Burner Control Unit BCU 460
The BCU (burner control unit) 460 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 its fully electronic design, it reacts quickly to various process requirements and is therefore suitable for frequent cycling operation.
It can be used for directly ignited industrial burners of unlimited capacity. The burners may 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 BCSoft software 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 use with directly ignited burners of unlimited capacity in intermittent or continuous operation pursuant to EN 746-2
- Flame control by UV, ionization, or another option for using the furnace chamber temperature
- Display for the program status, device parameters, and flame signal
- Manual mode for burner adjustment and for diagnostic purposes
- Programming and diagnostic software BCSoft simplfies 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
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Documentation
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Ordering Information
| Model |
1st trial for Ignition Period |
Air Valve Control |
PROFIBUS Connection |
Additional Signal Distribution |
Price
(US List) |
Order Now |
| BCU 460T-5/2R3 |
5 sec. |
No |
No |
No |
$1137 |
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| BCU 460T-5/2LR3 |
5 sec. |
Yes |
No |
No |
$1242 |
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| BCU 460T-10/2LR3 |
10 sec. |
Yes |
No |
No |
$1242 |
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| For all other configurations Contact Combustion 911 |
Accessories
| Model |
Description |
Price
(US List) |
Order Now |
| BC SOFT |
Optical Adapter for BC Soft with USB interface, includes CD-ROM |
$324 |
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| Ignition Cable |
Silicon Cable High Voltage 7mm (priced per foot) |
$3 |
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Applications
Click on images for close-up view.
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Modulating-controlled burner
Control: ON/OFF/Continuous
The external control system moves the butterfly valve for air to ignition position. The burner starts at low-fire rate, and a regulator controls the burner capacity via the butterfly valve for air after the operating state has been signalled. |
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Two-stage-controlled burner ("L" products)
Control: ON/OFF or ON/HIGH/LOW/OFF
The BCU supports the cooling and purging processes. The burner starts at low-fire rate. When the operating status is reached the BCU advises the control unit. The PLC can now pulse the air valve in order to control the burner capacity. |
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Single-stage-controlled radiant tube burner ("L" products)
Control: ON/OFF
The BCU supports the cooling and purging processes. |
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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). |
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| 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) |
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| 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 |
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| 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) |
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| 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. |
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