WARNING:
Do not open the manual main gas cock (Figure 7 item 4) before all pre checks, setups, and dry runs have been successfully completed.
With a voltmeter check for the proper incoming main voltage and the proper control voltage from the control circuit transformer. Refer to the electrical wiring diagram and
Make sure the boiler is full of water and proper flow has been established.
Power up the boiler see (paragraph 2.2.1).
Navigate to the ‘Operation Screen’ (paragraph 2.2.11). Select the burner switch to toggle the burner to the off state.
Navigate to the ‘Firing Rate Control Page’ (paragraph 2.2.14). Select the ‘Manual in Run” option and enter the light off RPM from (Table 9 Approximate Boiler Settings) in the Manual Firing Rate box. This will prevent the burner from ramping up to high fire after the flame stabilization period.
Navigate to the ‘Annunciation Page” (paragraph 2.2.12). All load control inputs and interlocks should be in the on state with the exception of the air flow switch. The air flow switch will close when the burner is commanded to start. Correct any problem indicated. Refer to trouble shooting (paragraph 0) for further help.
Navigate to the ‘Operation Screen’ (paragraph 2.2.11). The boiler is now prepared to be placed in the on state by toggling the burner switch to on.
2.3.4DRY RUN
Navigate to the ‘Operation Screen’ (paragraph 2.2.11). Toggle the burner switch to on.
Navigate to the ‘Status Page’ (paragraph 2.2.5). If there is demand for hot water the burner state will display driving to purge. When the fan speed is within +/- 3% of the firing rate for 3
Date: 8-4-2010
Revision: 0
Form: 2396
seconds the purge timer will start and count to
30.After 30 seconds the fan speed is reduced to the light off rate. When the fan speed is with in +/- 3% of the firing rate for 3 seconds the ignition transformer and the pilot valve are energized. The pilot will light and can be observed from the observation port (Figure 5 item 4). After a duration of 5 seconds the ignition transformer will
The main gas valves will energize for 10 seconds. After this 10 second duration the pilot valve is
WARNING:
During the first 10 seconds of this process the automatic gas valves should not have opened or been energized. If any of the automatic gas valves are energized or open at this point correct the problem immediately.
2.3.5PILOT ADJUSTMENT
Adjust the pilot gas pressure between 3.5 iwc and 4 iwc. The pilot flame signal can be observed from the status page (paragraph 2.2.5). The minimum flame signal is .8 volts. The flame signal can vary between 4 volts and 15 volts. A flame signal closer to 15 volts is preferred. Observe the pilot flame through the flame observation port (Figure 5 item 4). The pilot should appear stable. A stable pilot will not flicker on and off. Recycle the boiler as many times as needed to establish a good pilot. If the pilot fails to light refer to trouble shooting (paragraph 1.1.1) for further help.
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