AERCO BMK 2.0 LN October 2012 - Manual (Page 91)

GF-123
Benchmark 2.0LN Low NOx Boiler
Chapter 7
OMM-0046_0F I nstallation, Operation and Maintenance Manual Maintenance
PR1 10/17/12 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 Page 91 of 172
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 Chapter 4, Initial Start-up to perform the Combustion Calibration
procedure.
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.
Figure 7-4: RSI Manometer Installation Location
7.5 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-
Safety Device Testing Procedures.
7.6 BURNER ASSEMBLY INSPECTION
The burner assembly (part no. 24176) is located at the top of the unit's heat exchanger. The
burner assembly may be hot. Therefore, allow the unit to cool sufficiently before removing the
burner assembly. It should be noted that the complete burner assembly also includes the blower
and air/fuel valve in addition to the Benchmark 2.0 Low NOx burner. The following parts will be
required for reassembly after burner inspection:
RSI Gas Supply Valve
(shown in open position)
Remove this 1/4”
NPT plug to reveal
tapped hole for
installing manometer.
RSI Bleed-off
Valve (shown in
closed position).
RSI Pressure
Regulator
To Air/Fuel Valve
Manual Shut-Off
Valve (shown in
open position)