AQUATROL ZONE SYNCHRONIZING INJECTION/MIXING BOILER RESET CONTROLS
69-1990—03
2
Table 1. AQ252 Models
AQ252 Approvals and Standards:
Canadian Standards Association: Certified, File No.
LR76030
Replacement Parts and Accessories:
AQ1000TN2: non-programmable zone thermostat
AQ15200B: Replacement injection/mixing reset boiler
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 and supply sensor on secondary loop
AQ12C20: Floor / slab sensor
FAMILIARIZATION WITH
CONTROL
User Interface
The AQ252 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.
Keypad
The 7- button keypad provides the following functions.
Menu
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.
Home
Press this button to leave the User or Installer
Menu and return to the Home Page display
screen.
OK
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.
^
and v
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.
– and +
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.
Fig. 1. LCD display and keypad layout.
Model
Function
DHW Zones
Zone
Control
AQ25242B
Injection/Mixing Boiler
Reset Control Panel with
integrated zoning
Selectable DHW priority,
with optional priority
override
2 – 16,
in sets of
4
Line voltage circulators or 2-wire
zone valves
AQ25244B
Injection/Mixing Boiler
Reset Control Panel with
integrated zoning
Selectable DHW priority,
with optional priority
override
2 – 16,
in sets of
4
24 Vac zone valves with end switches
?? ARROW INDICATES
THE CURRENTLY SELECTED
“ACTIVE” MENU ITEM.
M27698
UP ARROW, IF DISPLAYED,
INDICATES THAT OTHER MENU
ITEMS EXIST ABOVE AND CAN
BE VIEWED BY SCROLLING
UP WITH THE BUTTON.
DOWN ARROW, IF DISPLAYED,
INDICATES THAT OTHER MENU ITEMS
EXIST BELOW AND CAN BE VIEWED
BY SCROLLING DOWN WITH
THE BUTTON.
GRAPHIC SHOWING THE DEGREE OF
MIXING IN THE SECONDARY LOOP:
# OF BARS INCREASES AS
A
) THE
INJECTION PUMP SPEED INCREASES,
B
) THE VOLTAGE OF THE MODULATING
VALVE SIGNAL INCREASES OR
C
) THE
ACTUAL MIX TEMPERATURE APPROACHES
THE MAXIMUM MIX TEMPERATURE
STATUS OF SYSTEM DEMANDS
- CALL FOR HEAT
- CALL FOR DHW
- SIGNAL ON AUXILIARY INPUT
STATUS OF SYSTEM OUTPUTS
- AUXILIARY OUTPUT ACTIVE
- BOILER T-T OUTPUT ACTIVE
DISPLAY AREA SHOWING
SYSTEM STATUS AND MENU
OPTIONS AND SELECTIONS
MADE
STATUS OF LINE VOLTAGE OUTPUTS
- PRIMARY (BOILER) HEAT
- DHW PUMP
- SECONDARY PUMP
- AUXILIARY “PUMP” OUTPUT
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)
?
