AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 44)

CHAPTER 4: INITIAL START-UP
Page 44 of 162 PR2: 05/09/12
Benchmark 1.5LN Dual-Fuel Low NOx Boiler
Operation and Maintenance Manual
OMM-0041_0C
GF-121
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 • Ph: 800-526-0288
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 for Combustion Calibration
MANUAL SHUTOFF
VALVE
NATURAL
GAS SSOV
PROPANE
GAS SSOV
NATURAL
GAS INLET
PROPANE
GAS INLET
TO AIR/FUEL
VALVE
NATURAL GAS HIGH
GAS PRESSURE
SWITCH
PROPANE HIGH GAS
PRESSURE SWITCH
1/4” NPT PLUG (Install
Combustion Calibration
manometer here)
PROPANE
PRESSURE
REGULATOR
FEEDBACK LINE
NATURAL GAS
PRESSURE
REGULATOR
FEEDBACK LINE
LEAK DETECTION
BALL VALVE