Page 9
Diatomaceous Earth Pool Filters - DEV Series Filter
Table 2.
DE Slurry Mixture
Model
No.
DE Quantity
No. of 1 lb.
Coffee Cans
(lbs.)
(kg.)
DEV48
5.0
2.0
10
DEV60
6.0
2.7
12
4.2 Coating the Filter Grids
1.
Prepare the recommended amount of DE as
outlined in Section 4.1.
2. Start
the
fi
lter system as outlined in Section 4.3.
3.
With the pump running and the pool skimmer
valve open, slowly pour the mixture directly into
the pool's skimmer basket. The slurry will be
drawn into the
fi
lter.
4.
After coating grids, rotate the bezel of the
pressure gauge so that the arrow next to the word
"CLEAN" is aligned with the needle of the gauge.
This marks the original starting pressure of the
system.
5. Clean
the
fi
lter when the pressure of the system
increases so that needle of the gauge aligns with
the arrow next to the word "DIRTY" on the bezel
of the gauge. This indicates an increased pressure
of between 10 and 12 psi above original starting
pressure.
4.3 New Pool and Seasonal Start-up
1. Set
the
fi
lter valve (two (2) or three (3) port
diverter or backwash) to the "FILTER" position.
2.
Open the pump hair/lint pot lid and
fi
ll the pump
basket with water to prime the system. Replace the
lid. (You may have to do this several times on new
and seasonal start-ups.)
3.
Completely open the air release valve on the
gauge/air release assembly by turning the knob on
the back of the assembly fully counterclockwise
(do not remove the knob).
4.
Be sure to open any
fi
lter isolation valves that
were installed in the system and make sure that the
fi
lter drain plug is in place.
5.
Stand clear of the
fi
lter
and start the pump to
circulate water through the system. When a steady
stream of water starts to come out of the air release
valve, close the valve.
6.
If this is a new
fi
lter, or the
fi
lter has just been
backwashed, add the DE slurry as described in
section 4.2.
7.
Watch the pressure gauge to be sure that the
pressure does not exceed 50 psi in the
fi
lter for
normal operation. If the pressure approaches these
limits, turn off the pump and backwash the
fi
lter
(see Section 6.2). If the pressure remains high after
backwashing and reapplying the DE slurry, refer
to the troubleshooting guide on page 14 to identify
possible causes and solutions.
8.
After the pressure gauge has stabilized, turn the
bezel ring so that the arrow next to the word
"CLEAN" aligns with the needle of the gauge. As
the
fi
lter cleans the water, the grids will clog over
time, and the pressure will increase. When the
needle of the pressure gauge aligns with the arrow
next to the word "DIRTY" on the bezel ring, it is
time to backwash the
fi
lter (see Section 6.2).
4.4 Valve Operation
1. The
fl
ow of water through a DE
fi
lter is controlled
by an optional backwash valve or two (2) or three
(3) port diverter valve.
2.
The handle on top of the backwash valve or
diverter valve can be moved to different positions.
The function of each position is described below.
See Figure 8.
NOTE
Depending on the model of backwash valve or
diverter valve installed with your
fi
lter, it may have all
or only some of the positions described in Table 3.
Figure 8. Diverter Valve Handle Positions
Rinse
Clo
sed
Rec
irc
ula
te
B
a
c
k
w
a
s
h
Wa
ste
F
il
te
r
R
