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AQUATROL ZONE SYNCHRONIZING BOILER RESET CONTROLS
69-1979—04 4
Programming Instructions
Program the AQ251 by using the keypad and LCD display to
select parameters from the User Menu. Refer to Fig. 1 on
page 2 for an illustration of the LCD screen and keypad.
NOTE: The figures in “User Menu Structure” on page 8
provide a graphical layout of the AQ251’s User and
Installer menus.
When a new AQ2000 component is connected on the
AQUATROL network, it will be seamlessly integrated in the
system after a few seconds. If one or more components are
disconnected or stop providing data to the network, a
message will appear on the System Status display until the
fault is corrected.
User Menu Overview
The User Menu is intended for use by the building owner to
choose the LCD display preferences, Zone Settings (including
setpoint temperatures and setback times for each zone), and
temperatures for the WAKE, LEAVE, RETRN (return), and
SLEEP programs.
The Home Page and User Menu allow the building owner to:
• View the status of the system.
• Set up preferences for how the system information is
displayed.
• Set target temperatures for each zone (requires AQ1000
thermostats).
• Program times of the day when the system will set back the
temperatures for all zones (requires AQ1000 thermostats).
NOTE: If there are any problems with the system’s opera-
tion, the AQ251 displays error codes on the System
Status display of the LCD panel. For details on these,
refer to “Troubleshooting” on page 6.
TO ACCESS THE USER MENU:
Press the Menu button on the keypad at any time to access
the User Menu.
User Menu Settings
The User menu has five sub-menus.
• “System Status”
• “Preferences/Time”
• “Zone Settings (requires AQ1000 thermostats)”
• “Program Settings”
• “Statistics” on page 5
To make changes to the parameter settings in the User Menu,
refer to “LCD Display Navigation” on page 3.
SYSTEM STATUS
This is a detailed list of activities going on in the heating
system (e.g., call for heat, DHW disabled), and provide the
building owner with a quick snapshot of the heating system’s
operation, primarily for purposes of troubleshooting and
system diagnostics.
PREFERENCES/TIME
The preferences that the building owner can change in this
sub-menu are:
— The temperature scale for the display (Fahrenheit or
Celsius) for both the AQ251 control’s LCD and the
zone thermostats.
— The time display in 12 hour (e.g., 7:00 PM) or 24 hour
format (e.g., 19:00).
— Date and time of day – allows building owner to reset
day and time of day in the event of a power outage of
more than 4 hours (refer to Troubleshooting section).
— The Home Page display view, Simple or Detail. The
factory default is Detail.
— The LCD Backlight – illuminated permanently (ON) or
set to automatically turn off backlight after 1 hour
(AUTO).
POWER FAILURE
If a power disruption lasts for more than 4 hours, the message
PLS SET DAY/TIME displays and optionally, the AQ251's
backlight flashes repeatedly. This displayed message
continues until the DATE and TIME OF DAY are updated. See
“Power Disruption Greater Than 4 Hours” on page 6.
ZONE SETTINGS (REQUIRES AQ1000 THERMOSTATS)
Settings in this sub-menu define:
— The temperature setpoints (target temperatures) for
each zone in the heating system
— The temperature setback for each zone in the heating
system. This is the desired temperature drop when the
heating system enters the setback program SLEEP or
LEAVE.
— The maximum and minimum setpoints that can be
entered by a user at a thermostat screen for each
zone.
— Whether each zone can be set independently by the
AQ251 (i.e., some zones can be locked while others
are unlocked) depending on whether or not the key-
board on a thermostat is locked. When locked, no
changes can be made to a zone’s setpoint tempera-
ture through the thermostat. Changes can still be
made through the Zone Settings menu on the AQ251
control panel.
PROGRAM SETTINGS
Using the Program Settings sub-menu, the building owner can
define the time of day when the entire heating system will
change programs (e.g., from SLEEP to WAKE).
The AQ251 has provision for four different schedule periods
per day. They are defined as WAKE, LEAVE, RETRN (return),
and SLEEP:
WAKE: Period when you awaken and want your
home at a comfortable temperature.
LEAVE: Period when you are away from home and
want an energy-saving temperature.
RETRN: Period when you return home and want
your home back to a comfortable
temperature.
SLEEP: Period when you are asleep and want an
energy-saving temperature.
There are three modes of operation – Automatic, Occupied
and Unoccupied:
AUTO: In AUTO mode, the AQ251 follows the
WAKE, LEAVE, RETRN, and SLEEP
programs.
OCC: In OCC mode, the AQ251 holds the
temperature of OCCUPIED programs
(WAKE and RETURN). This might be used
if the occupancy pattern of the building