BCI-R / BCI2-R Point configuration control w/ 3rd party Automation applications
Summary:
BCI-R / BCI2-R offer point configuration control capabilities for building automation, with integration options for 3rd party automating applications. This allows users to optimize building performance, streamline operations and customize their control strategies to meet their specific requirements
- BCI-R / BCI2-R points need to be configured very specifically for BAS control, especially when used in non-Trane systems.
- You will need to control the "Active Value" and "Out of Service" BACnet properties of various points with one of the following tools:
- Trane BACnet Setup Tool
LCU-BACnet Setup Tool - Setup UC/BCI for Integration into BAS
- BACnet Building Automation System / Front End
- Generic BACnet tool (YABE freeware, for example)
- Note: there are a mandatory set of points required (section "1", below) and some optional application specific settings (section "2")
- Unit must already have proven to operate correctly in ReliaTel Test Mode before beginning
Process
1. Configure necessary/relevant BCI-R / BCI2-R Points for System / BAS Control (required for any BAS control)
-
NOTE: BCI output and value points must be "In Service" (BACnet "Out of Service" property = FALSE), to be used by the Reliatel Controller and controlled by the Automation System
- If a BCI- Output point is "Out of Service" that means that point is using its local sensors/internal logic (and ignoring any commands from the Automation System)
- Do not place any input points out of service (or override their active value), they are required for status from the Reliatel boards and are read only.
1a. MANDATORY Point Settings for System / BAS control
You will be configuring the 1. "Out of Service" and 2. "Present Value" BACnet properties for the following points to get the unit running with a building automation system. The majority of the points below are created "Out of Service"; (aka Out of Service = ACTIVE/TRUE). You will need to make them "In Service" (aka Out of Service = INACTIVE / FALSE).
Note: TD5 operator display must be set to "Read" mode: LCU-BCI-R-TD5-Settings-for-RTU-BAS-Control
Table 1: Mandatory settings
| Point Type / Instance | Point Name | 1. "Out of Service" BACnet Property |
2. Present Value (BACnet Property) |
Notes | |
| 1 | BO/1 | System Control Command | FALSE (aka "In Service") | ACTIVE ("BAS Control") | BO/1 Present Value must be ACTIVE for any level of BAS control, otherwise RTU will ignore all BAS requests and run completely standalone |
| 2 | BO/8 | Supply Fan Configuration Command | FALSE |
- ACTIVE ("Continuous") - INACTIVE ("Cycling / Auto") |
ACTIVE means fan is always on when unit is occupied INACTIVE means fan only on with heating/cooling This configuration is ignored by VAV units, which run the fan whenever the unit is occupied |
| 3 | BO/13 | Filter Timer Reset | FALSE | INACTIVE |
Override to Active to reset filter runtime alarm One-time trigger, will automatically revert to INACTIVE upon override |
| 4 | BO/14 | Diagnostic Reset Command | FALSE | INACTIVE |
Override to Active to reset any resolved latching diagnostics One-time trigger, will automatically revert to INACTIVE upon override |
| 5 | MO/7 | Occupancy Request | FALSE |
1-Occupied 2-Unoccupied |
Fan will always run in "Auto" when unocuppied and use the unoccupied setpoints |
| 6 | MO/8 | Heat Cool Mode Request BAS | FALSE |
1-Auto 5-Cool |
1-Auto - Rooftop makes its own heat/cool decision until commanded otherwise For heating control, see heating section below |
| 7 | BI/1 | System Control Status | FALSE | not writeable |
Upon completion of above steps, if done correctly, BI/1 Present Value = ACTIVE ("BAS Control") This point is not writeable and should always be In Service. Do not proceed with anything until BI/1 is in service and active value is Active / "BAS Control" |
2. Optional System Control Settings and Troubleshooting
Fan & Duct Static Pressure Control
If an RTAM board is present, unit will control to duct static when occupied and BO/8 will be ignored
Otherwise, when in service, BO/8 dictates your occupied fan operation.
For unoccupied operation and more details:
BCI-R/BCI2-R-Reliatel-RTU-Fan-Control
Space and Discharge Air Control
For your BAS to control space temperature, setpoint limits, discharge air temp and duct pressure:
LCU-BCI-R-RTU-Space-Temperature-and-Discharge-Air-Control-from-BAS
Mechanical Cooling
- E-Flex Unit Operation and Troubleshooting
BCI-R E-Flex RTU Operations, Diagnostics & Service Manual (in development)
- Standard Compressor
Heating Control
Frequent source of issues, especially VAV units with staged heat
- VAV Units
LCU VAV BCI-R Controls Staged Heat Issues (Max Heat Morning Warmup, Daytime Warmup)
LCU BCI-R VAV RTU Modulating Heat - Occupied Heat, Supply Air Tempering
- CV & SZVAV Units
- Present Value MO/8 (Heat Cool Mode Request) = 2-Heat (still working on confirming this and any exceptions)
Outdoor Air - Economizing, Demand Control Ventilation (more coming soon)
LCU BCI-R RTU - Outdoor Air Control; Economizer & Ventilation
Dehumidification (in development)
BCI-R / BCI2-R RTU Dehumidification Guide
Diagnostics and other troubleshooting
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.