13
Chapter 4. ADJUSTMENT
Pilot turndown test
This test is intended to check that any pilot flame detected by this
device will reliably ignite the main burner, even if the gas pressure and
air pressure have changed to their worst possible conditions.
WARNING
To prevent explosion, carry out the pilot turndown test carefully. If this device
detects a pilot flame that is too small to ignite the main burner, the burner con
-
troller will not be able to recognize flame failure of the main burner, allowing
the outflow of fuel to continue, leading to a serious explosion hazard.
If the pilot turndown test is 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 combustion chamber and flue. If un
-
burned gas and oil are not discharged completely, an explosion may occur.
CAUTION
Installation, wiring, inspection, adjustment, etc., should be carried out by a
trained and experienced technician who has knowledge and technical skills re
-
lated to combustion equipment and flame safeguard control devices.
Only an experienced technician who has knowledge and technical skills related
to combustion equipment and combustion safety should carry out the pilot
turndown test.
For the pilot turndown test procedure, follow the user’s manual of the
burner controller used with this device or the instruction manual pro-
vided by the combustion equipment manufacturer.
Ignition spark response test
WARNING
Make sure that this device does not detect ultraviolet rays other than those of
the burner flame. If it responds to other ultraviolet rays, flame failure in the
burner will not be detected. As a result, fuel will continue to be discharged,
causing a very serious explosion hazard.
zProcedure
(1) Close the manual shutoff valves of the pilot and main burners.
(2) Start the burner so that ignition is attempted. When the igni-
tion spark is generated, check that the flame relay of the burner
controller does not turn ON. (K2 is the flame relay for the
AUR300C/350C, and K6 is the flame relay for the AUR450C.)
To Next Page
Loading...
Need help?
General
