Welcome! Here are the website rules, as well as some tips for using this forum.
If you've found help here, check back in to let us know how everything worked out.
It's a great way to thank those who helped you.
pressuretrol as vaporstat backup?
regarding the shoddy controls in the new vaporstats, I see it is wise to add a pressuretrol as a backup. However, if I have an additive pressuretrol, this will not work, correct?
Vaporstat -> switch makes at 6oz (.4psi), and breaks at 8oz(.5 psi).
Additive Pressuretrol -> makes at .5 psi (8oz, lowest possible setpoint) and breaks at additive of 1.5psi which is 2psi, (as a safety)
This will not work. obviously.
So therefore, I need a subtractive pressuretrol:
Vaporstat -> switch makes at 6oz, breaks at 8oz
Subtractive Pressuretrol -> makes at differential (say 1psi) and breaks at setpoint (say 2psi),
This combination will work.
So am I correct in the statement that I need a subtractive pressuretrol to be a safety backup if I am installing a vaporstat?
beautiful Conshohocken PA