6
Hazardous pressure.
Can cause severe
injury or major
property damage
from tank blow up
.
Release all pressure
and read instructions
before working on filter.
INITIAL START-UP
Be sure pump is OFF before starting procedure.
Do not operate these filters at more than 50 PSI (345 kPa) under any
circumstances!
To prevent serious damage to the element fabric, NEVER run
your DE filter without a diatomaceous earth precoat!
1. Securely lock Posi-Lok™ ring in place by rotating ring CLOCKWISE until it
“clicks” past the safety latch (see Figure 3). Stop turning as soon as the ring
clicks past the latch. The ring may feel slightly loose, but it will tighten up
when pump is on and filter is under pressure.
2. Fill trap on pump with water.
3. Open air release valve on top of filter.
4. Open isolation valves.
5. Start pump to purge air from system.
6. When steady stream of water comes from air release valve, close the valve.
NOTICE:
Leaking around the Posi-Lok™ ring may indicate that the ring is
not fully locked. In this case, proceed as follows:
A. Stop the pump, close the isolation valves, and open the air release valve
to release any pressure within the filter.
B. Remove the drain plug and drain all water from the filter.
C. Push down on the top of the filter to fully seat the upper tank shell.
D. Rotate the Posi-Lok™ clockwise until it locks behind the safety latch
(see Figure 3).
E. If the ring was already locked, remove it and the upper tank shell.
Inspect and clean the O-ring and all sealing surfaces. Relubricate the
O-ring.
NOTICE:
Lubricate O-ring only with the silicone grease provided or equiva-
lent, as other lubricants may cause the ring to swell. DO NOT lubricate
Posi-Lok™ ring or threads on lower tank shell as this may collect grit and
make removal difficult.
7. To prepare precoat slurry, mix diatomaceous earth (DE) and water. Use four
pounds of DE for Model AT8236; use six pounds of DE for Model AT8230.
DO NOT use more DE than recommended.
NOTICE:
Using more than the recommeded amount of DE will clog the fil-
ter. Using less than the recommended amount will give an uneven precoat
and shorten the lifespan of the element.
8. Empty slurry slowly into skimmer to precoat filter element with an even fil-
tering precoat.
After filter is operating, record filter pressure gauge reading in owner's manual
for future use.
NOTICE:
When installed on a new pool, after approximately 48 hours of op-
eration disassemble filter and clean out plaster dust , construction debris, etc.
(see “Module Cleaning Procedure", Page 8).
FILTER DISASSEMBLY/
ASSEMBLY PROCEDURE
Hazardous pressure. Before disassembling filter:
1. STOP PUMP.
2. CLOSE isolation valves.
3. OPEN air release valve and drain fitting.
4. WAIT until all pressure is released and water drained from filter tank and
system before loosening Posi-Lok™ Ring.
Depress Safety Latch
to unscrew Posi-Lok™
RELEASE
RELEASE
Figure 4 – Depress safety latch to
unscrew Posi-Lok™ Ring.
RELEASE
RELEASE
Latch
2149 1195
Tab
Figure 3 – Rotate Posi-Lok™
Ring until tab locks behind the
safety latch.
