Combustion calibration setup, Installing the supply gas manometer, Preparing the flue vent probe hole – AERCO KC Standard to Low NOx Convertion Instructions User Manual
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5.2 Combustion Calibration Setup
Prior to performing Combustion Calibration procedures in paragraph 5.3 or 5.4, the unit must be set
up as follows:
5.2.1 Installing The Supply Gas Manometer
1.
Close the manual gas supply valve upstream of the unit.
2.
Refer to Figure 28 and remove the 1/4” or 1/8” NPT pipe plug from the port on the inlet side of
the Siemens or Honeywell SSOV.
3.
Install a barbed fitting into the pipe plug tapping.
4.
Attach one end of a length of plastic tubing to the barbed fitting and one end to the 16" W.C.
manometer.
Figure 28. Installation of Supply Gas Manometer
5.2.2 Preparing the Flue Vent Probe Hole
1. If the unit has been installed using the recommended AL29-4C vent, there will be a 3/8” hole,
18” to 24” above the exhaust manifold. The outer vent section, that covers vent connections,
must be loosened and moved to uncover the hole (see Figure 29).
2. If so equipped, adjust the stop on the combustion analyzer probe so that it extends into the
flue gas flow without hitting the opposite wall of the flue. Do not insert the probe at this time.