1

5

4

3

6

72

FIGURE 4 - 21" Filter clamp tighten- ing sequence.

1

5

7

 

3

4

8

6

2

FIGURE 5 - 25" Filter clamp tight- ening sequence.

CLEANING THE FILTER

When to Clean:

NOTICE: If installation does not allow backwashing, use manual cleaning proce- dure regularly (see Page 10).

1.With a new filter:

A.Record filter operating pressure at startup. When pressure reaches 15 PSI (103kPa) above startup operation pressure, stop pump for 15-30 seconds to allow filtering cake to release.

B.Restart pump to form new cake. Pressure should now be less than 10 PSI (69kPa) above startup operating pressure.

C.If pressure is still more than 10 PSI (69kPa) above startup operating pressure, backwash filter (see below).

2.Thoroughly clean air relief filter screen (Key No. 2, Page 15) on top of manifold EVERY time filter is opened. Be sure to remove all debris from screen. Replace filter screen if damaged.

3.At least twice a year, manually clean filter according to instructions, Page

10.At least once a year, follow instructions under "Chemical Filter Cleaning Procedure", Page 11, as well.

Filter Backwash Procedure:

To prevent equipment damage and possible injury turn pump OFF before changing valve position.

NOTICE: Before backwashing with a separation tank, review separation tank own- er's manual for instructions.

1.Stop pump.

2.Change valve position.

A.If using Multi-port Valve, set to backwash position.

B.If using Two Position Slide Valve, raise handle to fully extended position.

3.Start pump, circulating water backwards through filter to flush cake and con- taminants into separation tank or waste.

4.If system has a sight glass, backwash until water in glass runs clear.

5.If system does not have a sight glass:

A.Backwash one minute.

B.Stop pump; reset valve to 'FILTER' position.

Stop pump before changing valve setting!

C. Restart pump; filter for 20 seconds.

D. Repeat steps A, B, C three times. Cycling is effective when cake and con- taminants are difficult to break and flush out of filter.

NOTICE: Do not vacuum pool while backwashing filter.

6.Stop pump.

7.Open air release valve and release ALL pressure from tank and system.

8.Follow 'Disassembly' procedure, Page 8, to remove top of filter.

Hazardous pressure. Risk of severe personal injury and major property damage if tank is opened while under pressure or while pump is running.

9

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Pentair S7D75 Cleaning the Filter, When to Clean, Filter Backwash Procedure, Stop pump before changing valve setting
Page 8 Page 10

S7D75, S8D110 specifications

Pentair has made a significant mark in the world of pool and spa equipment with its impressive range of products, including the S8D110 and S7D75 models of filter systems. These two models are designed to provide superior filtration performance and are suited for both residential and commercial applications, ensuring clean and clear water for pool enthusiasts.

The Pentair S8D110 is a robust and high-capacity filter that features a durable construction, making it suitable for larger pools. One standout characteristic of the S8D110 is its efficient filtration mechanism. It utilizes a high-efficiency, radial flow design that enhances water flow while reducing pressure drop, leading to improved energy efficiency and lower operational costs. The model boasts a large filter area, which translates to less frequent cleaning and maintenance. This feature is especially beneficial for pool owners who desire a low-maintenance solution without compromising on the quality of water.

On the other hand, the Pentair S7D75 provides a more compact option for smaller pools while still accommodating effective filtration needs. This model features a streamlined design, making it easier to install and requiring less space. Like the S8D110, the S7D75 employs advanced filtration technology that ensures enhanced water clarity and purity. It incorporates innovative media options that improve dirt-holding capacity, allowing for extended periods between cleanings.

Both the S8D110 and S7D75 models benefit from Pentair's commitment to delivering sustainable solutions. They are designed with features that promote eco-friendliness, including energy-efficient pumps that minimize energy consumption during operation. Moreover, their construction involves materials that are resistant to corrosion, enhancing the longevity and reliability of the systems.

In terms of operational ease, both models present user-friendly attributes such as easy-to-access filter elements and clear labeling for straightforward maintenance. Their compatibility with various pool setups also makes them versatile choices for pool professionals and homeowners alike.

In summary, the Pentair S8D110 and S7D75 are exemplary filter systems that combine advanced technology, durable construction, and user convenience. These models illustrate Pentair's dedication to innovation while providing effective solutions for maintaining pristine pool environments, catering to diverse pool sizes and owner preferences. Whether for residential or commercial use, these filters ensure that clear, clean water remains a priority for all users.
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