Honeywell R7140G Installation Instructions Manual page 32

SAFETY SHUTDOWN TESTS
(ALL INSTALLATIONS)
Perform these tests at the end of Checkout, after all other tests
are completed. If used, the external alarm should turn on. Press
the RESET pushbutton on the relay module to restart the system.
1. Opening a Preignition Interlock during the STANDBY or
PREPURGE period (R7140L - Lockout; R7140G and M -
Standby Hold 40 seconds, then Lockout).
a. Safety shutdown occurs.
2. Opening a Lockout Interlock during PREPURGE, PILOT
IGN, MAIN IGN or RUN period (R7140L Only).
a. R7140G and R7140M go to Standby.
b. Safety shutdown occurs.
3. Detection of flame 40 seconds after entry to STANDBY
from RUN. Detection of flame from ten seconds up to 30
seconds into PREPURGE time.
a. Simulate a flame to cause the flame signal voltage
level to be at least 1.25 Vdc for 40 seconds after entry
to STANDBY from RUN and also simulate a flame
signal for 10 seconds to 30 seconds for PREPURGE.
b. Flame LED is on.
c. Safety shutdown occurs after 40 seconds.
4. Failure to ignite pilot.
a. Close pilot and main fuel manual shutoff valve(s).
b. Cycle burner on.
c. Automatic pilot valve(s) should be energized but the
pilot cannot ignite.
d. Safety shutdown occurs.
5. Failure to ignite main (only interrupted pilot application).
a. Open the manual pilot valve(s); leave the main fuel
manual shutoff valve(s) closed.
b. Depress the reset button.
c. Start the system.
d. The pilot should ignite and the flame signal should be
at least 1.25 Vdc but the main burner cannot light.
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e. The flame signal should drop below 1.25 Vdc within
the FFRT of the amplifier and the relay module after
the interrupted pilot goes out.
f. Safety shutdown occurs.
6. Loss of flame during RUN.
a. Open the main fuel manual shutoff valve(s) and open
manual pilot shutoff valve(s).
b. Depress the reset button.
c. Start the system. Start-up should be normal and the
main burner should light normally.
d. After the sequence is in the normal RUN period for at
least ten seconds with the main burner firing, close
the manual main fuel shutoff valve(s) to extinguish the
main burner flame. (On intermittent pilot applications,
also, close the pilot manual shutoff valve.)
e. The flame signal should drop below 1.25 Vdc within
the FFRT of the amplifier and the relay module after
the main flame and/or pilot goes out.
f. R7140L goes to Safety Shutdown; R7140G, M recycle
after 15-second postpurge.
g. Safety shutdown occurs. (R7140L only.)
7. Opening a Preignition Interlock after the first five seconds
of POSTPURGE.
a. Open the main fuel manual shutoff valve(s) and open
manual pilot shutoff valve(s).
b. Depress the reset button.
c. *Preignition ILK* fault is displayed on the Keyboard
Display Module. Fault code 33 is displayed to denote
the fault.
d. Safety shutdown occurs.
IMPORTANT
1. If the relay module fails to shut down on any of these
tests, take corrective action; refer to Troubleshooting
and the relay module diagnostics and return to the
beginning of all Checkout tests.
2. When all Checkout tests are completed, reset all
switches to the original status.