• Use with AQ1000 2-wire communicating thermostats or most digital dry contact thermostats.
• Controls one boiler loop and one mixed temperature loop. 
• Use of variable speed injection pump or motorized mixing valve for mixed temperature loop control. 
• 0-10 Vdc modulating output for driving a modulating/condensing boiler or a modulating mixing valve. 
• Displays of outdoor temperature on all AQ1000 thermostats when used with an AQ12C10 outdoor sensor (included). 
• Intuitive programming interface and armchair programming (can be programmed at your desk and taken to the job site "ready-to-install") 
• Customizable control settings and schedules allow for greater level of control and comfort. 
• Central programming of set points and setback.
• Controls up to 2 stages of heat from a single thermostat. 
• Zoning Control for up to four zones as shipped; can be expanded to a total of 16 zones with AQ255 or AQ257 expansion zoning panels, and up to 64 zones by using AQ254 Add-a-Temperature expansion panels. 
• Outdoor temperature compensation (reset), or Load reset based on indoor temperature feedback. 
• Zone synchronization through Zone of Greatest Demand control. 
• Domestic hot water priority and priority override protection. 
• Line or low-voltage output for zoning equipment (pumps or valves). 
• Boiler short cycling protection. 
• Boiler post purge. 
• Freeze protection. 
• Pump/valve exercise. 
• Boiler shock prevention from cold water returning to boiler. 
• Automated test and purge feature for quick start-up and simplified troubleshooting. 
• Integral 38 VA transformer with self resetting electronic fuse. 
• 2 hour power supply (super capacitor) to retain day and time settings during power outage. 
• Non-volatile EPROM memory retains program settings during power outage.

Specifications