Honeywell 7800 Series Manual page 41

Check the pilot alone, the main burner flame alone, and both
together (unless monitoring only the pilot flame when using
an intermittent pilot, or only the main burner flame when
using DSI). Check the signal at both High and Low Firing
Rate positions and while modulating, if applicable.
Check the FFRT of the Flame Amplifier. Lower the set
point of the operating controller and observe the time it takes
for the burner flame to go out. This should be within 0.8 or 3
seconds maximum depending on the amplifier selected.
If the flame signal is too low or unsteady, check the flame
detector temperature. Relocate the detector if the temperature
is too high. If necessary, realign the sighting to obtain the
proper signal and response time. If the response time is still
too slow, replace the Plug-in Flame Signal Amplifier. If the
detector is relocated or resighted, or the amplifier is replaced,
repeat all required Checkout tests.
SAFETY SHUTDOWN TESTS (All Installations)
Perform these tests at the end of Checkout, after all
other tests have been completed. If used, the external
alarm should turn on. Press the RM7800 reset pushbutton
to restart the system.
1. Opening a Preignition Interlock during STANDBY or
PREPURGE period.
a.*Preignition ILK* fault will be displayed on the
VFD. Fault code 10 or 33 will be displayed to
denote the fault.
b. Safety shutdown will occur.
2. Opening a Lockout Interlock during PREPURGE,
PILOT IGN, MAIN IGN or RUN period.
a. *Lockout ILK* fault will be displayed on the VFD.
Fault code 11 or 12 or 21 or 29 will be displayed to
denote the fault.
b. Safety shutdown will occur.
3. Detection of flame 40 seconds after entry to
STANDBY, fault code 9. Detection of flame ten seconds
into Drive to Purge Rate for RM7800E,L or 30 seconds
for RM7800G,M or during measured 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 and also simulate a flame
signal for 10 seconds for RM7800E,L and 30
seconds for RM7800G,M during PREPURGE.
b.*Flame Detected* fault will be displayed on the
VFD. Fault code 9 or 15 or 18 will be displayed to
denote the fault.
c. Safety shutdown will occur.
4. Failure to ignite pilot.
a. Close pilot and main fuel manual shutoff valve(s).
b. Depress the reset button.
c. Start the system.
d. The automatic pilot valve(s) should be energized
but the pilot cannot ignite.
e. *Pilot Flame Fail* fault will be displayed on the
VFD. Fault code 28 will be displayed four or ten
seconds (depending on the jumper configuration
selection for PFEP) after the pilot valve(s) is
energized to denote the fault.
f. Safety shutdown will occur.
5. Failure to ignite main.
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.
e. The flame signal should drop below 1.25 Vdc
within 0.8 or 3 seconds (depending on the FFRT of
the amplifier) after the interrupted pilot goes out.
f. *Main Flame Ign.* fault will be displayed on the
VFD. Fault code 19 will be displayed to denote
the fault.
g. Safety shutdown will occur.
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.
e. The flame signal should drop below 1.25 Vdc
within 0.8 or 3 seconds (depending on the FFRT of
the amplifier) after the main flame goes out.
f. *Main Flame Fail* fault will be displayed on the
VFD. Fault code 17 will be displayed to denote
the fault.
g. Safety shutdown will occur.
7. Opening a Preignition Interlock after the first five
second of POSTPURGE.
a. *Preignition ILK* fault will be displayed on the
VFD. Fault code 33 will be displayed to denote
the fault.
b. Safety shutdown will occur.
IMPORTANT:
1. If the RM7800 fails to shut down on any of these tests,
take corrective action; refer to Troubleshooting and
the RM7800 diagnostics and return to the beginning of
all Checkout tests.
2. When all Checkout tests have been completed, reset
all switches to original status.
41
RM7800E,G,L,M
CHECKOUT
65-0117—2