Burner Control Unit BCU 465

The BCU (burner control unit) 465 enhances the features of BCU 460 by adding Proof of Closure switch monitoring and purge timing. It is for directly ignited burners of unlimited capacity (air valve control optional). The unit ignites and monitors gas burners for intermittent or continuous operation. As a result of their fully electronic design they react quickly to various process requirements and are therefore suitable for frequent cycling operation.

It can be used for directly ignited industrial burners of unlimited capacity. The burners can be modulating or step-by-step controlled. The BCU is installed near the burner to be monitored.

On industrial furnaces, the BCU relieves the load on the furnace control by taking over tasks that only relate to the burner, for example it ensures that the burner always ignites in a safe condition after it has been restarted.

The optional air valve control on the BCU..L assists the furnace control for cooling, purging, and capacity control tasks.

The program status, the unit parameters, and the level of the flame signal can be read directly from the unit. The burner can be controlled manually for commissioning and diagnostic purposes. If the local requirements on the burner control unit change, the software BCSoft can be adjusted to the unit parameters of the application by using the optical interface.

Users can see input and output signals and the error history.

Features

• Automatic burner control unit, ignition transformer, indicators, and operating controls are in a space-saving metal housing that replaces the local burner control cabinet
• For directly ignited burners of unlimited capacity in intermittent or continuous operation pursuant to EN 746-2
• Monitors proof-of-closure switch (POC) (optional)
• Provides purge timing prior to burner ignition (optional)
• 1400° bypass (optional)
• Flame control by UV, ionization, or another option using the furnace chamber temperature
• Display of the program status, device parameters, and flame signal
• Manual mode for burner adjustment and for diagnostic purposes
• Programming and diagnostic software BCSoft simplifies logistics management
• Spacious connection chamber with plug-in terminal blocks and plug-in cable sockets for quick installation and servicing
• Air valve control in BCU..L relieves the furnace control
• Optional PROFIBUS-DP interface
• EC type-tested and certified
• FM approved

	Documentation Manufacturer's Product Brochure Manufacturer's Operating Instructions Manufacturer's Technical Sheet
	Ordering Information Model Digital Input to interrupt monitoring for flame rod OCS control and Circuit Board for signal distibution Price (US List) Order Now BCU 465T-5/2LR3 No No $1209 BCU 465T-5/2LR3D3 Yes No $1323 BCU 465T-5/2LR3D3OC Yes Yes $1364 BCU 465T-5/2LR3OC No Yes $1269 For all other configurations Contact Combustion 911 Accessories Model Description Price (US List) Order Now BCU OPTO Opto-adapter (serial port connection) includes BCSoft CD-ROM $299 Ignition Cable Silicon Cable High Voltage 7mm (priced per foot) $3
	Applications Click on images for close-up view. Single-stage-controlled burner Control: ON/OFF The gas/air mixture is adjusted to the requirements of the applications using the differing parameters of air supply and air post ventilation. The pressure switch monitors the air flow in the air supply line or in the flue gas branch. Single-stage-controlled burner with pneumatic group Control: ON/OFF The BCU supports the cooling and purging processes. The variable air/gas ratio control compensates for gas/air pressure fluctuations. Optional: The pressure switch monitors the air flow during pre-purge and operation. The gas/air mixture is adjusted to the requirements of the applications using the differing parameters of air supply and air post ventilation.
	Specifications Electrical Mains voltage: 115 V AC, -15/+10 %, 50/60 Hz Inherent consumption: approx. 9 VA plus inherent consumption of the ignition transformer. Voltage to inputs and valves: mains voltage Signal and control line: max. 2.5 mm2 Cable for burner earth/PE wire: 4 mm2 Input voltage signal inputs: Signal "1": 80 - 126,5 Signal "2": 0 - 20 Input current signal inputs: Signal "1" typ. 2 mA Output current: Max. 2 A per output, but total current for valves and ignition transformer: max. 2.5 A. Fail-safe inputs and outputs: All the inputs and outputs marked "FS" may be used for safety tasks. Flame control: Sensor voltage: approx. 230 VAC Sensor current: > 1 µA Length of sensor cable: max. 5 m Fuse in unit: F1: 3.15 A, slow-acting, H pursuant to IEC 127-2/5 F3: 3.15 A, slow-acting, H pursuant to IEC 127-2/5 (on BCU..C).     Ignition Transformer Type: TZI 7.5-12/100R Input: VAC: 115 Hz: 50 (60) A: 1.2 (0.9) Output: V: 7500 mA: 12 (9)     Operation and fault signaling contacts Signalling contact (not floating): max. 2 A, 264 V, not internally fused Max. number of operating cycles: 1,000,000 Mains switch: 1000 Reset/Information button: 1000     Operation and Environment Length of Burner cables: max. 5 m. (16.4 ft.) Ambient temperature: -20°C (-4°F) to +60°C (+140°F) (no condensation permitted)     Construction Materials Enclosure: IP 54 pursuant to IEC 529 Housing: Die-cast aluminium with plug-in terminal blocks and plug-in M20 cable glands. Weight: Approx. 5 kg (11 lbs.) depending on version.