Honeywell AQ25A Series Technical Reference Booklet page 289

Control Panels
– Multi-Zone Systems
AQ250 Relay Control Panels
Zoning Control For Up To 4 Zones:
• Line or low-voltage output
• 1-stage zoning
• Controls pumps or zone valves
• Expandable to 16 zones; plus up to 64 zones by using AQ254 panels
Loaded With Standard Features:
• Use with AQ1000 2-wire "polarity insensitive" communicating thermostats
• Zone synchronization
• Boiler post purge and boiler short cycling protection
• Freeze protection
• Pump/valve exercise
• Domestic hot water priority (override) protection
• Heat demand priority and priority override
• Automated test feature for quick start-up and simple troubleshooting
Model Number Application
AQ2504B2
AQ2504B4
AQ25A Relay "Plus" Control Panels
All The Great Features Of AQ250 Controls, Plus:
• 1 zone of A/C when used with a AQ1000TP2 thermostat
• Customizable control settings and schedules allow for greater level of
control and comfort
• Armchair programmable (can be programmed at your desk and taken to
the jobsite ready to install)
• Allows outdoor temperature to be displayed on all thermostats
• Central set-back schedules (wake, leave, return and sleep) available
• Automated purge feature for quick system commissioning
• Lots of valuable diagnostic information to help with troubleshooting
• Data logging of relay activity – ideal for logging run time of all zones and
boilers in a system
Model Number Application
AQ25A4B2
AQ25A4B4
AQ251 Reset Control Panels
All the Great Features of the AQ25A, Plus:
• Outdoor temperature compensation boiler reset
• Load adaptive boiler reset
Model Number Application
AQ2514B2
AQ2514B4
For pumps or zone valves w/o end switches
For valves with end switches
For pumps or zone valves w/o end switches
For zone valves with end switches
For pumps or zone valves w/o end switches
For zone valves with end switches
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