Making assumptions

I have never dealt with Europlex but made erroneous assumptions regarding the loops.

New business taking over an old Circuit City building.

Nearly a hundred protection points through 4 splice points each with 3 expanders in it.

Using a V-128FBPN to replace the Europlex and the new folks only want doors and a few motions - 21 points in total including poc's to Simplex Panel.

Got all the wires ID'd and found each splice point had 3 6-conductors going to head end which meant I could run each point right to the head end and do everything with two expanders instead of four - Oh sure, I did have one splice box that now has NO spares... but hopefully they will not need any more points from that area.

Couldn't find the eolr's. Finally I had a thought and did what I should have done from the get go - I metered the door contacts.

While normal (magnet applied) I got 500 ohm reading. Tripped (magnet removed) I got 1.5 Kohms.

Now just what the heck am I to do with that? Sure, great for supervision - shitty for changing out the panel.

Nothing for it but to order 7 door contacts and 4 overhead door contacts.

For even more fun and excitement, the Fire Marshall did his walk through and revoked their temp occupancy 'cause they needed more emergency exits

- guess there were plenty for a Circuit City but not for a fireworks store.

But I'm ready for 'em, wires run and all set to install the contacts when the doors are done. There were some construction type fellas there Friday making all sorts of noise as they made holes in the block.

Should be able to wrap it up Monday...

Reply to
JoeRaisin
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Add 700 ohms at the contacts a be done with it.

Les

Reply to
ABLE1

I have hit that with thew old blue westec boxes just changed out the contacts you can do the resistor thing but it screws with any one else who does not know that trick

Reply to
NickMark

you can do the resistor thing but it screws with any one else who does not know that trick

If you feel guilty about it .... you could always leave a note in the panel.

"Dear next alarm guy. Somewhere on the burg loop there are 700 ohm resistors added to the circuit to make up the difference in total loop resistance. Good luck. Signed: Last alarm guy. Consulting Fee: $95.00 per hour. "

Reply to
Jim

added to the circuit to make up the difference in total loop resistance. Good luck. Signed: Last alarm guy. Consulting Fee: $95.00 per hour. "

True story, an ADT fire alarm panel (SK 5208) I opened the can and noticed resistors in parallel to the detection zones. At first I thought, oh man... they didn't supervise the circuit. Then I noticed on the door written with a Sharpie and arrows drawn to the terminals: "These are NOT resistors, they are *equalizers*!" OMG.

I just locked the can back up. I was there re-doing & taking over ADT's burg. system, that didn't work at all.

Reply to
G. Morgan

Unless I'm misreading the original post, if the 700 ohm is placed in series with the contact that will result in 1.2K with the door closed and 2.2K with the door open.

I think the V-128FB will see the zone as normal with the door open, I'm not sure how the panel will interpret the circuit at 1.2K with the door closed, probably as a short and will show an open zone or possible even still show as normal depending on the tolerance of the panel.

Doug

Reply to
doug

Ran into similar situations when taking over old ADT Focus systems.

Reply to
Bob La Londe

Most of the doors were landed on one of the expanders (4208U) so we are looking for 10K. So 9.5 in series could have worked, 1.5 is low enough to make a reliable point.

But it's over and done. We got 10 hrs added to the job for replacing 11 contacts (4 oh doors, 7 regular).

Reply to
JoeRaisin

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