Honeywell AQ25A Series Technical Reference Booklet page 295

boiler Compatibility
Today, there are so many boilers with
different types of controls built into
them, it can be confusing figuring out
which AQ controls to use with which
boiler. In general, you should select an
AQ2000 control panel to compliment
your boiler's capability. Use the
convenient selection chart below to
select a panel that best suits your job!
Even the "smartest" boilers need zoning
controls.
For example, if your boiler already has outdoor resent on board, there's no need for an
AQ panel with reset capability. Instead, use an AQ250 control panel to provide smart
zoning to the system, such as Zone synch, freeze protection, DHW priority, pump/valve
exercise, etc...
An AQ25A Panel has advanced set-up
features that decrease installation time.
Consider using an AQ25A panel with a programmable LCD
screen to speed up your installation and provide your customer
with the added value of having the outdoor temperature
displayed on each AQ1000 thermostat!
AQ2000 Control
Panel Selection Chart
On/Off Boiler
Modulating/Condensing
Boiler With Zone Control
Modulating/Condensing
Boiler Without Zone Control
How many reset water temperatures
does the installation have?
1 2
AQ250 or
AQ252
AQ251
AQ250 or
AQ252
AQ251
AQ251 AQ252
3
AQ252 +
AQ254
AQ252 +
AQ254
AQ252 +
AQ254
11