6-4.2 Pilot Turndown Test - (Optional At Installation, Required Annually After); 6-4.3 Pilot Spark Pick Up Test - (Optional At Installation, Required Annually After) - Ace Heating Solutions Atlas A050 Operating And Maintenance Manual

6-4.2 Pilot Turndown Test - (Optional at Installation, Required Annually After)

To test that the main burner can be lit by the smallest pilot flame the can be seen by the flame amplifier and energize the
FLAME LED. Clean the flame detector to make sure that it detects the smallest acceptable pilot flame. This test should be
performed annually.
1) Open the Master switch
2) Close the manual main fuel shut off valves.
3) Connect a manometer, or pressure gauge, to measure pilot gas pressure during the turndown test.
4) Open the manual pilot shutoff valves.
5) Close the master switch
a. Go to Pilot Test Mode,
6) Start the system with a call for heat. Raise the setpoint of the operating controller. The Flame Safeguard
sequence should start, and the prepurge should begin. The sequence will hold in the pilot flame establishing
period and the flame led comes on when the pilot flame ignites.
*note: if the sequence does not stop, reset the system and make sure that the Pilot Test is selected.
7) Turn down the pilot gas pressure very slowly, reading the manometer as it drops. Stop instantly when the flame
led turns off. Note the pressure reading. The pilot flame is at the minimum turndown position. Immediately turn up
the pilot pressure until the flame led comes on again or the flame signal increases to above the flame threshold
value, 0.8 Vdc.
*Note: If there is no flame for 15 seconds in the TEST position, the Flame Safeguard locks out.
8) Repeat step 7 to verify the pilot gas pressure reading at the exact point the Flame LED turns off.
9) Increase the pilot gas pressure immediately until the flame LED turns on, then turn it down slowly to obtain a
pressure reading just above the dropout point or until the flame signal increases to above the flame threshold
value, 0.8 Vdc.
10) Turn the pilot hold test off and allow the Flame Safeguard to start a burner cycle. During the Main Flame
Establishing Period, make sure the automatic main fuel valve opens. Then smoothly open the manual main fuel
shutoff valve and watch for the main burner ignition. If the light off is not rough and the main burner flame is
established, go on to step 17.
*Note: this step requires 2 people, one to control the manual valve and one to watch for ignition.
11) If the main burner flame is not established within 5 seconds, close the manual main fuel shutoff valve and open
the master switch. If the light off is rough, the pilot flame size is too small.
12) Close the master switch and perform another pilot hold test, see step 5.
13) Increase the pilot flame size by increasing its fuel flow until a smooth main flame light off is accomplished.
14) Use orifices in the flame scanner sight tube until the pilot flame signal voltage is in the range of 0.7Vdc above the
flame threshold.
15) When the main burner lights reliably with the pilot at turndown, disconnect the manometer and turn up the pilot
gas flow to normal pressure of between 1"- 2" w.c.
16) Run the system through another cycle to check for normal operation.
17) Return the system to normal operation.

6-4.3 Pilot Spark Pick Up Test - (Optional at Installation, Required Annually After)

Perform this pilot spark pick up test to check that the ignition spark is not actuating the Flame LED. This test should be
performed annually.
1) Open the Master switch.
2) Close the pilot and main burner manual fuel shut-off valves, see figure 6.2.
3) Close the master switch.
a. Go to the S7999 Operator Interface Module.
b. Select Diagnostics Test button at the bottom of the display.
c. Select Diagnostics Test button at the bottom of this new screen.
d. Select Pilot Test at the bottom of this new screen
e. Select Start Test at the bottom of this screen.
4) Start the system with a call for heat. Raise the setpoint of the operating controller. The Flame Safeguard
sequence should start and the prepurge should begin. The sequence will hold in pilot flame establishing period
with only the ignition on. Ignition spark should occur but the flame signal should not be more than .5 Vdc.
i. If using the standard panel, refer to section Pilot Test under the section 3-5 Setup Mode.
ii. If using the enhanced panel, refer to section 5-10.10 TO ENABLE PILOT TEST
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