Modulex EXT Commercial Series
CHAPTER 4: Installation Instructions
OMM-0160_A
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4.36 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 with the appropriate information and applied to
the unit in close proximity to the rating label. If the unit is calibrated again for normal altitude
operation, the label should be removed.
Figure 4-25: High Altitude Conversion Label
4.37 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 the
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 4.33 - Burner Calibration for more information.
Gas Type
CO
2
Level (%) Minimum Output
CO
2
Level (%) Maximum Output
Natural Gas
9.1
9.2
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 4-26: MODULEX EXT Label
Summary of Contents for AERCO MLX EXT 1500 2S
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