Conversion From Natural Gas To Propane Gas - Watts AERCO Modulex EXT Commercial Series User Manual

Modulex EXT Commercial Series Boilers User Manual
CHAPTER 4: Installation Instructions

4.37 CONVERSION FROM NATURAL GAS TO PROPANE GAS

To convert the unit to use propane gas, instead of natural gas, do the following:
Converting From Natural Gas to Propane Gas
1. Set nominal heat by adjusting the fan speed parameter FH (FAN MAX) from the E8
controller as shown in Table 4-6, MODULEX EXT Pressure and CO
Tables in Section 4.33.4. This parameter requires a password to change.
2. Adjust CO (%) minimum and maximum levels according to the type of gas as shown in the
2
table below. See section 4.33 - Burner Calibration, above, for more information.
GAS TYPE
Natural Gas
Propane Gas
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:
OMM-0095_0H
GF-139
CO LEVEL (%) MINIMUM
2
8.5
10
Figure 4-33: MODULEX EXT Label
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
Level Calibration
2
CO LEVEL (%) MAXIMUM
2
10
11
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09/15/2017