No. Don't "fully open" it. It should be set to operate at the highest pressure difference that allows it to achieve its intended purpose.
If you are determined to play around open it by small amounts, say quarter turns until it reduces the 1840 noise. But, if you open it enough to completely eliminate the 1840 noise you'll probably have gone too far and have replaced one problem with another.
Fully opening it was simply to establish if it was/is plumbed in properly.