Service Menu - Watts AERCO MLX EXT 321 Installation, Operation & Maintenance Manual

Modulating and condensing boilers
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Modulex Light Commericial Series
CHAPTER 6: Operation

6.5 SERVICE MENU

The SERVICE menu contains the TEST RELAY, SENSOR TEST, and OTHER PARAMETERS
sub-menus as shown below:
NOTE
The SERVICE menu is accessed as shown below. However, SERVICE MODE (
) is different
and can only be accessed when the E8 cover is closed.
Figure 6-6: SERVICE Menu
OMM-0087_J • GF-143 • 11/17/2020
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 103 of 150

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