AERCO BMK 1.5 LN Dual Fuel Feb 2013 - Manual (Page 45)

CHAPTER 4: INITIAL START-UP
PR2: 05/09/12 Page 45 of 162
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
]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. Perform the RSI regulator Safe Test as described in paragraph 4.3. If test shows a
successful RSI ignition, proceed to the next step. If RSI ignition is not successful, follow
instructions in paragraph 4.3 before attempting Combustion Calibration.
4. To monitor the gas pressure on the downstream side of the SSOV during Combustion
Calibration (paragraph 4.4), remove the 1/4” NPT plug from the leak detection ball
valve on the downstream side of the SSOV as shown in Figure 4-1.
5. Install a NPT-to-barbed fitting into the tapped plug port.
6. Attach one end of the plastic tubing to the barbed fitting and the other end to the 16”
W.C. manometer.
4.2.3 Accessing the Vent Probe Port
The unit contains a NPT plug on 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 top 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
CONDENSATE DRAIN
CONNECTION
VENT PROBE
PORT
UNIT
FRAME
PARTIAL TOP VIEW
Figure 4.2: Analyzer Probe Hole Location
4.3 RSI REGULATOR SAFE TEST
The Benchmark 1.5LN contains a RSI regulator in the Regulated Staged Ignition (RSI) line
of the unit. The RSI regulator is calibrated prior to shipment, however the RSI system
should be safe tested prior to performing the Combustion Calibration Procedure to ensure it
is working properly. RSI regulator safe testing is performed as follows: