Burner Calibration; Installing Gas Analyzer Probe Into Flue Outlet - Watts AERCO EXT Installation, Operation & Maintenance Manual

Modulex EXT Commercial Series
CHAPTER 4: Installation Instructions

4.33 Burner Calibration

W A R N I N G !
All the instructions indicated below are for the exclusive use of qualified AERCO service
technicians or installers.
All the boilers are supplied already calibrated and tested. However, if it is necessary to change
the calibration due to gas conversion or adaptation to the mains supply system, the gas valve
must be re-calibrated (using Service Mode in the Burner Menu of the Ufly Controller, see
section 6.5.

4.33.1 Installing Gas Analyzer Probe into Flue Outlet

Before adjusting, a gas analyzer sensor probe must be installed into the flue exhaust outlet.
1. Remove the cap (#2) from the gas outlet (#1)
2. Install the probe adapter (#3) into the gas outlet (#1) where cap was removed.
3. Insert the analysis probe (#4) into hole of the probe adaptor.
4. After measurements are taken and adjustments made, remove the probe, probe adaptor, then
reinstall the cap (#2) onto the gas outlet (#1).
Figure 4-22: Gas Analyzer Probe Location in Flue Outlet
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