Tom Hitter that air pressure vent requires a quick connect/release attachment, due to chamber not having a large volume tank. There appears to be just enough pressure added at factory and requires more air pressure if looking to operating pump continuous at higher pressures. I'm also of the opinion that there is some type of cluch device to switching the pump into a higher speed too, still going to contact Grundfos technical support for specific information.
Just got done installing this pump. I was also trying to figure out why the pump was starting and stopping, no where in the manual does it let you know what is going on with this pump. However, it does talk about an internal expansion tank. At first I thought this vent was to bleed air during pump prime. No water ever came out. I then got a air pump and added pressure back into this tank. I added pressure to achieve 80 PSIG. Now the pump is able to maintain a constant pressure at its highest set point without that constant starting and stopping issue. Hope this solves your problem.
Its mechanical problem with the pump from the sound of it. My scala 2 doesnt sound anything like this. That screeching is it because there is foreign body in the pump?
Hi Tom, i wonder how good is this pump when it comes to low sound? from your video it looks a bit noisy but compared to regular pumps that are not designated as silent... how different do you think it is ?
For above 3.5bar u need to have at least some preshure at inlet ,according to manual thats why its doing that The pressure settings 4.5, 5.0 and 5.5 bar (65, 73 and 80 psi) require a minimum positive inlet pressure which is maximum 4 bar (58 psi) lower than the required outlet pressure. Example: If the required outlet pressure is 5 bar, the minimum inlet pressure must be 1 bar (14.5 psi).
There is a water leak that’s why the pump won’t stop. From my understanding the pump motor speed automatically adjust depending on the number of taps being used to maintain a constant pressure. Unlike those conventional booster pump . You should not install additional external pressure tank.
That is the exact problem that I have. My booster pump is installed in the dining hall, and it kept running and cutting off and running and cutting off constantly and I thought that it was backfilling the plumbing that we have hooked to it because we have several wells went together along with a 10,000 gallon reservoir, but in further research, I realized the two outlets on the face of the pump have checked valves, so that should not be the case and after reading your comment, I noticed that I had a toilet that had a bad flapper in the dining hall, and as soon as I fixed it the pump built pressure and stayed until I used water again. Great advice my friend.
The MQ also had a built in tank and those kept running even at low flow. The Scala 2 is also supposed to do that and do it even better because it is variable speed. The Scala 2 is quieter while it is running steadily but the cycling when just one faucet is running undoes that benefit. I'm sure there is a fix.
The internal expansion tank is not large enough to handle hot water expansion of the hot water tank. Most building codes require at least a 2 gallon expansion tank.
Hola soy plomero de México instale 2 bombas grounfos Scala 2 se an usado poco ..porque la casa no está habitada todavía..se desenredo Sarón por aproximadamente 2 meses y ahora que las quise arrancar no tienen presión y en el panel de la bomba marca como si la cisterna no tuviera agua . Pero está llena de agua ..que es lo que pasa ahí ..el voltage está bien la válvula de pie (pichancha) está bien la bomba arranca bien .( No está obstruida que pasa..en el manual no vienen posibles fallas y soluciones. Ojalá contesten mi comentario gracias...
Hola! Estoy teniendo un problema. La bomba no arranca y no encuentro ese error puntual en el código de luces del manual. Dejo imágenes por si a alguien le pasó y puede ayudarme th-cam.com/video/lJlbuEkWSzU/w-d-xo.html Gracias!
Hola! Estoy teniendo un problema. La bomba no arranca y no encuentro ese error puntual en el código de luces del manual. Dejo imágenes por si a alguien le pasó y puede ayudarme th-cam.com/video/lJlbuEkWSzU/w-d-xo.html Gracias!
Tom Hitter that air pressure vent requires a quick connect/release attachment, due to chamber not having a large volume tank. There appears to be just enough pressure added at factory and requires more air pressure if looking to operating pump continuous at higher pressures. I'm also of the opinion that there is some type of cluch device to switching the pump into a higher speed too, still going to contact Grundfos technical support for specific information.
Just got done installing this pump. I was also trying to figure out why the pump was starting and stopping, no where in the manual does it let you know what is going on with this pump. However, it does talk about an internal expansion tank. At first I thought this vent was to bleed air during pump prime. No water ever came out. I then got a air pump and added pressure back into this tank. I added pressure to achieve 80 PSIG. Now the pump is able to maintain a constant pressure at its highest set point without that constant starting and stopping issue. Hope this solves your problem.
Any chance you can show it a video i have the same problem thanks!
Its mechanical problem with the pump from the sound of it. My scala 2 doesnt sound anything like this. That screeching is it because there is foreign body in the pump?
Hi Tom, i wonder how good is this pump when it comes to low sound? from your video it looks a bit noisy but compared to regular pumps that are not designated as silent... how different do you think it is ?
For above 3.5bar u need to have at least some preshure at inlet ,according to manual thats why its doing that
The pressure settings 4.5, 5.0 and 5.5 bar (65, 73
and 80 psi) require a minimum positive inlet
pressure which is maximum 4 bar (58 psi) lower
than the required outlet pressure.
Example: If the required outlet pressure is 5 bar,
the minimum inlet pressure must be 1 bar (14.5
psi).
There is a water leak that’s why the pump won’t stop. From my understanding the pump motor speed automatically adjust depending on the number of taps being used to maintain a constant pressure. Unlike those conventional booster pump . You should not install additional external pressure tank.
isn;t the leak indicator light be blinking?
That is the exact problem that I have. My booster pump is installed in the dining hall, and it kept running and cutting off and running and cutting off constantly and I thought that it was backfilling the plumbing that we have hooked to it because we have several wells went together along with a 10,000 gallon reservoir, but in further research, I realized the two outlets on the face of the pump have checked valves, so that should not be the case and after reading your comment, I noticed that I had a toilet that had a bad flapper in the dining hall, and as soon as I fixed it the pump built pressure and stayed until I used water again. Great advice my friend.
Hi. I have 3 of those scala2 water pump. 2 of them run nonstop even when I close the output pipe. It keeps running. What’s going wrong?
Mine too.. Is it normal?
just had a plumber install mine and its real aggravating to hear it kick on and off, if you find a permanent solution let me know!
1. replace the suction check valve
2. remove the external tank
3. squeak - most likely you will need to replace the seal under warranty
With this pump you do not need that extra tank. that's why its short cycling.
The MQ also had a built in tank and those kept running even at low flow. The Scala 2 is also supposed to do that and do it even better because it is variable speed. The Scala 2 is quieter while it is running steadily but the cycling when just one faucet is running undoes that benefit. I'm sure there is a fix.
Tom Hitter what is the pump set at. I am a Grundfos rep
Peter Makarichev hello. Are you still a Grundfos rep? I have a question about rebuilding the Scala 2
The internal expansion tank is not large enough to handle hot water expansion of the hot water tank. Most building codes require at least a 2 gallon expansion tank.
each line is 2 Bar . the pump can produce up to 80psi boost from incoming pressure.
the pump has an internal pressure tank.
Hola soy plomero de México instale 2 bombas grounfos Scala 2 se an usado poco ..porque la casa no está habitada todavía..se desenredo Sarón por aproximadamente 2 meses y ahora que las quise arrancar no tienen presión y en el panel de la bomba marca como si la cisterna no tuviera agua . Pero está llena de agua ..que es lo que pasa ahí ..el voltage está bien la válvula de pie (pichancha) está bien la bomba arranca bien .( No está obstruida que pasa..en el manual no vienen posibles fallas y soluciones. Ojalá contesten mi comentario gracias...
Se desenergizo por 2 meses aproximadamente.
@@sergioalberto1982 lee el manual, ahi sale un procedimiento previo para cuando están mucho tiempo sin uso. Verifica que no esté agripado el eje
Hola! Estoy teniendo un problema. La bomba no arranca y no encuentro ese error puntual en el código de luces del manual. Dejo imágenes por si a alguien le pasó y puede ayudarme th-cam.com/video/lJlbuEkWSzU/w-d-xo.html
Gracias!
Paano po pag ayaw umaandar ng motor scalla 2 may ilaw nman ung monitor pag pinidot ko stop ang nalabas anu kaya ang problema
Thanks but I tried adding pressure to its internal bladder. just made it worse
Ever resolve this problem?
Kebocoran gan karena terlalu tinggi tekanan nya
Translate to English
Clean ur valves, and it works 100% again.
Let press a tank pressure 0.7х pressure in you line.
noisy pump how do like over mq
No, very quiet listen again
Holy crap that thing is noisy!!!
Hola! Estoy teniendo un problema. La bomba no arranca y no encuentro ese error puntual en el código de luces del manual. Dejo imágenes por si a alguien le pasó y puede ayudarme th-cam.com/video/lJlbuEkWSzU/w-d-xo.html
Gracias!
Killer of pomp)