For years I have told people that electronic locks are not really made for multipoint lock door preps. Only recently have the manufacturers started offering extremely expensive replacements for their multipoint locks that work with keypads and they are thousands of dollars. There are other silly setups like a Burg Wachter euro cylinder that used some kind of radio and a remote keypad I remember installing five years ago. There have also been many dozens who have asked me to replace their multipoint lock with a keypad they bought at the hardware store but only one of them had me go through with installation after I showed him the problems that would result.
There is another type of electronic lock though, the August deadbolt. It isn’t actually a deadbolt, more of a replacement thumbturn that can be controlled via smartphone. They can be installed to work with American style multipoint locks that have a lazy action tailpiece. It is kind of a hack and you still have to lift up on the handle before locking the august deadbolt but it does work without keys.
The first step is to acknowledge that you will probably void the multipoint lock warranty by bolting an electronic controller onto it. Maybe you will void the August deadbolt’s warranty too although I can’t see how, none of its parts are altered. The following information is actually only written for the entertainment of a very small population of door hardware nerds and is not actually meant to be a guide, if you do anything described herein it is your full responsibility and I recommend putting on a hazmat suit and two condoms and maybe also a covid mask.
The second step is to replace the lazy action tailpiece on the lock cylinder with one that is long enough to go through the door and extend past the interior trim plate. The lock I worked on today had a tailpiece that wasn’t long enough. The first tailpiece from an Ilco key in knob cylinder was longer but not long enough. The GMS kik long lazy action tailpiece was perfect.
Third is to remove the thumbturn from the interior trim plate (because we are planning to use the August deadbolt thumbturn in its place). In most cases these are held on by either a pressed on washer or a snap ring. You can reinstall this later if you decide the electronic lock is a silly idea.
Fourth step is to reinstall the multipoint trim, put the August mounting plate on the interior trim and line up the tailpiece centered in the mounting plate hole. Now mark the through bolt holes by marking the center of these holes but on the multipoint trim. Now drill and tap the holes. I recommend #8/32tpi screws because the heads are flush after install with the August mounting plate.
I found that the #8 machine screw fit in the August mounting plate best.
Now you just screw the August mounting plate on and carry on with the install. It worked great for me. The biggest problem most likely will be trying to explain to people how to lock the door. Using multipoint locks is hard enough for people without the addition of an electronic lock. For many people just the mention of an electronic lock causes their forehead to crease and their eyes to narrow.
I will say though that for regular users of such a door this will be a huge convenience.
