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SECTION 4 INITIAL START-UP
4.2.3 Accessing the Analyzer Probe Port
CFR units contain 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 4-1 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.
4.3 Combustion Calibration
All CFR models are preconfigured at the factory to use natural gas. The CFR boiler is combustion
calibrated for Standard NOx emissions (<20 ppm). The gas pressure must be within the ranges shown in
Table 4-2 for each model of boiler at full fire.
Recalibration as part of initial start-up is necessary due to changes in the local altitude, gas BTU content,
gas supply piping and supply regulators. Combustion Calibration Test Data sheets are shipped with each
unit. These sheets must be filled out and returned to AERCO for proper Warranty Validation.
Perform the combustion calibration procedure below to provide optimum performance and to keep
readjustments to a minimum.
Figure 4-2: Gas Pressure Adjustment Screw and TAC Screw Location
4.3.1 NATURAL GAS Manual Combustion Calibration
1. Ensure the Edge Controller's Enable/Disable switch is set to Disable.
2. Open the water supply and return valves to the unit and ensure that the system pumps are running.
3. Open the NATURAL GAS supply valve to the unit.
4. Turn external AC power to the unit ON.
5. On the Controller, go to:
technician level password.
6. The first Manual Combustion Calibration screen appears lists the three steps that must be
completed before continuing.
•
Main Menu → Calibration → Manual
•
Combustion.
If necessary, enter a
•
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