AQ25A SERIES PROGRAMMABLE BOILER CONTROL PANELS
369-2119—02
Dimensions (HxWxD): 8 x 16 1/2 x 3 3/8 in. (20.3 x 42 x
8.5 cm) approximate
Weight: 4.9 lb. (2.3 kg)
Approvals: Canadian Standards Association: Certified, File
No. LR76030
1 INSTALLATION PREPARATION
NOTES: Throughout these instructions, the following
terminology conventions are used:
—AQ155 refers to the AQ15540B Zoning Module
—AQ157 refers to the AQ15740B Zoning Modules.
—AQ15A refers to the AQ15A10B Control Module within
an AQ25A Series Control Panel.
—AQ25A refers to the AQ25A42B and AQ25A44B
Control Panels. Where there are specific instructions or
details relating to the -42B or -44B Control Panels, the
full model number (i.e., AQ25A44B) is used.
—AQ255 refers to all of the AQ25542B, AQ25582B and
AQ25742B Expansion Zoning Panels
—AQ257 refers to the AQ25744B Expansion Zoning
Panel Where there are specific instructions or details,
the full model number (i.e., AQ25744B) is used;
—Control Module refers to the component within an
AQ25A Series Control Panel that performs the master
control operations. See Table 1 on page 2 for specific
models.
—Control Panel refers to an assembled product,
consisting of a transformer, Control Module and Zoning
Module, all contained within an AQ2000 panel
enclosure;
—Expansion Zoning Panel refers to an assembled
product, consisting of a Zoning Module and (if
applicable) a transformer, contained within an AQ2000
panel enclosure. Expansion Zoning Panels are
available in either 4-zone or 8-zone configurations.
—Zoning Module refers to the component within the
AQ25A Series Control Panel that controls zoning
operations.
When Installing this Product…
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a
hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
the application.
3. Installers must be trained, experienced, and licensed
service technicians.
4. Follow local codes for installation and application.
5. After installation is complete, check out the product
operation as printed in these instructions.
WARNING
Risk of electrical shock.
Can cause severe injury, property damage or death.
Disconnect power supply before installation and before
servicing.
Check That You Have All the Necessary
Equipment For a Successful Installation
• AQ2000 Series components
— AQ25A Control Panel
— AQ Expansion Zoning Panels (if more than four space
heating zones in the system)
— Digital thermostats (one for every space heating zone
being controlled)
• Boiler supply and return temperature sensors (included with
the AQ25A Control Panel)
• Outdoor temperature sensor (included with AQ25A Control
Panel)
• Low voltage thermostat wire
• Zoning equipment (zone valves or pumps)
Read All Instructions Carefully Before
Proceeding
The AQ25A Control Panels are a part of a totally new family of
hydronic controls. And although they - and other AQ2000
system components - are very easy to install and operate, they
are different than other hydronic controls that you have
previously installed. Take a moment to read through this quick
installation guide before beginning the installation. Failure to
follow them could damage the product or cause a hazardous
condition.
Familiarize Yourself With the AQ25A Control
Panel Layout
Refer to Fig. 1 on page 4. All AQ25A Control Panels consist of
three functional components:
1. the AQ10X38 transformer (power supply module), which
connects to 120 Vac power and supplies 24 Vac power to
the Control Module and Zoning Modules; and
2. the AQ15A boiler/DHW Control Module, which controls
the boiler and DHW functions as well as coordinating the
overall operation of the hydronic system, and
3. One of two different 4-zone Zoning Modules:
• AQ15740B (part of the AQ25A44B Control Panel)
for zoning with 24 Vac zone valves with end
switches.
• AQ15540B (part of the AQ25A42B Control Panel)
for zoning with either line voltage circulators or 24
Vac zone valves without end switches.
AQ25A Control Panels can control a maximum of 16 zones by
connecting additional Expansion Zoning Panels to the AQ25A
Control Panel. Each Expansion Zoning Panel is configured
with its own bank of DIP switches, located in the left-most
section of each Zoning Module.
