Azbil AUR890 Series, Руководство пользователя

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Chapter 1. Overview
AUR890 burner controllers were developed as an upgrade for the RA890 burner controller, and are designed for
batch operation of combustion equipment (at least one start and stop in a 24-hour period). This device is used in
combination with an AUD100 series Advanced Ultraviolet Flame Detector or a flame rod.
For combustion equipment that operates continually for 24 hours, use a burner controller designed for continuous
operation instead of this device.
This device is structured for external instrumentation of the pre-purge function. It automatically ignites the
pilot and main burners and monitors the flame. In addition, when flame failure occurs, this device locks out the
combustion equipment.
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Features
• 7-segment display for sequence codes and alarm codes.
• LED indicators show whether there is a flame signal and whether lock-out is
present.
• The product is designed so that it cannot be restarted in the case of lock-out due
to ignition failure, false flame or other causes, unless it is reset manually.
• If there is a false flame signal during startup, the controller will be locked out.
• Perform fault diagnosis for the internal control relay circuit.
• A base unit, Q890A100, is available for use when replacing the RA890.
Attach the cables that were connected to the Q270A1024 sub-base of the RA890
to the new base unit. The terminals have the same numbers to facilitate upgrading
from RA890 to AUR890.
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System configuration
The facilities that use the combustion safety device must be designed taking into
careful consideration the following safety guidelines and the like.
If the system is designed to a foreign specification, refer to laws and standards in the
relevant country.
„
Ensuring safety
This device plays an important role in the safety of burner operation and flame
monitoring, and is designed to ensure safety.
(1) Combustion monitoring and safety shutoff
• Immediately executes a safety shutoff of the fuel when the flame sensor detects
a flame failure of the burner.
• Stops each device in a predefined sequence in the event of an ignition failure,
flame failure, or cessation of combustion.
Air pressure
switch
Gas pressure
switch
Gas pressure
switch
Ignition
transformer
Air
Fuel
MV MV
PV PV
FD
Exhaust
gas
T/C T/C
L
L
H
Controller
High limit controller
Combustion
room
Combustion
equipment
AUR890
PS
PS
IG
PS