Aquatrol� zoning panel for four zone pumps or 2-wire valves. Overview Honeywell AQ255 AQUATROl expansion zoning panels work with AQ2000 boiler control panels and AQ1000 communicating thermostats to control up to four space heating zones, up to 16 zones with additional panels. Features Features AQ255 for zoning with pumps or zone valves without end switches Auto test function tests zones at system start up and allows for operator controlled testing of zones LED lights offer visual diagnostics 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 (network communication) for easy expansion Zones can energize a group pump via Aux Out dry contacts Zone synchronization through Zone of Greatest Demand control Product Specifications Application Zoning control for hydronic zoning system Dimensions (in.) 9 1/2 in wide x 8 in. high x 3 3/8 in. deep Dimensions (mm) 24 cm wide x 20.3 cm high x 8.5 cm deep Weight (lb) 2.1 lbs Weight (kg) 1 kg Approvals, Canadian Standards Association CSA C/US Certified to CSA and UL Standards, File No. LR76030 Tradeline Value Tradeline Thermostat Compatibility AQ1000 Series 2-wire communicating thermostats and most digital thermostats User Interface DIP Switches Number of Zones 4 Zoning Devices Controlled Zone pumps or 2-wire valves (line voltage) R-C Input (on Control and Zoning Modules) 24 Vac Class II (input on Control and Zoning Modules) 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. Zone Output Contact Rating 120 Vac/250 Vac, 5A, 1/3 HP Electrical Connections Wire-clamp screw terminals, Maximum 2 x 14 AWG each on line voltage terminals Operating Humidity Range (% RH) 5 to 90% RH, non-condensing Replacement Parts AQ15540B 4-zone pump expansion module Temperature Ratings (C) Panel--0 C to 55 C Temperature Ratings (F) Panel--32 F to 130 F