Pro Tip!
Posted By Randy on March 25, 2020
This morning I was consulted by an electrical contractor in the matter of Dorma 1800 Series door closers — devices designed to hold a fire door open, and trigger positive closure when smoke is detected.
As we were reviewing the installation manual together on the phone, this cropped up, and it was lucky he had me alongside to guide him when it did.
With apologies to Paul Harrell, don’t try this at home folks, I’m whatcha call a professional.
Click to enlarge.
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