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Safety Precautions
WARNING
Use this device with combustion equipment that starts and stops at least once in a 24-hour period.
This device cannot be used for equipment with combustion continuing for 24 hours or longer.
This device does not have a prepurge function. Use this device as part of a system whose design
gives careful consideration to the prepurge timer and ignition sequence timing, following
established safety guidelines.
To connect this device to the power supply, connect the high potential side (L1) to terminal 2
*1
and
the low potential side (L2(N)) to terminal 3.
*2
Use a circuit to which power is constantly supplied
after the circuit breaker (or power switch) is turned on.
*1. Terminal 1 if the replacement base unit (Q890A100) is used
*2. Terminal 2 if the replacement base unit (Q890A100) is used
Never short-circuit the start contact in order to start and stop this device by switching the power
on and off. This is very important for reliable activation of the self-check circuit at device startup.
Failure to observe this warning could lead to an explosion.
Connect loads (ignition transformer, solenoid valve, etc.) directly to the output terminals of this
device. Otherwise, combustion safety cannot be ensured.
The ignition time for the pilot and main burners should not exceed the time defined by the burner
or device manufacturer.
If it does, fuel will accumulate in the combustion chamber and form an explosive mixture, resulting
in a very dangerous situation in which an explosion could occur.
Before mounting, removing, or wiring, be sure to turn off the power to this device and all
connected devices. Failure to do so may result in an electric shock.
If the system is locked out, do not reset it until the cause of the problem has been eliminated.
If a lockout occurs, do not reset this device repeatedly. If this device is misused, a serious
combustion equipment accident may occur.
Do not connect the solenoid valve to the high potential side (L1). If it is connected to L1 and a
ground fault occurs, current can leak to the solenoid valve and open it, allowing fuel to flow out,
regardless of the status of the burner controller.
This device is equipped with functions that are extremely important for the safe operation of
combustion equipment. Be sure to follow the instructions stated in this user’s manual.
Check the model number carefully and check that the sequence timing is as specified by the
combustion equipment manufacturer.
Installing the wrong model can create a dangerous situation resulting in an explosion.
Do not touch terminal 14 (F) after turning the power off. An electric charge may remain in the
terminal 14 (F) and may cause an electric shock.
Do not start regular operation of equipment without first completing the trail-run adjustments for
this device, as well as the tests specified by the equipment manufacturer.
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