Browse Forums Pools & Spas 1 Jan 27, 2013 3:26 pm Hi, after some delay my new pool has finally been installed but I need some advice on equipment selection and setup. I have Viron EvoP320 pump with a cyclone pre filter going into a Davey 25 inch sand filter. I am trying to get the most bang for buck from the 3 speed pump whilst keeping the pool clean. In the manaul for the sand filter it details the max flow rate and min backwash flow rate but it doesn't mention the min flow rate when in filter mode. I am trying to run the pump at low speed, approx 1450 rpm which notionally gives 140lpm according to manual, will this be enough for the sand filter? Second question, I have seperate piping (suction and return) for a pool heating system and have purchased a heat pump (swimtek 8kw) and am looking for a suitable circulation pump. Ideally I want the quietest and least power hungry pump I can get, does anyone have any reccomendations? Third question, how is the circulation pump for a pool heat pump system that is seperate to the filtration circuit typically controlled/actuated? Cheers in advance Re: Help with New Pool Setup 2Jan 27, 2013 4:33 pm In answer to your first question is the lower the flow rate the better the filter works. This is dependant on correct skimmer & return location & doesn't work as well removing leaves from the surface. Running at low speed is very efficient but will require longer run times . It is a good idea to run pump at high speed for 15minutes on start up then reduce to low speed there after. The run time required will vary depending on things such as pool capacity, sun on pool, usage of pool, temp of water & leaves & dirt getting in there. Get to know your pool by testing every few days for the first month. I recommend doing some research on pool water ballance & getting a really good test kit. I have been finding lately most pool shops will sell you lots moe chemicals than necessary . With your heat pump you would be better off running it through the filtration system. Why run a 2nd pump . The provisions are for solar heating which needs to run its own pump. Good luck with your pool Re: Help with New Pool Setup 3Jan 28, 2013 1:08 pm Hi Wheeliworks Thanks for the advice. I have been using the 4in1 test kit that came with the pool and cross checking with the water testing available at Clark Rubber and all seems good. The Chemigem system seems to have no trouble keeping the pool balanced which is good. Your right, the extra piping was run in should solar be required. The chemigem system is installed at the suction point of the pump and I believe the heat pump would be plumbed in after the sand filter (should it be placed in the filtration circuit). Would this cause any issues set up this way, I note that a lot of heat pump vendors say the chemicals must be injected after the heat pump? Re: Help with New Pool Setup 4Jan 28, 2013 1:30 pm That's right you can't run a high concentrate of chemicals through the heater. If you mentioned to your pool builder you were getting a heat pump at a later date they should have connected the injection after the filter & fitted a bypass for the heater. You will see a diagram in the manual. It is still possible to do this but I would recommend getting a professional to do it. The other way is to fit a pump to solar suctions . Most heat pumps don't have a control feed to start a pump. Your options are to use a 3/4 HP pump & turn it on & off manually or you can connect it through a solar type temp controller & timer Re: Help with New Pool Setup 5Jan 31, 2013 12:04 am Found the Dontek unit for heatpumps, its rebadged as an Aquatight H7 and they want $770 for it. Too rich for me at this stage but it does everything I was looking for. I picked up a cheap secondhand Filtermate timer and I'll use that for the time being and see how it goes. I also have a line on a Waterco Aquamite 0.5hp pump for a reasonable price. Are they a good brand? Re: Help with New Pool Setup 6Feb 05, 2013 12:36 am An update I got the Emaux 1/3 HP pump and just have to plumb it in to the heat pump and I'll be ready for winter Now I have been having another drama with my chlorinator, its a chemigem D10. It keeps going nuts and putting too much acid in the pool. I have had it in to the manufacturer and they claim its working fine and just needed the probe calibrated. I reinstalled it and within 5 days it did it again. Went back down to the manufacturer and had a long debate with one of the technicians that left me in no uncertainty that I will get no help from them what so ever. I purchased a hurlcon Vx6t and will be converting my pool to saltwater, I spoke to several pool shops and equipment sellers and every one of them reccomended this course of action. They mostly all concurred that the chemigems were expensive to keep going over time, seems that the concept is good but the execution poor. Has anyone else had issues with Chemigem chlorine/acid dosers? Re: Help with New Pool Setup 7Feb 05, 2013 10:24 pm I have tried a few auto acid feeders but yet to ever see a accurate one I have seen ph as high as 9 when set at 7.2. I haven't used a chemigen before But I have seen many disconnected. A salt chlorinator is a excellent investment & will repay itself in a very short period of time. It's a pity you were poorly advised when you bought your pool . Maybe try & sell chemigen on eBay Re: Help with New Pool Setup 8Feb 06, 2013 10:30 pm wheeliworks I have tried a few auto acid feeders but yet to ever see a accurate one It's a pity you were poorly advised when you bought your pool . Your not wrong about the poor advice, they sold me a chlorine pool dosing system and a cartridge filter both of which now have been replaced due to non-performance. The concept of auto dosing to maintain levels is good but the actual execution is terrible. The VX unit is in and operating, generating chlorine as I type. A different feel to a salt pool, not overly salty like the ocean but noticeable..feels kinda soft and not as sharp as the chlorine pool, I like it. The cartridge filter was a giant pain with air ingestion and cleaning (so much for the salesman saying it only needs cleaning once a year), the sand filter is a dream by comparison. My advice to would be pool purchasers is go salt and use a sand filter. I'm still debating whether the expensive 3 speed pump was worthwhile, I think I would have been just as happy with a cheap decent single speed. Re: Help with New Pool Setup 9Feb 09, 2013 9:12 am Hi veno i glad your happy with your new sand filter but the cartridge filter supplied to you must have been too small or badly plumbed. If air is entering the filtration system there is a problem with the plumbing or water level.i use & recommend cartridge filters in most installations. The secret is to use a filter much larger capacity than manufactures specs. I use 150sq foot filters for pools & spas up to 16000 litres then 400 sqft filters up to 50000 lit then 600 sqft after that. We set the pool up so it should need cleaning max 4 times per year in normal conditions. I have had recently phone calls from 2 customers stating the water is circulating slowly only to find they haven't cleaned their filter for 7-8 months. 15 minute clean & all good again. The only time I use a sand filter is on a farm or rural setting where lots of dust can be a problem for a cartridge system. A element will last between 4-6 years & will cost less than a sand replacement Re: Help with New Pool Setup 10Feb 10, 2013 3:21 am I had the Hurlcon ZX150 and I believe they did oversize it for my small pool but it never worked well. I ended up redoing every connection they made (they buggered up a heap as I discovered) and rearranging the layout and composition of the equipment. Not all of it was due to the poor work of the pool builder as I had to remove the equiopment for paving and I also put in a small plastic shed, which was the main reason for getting rid of the caartridge filter as there was no headroom to remove it any more. Very happy with the sand filter and very happy with salt chlorinator. The only issue I have now is with the viron pump not driving the cell properly on low speed, after a few mins a dangerously large air pocket forms in the front part of the cell. On a good note, I plumbeb in my outdoor shower today No more lingering salt residue or dashes thru house to shower it off.. Re: Help with New Pool Setup 11Feb 10, 2013 8:57 pm No air should be in the system. If air gets into the system it means you have a suction problem between skimmer box & pump the most common cause is either the o- ring on the inlet of pump or the seal on the lid when the pump is off does the water drain beck to the pool ? If you are salty when getting out of the pool you probably have too much salt in the water. . You should only have a very very slight taste if you tasted it . I use a 20kg bag per 8000 litres . Running too high a concentrate isn't good long term for pump chlorinator or paving, decking, plants Re: Help with New Pool Setup 12Feb 12, 2013 2:22 am wheeliworks No air should be in the system. If air gets into the system it means you have a suction problem between skimmer box & pump the most common cause is either the o- ring on the inlet of pump or the seal on the lid when the pump is off does the water drain beck to the pool ? Since I redid the majority of the connections after the paving and pool shed installation, air ingress is no longer a problem like it used to be Seems that when you push flow below the min for cell you get the air/gas build up issue (thread on it over at whirlpool). wheeliworks If you are salty when getting out of the pool you probably have too much salt in the water. . You should only have a very very slight taste if you tasted it Personal preference, all things being equal in an ideal world I like fresh water (obviously chlorined dosed), the salt water has been a good compromise after my chemigem experience (my salt is 3200ppm according to pool shop). The last home I lived in didn't have a pool and when i went to sell it the agents were not happy, even telling me to put one in to sell the place. The agents weren't happy… 2 2558 In addition to protecting your children, glass pool fencing has the benefit of being simple to clean and maintain. You probably won't need anything more expensive or… 0 3036 Hi everyone, Looking for some advise. We are about to build an above ground pool in our backyard. There is a private sewer line running under the pool at 1.6m… 0 7642 |