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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 front 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 (section 4.3), 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.
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.
4.2.3 Accessing the Analyzer Probe Port
The unit contains a 1/4" NPT port on the side of the exhaust manifold as shown in Figure 4-2.
Prepare the port for the combustion analyzer probe as follows:
1. Refer to Figure 4-2 and remove the 1/4" NPT plug from the exhaust manifold.
2. If necessary, adjust the stop on the combustion analyzer probe so it will extend mid-way
into the flue gas flow. DO NOT install the probe at this time.
DRAIN VALVE
ANALYZER PORT
Figure 4-2: Analyzer Probe Port Location (Right Side Partial View)
OMM-0097_0C
GF-142
Benchmark 1500 - 2000 Boilers
CHAPTER 4 – INITIAL START-UP
Installing Gas Supply Manometer
Accessing the Analyzer Probe Port
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Ph.: 800-526-0288
AIR INLET
PRIMARY HOT
WATER INLET
EXHAST MANIFOLD
CONDENSATE DRAIN
Page 51 of 184
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