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Chapter 1. Overview
• Starting, running, and stopping of combustion equipment according to a pre-
defined sequence
• Operates each device according to the predefined sequence and timing.
• Safety startup
• Checks the flame detector and the flame detection circuit for flame detection
error each time the start signal is issued.
• Will not start the burner if a failure is detected.
• Design that anticipates part failure modes
• At startup, the self-inspection circuit errs on the side of safety if a failure is
detected.
• Never deviates from the ignition sequence.
• The sequence timing cannot cause a dangerous failure. (The ignition time will
not be lengthened.)
Handling Precautions
• This device has functions that are extremely important for the safe operation
of combustion equipment. Therefore, use the device correctly, according to this
user's manual.
• The device must be installed, wired, maintained, inspected and adjusted by
experienced specialists who have gained knowledge and skills concerning
combustion equipment and combustion safety devices.
Equipment design cautions
The facilities that use the combustion safety equipment must be designed in
compliance with relevant laws, standards, safety guidelines, and the like.
If the system is designed to a foreign specification, please observe the local laws and
standards.
Most important points for ensuring safety
Design the equipment observing the following points to ensure safety.
1. Connect loads directly to the device.
2. Make sure that the start check runs correctly at startup.
3. Do not add a bypass circuit that allows manual operation for any loads.
4. Both the main valve and pilot valve must have redundant shutoff.
Precautions for instrumentation
Since this device does not have a purge function, use an external circuit to
implement one.
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