Benchmark 1.5ln dual-fuel low nox boiler, Gf-121 – AERCO BMK 1.5 LN Dual Fuel Feb 2013 User Manual
Page 83
CHAPTER 7: MAINTENANCE
PR2: 05/09/12 Page
83 of 162
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
10. Look into the observation port in the top head and ensure that you observe the orange
glow of the RSI flame during the ignition trial period.
NOTE
If you don’t see the orange glow, contact AERCO
technical support to ascertain the problem. If you DO
see it, proceed to the next step.
11. If the manometer reading is less than 3.0” w.c., increase the regulator setting by rotating
the adjustment screw clockwise (CW).
12. Repeat steps 8 through 11 until the gas pressure at the outlet of the RSI regulator reads
between 3.0” w.c. and 4.0” w.c. on the monometer.
13. Once the pressure reading is between 3.0” w.c. and 4.0” w.c., conduct at least three safe
RSI ignitions while observing the observation port. Assure the igniter lights immediately
with a strong orange flame after the Staged Ignition Solenoid Valve opens.
NOTE
Clear any Flame Loss During Ignition messages during
the tests by pressing The CLEAR key on control panel.
14. Close the external gas supply and RSI Staged Ignition Gas Valves. Disconnect the
manometer, tubing and barbed fitting from the 1/4” NPT port hole.
15. Bleed off any remaining pressure using the RSI bleed-off valve, then ensure this valve is
closed.
16. Replace the 1/4” plug in place of the barbed fitting.
17. OPEN the gas supply upstream of the unit.
18. Ensure power is restored and Boiler turned on in MANUAL Mode.
19. Open the Manual Shut-off Gas Valve (to the Air/Fuel Valve) and assure a smooth light off.
Perform this test three times.
20. Leak test the RSI line after the first solenoid valve.
21. Refer to paragraph 4.4 in
Initial Start-up to perform the Combustion Calibration.
22. Return the unit to service. Make sure that the unit is operating in AUTO Mode. The “MAN”
light in the upper left of the control box should NOT be lit in AUTO Mode.