This way you can just budget maybe 50 bucks a month for the rest of your life to cover the replacement pumps. Grundfos is one of many pump companies who tries to build a Variable Speed Drive directly into their pump, so you won't have any choice over how it is controlled. Keeping it simple and mechanical (no electronics) is the best way to get 30 years out of a pump like that. Adding a simple mechanical (no electronics) Cycle Stop Valve can make the JP series deliver the same constant pressure as a variable speed type pump. The JP series doesn't have any electronics except for the old reliable 40/60 pressure switch. Grundfos still makes some good pumps like the JP series jet pump. They made it real easy to just remove the old one and install another one.Īs with any variable speed pump, there is so much electronics in the controls, you could have many different problems. They don't make any money on pumps that last 30 years. That is the exact goal of the manufacturer. But hey it only cost 600-700 bucks, so just replace it every few months when it starts acting up. There sure are lots of problems discussed in the reviews of this product for it not to even be a year old. But I don't see that symptom in any of the instructions. With other Grundfos products like the SQE, when the pressure transducer fails the pump reverts to cycling on and off as if it had a regular pressure switch. It doesn't sound like the variable speed part is working at all. I see where others who had that same problem added some air to the tank, and it seemed to help some. There is a lot of sales information on that pump, but very little on technical instructions. I am wondering if adding a pressure reducing valve to the supply side to keep the pressure at 40 (maybe even set it to 35) might resolve the issue? I do notice that sometimes my incoming pressure is 40, others its 45, sometimes even 50. Could this be caused by fluctuating incoming pressure. Anyone know what it should be set to for incoming pressure of 40 and outgoing of 70?ģ. Could it be the internal pressure tank? It is precharged at the factory to 18.5 psi. Does anyone know what causes this issue?Ģ. I have 10 more days to return it for a full refund, so if I cannot get it to work properly i will uninstall and perhaps go with a CSV type solution.ġ. But, I've got the SCALA2 installed and would like to try to make it work. I'll add that I have read the forums and understand there is some difference of opinion on VFDs and grundfos pumps. I've had 5 taps open at once all at 70psi, so when it works its pretty cool. I open another tap and it seamlessly keeps the pressure constant. I open a tap and it runs until the tap is closed. In low pressure areas, this simple solution saves having to install a pump for an entire heating system and allows the focus to instead fall solely on the shower unit.At other times, the thing runs like a champ. Grundfos Watermill shower pumps are designed to boost the power of the water flow specifically in the shower. With a low noise level encased in a high quality component, it is easy to understand why this pump is cemented as a go-to for all domestic systems up to 35kw. A brand new energy saving three-speed motor is coupled with pump-to-system matching, which results in a significant reduction in hydraulic noise. These circulators have been designed to cater for the majority of domestic wet heating systems. Two of the most popular Grundfos central heating pumps are the Selectric 15-60 and Selectric 15-50. These pump units include the pioneering permanent magnetic motor technology. Their overall aim is to improve efficiency across a whole system. Central heating circulators can be used for both heating and cooling applications. This range of pumps is industry leading, EuP compliant and highly energy efficient. Grundfos are one of the leading manufacturers of central heating circulators. The self contained cold water booster set is designed for homes where the current water supply does not have sufficient pressure to meet the demand and requirements put on it. Grundfos is well known for its home booster units. Pump Sales Direct hold the largest stock of Grundfos throughout the United Kingdom. Grundfos pumps manufacture some of the most popular and reliable commercial and domestic water pumps available on the market. Potable Water Expansion / Pressure Vessels.Stuart Turner Aquaboost ibolt Booster Set.Stuart Turner Aquastor Hot Water Cylinders.Stuart Turner Mainsboost Water Boosting Systems.Lowara Stainless Steel Domestic Ecocircs.Grundfos TP Commercial Circulator Pumps.
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