Menu And Sub-Menu Descriptions; Menus (Top Level); Sub-Menus - Watts AERCO MLX EXT 321 Installation, Operation & Maintenance Manual

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

6.3 MENU AND SUB-MENU DESCRIPTIONS

There are six top level menus and five sub-menus as listed below.

Menus (Top Level):

GENERAL
Value selection summary. Service => for service engineers. Date/Time/Holiday => for
users.
DISPLAY
System value display (e.g. sensor values and setpoints). No adjustments can be made.
USER
Summary of settings that can be made by the operator.
TIME PROGRAMS
Summary of time programs for heating circuits, the hot water circuit and extra functions
where applicable
EXPERT
Summary of values for which expert knowledge is required to make settings (installation
technician). Values in the expert level are protected by a code number.
EXPERT FA (Only for FA via BUS)
Uploads/edits the information in the BMM. For AERCO trained technicians only.

Sub-Menus:

INSTALLATION
All display values and settings that relate to the unit or the entire system and cannot be
assigned to a consumer circuit.
HOT WATER
All display values and settings that affect central hot water preparation and circulation.
HEATING CIRCUIT I
All indicator and set values that relate to the consumer circuit 1 (also, for example, as
decentralized hot-water circuit).
HEATING CIRCUIT II
All indicator and set values that relate to the consumer circuit 2 (also, for example, as
decentralized hot-water circuit).
SOLAR/MF
All indicator and set values that relate to solar energy recovery and settings for the
multifunction relay.
OMM-0087_J • GF-143 • 11/17/2020
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Page 100 of 150

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