Honeywell AQ25A44B programmable relay boiler control panel for 4 zones of valves with end switches

Product Description

The Honeywell AQ25A44B is a programmable relay boiler control panel designed for sign-temperature residential hydronic heating systems, providing simplified, energy-efficient control. It manages low voltage control modules, zone thermostats, and zone valves with end switches, handling line voltage outputs for boiler pumps, domestic hot water (DHW) pumps, and auxiliary functions. This control panel supports up to four zones, expandable to 64 zones with additional panels, and includes an integral 38 VA transformer.

• Displays outdoor temperature on all Aq1000 series thermostats when used with an aq12c10 outdoor sensor.
• Intuitive and accessible programming interface for zone set points and setback programming.
• Zoning control for up to four zones, expandable to 64 zones with additional panels.

Product Highlights

This programmable boiler control panel offers comprehensive management for hydronic heating systems, featuring multi-zone control, customizable settings, and domestic hot water priority.

Product Information

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: AQ25A44B
• Country of Origin: United States

Technical Specifications

• Manufacturer: Honeywell
• Brand: Honeywell
• Product Type: CONTROLLER
• MPN: AQ25A44B
• Boiler High Limit: Range: 120°F to 225°F (49°C to 107°C), Factory Default: 190°F (88°C)
• Boiler Low Limit: Range: 60°F to 180°F (15°C to 82°C), Factory Default: 150°F
• Boiler Differential: Range: 2°F to 41°F (1°C to 23°C) / AUTO, Factory Default: AUTO
• Warm Weather Shut Down: Range: 35°F to 100°F (2°C to 38°C), Factory Default: 70°F (21°C)
• Minimum Return Temperature: Range: – – / 80°F to 180°F (27°C to 82°C), Factory Default: 140°F (60°C)
• Boiler Cycles Per Hour: Range: 2 to 6, Factory Default: 4
• Boiler Fire Delay: Range: 0 seconds to 3 minutes (in 5 second increments), Factory Default: 10 seconds
• Boiler Purge Time: Range: OFF, 10 seconds to 30 minutes (in 10 second increments), Factory Default: 30 seconds
• Boiler Exercise: Range: YES / NO, Factory Default: YES
• Boiler Freeze Protection: Range: YES / NO, Factory Default: YES
• Boiler 10V Modulation Select: Range: 0-10V / 2-10V, Factory Default: 0-10V
• Boiler Usage: Range: NONE / BOILER, Factory Default: NONE
• DHW Enable/Disable: Range: ENABLE / DISABLE, Factory Default: ENABLE
• DHW Priority: Range: YES / NO, Factory Default: NO
• DHW Priority Override: Range: YES / NO, Factory Default: YES
• DHW Device: Range: PUMP / VALVE, Factory Default: PUMP
• DHW Valve Open Time: Range: 0 – 230 seconds (in 5 second increments), Factory Default: 15 seconds
• DHW Purge: Range: YES / NO, Factory Default: YES
• DHW Sensor: Range: YES / NO, Factory Default: NO
• DHW Setpoint: Range: 60°F to 160°F (16°C to 71°C), Factory Default: 140°F (60°C)
• DHW Differential: Range: 5°F to 40°F (2.5°C to 22°C), Factory Default: 20°F (-7°C)
• DHW Vacancy: Range: [41°F + DHW DIFF] to 160°F ([5°C + DHW DIFF] to 71°C), Factory Default: 45°F (7°C)
• Zoning Heat Demand Priority: Range: YES / NO, Factory Default: NO
• Zoning Priority Override: Range: YES / NO, Factory Default: NO
• Zoning Valves Time To Open: Range: 5 – 230 seconds, Factory Default: 15 seconds
• Auxiliary Input (optional): Range: SETBACK / VACANCY / EM. SHUT / NONE, Factory Default: SETBACK
• Auxiliary Output (optional): Range: BOILER / SETBACK / ZONE OP. / ALARM / AUX.IN / DHW IN / HEAT IN / HT DMND / COOL / NONE, Factory Default: BOILER
• Auxiliary Pump (optional): Range: BOILER / GROUP / OCC / BYPASS / FAN / NONE / AUX.IN / DHW IN / HEAT IN / HT DMND, Factory Default: BOILER
• A/C Cycles Per Hour: Range: 2 / 3 / 4 / 5 / 6, Factory Default: 4
• A/C Minimum Off Time: Range: 2 to 10 minutes, Factory Default: 5M
• A/C Cool Weather Shut Down: Range: 32°F to 100°F (0°C to 38°C), Factory Default: 65°F (18°C)
• A/C Fan Mode: Range: AUTO / ON, Factory Default: AUTO
• A/C Equipment Configuration: Range: A-1 to D-16, Factory Default: A-1
• A/C Unit: Range: NONE / 1, Factory Default: 1
• A/C Cooling: Range: ENABLE / DISABLE, Factory Default: ENABLE