Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

pressuretroll question

JM_2
JM_2 Member Posts: 108
My new boilers (Burnham Ind. 4) came with the Honeywell L404a Pressuretroll. These units are subtractive and cut out at a low limit of 2PSI. the lowest differential setting is also 2 so it sems you need to set the cut out at aprox.
2 1/2 PSI and the Differential at 2 so the unit will cycle between 1/2 PSI and 2 1/2 PSI. I am more familiar with the PA404A which is addative and has a cut in of as low as 1/2PSI and a low differential of 1. With the PA404A the boiler cycles between a high of 1 1/2 PSI and a low of 1/2PSI. I like the lower pressure better and am going to switch these out. Am i crazy?

Comments

This discussion has been closed.