iii
WARNING
If the pilot turndown test must be carried out repeatedly, completely
shut down all equipment each time the test is finished, and completely
discharge unburned gas or fuel that has accumulated in the ducts and
combustion chamber. Failure to discharge unburned gas or fuel may
result in an explosion.
When the pilot turndown test is complete, turn OFF the power switch to
shut down the power. Restore all test jumpers and limit interlock/regu-
lator settings to their previous states. If operation begins without the
above steps, damage to the equipment, gas leak or explosion may
result.
Do not start regular operation of the equipment without first complet-
ing the trial-run adjustments for this device, as well as the tests speci-
fied by the combustion equipment manufacturer.
To prevent electric shock, turn the power off and discharge terminals F
and G before removing this device from the subbase. Use lead wires to
connect terminals F and G of the flame simulator (FSP300C100) to ter-
minals F and G of this device for 10 seconds or more.
CAUTION
Installation, wiring, inspection, adjustment, etc. should be carried out
by a trained and experienced technician who has knowledge and
technical skills related to combustion equipment and flame safeguard
control devices.
Do not install where exposed to any of the following:
• Certain chemicals or corrosive gases (ammonia, sulfur, chlorine,
ethylene compounds, acid, etc.)
• Splashing water or excessive humidity
• High temperatures
• Prolonged vibration
If timers and auxiliary relays are needed for additional functions, select
ones with high reliability, and be sure to design the circuit correctly.
When installing and wiring, be sure to follow the instructions in this
manual and in the user's manual for the combustion equipment.
Make sure the flame detector does not detect ultraviolet rays other
than those of the burner flame. If the flame detector responds to other
ultraviolet rays, it will report that there is a flame even if the burner
flame goes out. As a result, fuel will continue to be discharged,
causing a very serious explosion hazard.
