Honeywell AQ25A Series Technical Reference Booklet page 173

AQ255 and AQ257 Series Expansion
Zoning Panels
PRODUCT DESCRIPTION
The AQ255/AQ257 Series Expansion Zoning Panels provide
additional zoning capacity for an existing hydronic installation
controlled by an AQ2000 Series Boiler Control Panel such as
an AQ250 Relay Boiler Control, an AQ251 Reset Boiler
Control, or an AQ252 Universal Injection/Mixing Boiler Reset
Control.
AQ25742B
AQ25582B
FEATURES
The AQ255/AQ257 Series Expansion Zoning Panels have the
following features:
• Availability of 4 Expansion Zoning Panels.
• Zone control of either pumps or zone valves, in
multiples of 4 zones
• 4-zone or 8-zone models for pump zoning; 4-zone
models for zone valves
• Ability to use both zone valve models and zone pump
models in the same installation
• Zone valve panels contain an AQ10X38 transformer
(power supply module), which connects to 120 Vac
power and supplies 24 Vac power to the Zoning
Module.
• Communications between components via the
AQUATROL® network, using communication bus
wiring.
• Any panel can be configured to activate a group pump
when zones are active
• Zone valve models can be used with Normally Open or
Normally closed valves
• Can be installed up to 500 ft. away from main AQ2000
Control Panel, for convenient operation of remote
zoning equipment
IMPORTANT
To ensure correct installation and proper operation of
the zoning panel, perform the 7 installation steps in
the order numbered in the "Content" below.
Specifications ...................................................................
1 Installation Preparation ..................................................
2 Mounting ........................................................................
3 Wiring Procedure ...........................................................
4 Configure the Expansion Zoning Panel(s) DIP Switches
5 Test and Check Out the Installation ...............................
6 Purge Air from all System and Zone Piping ..................
7 Document and Keep a record of all System Settings ....
Troubleshooting ................................................................ 11
Appendix .......................................................................... 12
Wiring Diagrams ................................................... 12
PRODUCT DATA
Content
2
3
5
5
6
8
9
9
69-1981-03