Resideo - Honeywell Home AQ25042B Pump/Zone Valve Relay Control Panel

AQ25042B Pump/Zone Valve Relay Control Panel from Resideo/Honeywell Home provides robust, 4-zone control for residential hydronic zoning systems. This DIP-switch panel supports domestic hot water priority and boiler short cycling protection to improve efficiency and reliability.

Designed for 120 VAC input at 60 Hz, the panel fits a compact 13" W x 8" H x 3-3/8" D enclosure and is suitable for modern radiant and baseboard setups. The system uses 24 VAC Class II low-voltage control with an R-C output of 38 VA and convenient 2 x 14 AWG line-voltage terminals.

Built to UL and CSA standards, it handles hot water media across a wide temperature range (panel 32–130°F; sensor −58 to 230°F), with features like Priority Override Protection and Boiler Short Cycling Protection to extend boiler life.

• 4-zone pump/valve relay control for efficient zoning
• Domestic Hot Water Priority with Priority Override Protection
• Boiler Short Cycling Protection to safeguard equipment
• UL/CSA listed for safety and compliance
• Input: 120 VAC, 60 Hz power; 24 VAC Class II control
• Enclosure: 13" W x 8" H x 3-3/8" D
• Terminations: 2 × 14 AWG line-voltage terminals