Section 4. Start-Up And Operation; Preparing Diatomaceous Earth; Coating The Filter Grids - Jandy DEL Series Installation And Operation Manual

Diatomaceous Earth Pool Filters - DEL Series Filter

Section 4. Start-Up and Operation

WARNING
NEVER start pump while standing within fi ve (5)
feet of the fi lter. Starting the pump while there is
pressurized air in the system can cause the fi lter
lid to be blown off, which can cause death, se ri ous
personal injury or property damage.
WARNING
NEVER operate the fi lter system at more than 50 psi
of pressure. Operating the fi lter system in excess of
50 psi can cause the fi lter lid to be blown off, which
can cause death, serious personal injury or property
damage.
WARNING
Changing the multiport valve handle while there is
pressurized air in the system can cause the fi lter
lid to be blown off, which can cause death, se ri ous
personal injury or property damage.
Caution
Dust released during normal handling of diatomaceous
earth can cause eye and respiratory irritation. Prolonged
breathing of excess concentrations of dust may cause
lung damage.
Caution
Never operate fi lter in excess of three (3) minutes
without use of diatomaceous earth (DE). DE is the
substance that fi lters the water, the fi lter cloth merely
supports the DE. Operating without DE will damage
fi lter grids and short en fi ltering cycles.
Caution
DO NOT operate fi lter at water temperatures above
120° F (65.5° C). Water temperatures above the
manufacturer's recommendations will shorten the life
span of the fi lter and void the warranty.

4.1 Preparing Diatomaceous Earth

Your fi lter requires diatomaceous earth (DE) for proper
fi ltration and operation. The fi lter grids must be
precoated with DE in order to protect their surfaces and
provide the most effi cient fi ltering action. Refer to
Table 3 for the proper quantity of DE to use with your
fi lter.
1. Using a one (1) pound coffee can, fi ll the can
with diatomaceous earth (DE). Do not pack or
compress the DE into the can.
2. Mix the required amount of DE with suffi cient
water in a separate bucket to make a thin, milky
mixture (slurry).
NOTE
Excess DE will clog the system. Use amount
specifi ed in this manual.
3. Use the following instructions to coat the fi lter
grids.
Table 2. DE Slurry Mixture
Model DE Quantity
No.
(lbs.)
DEL48 5.0
DEL60 6.0

4.2 Coating the Filter Grids

1. Prepare 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 of 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.
Page 9
No. of 1 lb.
Coffee Cans
(kg.)
2.0 10
2.7 12