AERCO BMK 1.5 LN October 2012 - Manual (Page 84)

CHAPTER 7
MAINTENANCE
Page 84 of 166 AERCO International Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288 PR1:10/18/12
Benchmark 1.5LN Low NOx Boiler
Installation, Operation and Maintenance Manual
GF-120
OMM-0041 0E
Start the boiler in MANUAL Mode. Observe the manometer pressure when the RSI 9.
solenoid “clicks” open after purge. The manometer should now provide a reading of less
than 5.0” w.c.
Look into the observation port in the top head and ensure that you observe the orange 10.
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.
If the manometer reading is less than 3.0” w.c., increase the regulator setting by rotating 11.
the adjustment screw clockwise (CW).
Repeat steps 8 through 11 until the gas pressure at the outlet of the RSI regulator reads 12.
between 3.0” w.c. and 4.0” w.c. on the monometer.
Once the pressure reading is between 3.0” w.c. and 4.0” w.c., conduct at least three safe 13.
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.
Close the external gas supply and RSI Staged Ignition Gas Valves. Disconnect the 14.
manometer, tubing and barbed fitting from the 1/4” NPT port hole.
Bleed off any remaining pressure using the RSI bleed-off valve, then ensure this valve is 15.
closed.
Replace the 1/4” plug in place of the barbed fitting. 16.
OPEN the gas supply upstream of the unit. 17.
Ensure power is restored and Boiler turned on in MANUAL Mode. 18.
Open the Manual Shut-off Gas Valve (to the Air/Fuel Valve) and assure a smooth light 19.
off. Perform this test three times.
Leak test the RSI line after the first solenoid valve. 20.
Refer to Chapter 4, paragraph 4.4 and perform the Combustion Calibration procedures.. 21.
Return the unit to service. Make sure that the unit is operating in AUTO Mode. The 22.
“MAN” light in the upper left of the control box should NOT be lit in AUTO Mode.