Honeywell AQ25742B/U 1079020

Honeywell AQ257 expansion zoning panels work with AQ2000 boiler control panels and AQ1000 communication thermostats to control up to four space heating zones. Combine with extra expansion panels and AQ2000 panel for 16 space heating zones.

Honeywell Zoning Expansion Panel, Series: AQ257, 120/250 VAC, 0.5 A, 12 VA VA Rating, 60 Hz, 4 Zones, 32 to 130 deg F, 9-1/2 in W x 8 in H x 3-3/8 in D

• For zoning with zone valves with end switches
• LED lights for visual diagnostic of zone operation
• Adjacent zoning panels can operate different zone equipment
• Easily switch from zone valves to pumps with same zoning module
• R-C transformer and B-B data bus terminal connections for easy expansion
• Zones can be set to energize a group pump via Aux Out dry contacts on main control panel or expansion control panel
• Zone synchronization through zone of greatest demand control
• Tradeline value
• AQ1000 Series 2-wire communicating thermostats and most digital thermostats thermostat compatibility
• DIP switches user interface
• 2-wire valve (24 VAC) zoning devices controlled
• 24 VAC Class II (input on control and zoning modules) R-C input (on control and zoning modules)
• Low voltage, Class II, two-wire polarity-insensitive, digital communicating link to other control or zoning modules B-B communication bus terminals
• Low voltage, Class II, two-wire polarity-insensitive, digital communicating with power link to AQ1000 Series thermostat zone module thermostat input
• Wire-clamp screw terminals, maximum 2 x 14 AWG each on line voltage terminals electrical connections
• 5 to 90% RH, non-condensing operating humidity range
• AQ10X38 24 VAC 38 V-A transformer,AQ15540B 4-zone pump expansion module replacement parts
• Ability to use both zone valve models and zone pump models in the same installation
• Communications between components via the AQUATROL network, using communication bus wiring
• Any panel can be configured to activate a group pump when zones are active

• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/Honeywell_AQ25742B_U_Manual.pdf
• Specification Sheet https://assets.unilogcorp.com/267/ITEM/DOC/Honeywell_AQ25742B_U_Specification_Sheet.pdf