AERCO BMK 6000 Dual Fuel - Manual (Page 104)

Benchmark 6000 DF Installation, Operation & Maintenance Manual
CHAPTER 7 – MAINTENANCE
Page 104 of 219 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0096_0B
03/21/2014
Ph.: 800-526-0288
GF-141
Pilot Regulator Pressure Calibration Procedure – Continued
7. Turn ON electrical power to the system.
8. Start the boiler in the MANUAL Mode. Observe the manometer pressure when the Pilot
solenoid “clicks” open after purge. The manometer should now provide a reading of 4.9”
W.C.
NOTE
If you DO NOT see the orange glow, contact AERCO technical support to
ascertain the problem. If you DO see it, proceed to the next step.
9. Pull out the optical flame scanner and look into the observation port in the front plate.
Ensure that the orange glow of the Pilot flame is observed during the ignition trial period.
10. If the manometer reading is less than 4.8” W.C., increase the regulator setting by rotating
the adjustment screw clockwise (CW).
11. Repeat steps 8 through 10 until the gas pressure at the outlet of the Pilot Regulator
pressure reads between 4.8” W.C. and 5.0” W.C. on the monometer.
12. Once the pressure reading is between 4.8” W.C. and 5.0” W.C., conduct at least three safe
Pilot ignitions while observing the observation port. Assure the igniter lights immediately
with a strong orange flame after the Pilot ignition solenoid valve opens.
NOTE
Clear any Flame Loss During Ignition messages during the tests by
pressing the CLEAR key on control panel.
13. Close the external gas supply valve. Disconnect the manometer, tubing and barbed fitting
from the 1/4” NPT port hole.
14. Replace the 1/4” plug where the barbed fitting was removed.
15. OPEN the gas supply upstream of the unit.
16. Ensure power is restored and the boiler is turned on in the MANUAL Mode.
17. Refer to sections 4.4 and 4-5 in Chapter 4 - Initial Start-up, to perform the Combustion
Calibration procedure.
18. Return the unit to service following successful completion of the Combustion Calibration
procedures. Make sure that the unit is operating in the AUTO Mode. The “MAN” light in the
upper left of the control box should NOT be lit in AUTO Mode.
7.6 SAFETY DEVICE TESTING
Systematic and thorough tests of the operating and safety devices should be performed to
ensure that they are operating as designed. Certain code requirements, such as ASME CSD-1,
require that these tests be performed on a scheduled basis. Test schedules must conform to
local jurisdictions. The results of the tests should be recorded in a log book. See Chapter 6 for
Safety Device Testing Procedures.