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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4.38 High Altitude Conversion Label
After calibration of the unit from Normal Altitude (0 - 2,000 feet) to High Altitude (2,000
–
4,500 feet) operation, the label below must be filled out and near the rating label. If the
unit is calibrated again for normal altitude operation, the label should be removed.
Figure 4-37: High Altitude Conversion Label
4.39 Conversion From Natural Gas To Propane Gas
1. Set nominal heat by changing parameter 526 (
FU
: Fan maximum speed) of the
BMM
in
the Devices Menu. Refer to Modulex EXT Pressure and CO
2
Level Calibration in Table 4-
6 for appropriate value. This parameter requires a password to change.
2. Adjust CO
2
(%) minimum and maximum levels according to the type of gas as shown in
table below. See section 4.34, Burner Calibration for more information.
Gas Type
CO
2
Level (%) Minimum Output
CO
2
Level (%) Maximum Output
Natural Gas
8.9
9.0
Propane Gas
10.8
10.8
3.
After gas conversion to propane and calibration, the gas installer should complete and
apply this label, or equivalent, as close to the rating label as possible:
Figure 4-38: MODULEX EXT Label
