E8 Heating Mode Selection - Watts AERCO MLX EXT 321 Installation, Operation & Maintenance Manual

Modulex Light Commericial Series
CHAPTER 5: E8 Controller and BMC Modules

E8 HEATING Mode Selection

Heating modes may be selected using the Rotary Knob on the controller when the hinged door
is in the closed position (NORMAL Mode). As the Rotary Knob is turned, each appropriate
heating mode symbol is displayed, in turn, along the lower edge of the display.
Mode changes take effect when the setting is not changed for 5 seconds. The symbols and
description for the available heating modes are shown in Figure 5-3.
Figure 5-3: E8 HEATING Mode Display Features (NORMAL Mode)
TABLE 5-2: E8 HEATING Mode Features and Functions (NORMAL Mode)
SYMBOL MODE NAME
Heating Mode
Selection
Standby / OFF
Automatic Mode 1
Automatic Mode 2
Summer Mode
Day Mode
Night Mode
Service Mode
OMM-0087_J • GF-143 • 11/17/2020
Turn the Rotary Knob to select the heating mode required.
The heating mode is indicated by a symbol at the bottom
of the display. It takes effect when the setting is not
changed for 5 seconds.
Heat OFF and hot water (HW) preparation OFF, only
frost protection mode.
Heat according to timer program 1; HW according to HW
program.
Heat according to timer program 2; HW according to HW
program.
Heating OFF, HW according to HW program.
24 Hour heating with comfort temperature 1; HW
according to HW program.
24 Hour heating with reduced temperature; HW according
to program.
Automatic reset after 15 minutes. Boiler regulated at max
boiler temperature.
Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST
Heating Mode
Symbols: Only the
one currently
selected mode will
be displayed.
DESCRIPTION
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