Honeywell Ademco Vista-250BP Polling Loop

[metenece]

Hello,
 
New here to this site. I have a commercial customer who wants us to take over their System. They currently have a polling loop that goes around the building and covers several roll up and single doors. Originally there was one tenant in this building but now there will be two tenants and they want us to separate the loop, add a new panel and essentially create two separate systems.
 
Since I have never worked on this system I was wandering if I could get some input from someone who has.
 
Also if there is anyone in the inland empire area of southern California who would be interested in partnering on this project please respond. 

 

[Del91574]

Depends on the topology and/or distances involved.
 
If the main tenant is the landlord or similar, then I'd say partition the panel and then isolate the RPM bus via isolators or similar so a short on the tenant side does not affect their system.

Other than that, the other option is split the present system (after grabbing a copy of the DB and assuming that they didn't use dipswitch poll addresses that exceed the capabilities of a smaller panel, or they used ESN poll addresses or individual RPM's).
 
You can split the system into 2 separate using new panels, like V128's and go that route or get another 250, but you need to know the loop topology and where to break it/refeed the section etc.

 

[metenece]

I suggested partitioning the panel but since the main tenant is not the landlord they do not like that idea. 
 
We were thinking of splitting it into two separate panels leaving the existing panel in place and adding a new 250
 
Since we did not install the system we are not sure of the loop topology but i am assuming it goes around the entire building (1200 feet length and 600 feet width) it covers most if not all the exterior roll up doors and single doors.
 
Do you know how to work/program these panels?
 
What would be the next steps for something like this?

 

[Del91574]

Next step would be to investigate the topology. That would determine if the plan is possible or if partial rewiring is needed. Also easy enough to see where to split the bus and refeed. You can never assume with a multiplex loop as people do silly things. Spend some time with a meter and toner and start where the proposed split and divorce of the bus would occur and see if it's possible. With the panel powered up you should be able to disconnect one side of the bus and see what devices go missing.
 
The panel vintage would determine the connection method, but the best option would be get a download of the panel and see what you have there and then determine the next step.

There's no need to put in a second 250 if a 120 would suffice, but that's not discussing if there's any fire or other variable that would necessitate one.
 
I've worked on the entire Vista line.

 

[metenece]

thanks for your input. Would you or someone you know be interested in providing technical support for this project?

 

[Del91574]

Timing is key. The hard part is I'm in the middle of a major project and upgrades, so that's the kicker for me.