pin represents 15 minutes of a 24 hour period. For every non-consecutive
pin pulled out in a 24 hour period, the filter will backwash. The time clock can only initiate a backwash once
every 1/2 hour. Pins pulled out consecutively will initiate a backwash once and then lock out any further
backwash cycle 15 minutes for each consecutive pin pulled out. In order to eliminate the 24 hour time
clock from initiating a backwash cycle, move all pins in toward the center.
SETTING 24 HOUR TIME CLOCK
Figure 2
Pin Out
PULL SINGLE PIN OUT
to initiate backwash cycle
at desired time.
NOTE:
If a Programmable logic controller (PLC) is supplied, a 48 hour clock has been programmed
into the PLC. The automatic backwash cycle is initiated every 48 hours of run time (minimum). Every
initiation of the backwash cycle, whether initiated manually or automatically, will reset the 48 hour clock.
NOTE:
The 24 hour time clock is a non-resetting clock.
NOTE:
The 7-day timer works in the same manor as the 24 hour timeclock except each pin
represents 2 hours.
