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Installation and Operation Guide
BAC-7302 and BAC-7302C
Advanced Applications Controller
Section 1
Specifications ........................................................................................................................ 3
Accessories ............................................................................................................................ 6
Safety considerations .......................................................................................................... 7
Section 2
Mounting .............................................................................................................................. 9
Connecting inputs ............................................................................................................... 9
Connecting outputs ........................................................................................................... 10
Connecting to a NetSensor ............................................................................................... 11
Connecting to an MS/TP network .................................................................................. 11
Connecting power ............................................................................................................. 13
Programming ..................................................................................................................... 14
Section 3
Operation ............................................................................................................................ 15
Controls and Indicators .................................................................................................... 15
Restoring factory settings ................................................................................................. 18
Revision E
905-019-53E
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Summary of Contents for KMC Controls BAC-7302
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Page 1: Table Of Contents
Installation and Operation Guide BAC-7302 and BAC-7302C Advanced Applications Controller Section 1 About the BAC-7302 Specifications ........................3 Accessories ..........................6 Safety considerations ......................7 Section 2 Installing the controller Mounting ..........................9 Connecting inputs ....................... 9 Connecting outputs ......................10 Connecting to a NetSensor .................... - Page 2 KMC Controls, Inc. makes no representations or warranties with respect to this manual. In no event shall KMC Controls, Inc. be liable for any damages, direct or incidental, arising out of or related to the use of this manual.
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Page 3: About The Bac-7302 Specifications
BAC-7302 controller. It also introduces safety information. Review this material before installing or operating the controller. The BAC-7302 is a native BACnet, fully programmable controller designed for roof top units. Use this versatile controller in stand-alone environments or networked to other BACnet devices. - Page 4 About the BAC-7302 KMC Controls Specifications Outputs, Single-stage triac Key features Optically isolated triac output. Programmable a binary object. Connector Removable screw terminal block Wire size 14-22 AWG Output range Maximum switching 30 volts AC at 1 ampere Outputs, Dual-stage triac Key features Optically isolated triac output.
- Page 5 BAC-7302 RTU Controller About the BAC-7302 Specifications Application programs KMC Controls supplies the BAC-7302 with programming sequences for roof top units: ◆ Roof top operation based on occupancy, night setback, proportional hot and chilled water valve control. ◆ Economizer operation.
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Page 6: Accessories
About the BAC-7302 KMC Controls Accessories Dimensions Table 1-1 BAC-7302 Dimensions 4.36 in. 6.79 in. 1.42 in. 4.00 in. 6.00 in. 111 mm 172 mm 36 mm 102 mm 152 mm Accessories Power transformer XEE-6111-40 Single-hub 120 volt transformer XEE-6112-40... -
Page 7: Safety Considerations
Safety considerations Safety considerations KMC Controls assumes the responsibility for providing you a safe product and safety guidelines during its use. Safety means protection to all individuals who install, operate, and service the equipment as well as protection of the equipment itself. - Page 8 About the BAC-7302 KMC Controls Safety considerations Revision E...
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Page 9: Installing The Controller
Connecting inputs The BAC-7302 controller has four universal inputs. Each input can be configured to receive either analog or digital signals. By using the optional pull-up resistors, either passive or active devices may be connected to the inputs. -
Page 10: Connecting Outputs
Off position. Connecting outputs The BAC-7302 includes one single-stage triac, two-three stage triacs and one universal output. All triacs are rated for 24 volt, 1 ampere loads, switch on zero crossing and are optically isolated. -
Page 11: Connecting To A Netsensor
NetSensor The Network RJ–12 connector provides a connection port to a NetSensor model KMD–1161 or KMD–1181. Link the controller to a NetSensor with a KMC Controls approved cable up to 75 feet long. See the installation guide supplied with the NetSensor for complete NetSensor installation instructions. - Page 12 Illustration 2-4 MS/TP network wiring Note The BAC-7302 EIA–485 terminals are labeled -A, +B and S. The S terminal is provided as a connecting point for the shield. The terminal is not connected to the ground of the controller. When connecting to controllers from other manufacturers, verify the shield connection is not connected to ground.
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Page 13: Connecting Power
The controllers require an external, 24 volt, AC power source. Use the following guidelines when choosing and wiring transformers. Use a KMC Controls Class–2 transformer of the appropriate size to supply ◆ power to the controllers. KMC Controls recommends powering only one controller from each transformer. -
Page 14: Programming
Programming Programming Network configuration For more information on installing, configuring, and programming HVAC system controllers, see the following documents available on the KMC Controls web site: ◆ BACstage User’s Guide to Installation and Getting Started (902-019-62) ◆ BAC-5000 Reference Guide (902019-63) ◆... -
Page 15: Operating The Controller
BAC-7302 RTU Controller SECTION 3 Operating the controller This section provides a brief overview of the BAC-7302 and the BAC-7302C Direct Digital Controllers. Review this material before you attempt to install the controller. Operation Once configured, programmed and powered up, the controller requires very little user intervention. - Page 16 Operating the controller KMC Controls Controls and Indicators Ready LED The green Ready LED indicates the state of the controller. This includes automatic addressing functions that are fully described in the guide MS/TP Addressing For BACnet Controllers. Power up During controller initialization, the Ready LED is continuously illuminated for 5 to 20 seconds.
- Page 17 BAC-7302 RTU Controller Operating the controller Controls and Indicators Nomad patterns There are three Com LED patterns that indicate that the controller is an automatic addressing nomad controller that is receiving valid MS/TP traffic. Table 3-2 Automatic addressing nomad patterns...
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Page 18: Restoring Factory Settings
Operating the controller KMC Controls Restoring factory settings Restoring factory settings If the controller appears to be operating incorrectly, or is not responding to commands, you may need to reset or restart the controller. To perform a reset or restart, remove the cover to expose the red restart push-button and then use one of the following procedures. - Page 19 BAC-7302 RTU Controller Operating the controller Restoring factory settings Caution Returning object values to their relinquished defaults during a cold start may abruptly turn connected equipment on or off. To prevent equipment damage, turn connected equipment off or temporarily remove the output terminal blocks from the controller before performing a warm start.
- Page 20 Operating the controller KMC Controls Restoring factory settings Revision E...
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