DAYLIFF DX Filter
Installation & Operating Manual
Index
1. Filter Specifications
Congratulations on selecting a Dayliff DX Filters. They are manufactured to the highest standards and if installed and operated correctly will give many years of efficient and trouble-free service. Careful reading of this Installation Manual is therefore important, though should there be any queries they should be referred to the equipment supplier.
A visual display shows four DAYLIFF DX filters of varying sizes, arranged from smallest to largest.
The DAYLIFF 'DX' filter range is a comprehensive selection of swimming pool filters suitable for both domestic and light institutional pool applications. Combining the latest filtration technology with nearly twenty years of production experience the range offers outstanding reliability, longevity, performance and value. Five models in different sizes are available, all providing the following features:
- Elegant moulded filter bodies of non-corroding GRP construction for strength and longevity.
- Simple to use flange connected six-position multiport valves with union connections. The flange arrangement greatly simplifies installation and media replacement as well as providing a secure watertight seal.
- Specially designed internal collector laterals providing maximum filtration and backwashing efficiency and minimal media loss.
- High-grade silica sand and glass media for exceptional filtration performance.
It must be remembered that the most important aspect of a pool's appearance is the quality of its water. The key to this is efficient filtration and a pool's filter is the one piece of equipment where compromise does not pay. DAYLIFF 'DX' filters are quality products which have been carefully designed to combine the highest standards of performance with outstanding reliability and ease of operation. With a DAYLIFF filter clean, sparkling water is assured at all times.
OPERATING PARAMETERS
| Model | Rated Flow (m³/hr) | Pump Options (Dayliff / DAB) | Pool Capacity (Litres) | Recommended Piping Size | ||||
|---|---|---|---|---|---|---|---|---|
| Power, kW | Power, kW | Light Use | Normal Use | Heavy Use | Suction | Delivery | ||
| DX300 | 4 | 0.55 (DPL550) | 0.33 (SPP50M) | 40,000 | 30,000 | 25,000 | 1.5" | 1.5" |
| DX500 | 10 | 0.55 (DPL550) | 0.33 (SPP50M) | 100,000 | 80,000 | 60,000 | 1.5" | 1.5" |
| DX600 | 14 | 0.75 (DPL750) | 0.5 (SPP75M) | 140,000 | 115,000 | 85,000 | 2" | 1.5" |
| DX750 | 22 | 1.1 (DPX1100) | 1.1 (SPP150M) | 220,000 | 180,000 | 130,000 | 2.5" | 2" |
| DX800 | 25 | 1.1 (DPX1100) | 1.5 (SPP200M) | 250,000 | 200,000 | 150,000 | 2.5" | 2" |
| DX900 | 32 | 1.5 (DPX1500) | 2.2 (SPP300M) | 300,000 | 240,000 | 180,000 | 3" | 2.5" |
FILTER DIMENSIONS AND PERFORMANCE
| Model | Filter Area (m²) | Dimensions (mm) | MPV Valve Size | Pressure (Bar) | Weight (kgs) | |||
|---|---|---|---|---|---|---|---|---|
| H | D | Test | Working | Nett | Working* | |||
| DX300 | 0.07 | 830 | 300 | 1/2" | 4.5 | 3 | 11 | 115 |
| DX500 | 0.20 | 830 | 520 | 1/2" | 4.5 | 3 | 13 | 170 |
| DX600 | 0.3 | 980 | 620 | 1/2" | 4.5 | 3 | 15 | 250 |
| DX750 | 0.43 | 1060 | 770 | 1/2" | 4.5 | 3 | 21 | 420 |
| DX800 | 0.43 | 1280 | 770 | 2" | 4.5 | 3 | 25 | 525 |
| DX900 | 0.67 | 1400 | 925 | 2" | 4.5 | 3 | 32 | 820 |
* Includes media and water
A schematic illustrates the filter's components, including the multiport valve, inlet from the pool, outlet to the pool, and waste outlet. Dimensions 'H' (height) and 'D' (diameter) are indicated.
2. Installation
2.1 Pipe Connections
The recommended piping layouts for “freeboard" and "decklevel" pools are shown below. Piping should be uPVC Class C or D. Alternatively G.I. Piping can be used if there is a risk of fracture.
Pipelines should be laid with as few bends as possible and either level or at an even rising slope to the pump as changes in slope can lead to air pockets and consequent operational problems. The backwash pipe must fall evenly to a suitable discharge point below the level of the filter.
It is recommended that isolating valves be installed on the pool suction adjacent to the pool wall and on the main drain, skimmer and vacuum connections at the pump suction. A valve should also be fitted on the pool return pipe if the inlets are below water level. The filter is supplied complete with union connections to facilitate equipment removal if ever necessary. Connections to the Multiport Valve are indicated on the appropriate outlets.
DECK LEVEL LAYOUT
Diagram showing the piping layout for a deck-level pool, illustrating the main drain, inlets, vacuum, balance tank, pump, filter, and waste connections.
FREE BOARD LAYOUT
Diagram showing the piping layout for a freeboard pool, illustrating skimmers, main drain, vacuum, inlets, valve chamber, pump, filter, and waste connections.
2.2 Filter Positioning
When the Multiport Valve is clamped, the handle of the valve in the ‘FILTER’ position should line up with the manufacturer's name plate. The filter should therefore be positioned to take account of this BEFORE it is charged with media.
2.3 Media Charging
The filter is provided with suitably graded media which should be gently poured into the filter as per the details given below.
A diagram illustrates the concept of 30% freeboard for expansion during backwash within the filter.
MEDIA CHART - Sand Media
| MODEL | LAYER 1 | LAYER 2 | LAYER 3 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| GRADE | DEPTH (MM) | BAGS (No.) | GRADE | DEPTH (MM) | BAGS (NO.) | GRADE | DEPTH (MM) | BAGS (NO.) | |
| DX300 | C | 175 | 0.6 | A | 200 | 1.5 | NONE | - | - |
| DX500 | C | 200 | 1.0 | A | 200 | 2.3 | NONE | - | - |
| DX600 | C | 200 | 2.0 | A | 200 | 4.5 | NONE | - | - |
| DX750 | C | 200 | 2.0 | A | 200 | 4.5 | NONE | - | - |
| DX800 | C | 175 | 2.0 | A | 200 | 4.0 | B | 160 | 2.0 |
| DX900 | C | 200 | 4.0 | A | 200 | 6.0 | B | 110 | 2.0 |
*Each standard DAYLIFF media bag is 1ft³ (0.03m³) & weighs approx. 50 kgs
When charging proceed as follows:
- Disconnect the inlet, outlet and backwash pipes from the Multiport Valve at the union connectors.
- Unscrew and remove the Multiport Valve clamp and lift out the valve, which is sleeved on to an extension from the bottom collector pipes. This pipe should now be blocked with paper or a cloth to prevent the ingress of media during charging.
- Charge with media as per the instructions given above.
- Replace the Multiport Valve ensuring that both the valve neck and collector O-rings have first been smeared with petroleum jelly. Note this should be done whenever the Multiport Valve is removed.
- It is also important to ensure beforehand that all sand has been removed from the filter O-ring seat and the O-ring itself to prevent leakage.
Rotate the Multiport Valve to align the outlet ports with the piping and ensure proper seating. When properly seated the clamp should be secured ensuring uniform torque but not over tightening of the clamp bolts. If the joint weeps under pressure, reseat the MPV in a different position ensuring it is properly seated on the filter neck. Over tightening will damage the filter.
2.4 Commissioning
When commissioning, the following procedure must be followed ensuring the MPV is properly set:
- Open all suction valves and ensure that the pump strainer is filled with water.
- Open any valve on the return side of the filter.
- Set Multiport Valve to 'BACKWASH' and start pump.
- Check flow at the backwash pipe and allow the pump to run until the backwash water is observed as reasonably clean, a minimum of five minutes being recommended. This step is essential as the filter media is not fully pre-washed and this procedure rinses the new sand clean. Note that as the filter is initially empty it will take time to fill and there will be a delay of a minute or two from when the pump is switched on to when flow is observed.
- Stop pump and turn MPV to 'RINSE'.
- Start pump and allow media bed to rinse until waste water is observed as clean. Stop pump and turn MPV to 'FILTER'.
- Start pump and allow system to operate until a steady flow is noticed at the pool inlets. As the system is not primed it will take time for all air to be expelled, so be prepared for a delay of up to ten minutes before a steady flow is apparent.
⚠ WARNING: Under no circumstances should the position of the Multiport Valve be changed when the pump is running. Always switch off the pump first or serious equipment damage may result.
3. Operation
3.1 Use of Multiport Valve
DAYLIFF filters are fitted with a Multiport Valve to control filter operation. There are six positions on the valve and the various operations possible with the different settings are described below.
FILTER
Diagram showing water flowing from the pump, through the filter media, and returning to the pool. The normal operating position. Water from the pump is fed into the top of the filter and after passing through the media is collected at the bottom. It is then returned to the pool through the inlet pipes.
BACKWASH
Diagram showing water flowing from the pump, reversed through the filter media, and discharged to waste. During normal operation the filter will accumulate dirt in the media bed. This is cleaned by a process of backwashing when the filter flow is reversed and water is pumped from the bottom to the top of the filter and then to waste. It should be carried out whenever the filter pressure exceeds the clean running pressure by 0.3Bar, there is a noticeable reduction in inlet flow or weekly, whichever is sooner. The backwashing process normally takes 2-3 minutes and should be continued until the waste water in the sight glass is observed as clear.
RINSE
Diagram showing water flowing from the pump, through the filter media, and discharged to waste. After backwashing the filter media needs to be rinsed. Water is pumped into the top and out of the bottom of the filter as for normal filtering, but is then discharged to waste. This removes any residual dirt in the media instead of returning it to the pool. Rinsing should not take more than one minute and again the sight glass on the side of the valve can be used to see when the water is clear.
RECIRCULATE
Diagram showing water bypassing the filter and flowing directly back to the pool. In this position the filter is by-passed and the water is pumped straight back into the pool. It will normally only be necessary to use this position if there is a problem with the filter itself (e.g. a leak or major blockage). It can also be used if the filter is on a spa bath to increase the pressure at the hydro-jet inlets.
WASTE
Diagram showing water flowing from the pool, bypassing the filter, and discharged to waste. The waste position is used for emptying the pool. The filter is by-passed and water is taken straight from the pool to waste. If it becomes necessary to empty the pool make sure that the pump is not switched off once the operation begins as there may be problems with priming when the water level is below the pump. This position can also be used for vacuuming to waste. This may be necessary if there is a large amount of sediment on the floor of the pool which would rapidly clog the filter.
CLOSED
Diagram showing all flow to the filter is shut off. This shuts off all flow to the filter. In pool applications it is most frequently used to isolate the filter when removing the line strainer lid to clean the basket.
3.2 Maintenance of Filters
DAYLIFF filters need no routine maintenance other than regular backwashing. However, over time the media will progressively clog and become less effective. The period will depend upon the pool installation and usage, though is normally some years. Ineffective media becomes apparent through reduced filter efficiency and when this occurs re-charging with new media will be necessary.
Important Note: The pipe connections must be correctly done as shown above. Hand tightening is adequate for the MPV unions and under no circumstances should a pipe wrench be used. If the union weeps, add more thread tape on the union threads and make sure to check that the union O-Ring is in place.
4. Trouble Shooting
| FILTER PROBLEM | POSSIBLE CAUSE | SOLUTION |
|---|---|---|
| Water coming out not clear | Flow rate very high | Regulate flow rate to optimal levels to ensure adequate filtration time |
| Filter not working well | Check that the filter is in good condition | |
| Clogged sand filter | Back wash the filter | |
| Low clean water flow | Feed pump not working well | Check that the pump performance has not dropped drastically |
| Filter clogged | Back wash the filter | |
| System's pipeline clogged | Check that the pipeline is not clogged and clean pipe if it's the case | |
| No water supply at all | Feed pump failed | Repair or replace the pump |
| Feed pump failed | Repair or replace the pump | |
| Valve arrangement control | Check the right valves have been closed or opened for the right process operation | |
| Filter clogged | Backwash the filter |
5. Terms of Warranty
i) General Liability
- In lieu of any warranty, condition or liability implied by law, the liability of Dayliff (hereafter called the Distributor) in respect of any defect or failure of equipment supplied is limited to making good by replacement or repair (at the Distributor's discretion) defects which under proper use appear therein and arise solely from faulty design, materials or workmanship within a specified period. This period commences immediately after the equipment has been delivered to the customer and at its termination all liability ceases. Also the warranty period will be assessed on the basis of the date that the Distributor is informed of the failure.
- This warranty applies solely to equipment supplied and no claim for consequential damages, however arising, will be entertained. Also the warranty specifically excludes defects caused by fair wear and tear, the effects of careless handling, lack of maintenance, faulty installation, incompetence on the part of the equipment user, Acts of God or any other cause beyond the Distributor's reasonable control. Also, any repair or attempt at repair carried out by any other party invalidates all warranties.
ii) Standard Warranty
General Terms
If equipment failure occurs in the normal course of service having been competently installed and when operating within its specified duty limits warranty will be provided as follows:
- Up to three years - The item will be replaced or repaired at no charge.
- Over three years, less than five years - The item will be replaced or repaired at a cost to the customer of 50% of the Davis & Shirtliff market price.
The warranty on equipment supplied or installed by others is conditional upon the defective unit being promptly returned free to a Davis & Shirtliff office and collected thereafter when repaired. No element of site repair is included in the warranty and any site attendance costs will be payable in full at standard chargeout rates.
