Hi,
I had a new boiler installed at the beginning of 2018 and the plumber installed a Dab Evosta circulator. A few nights ago it started making a high pitch squeak which can be heard throughout the house. I therefore looked it up and found the instruction manual.
I tried bleeding the pump but no air came out, only water.
I did, however, notice that the pump was set to “Constant Differential Pressure” which, according to the manual was for underfloor heating systems. I have radiators.
When I changed the setting on the pump to “Proportional Differential Pressure” which appears to be for radiators the squeaking stopped!
My concern is why the plumber initially set it up as Constant as opposed to Proportional? Have I changed anything significant? Is it going to have an adverse affect? Would the initial setting have had an adverse affect over the past year and a quarter?
I have attached some photos.
Thank you in advance.
Tom
I had a new boiler installed at the beginning of 2018 and the plumber installed a Dab Evosta circulator. A few nights ago it started making a high pitch squeak which can be heard throughout the house. I therefore looked it up and found the instruction manual.
I tried bleeding the pump but no air came out, only water.
I did, however, notice that the pump was set to “Constant Differential Pressure” which, according to the manual was for underfloor heating systems. I have radiators.
When I changed the setting on the pump to “Proportional Differential Pressure” which appears to be for radiators the squeaking stopped!
My concern is why the plumber initially set it up as Constant as opposed to Proportional? Have I changed anything significant? Is it going to have an adverse affect? Would the initial setting have had an adverse affect over the past year and a quarter?
I have attached some photos.
Thank you in advance.
Tom