Honeywell AQ251 Manual Do Utilizador

69-1979—04

4

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. 

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. 

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