Modulex Light Commercial Series
CHAPTER 4: Installation Instructions
OMM-0158_A
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Figure 4-34: Location of Minimum and Maximum Adjustments (Top View)
Maximum Output Calibration
After installing the gas analyzer probe (Figure 4-33), refer to Figure 4-38 to locate the gas valves
and the Maximum Gas Adjustment screw (A) on each valve. Follow the instructions below to set
the maximum gas output level for each valve.
Adjusting the Maximum (A) Gas Output Setting:
1. Remove the cap of the combustion gases sampling point (Figure 4-33) and connect a suitable
gas analyzer.
2. Operate the burner to a minimum power following the procedure described in Section 4.35
“Service Mode” function (MANUAL BOILER FIRING RATE REQUEST: 100%).
3. Check that the CO
2
values are within the values indicated in Table 4-6.
4. If necessary,
correct the value by turning the adjustment screw “A” in a CLOCKWISE direction
to decrease the value or ANTICLOCKWISE to increase the value.
5.
Repeat the adjustment for all gas valves in the boiler.
A
Maximum
Output Adjust
Minimum
Output Adjust
B
