User's guide
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swimming pool equipment User's guide

Pahlén AB Pahlén is a genuine Swedish company with more than 40 years experience of manufacturing quality products for swimming pools. Our main selection consists of five product groups: Heating equipment, pumps, Jet Swim, stainless steel pool equipment and measuring and dosing equipment. Ever since the company was founded in 1967 the business has been focused on developing and manufacturing swimming pool equipment. Our range includes today equipment for every type of pool, from small private pools to large public baths. The Pahlén products are made of bronze and acid-proof stainless...

High quality products from Pahlén A well-maintained pool with clean, clear, sparkling water promises many enjoyable moments, as well as a refreshing dip in the morning or an evening swim in the glow of the pool lights. Your pool will come to be the place where your family and friends naturally congregate. We have produced this guide for you, the pool owner. It explains how a pool works and how you look after it to get the greatest possible enjoyment from your pool installation. Many people think that having a pool involves a lot of work, but if you look after the circulation system and take...

Installation examples With heat exchanger There are many different models of the Pahlén heat exchangers. They are made of acid-proof stainless steel, titanium or plastic and are available in sizes from 13 to 308kW. Light Main drain Thermostat The example shows the installation of the heat exchanger Maxi-Flo. Heat exchanger Circulation pump With electric heater The Pahlén electric heaters are available in many models with different combinations of safety equipment. Inlet Jet Swim Light Light Main drain They are made of acid-proof stainless steel, titanium or plastic and are available in...

Start Commissioning a newly-filled pool or starting in the spring 1. When starting in the spring, re-install pool components removed for the winter, close drain valves and refit drain plugs. Fill the pool until the water level is in the centre of the skimmer opening. Fill the filter basket housing on the pump with water. NOTE: Never start the pump without water as this might damage the shaft seal. Open the valves of the suction, return and drain outlets. Turn the lever on the valve to BACKWASH. Start the pump. When the pump has evacuated the air out of the suction line (after about 1-3...

Cleaning the filter sand Puhl©B After about 5-10 days, or when the reading of the pressure gauge on the pump side of the filter has increased by about 0.2 bar (20 kPa, 3 psi) since the last backwash, backwash the filter as follows: 2. Close the valves on the suction and return lines. 3. Open the cover of the pump and empty the filter basket. 5. Open the valve to the drain outlet. 6. Turn the lever to BACKWASH. 7. Open the valves to the suction and return lines. 8. Start the pump. Rinse the filter for about 1 to 2 minutes or until the water in the sight glass is clear. NOTE: Any electric...

The circulation system of the pool Skimmer Water is removed from the pool via a skimmer which has a flap lid that positions itself according to the surface of the water. The skimmer increases the flow rate of the surface water and draws any debris on the water surface into the skimmer. The debris accumulates in a filter basket. The basket must be emptied regularly, about once a week. If your pool has a main drain, the flow must be regulated so that about 30% of the water is taken from the bottom and about 70% from the skimmer. Inlets The cleaned and heated water is returned to the pool via...

Chemical cleaning The pool water must be clear and totally free of both visible and invisible dirt. Visible dirt is mainly removed by the pool filter. The invisible dirt is made up not only of bacteria, which can multiply very rapidly and cause problems, but also algae and fungi of various kinds which spread to the pool, where they find the conditions pleasant. Chemical agents are used to combat and control these. To make sure the water in the pool is crystal clear and clean, it needs to be chemically treated for: Disinfection The pool water is disinfected to kill organisms such as...

Standard routines for good water care Daily chlorination Daily chlorination is the most effective way of disinfecting the pool water. Calcium hypochlorite in small tablets dissolves slowly and releases chlorine into the pool water. Place the tablets in the skimmer or in a floating dispenser. Shock chlorination is done with calcium hypochlorite but in granular form. The granules dissolve quickly to give the pool water a rapid and powerful chlorine boost. Daily as well as shock chlorination raise the pH of the water. Use a pHlowering agent to balance the pH once a week and after every shock...

pH - Chlorine pH The pH is a measure of the acidity of the water. The pH scale goes from 0 to 14, where pH 7 is neutral. If the pH is above 7, the water is basic; if it is below 7 the water is acid. The optimum pH for pool water is 7.4, since this is the same as the pH in human eyes and mucous membranes. A pH of 7.4 also gives good chlorine disinfection. A low pH gives: - aggressive water, which damages the mechanical components of the pool - irritations of the eyes and mucous membranes - damage to the pool liner A high pH gives: - poorer chlorine disinfection - skin irritation - lime...

Total alkalinity - Calcium hardness Total alkalinity (TA) Total alkalinity is a measure of the amount of alkaline substances in the water. These may cause the pH of the water to change in an uncontrolled manner. A low TA makes the water aggressive and causes rapid pH fluctuations. A high TA makes the pH difficult to adjust and causes cloudiness and lime precipitation. The guideline figure when using calcium hypochlorite (daily or shock chlorination) is 60-100 ppm (mg/l) and with trichlorisocyanuric acid (weekly chlorination) and Halobrom 90-125 ppm (mg/l). Total alkalinity can be reduced...