AERCO BMK 2.0 LN Dual Fuel Serial G-11-2402 and UP - Manual (Page 43)

CHAPTER 4: INITIAL START-UP
PR2: 04/22/13 Page 43 of 160
Benchmark 2.0LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0052_0E
GF-127
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
NOTE
If a second 16” W.C. manometer is available, it can be installed in
the SSOV downstream location to provide continuous monitoring
at both the upstream and downstream ports of the SSOV.
]Install the 16” W.C. manometer(s) as described in the following steps:
1. Turn off the main gas supply upstream of the unit.
2. Remove the top panel and left or right side panel from the boiler to access the gas train
components.
3. To monitor the gas pressure on the downstream side of the SSOV during Combustion
Calibration (paragraph 4.5 and 4.6), remove the 1/4” NPT plug from the appropriate leak
detection ball valve (natural gas or propane) on the downstream side of the SSOV as
shown in Figure 4-1.
4. Install a NPT-to-barbed fitting into the tapped plug port.
5. Attach one end of the plastic tubing to the barbed fitting and the other end to the 16”
W.C. manometer.
Accessing the Analyzer Probe Port 4.2.3
The unit contains NPT plugs on the left and right side of the exhaust manifold at the rear of the
unit as shown in Figure 4-2. Prepare the port for the combustion analyzer probe as follows:
1. Remove the plug from the probe port on the left or right side of the exhaust manifold.
2. If necessary, adjust the stop on the combustion analyzer probe so that it will extend mid-
way into the flue gas flow. DO NOT install the probe at this time.
EXHAUST
MANIFOLD
1/2” NPT
CONDENSATE
DRAIN
CONNECTION
BOILER
RETURN
ANALYZER
PROBE PORT
Figure 4.2: Analyzer Probe Hole Location