Familiarization With Control; User Interface - Honeywell AQ251 User Operation And Maintenance

AQUATROL ZONE SYNCHRONIZING BOILER RESET CONTROLS
Model Function
AQ25142B Reset Boiler Control Panel
with integrated zoning
AQ25144B Reset Boiler Control Panel
with integrated zoning
AQ25110B Reset Boiler Control Panel
with no integrated zoning
AQ251 Approvals and Standards:
Canadian Standards Association: Certified, File No. LR76030
Replacement Parts and Accessories:
AQ1000: non-programmable zone thermostat
AQ15100B: Replacement Boiler Reset Control Module
AQ15740B: 4-zone valve expansion module
AQ15540B: 4-zone pump expansion module
AQ10X38: 24 Vac 38 VA transformer
AQ12C10: Replacement sensor, outdoor
AQ12C11: Replacement sensor, supply and return on boiler
loop
AQ12C20: Replacement floor / slab sensor
FAMILIARIZATION WITH
CONTROL

User Interface

The AQ251 User Interface consists of an LCD screen (16
characters by 3 rows) and a 7 button keypad for navigating
the menus as illustrated in Fig. 1.
STATUS OF SYSTEM DEMANDS
- CALL FOR HEAT
- CALL FOR DHW
- SIGNAL ON AUXILIARY INPUT
GRAPHIC SHOWING
THE PERCENTAGE
OF THE BOILER'S
HEATING CAPACITY
AT WHICH IT'S
OPERATING; ARROWS
ABOVE AND BELOW
THE BAR SHOW THE
TREND OF THE
BOILER'S
TEMPERATURE
(UP OR DOWN)
STATUS OF LINE VOLTAGE OUTPUTS
- PRIMARY (BOILER) HEAT
- DHW PUMP
- AUXILIARY "PUMP" OUTPUT
69-1979—04
Table 1. AQ251 Models
DHW
Selectable DHW priority, with
optional priority override
Selectable DHW priority, with
optional priority override
Selectable DHW priority, with
optional priority override
Keypad
The 7- button keypad provides the following functions.
Menu
Home
OK
and v
^
– and +
STATUS OF SYSTEM OUTPUTS
- AUXILIARY OUTPUT ACTIVE
- BOILER T-T OUTPUT ACTIVE
DOWN ARROW, IF DISPLAYED,
INDICATES THAT OTHER MENU ITEMS
EXIST BELOW AND CAN BE VIEWED
BY SCROLLING DOWN WITH
THE
Fig. 1. LCD Dot Matrix Display Layout.
2
Zones
2 – 16, Line voltage circulators or 2-wire zone
in sets of 4 valves
2 – 16, 24 Vac zone valves with end switches
in sets of 4
1 None; user can add zoning with
Expansion Zoning Panels (sold
separately)
Press this button to access the User Menu. When
pressed while in a sub-menu, the sub-menu's
values are saved before going up one level in the
current menu.
Press this button to leave the User or Installer
Menu and return to the Home Page display screen.
Press this button to enter a sub-menu of the active
menu item. A menu item is active when the
indicator arrow (←) is positioned beside the item.
Press these buttons to scroll up/down in the menu
items. Pressing one of these buttons automatically
exits the edit mode, and the selection moves to the
previous or next menu item.
Press these buttons to decrease/increase the value
of a selected menu item, or to scroll through a list of
pre-defined options.
- If the menu item being modified is a number, the
displayed value will decrease/increase by pressing
these buttons. When holding the – or + button for
more than a second, the values automatically
decrease/increase at a faster pace, similar to
setting the time on a digital clock radio
- If the menu item is an option, pressing these
buttons scrolls through the list of available options
one at a time.
DISPLAY AREA SHOWING
UP ARROW, IF DISPLAYED,
SYSTEM STATUS AND MENU
INDICATES THAT OTHER MENU
OPTIONS AND SELECTIONS
ITEMS EXIST ABOVE AND CAN
MADE
BE VIEWED BY SCROLLING
UP WITH THE
ARROW INDICATES
THE CURRENTLY SELECTED
"ACTIVE" MENU ITEM.
BUTTON.
Zone Control
.
BUTTON.
M27748