Chapter 6: Operation - Watts AERCO MLX EXT 321 Installation, Operation & Maintenance Manual

Modulating and condensing boilers
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Modulex Light Commericial Series

CHAPTER 6: Operation

CHAPTER 6: OPERATION
This chapter introduces the E8 controller basic menus/sub-menus needed to set up the
MODULEX EXT boiler. Refer to Chapter 4 for instructions for using the E8 controls to navigate
and change settings. For more detailed information concerning the E8 controller menus, sub-
menus, and functions, refer to the E8 Controller User Manual (GF-115-C).
Modulex E8 Controller Front Panel (Cover Closed)
Modulex E8 Controller Front Panel (Cover Open)
OMM-0087_J • GF-143 • 11/17/2020
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
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