7800 SERIES RELAY MODULES
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
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
2.Observe the equipment manufacturer
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
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.
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