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Chapter 5. Trial Operation and Adjustment
WARNING
Make sure that the ignition times for the pilot and main burners do not exceed the ignition
times specified by the burner or device manufacturer. Excessive ignition times may cause fuel to
accumulate in the combustion chamber and form an explosive fuel-air mixture, which can result in
a serious explosion hazard.
Terminal 14 (F) retains an electrical charge even after the power is turned off. Do not touch terminal
F even after turning the power off. Failure to do so may result in an electric shock.
Do not operate this device without first completing calibration, testing, and combustion equipment
manufacturer's tests.
If lock-out occurs, make sure to execute a pre-purge before restarting. If unburned gas is not
expelled from the combustion chamber and flue, there is a risk of an explosion during ignition.
CAUTION
Mounting, wiring, maintenance, inspection, calibration, etc. should be carried out by a professional
with technical training in combustion systems and combustion safety devices.
The pilot turn-down test should be carried out by an experienced specialist possessing knowledge
and skills pertaining to combustion equipment and combustion safety.
Preliminary inspection
(1) The temperature and humidity are within the ranges specified for operating
conditions.
(2) There are no errors in wiring and terminal screws are not loose.
(3) The flame detector is installed correctly. (For the installation location,
orientation, and other details, see the user's manual for the flame detector.)
(4) The burner is adjusted correctly.
(5) There are no obstructions, covers, or other items in the combustion air intake or
exhaust outlet.
(6) The power supply voltage and frequency are the same as those shown on the
device.
Inspection procedure
For safe operation of the combustion equipment, inspect the following items
carefully and make appropriate adjustments.
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