Pentair SM/SMBW 2000 - Manual (Page 14)

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SM/SMBW 2000 Series™ Filter Installation and User’s Guide
How to Clean Filter Manually & Winterizing Instructions
(Required at least once a year and when winterizing your filter to prevent damage during freezing conditions.)
1. Turn pump off.
2. Set valve handle or valves for backwash position, (for SMBW only).
3. STAND CLEAR OF THE FILTER - Turn pump on and run for 3 minutes, then turn pump off.
4. Drain filter with respect to opening the air relief valves as discussed in a, b, and c, below.
a. To drain filter Model SM with gate valves, open drain valve and tank air relief valve and close all other
valves.
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.
b. To drain filter model SMBW, set valve handle to backwash position and open tank air relief valve.
c. To drain filter model SMBW with Separation Tank, set valve handle to backwash position; open tank air
relief valve; close all other valves and remove drain plug on backwash line.
5. To remove the clamping ring, partially unscrew the adjustment knob and release the head of the T-bolt from
the slotted bracket.
6. Remove tank lid with screwdriver or with a tool available from the manufacturer, see page 9, Figure 5. Avoid
cutting rubber O-ring or bending of lid or tank O-ring channel.
7. Use garden hose to rinse down filter elements until all debris has been flushed from tank. Then screw drain
plug on backwash line on models with Separation Tank.
8. Unscrew wing nut; remove washer and unclip air vent tube from holding wheel. Remove holding wheel.
WARNING — Please heed all manufacturers' posted instructions, warnings and cautions when using
muriatic acid.
9. Lift out filter elements and scrub each element with a soft brush. If elements are coated with scale, it will be
necessary to brush with a mild solution of muriatic acid (10 parts water to 1 part muriatic acid). Rinse elements
with water.
10. Remove manifold and inspect for damage. Replace rotor O-ring & lubricate as needed.
11. Replace clean elements in manifold sockets; notch on element will guide it to proper position. All elements are
interchangeable.
12. Replace holding wheel over center rod; place washer over rod and turn holding wheel until elements spread
to widest gap. Replace washer, then screw wing nut on rod. Do not tighten nut beyond finger tight. Be
sure to clip air vent tube back into slot on holding wheel. Clean vent tube screen cap of any debris.
13. 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.
14. 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.
15. Replace the clamping ring. Engage the head of the T-bolt into the slotted bracket and tighten the adjustment
knob. (Hand tighten only.)
16. To restore to the filter cycle, refer to the operating and cleaning instructions of the filter model involved. When
winterizing, ensure that all water is removed from the lower internal portion of the filter.