AERCO BMK 2.0 LN Natural Gas (SN G-11-1861 and above) - Manual (Page 50)

Chapter 4
Benchmark 2.0LN Low NOx Boiler
GF-123
Initial Start-Up Installation, Operation and Maintenance Manual OMM-0046_0E
Page 50 of 170 AERCO International Inc.● 100 Oritani Dr. ● Blauvelt, NY 10913. ● Ph: 800-526-0288 PR1 08/20/12
4.2.1 Required Tools & Instrumentation
The following tools and instrumentation are necessary to perform combustion calibration of the
unit:
•
Digital Combustion Analyzer: Oxygen accuracy to ± 0.4%; Carbon Monoxide (CO) and
Nitrogen Oxide (NOx) resolution to 1PPM.
•
16 inch W.C. manometer or equivalent gauge and plastic tubing.
•
1/4" NPT-to-barbed fittings for use with gas supply manometer or gauge.
•
Small and large flat blade screwdrivers.
•
Tube of silicone adhesive
4.2.2 Installing Gas Supply Manometer
The gas supply manometer (or gauge) is used to calibrate the gas pressure to be monitored on
the downstream side of the SSOV during the Combustion Calibration procedures described in
paragraph 4.4.
The gas supply manometer is installed at the downstream location on the 1/4” NPT port shown
in Figure 4-1. Note that a 1/4” plug must be removed from the port in order to install the
manometer.
Figure 4-1: Manometer Installation Location
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. However, if only one is
available, the RSI Regulator must be calibrated first, prior to moving the
manometer to the downstream location.
SSOV
GAS
INLET TO AIR/FUEL
VALVE
MANUAL
SHUT-OFF
VALVE
(Shown open)
RSI GAS
VALVE
(Shown Closed)
RSI
REGULATOR
1/4” NPT PLUG
(Install manometer here for
RSI Regulator Calibration)
1/4” NPT PLUG
(Install manometer
here for Combustion
Calibration)