Pentair SM/SMBW 2000 important safety instructions Section Maintenance, To Backwash Clean Filter

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Section 4

Maintenance

To Backwash (Clean) Filter

WARNING — To prevent equipment damage and possible bodily injury and/or property damage, always turn the pump off before changing the valve positions.

1.Pressure backwashing is accomplished in four easy steps:

a.Turn pump off.

b.Rotate handle of rotary valve 90o as shown in Figure 2.

STAND CLEAR OF THE FILTER.

c.Turn pump on.

d.Backwash for approximately two minutes or until effluent appears clean. When backwashing is complete, turn pump off, rotate handle back to filter position and you are ready for filter operation again. Precoat filter with D.E. as shown on

page 4, Table 1. Figure 2.

How to Clean the Separation Tank, performed after each backwash operation. (If installed or if applicable.)

The purpose of the separation tank is to collect the spent diatomaceous earth during backwashing (cleaning) of the filter. It must be cleaned after each backwash to prevent any clogging problems. It is recommended that this procedure be repeated to ensure complete backwashing of the filter. One backwashing may not be sufficient.

1.Open valve “C” and valve “D”* to drain separation tank. While the tank drains, the filter can be pre-coated and restored to the filter cycle. Be sure valve “B” is closed. See Figure 3.

WARNING — *Valve "D" is the air relief valve. It is important that this valve be opened before proceeding

further. The tank is pressurized and is dangerous if the air is not vented prior to removing the lid clamp. Failure to open the air relief valve could cause the lid to separate resulting is serious bodily injury and/or property damage.

2.To remove the clamping ring, partially unscrew the adjustment knob and release the head of the T-bolt from the slotted bracket.

3.Remove tank lid with screwdriver or with a tool available from the manufacturer, see page 9, Figure 5. Avoid cutting rubber O-ring.

4.When water has drained from bag, remove bag from tank by grasping the handles of the bag with both hands; pushingdownwithonehand;pullingupwiththeotherandliftingbagout.

5.Turn bag inside out and empty contents is a waste container. Rinse bag with garden hose.

6.Install bag in tank with the rim of the bag immediately below the tank inlet opening, then push downon therimopposite the inlet opening until the rim is level.

7.Remove rubber O-ring and clean both O-ring and channel. Lubricate O-ring with a non-water soluble grease or silicone lubricant and replace O-ring in channel.

8.Clean the inside surface of the tank lid where it seals against the O-ring. Place lid on tank; push down on lid to seat in-place.

Figure 3.

9.Replace the clamping ring. Engage the head of the T-bolt into the slotted bracket and tighten the adjustment knob. Hand tighten only.

SM/SMBW 2000 Series™ Filter Installation and User’s Guide