Honeywell AQ25042B Aquatrol Boiler Control Panel

Product Features

• Use with AQ1000 two-wire communicating thermostats, or most dry contact digital thermostats
• Offers zoning control for up to four zones and controls up to two stages of heat from a single thermostat
• Can expand up to 16 zones with AQ255 or AQ257 or up to 64 zones with AQ254 Add-A-Temp panels
• Line or low-voltage output for zoning equipment, including pumps or valves
• Features zone synchronization through the zone or Greatest Demand control
• Includes domestic hot water priority, priority override protection and boiler short cycling protection
• Automated test feature for quick start-up and simplified troublshooting