High Altitude Adjustment - Watts AERCO MLX EXT 321 Installation, Operation & Maintenance Manual

Modulating and condensing boilers
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Modulex Light Commericial Series
CHAPTER 4: Installation Instructions

4.37 HIGH ALTITUDE ADJUSTMENT

It is necessary to adjust the fan speed at altitudes at or above 5,000 feet. Modify the parameter
FAN MAX from the E8 Control Panel. Note that it is modifiable only with an access code. See
Table 4-7 on the next page for a list of the FA (Factory) parameters.
WARNING!
This conversion to high altitude
operation
shall
be
made
qualified
service
agency
accordance with the manufacturer's
instructions and all applicable codes
and requirements of the authority
having
jurisdiction.
The
service agency is responsible for the
proper installation of this conversion.
The installation is not proper and
complete until the operation of the
converted appliance is checked as
specified
in
the
manufacturer's
instructions supplied with the unit.
Figure 4-41: Adjusting Fan Speed to Set Input Range for High Altitude
OMM-0087_J • GF-143 • 11/17/2020
by
a
in
qualified
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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