AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS
The AQ2000 Series Expansion Zoning Panels are listed in
Table 1. AQ2000 Series Expansion Zoning Panels.
Application: Controls zoning operations for hydronic zoning
Power and Electrical Ratings:
Power Supply: 120 Vac / 60Hz
B–B Communication Bus Terminals: Low voltage,
Class II, 2-wire polarity-insensitive, digital communicat-
ing link to other Control or Zoning modules
Zone Pump Output Rating: 120 Vac, 5A, 1/3 HP
Zone Valve Output Rating: 24 Vac, 0.5A, 12VA
Electrical Connections (Line Voltage): Wire-clamp
screw terminals; maximum 2 x 14 AWG each on line
Temperature Rating: 32°F to 130°F (0°C to 55°C)
Operating Humidity Range (% RH): 5 to 90% RH,
Sensor Temperature Rating: -58°F to 230°F (-50°C
R–C Input: 24 Vac Class II
R–C Output (on transformer; AQ25742B and
AQ25744B only): 38 VA, 24 Vac Class II
When purchasing replacement and modernization products from your TRADELINE® wholesaler or distributor, refer to the
TRADELINE® Catalog or price sheets for complete ordering number. If you have additional questions, need further information,
or would like to comment on our products or services, please write or phone:
1. Your local Honeywell Environmental and Combustion Controls Sales Office (check white pages of your phone directory).
2. Honeywell Customer Care
1885 Douglas Drive North
Minneapolis, Minnesota 55422-4386
3. http://customer.honeywell.com or http://customer.honeywell.ca
International Sales and Service Offices in all principal cities of the world. Manufacturing in Belgium, Canada, China, Czech
Republic, Germany, Hungary, Italy, Mexico, Netherlands, United Kingdom, and United States.
# of Zoning
Thermostat Compatibility: Digital non-communicating
thermostats and/or AQ1000 Series 2-wire communicating
Dimensions (HxWxD): 8.0 x 9.4 x 3.3 in. (20.3 x 23.8 x
8.5 cm) approximate
Weight: 3.9 lb. (1.8 kg)
Approvals: Canadian Standards Association: Certified, File
NOTES: Throughout these instructions, the following
terminology conventions are used:
— AQ155 refers to the AQ15540B Zoning Module.
— AQ157 refers to the AQ15740B Zoning Module.
— 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
relating to the -42B, -82B, or -44B Expansion Zoning
Panels, the full model number is used
— AQ2000 Series Control Panel is used when the infor-
mation applies to any of the AQ2000 Series Boiler
Control Panels, including AQ25A, AQ250, AQ251,
— Control Module refers to the component within the
AQ2000 Series Control Panel that performs the
master control operations.
— Control Panel refers to an assembled product, con-
sisting of a transformer, Control Module and (if appli-
cable) a Zoning Module, all contained within an
AQ2000 panel enclosure.
— Expansion Zoning Panel refers to an assembled
product, consisting of a Zoning Module and (if applica-
ble) a transformer, contained within an AQ2000 panel
— Zoning Module refers to the component within the
AQ2000 Series Control Panel that controls zoning
operations. Zoning Modules are available in either
4-zone or 8-zone configurations.