• Controls up to 2 stages of heat from a single thermostat.
• Use with AQ1000 2-wire communicating thermostats, or most dry contact digital thermostats.
• Zoning Control for up to 4 zones as shipped; can be expanded to a total of 16 zones with AQ255 or AQ257 expansion zoning panels and up to 64 zones when used with AQ254 Add-A-Temp panels.
• Line or low-voltage output for zoning equipment (pumps or valves).
• Zone synchronization through Zone or Greatest Demand control.
• Domestic hot water priority and priority override protection.
• Boiler short cycling protection.
• Boiler post purge.
• Freeze protection.
• Pump/valve exercise.
• Boiler shock prevention from cold water returning to boiler.
• Automated test feature for quick start-up and simplified troubleshooting.
• Integral 38 VA transformer with self-resetting electronic fuse.BOILER CONTROLLER WITH DHW PRIORITY FOR 4 ZONES OF PUMPS OR 2-WIRE VALVES| Application | Boiler control for zoned hydronic systems |
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| User Interface (Setting, Programming) | DIP Switches |
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| Overview | The AQ250 family of AQUATROL Boiler Controls provides simplified, energy-efficient control of single temperature, residential hydronic heating systems. The AQ250 easily converts a single zone heating system into a room-by-room comfort control system, or u |
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| Number of Zones Controlled | 4 |
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| Boiler Heat Post Purge | 30 seconds (sent to DHW tank or Zone of Greatest Demand - selectable) |
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| Pump/Valve exercise | 30 seconds per 2 weeks of space heating inactivity |
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| Thermostat Compatibility | AQ1000 Series 2-wire communicating thermostats and most digital thermostats |
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| R-C Output (on transformer) | 38 VA, 24 Vac Class II |
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| R-C Input (on Control and Zoning Modules) | 24 Vac Class II |
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| Supply/Return Sensor | Lead Length: 10 ft. (3050 mm). 10 kilohm NTC thermistor at 25 C (77 F) ±0.5F (±0.3C) up to 500 ft (150 M) using 18 AWG or larger wire |
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| Heat Demand (Thermostat R-W) Input | External dry contacts connection only |
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| DHW Demand Input | External dry contacts connection only |
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| ZR-ZC Contact Rating | 120 to 240 Vac, 1/3 HP |
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| Boiler (T-T) Output Rating | 24 Vac, 0.5A, 12VA |
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| B-B Communication Bus Terminals | Low voltage, Class II, 2-wire polarity-insensitive, digital communicating link to other Control or Zoning modules. |
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| Zone Module Thermostat input | Low voltage, Class II, 2-wire polarity-insensitive, digital communicating with power link to AQ1000 series thermostat. |
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| Boiler Pump Output Rating | 120 Vac/250 Vac 5A, 1/3HP |
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| DHW Pump/Valve Output Rating | 120 Vac/250 Vac 5A, 1/3HP |
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| Auxiliary Pump Output Rating | Dry contact output, 120 Vac/250 Vac 5A, 1/3 HP |
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| Zone Output Contact Rating | Valves: 24 Vac, 0.5 A, 12 VA |
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| Control and Zoning Panel Temperature Rating (F) | 32 F to 130 F |
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| Control and Zoning Panel Temperature Rating (C) | 0 C to 55 C |
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| Sensor Temperature Rating (F) | -58 F to +230 F |
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| Sensor Temperature Rating (C) | -50 C to +110 C |
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| Dimensions (in.) | 13 in wide x 8 in. high x 3 3/8 in deep |
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| Operating Humidity Range (% RH) | 5 to 90% RH, non-condensing |
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| Dimensions (mm) | 33 cm wide x 20.3 cm high x 8.5 cm deep |
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| Type of Zoning Devices Controlled | Zone pumps or 2-wire valves (line voltage) |
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| Electrical Connections (Line Voltage) | Wire-clamp screw terminals, Maximum 2 x 14 AWG each on line voltage terminals |
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| Outdoor Sensor | Lead Length: 10 ft. (3050 mm). 10 kilohm NTC thermistor at 25 C (77 F) +/- 0.5F (+/-0.3C) up to 500 ft (150 M) using 18 AWG or larger wire, beta=3892. |
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| Replacement Parts | AQ15000B boiler control module |
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| Approvals, Canadian Standards Association | CSA C/US Certified to CSA and UL Standards, File No. LR76030 |
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Product Family
All orders are shipped same-day if the order is received by 1:00 PM Central Time. We ship worldwide.
UPS Hoilday Delivery Schedule
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For more informatrion about Warranty visit Warranty page.
You can also find answers to some common questions on our FAQ page
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