Hayward PRO-GRID DE4820 Guide De L'utilisateur page 14

Before Starting the Pump
1. Use ONLY Hayward clamp system components; DEX2421JKIT clamp system, DEX2421J2 nut/bolt assembly, DEX2422Z2
metal reinforced seal. Non-Hayward clamp components may fail in use and cause explosive component separation.
Verify that upper and lower filter bodies are properly secured with the filter body clamp. Never rely on hand tightening the
clamp nut to the clamp bolt. Using a ¾ inch socket on a torque wrench, torque clamp nut to clamp bolt to 17 Nm (150
inch-lbs). Verify that the filter manual air relief body is in the LOCK position, and no filter components are missing, dam-
aged or not genuine Hayward components. (See Fig 2)
2. Close filter drain. Note: Filter plug requires an o-ring seal. (See Fig 4)
3. Open all system valves to allow water from the pool to the filtration system and from the filter to return to the pool.
4. Place the manual air relief valve in OPEN position. (See Fig 2)
Starting Pump
1. When starting system pump, do not stand over or near filter. If water leakage appears at filter tank clamp, immediately
turn off all system circulation pumps and all electrical power. Do not return to the filter until all water leakage has stopped.
Reassemble the clamp system per the instructions on page 7 in this owner's manual to stop leak.
2. Return to filter to CLOSE manual air relief valve only when a steady stream of water (not air or, air and water mix) is
discharged from the manual air relief valve.
3. To avoid damages to the grid elements, DO NOT operate the filter for more than a minute or two without the D.E. pre-coat.
Clamp nut
Clamp Bolt
Figure 1
Pre-Coating
Add the correct amount of D.E. (See specifications on the filter label) into the system through the skimmer – as fast as the plumb-
ing will take it. Record the pressure gauge reading after the D.E. has been added. This is the "pre-coat" or "clean" pressure.
FILTERING
Filtration starts as soon as the filter has been pre-coated. As the
filter removes dirt from the pool water, the accumulated dirt causes a
resistance to flow. As a result, the gauge pressure will rise and the flow
will decrease. When the pressure rises 0.55-0.69 bar (8-10 psi) above
the pre-coat pressure, it is time to backwash (clean) the filter. Once your
filter is running and there is a pressure reading, line up the green arrow
with the current reading. (See Fig 3) When the pressure rises to or above
the red or second arrow, it is time to clean your filter.
Note: During initial clean-up of the pool, particularly with a new pool or a
very dirty pool, it may be necessary to backwash more frequently due to
the heavy initial dirt load in the water.
Page 5 of 8
Tighten clamp bolt
and nut using a
torque wrench to
17 Nm (150 inch-lbs).
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
STARTING UP
To Open
Figure 2
OPERATION
Pro-Grid
Manual Air Relief Shown Open
To Close
0,5 - 0,7 bar
8 - 10 PSI
Clean pressure
Place the green
Arrow here
0 Bar
Figure 3
In Locked Position
Time to backwash
(clean) filter
pressure reaches
red arrow
Rev. A