Type: Posts; User: jasoninsandiego
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04-10-2007, 01:20 AM
Johnson Controls wants to upgrade our facility from NCM350 to NAE. 5 out of the 20 NCMs perform critical smoke control processes,. These processes have been tested thoroughly. I am concerned for...
05-10-2006, 10:35 PM
Is there a way to calcuate the flow rate in gpm or feet per minute through a chiller evap. tube by usings diff. pressure?
12-17-2005, 08:23 PM
I converted from HVAC mechanic / Pipefitter to BAS controls about 12 years ago. I am glad that I made the move. The job is a little cleaner, not so hard on the back, not as much OT in the summer...
I found the information that I was looking for. Siemens upgraded the old Datamate program and consolidated it with the old versions of Building Control Software (BCS), Controller Interface Software...
The Minimum on / off times are time delays. The minimum on time is the shortest time the BO will be on and the minimum off time is the shortest time the BO will be off. I was wrong by calling them...
As for the compressors not responding to a setpoint change, it could be a number of things.
1. Slow PI Loop
2. Large Bias
3. Setpoint is not going above or below the actual setpoints.
If I remember correctly. You can not override the BO for the compressor command in an AC Unit or Roof Top unit application. I believe there is a point under the parameters menu called cooling demand...
04-06-2005, 05:10 PM
We just ripped out a first generation Metasys control system. We ripped out
3 5-Slot NCU Panels
2 2-Slot NCU Panels
A Couple of DCMs, XRE, and XRL, modules
A whole bunch of power supplies and...
We are going to install a Tridium workstation and integrate with the Siemens equipment. Eventually, the customer wants to phase out the Siemens products as failures or upgrades are needed. We need...
03-30-2005, 12:34 PM
The best bet is to use the N30 BACnet/IP. It is easy enough and you can find tons of BACnet/IP APIs for Visual Studio .NET or 6.0
A Company called Field Server makes a nice interface that converts N2 to just about any protocol that Triduim can read, LON, BACnet/IP, etc. http://www.fieldserver.com
We have a very small building with 1 Siemens Apogee MBC and a few TEC BLN controllers installed. We would like to know if a program exist to backup the MBC. I know Insight will do the job, but we do...
03-04-2005, 04:53 AM
If the site has a M3 or M5 workstation, you can use a OPC client to get data. The N30 runs "BACnet" between N30s and M-Series workstations. How pure that BACnet is, I am not sure.
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