2nd Ave. Honeywell Relay Modules 7800 Series - Manual (Page 6)

6
7800 SERIES RELAY MODULES
65-0229—1
IGNITION SPARK RESPONSE TEST
(ALL ULTRAVIOLET DETECTORS)
Test to make certain that the ignition spark is not actuating
the FLAME LED:
1. Close the pilot and main burner manual fuel shut-off
valve(s).
2. Start the burner and use the Run/Test Switch (if
available) to stop the sequence in the PILOT IGN
period. Ignition spark should occur, but the flame signal
should not be more than 0.5 Vdc.
3. If the flame signal is higher than 0.5 Vdc and the
FLAME LED does come on, consult the equipment
operating manual and resight the detector farther out
from the spark, or away from possible reflection. It may
be necessary to construct a barrier to block the ignition
spark from the detector view. Continue adjustments
until the flame signal due to ignition spark is less than
0.5 Vdc.
NOTE: The Honeywell Q624A and Q652A,B Solid State
Spark Generators prevent detection of ignition spark
when properly applied with C7027, C7035, C7044 or
C7061 Ultraviolet Flame Detectors. The Q624A and
Q652B are only for use with gas pilots; the Q652A is
only for oil applications.
Response To Other Ultraviolet Sources
Some sources of artificial light (such as incandescent or
fluorescent bulbs, mercury sodium vapor lamps and daylight)
produce small amounts of ultraviolet radiation. Under certain
conditions, an ultraviolet detector responds to these sources
as if it is sensing a flame. To check for proper detector
operation, check the Flame Failure Response Time (FFRT)
and conduct Safety Shutdown Tests under all operating
conditions.
Flame Signal With Hot Combustion Chamber
(All Installations)
1. With all initial start-up tests and burner adjustments
completed, operate the burner until the combustion
chamber is at the maximum expected temperature.
2. Observe the equipment manufacturer warm-up
instructions.
3. Recycle the burner under these hot conditions and
measure the flame signal. 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.
4. Check the FFRT of the flame amplifier and relay
module.
5. Lower the setpoint of the operating controller and
observe the time it takes for the burner flame to go out.
This should be within the maximum FFRT.
6. If the flame signal is too low or unsteady, check the
flame detector temperature. Relocate the detector if the
temperature is too high.
7. If necessary, realign the sighting to obtain the proper
signal and response time.
8. If the response time is still too slow, replace the Plug-in
Flame Signal Amplifier.
9. 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 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 (only for RM7800, EC/RM7840,
RM7838B, EC7810, EC7820, EC/RM7830, EC/
RM7850).
a. *Preignition ILK* fault is displayed on the
Keyboard Display Module. Fault code 10 or 33 is
displayed to denote the fault.
b. Safety shutdown occurs.
2. Opening a Lockout Interlock during PREPURGE,
PILOT IGN, MAIN IGN or RUN period (only for
RM7800, EC/RM7840, RM7838B, EC7810, EC7820,
EC/RM7830, EC/RM7850).
a. *Lockout ILK* fault is displayed on the Keyboard
Display Module. Fault code 11 or 12 or 21 or 29 is
displayed to denote the fault.
b. Safety shutdown occurs.
3. Detection of flame 40 seconds after entry to STANDBY
from RUN, fault code 9. 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 Detected* fault is displayed on the
Keyboard Display Module. Fault code 9 or 15 or
18 is displayed to denote the fault.
c. Safety shutdown occurs.
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. *Pilot Flame Fail* fault is displayed on the
Keyboard Display Module. Fault code 28 is
displayed four or ten seconds, depending on the
jumper configuration selection for Pilot Flame
Establishing Period (PFEP) after the pilot valve(s)
is energized to denote the fault.
e. 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.
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. *Main Flame Ign.* fault is displayed on the
Keyboard Display Module. Fault code 19 is
displayed to denote the fault.
g. Safety shutdown occurs.