Product: Aquatrol Boiler Control Panel for 4 Zones of Pumps or 2 Wire Valves
Manufacturer: Honeywell
Part Number: AQ2504B2
Weight: 6.45
Price: 204.95
Special: Free Shipping on Orders Over 0
Description: 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 upgrades a basic, relay-logic zoning system to intelligent Zone of Greatest Demand control for increased energy efficiency with reduced boiler cycling. AQ250 boiler controls can ensure ample supply of hot water for both space heating and priority generation of domestic hot water for bathing, dishes and laundry. Features 1- or 2-stage zoning 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 CSA C/US Certified to CSA and UL Standards, File No. LR76030
Specifications Application: Boiler control for zoned hydronic systems Thermostat Compatibility: AQ1000 Series 2-wire communicating thermostats and most digital thermostats User Interface (Setting, Programming): DIP Switches Number of Communicating Zones Controlled: 4 Boiler Heat Post Purge: 30 seconds (sent to DHW tank or Zone of Greatest Demand – selectable) Pump/Valve exercise: 30 seconds per 2 weeks of space heating inactivity Power Supply: 120V/60Hz R-C Output (on transformer): 38 VA, 24 Vac Class II R-C Input (on Control and Zoning Modules): 24 Vac Class II 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, beta=3892. Heat Demand (Thermostat R-W) Input: External dry contacts connection only DHW Demand Input: External dry contacts connection only Boiler (T-T) Output Rating: 24 Vac, 0.5A, 12VA B-B Communication Bus Terminals: Low voltage, Class II, 2-wire polarity-insensitive, digital communicating link to other Control or Zoning modules. Zone Module Thermostat input: Low voltage, Class II, 2-wire polarity-insensitive, digital communicating with power link to AQ1000 series thermostat. ZR-ZC Contact Rating: 120 to 240 Vac, 1/3 HP Zone Output Contact Rating: Pumps: 120 Vac/250 Vac, 5A, 1/3 HP Control and Zoning Panel Temperature Rating (F): 32 F to 130 F Operating Humidity Range (% RH): 5 to 90% RH, non-condensing Dimensions (in.): 13 in wide x 8 in. high x 3 3/8 in deep Type of Zoning Devices Controlled: Zone pumps or 2-wire valves (line voltage) Electrical Connections (Line Voltage): Wire-clamp screw terminals, Maximum 2 x 14 AWG each on line voltage terminals 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.
