Starting The Pump And Filter System; Before Starting The Pump; Pre-Coating; Operation - Hayward Pro-Grid Owner's Manual

Page 5 of 12

STARTING THE PUMP and FILTER SYSTEM

WARNING

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" socket on a torque wrench, torque clamp
nut to clamp bolt to 150 inch-lbs. Verify that the filter manual air relief body is in the LOCK position, and no filter
components are missing, damaged 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
Figure 1

Pre-Coating

Add the correct amount of D.E. (see specifications on the front page of this manual or on the filter label) into the system
through the skimmer – as fast as the plumbing will take it. Record the pressure gauge reading after the D.E. has been
added. This is the "pre-coat" or "clean" pressure.

OPERATION

WARNING
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 8-10 psi (.55-.69 bar) 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.
TM
Pro-Grid VERTICAL D.E. SERIES FILTER
Tighten clamp bolt
and nut using a
torque wrench to
150 inch-lbs.
CLAMP BOLT
Figure 2
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
ISDE2423 REV C
Manual Air Relief Shown Open
In Locked Position
Figure 3