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Modulex Light Commercial Series
CHAPTER 4: Installation Instructions
OMM-0158_A
• 6/28/2022 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
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4.35 Burner Calibration
W A R N I N G !
These instructions are for qualified AERCO service technicians or installers only.
All boilers come pre-calibrated and tested. However, if it is necessary to change the calibration
due to gas conversion or adaptation to the main supply system, the gas valve must be re-
calibrated (using
Service Mode
in the Burner Menu of the Ufly Controller, see section 6.5).
Installing the Gas Analyzer Probe
Before adjusting, a gas analyzer sensor probe must first be installed into the flue exhaust outlet
as shown in Figure 4-37.
Installing the Gas Analyzer Probe into Flue 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 4-33: Gas Analyzer Probe Location in Flue Outlet