Connecting Metasys to 2 new Weil Mclain Ultra 750's

[Paladincenter]

Hi,

I am new to BMS and have been tasked with upgrading from 2 Cleaverbrooks oil burners to Weil Mclain Ultra 750's.

The installation is complete and fired the units up this morning.

Now I need to tie them into the BMS.

I am running and old metasys system hyper terminal 5.1 to control the facility.

What I am looking to do is wire the new WM boilers into the existing metasys.

I am also planning to upgrade to an NAE should I do that first?

Any help would be greatly appreciated.

Andrew

www.paladincenter.com

[bob_scheel]

Hi,

I am new to BMS and have been tasked with upgrading from 2 Cleaverbrooks oil burners to Weil Mclain Ultra 750's.

The installation is complete and fired the units up this morning.

Now I need to tie them into the BMS.

I am running and old metasys system hyper terminal 5.1 to control the facility.

What I am looking to do is wire the new WM boilers into the existing metasys.

I am also planning to upgrade to an NAE should I do that first?

Any help would be greatly appreciated.

Andrew

www.paladincenter.com

I am controlling 4 ultras from a metasys UNT1144-0 It has 4 0-10vdc outputs which we use to control the firing rate of each boiler. We also monitor the alarm contact on each boiler so the EMS can know if a boiler is locked out.

The building headend controller is an FX-60 which works well with all of the N2 bus devices we have. There is a default program in the UNT to control the boilers with outdoor air reset, but we wrote some custom control objects in the FX that do a better job of deciding how many boilers to run and which ones have the least hours on them.

[simux]

One of the problems I've seen with running boilers by which one has the least amount of hours is during a download. Then all the hours ar set to zero and system doesn't know what to do. I've always put a command to select boilers if all the hours are the same.