Hot take: The new guys keep setting the door zone wrong on the Miprom 2000 units

I've seen three different crews in my building this year mess up the same thing. They set the door zone on the Miprom 2000 controllers to 6 inches, thinking it's a safe default. That's way too wide for the doors in our 1980s office block downtown. It causes the doors to slam open and shut, which wears out the hanger rollers in about six months. I learned the hard way after a callback to fix a jumped track. The manual says 6 inches is for heavy traffic areas, but our building is quiet after 5 PM. I set mine to 3.5 inches and the doors close smooth as butter. How do you all figure out the right door zone for an older install when the book doesn't match the real use?

3 comments

3 Comments

wesleyb2029d ago

You said the manual's 6 inches is for heavy traffic, but I've found that's actually the right starting point for most older buildings too. The slamming issue is usually from worn dampers, not the zone setting itself. I'd check the hydraulic closer before changing the factory default.

charlescraig29d ago

My buddy had this exact fight with a door in his 1920s apartment building. He chased the damper for a week before just turning the zone down to four inches as a last ditch thing. The slam stopped completely. Sometimes the manual is just wrong for the old stuff.

the_troy29d ago

Appreciate the input @wesleyb20, but my experience has been the opposite in a lot of these pre-war spots. Starting at six inches on an old door often just lets it build too much speed before the closer catches it. The factory setting assumes newer hardware. Worn dampers are a common problem for sure, but adjusting the zone back to four inches usually solves the slam without any parts swap. It's a quicker fix to try first.