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Chapter 5.
Trial Operation and Adjustment
WARNING
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.
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 operate this device without first completing adjustment, testing, and the combustion
equipment manufacturer’s tests.
If lockout occurs, be sure to do a prepurge before restarting the system. If the combustion chamber
and gas flue are not ventilated to remove any unburned gas, the ignition process may cause an
explosion.
CAUTION
Installation, wiring, maintenance, inspection, and adjustment must be carried out by a professional
with technical training in combustion equipment and combustion safety equipment.
The pilot turn-down test should be carried out only by an experienced specialist possessing
knowledge and skills pertaining to combustion equipment and combustion safety.
Preliminary inspection
• The temperature and humidity are within the ranges specified for operating
conditions.
• There are no errors in wiring and terminal screws are not loose.
• The flame detector is installed correctly. (For the installation location, orientation,
and other details, see the user's manual for the flame detector.)
• The burner is adjusted correctly.
• There are no obstructions, covers, or other items in the combustion air intake or
exhaust outlet.
• 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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