• AQ255 for zoning with pumps or zone valves without end switches.
• Auto test function to test zones at system start up. It allows for operator controlled testing of zones; includes pause/restart capability.
• LED lights for visual diagnostic of zone operation.
• Allows zoning with either "Normally Open" or "Normally Closed" zone valves.
• Adjacent zoning panels can operate different zone equipment - one panel may control 4 pumps while another may control 4 zone valves.
• Easily switch from zone valves to pumps with same zoning module - just flip one DIP switch. Ensure correct voltage is applied to all zone equipment on a panel (120 Vac for pumps, 24 Vac for valves)
• R-C transformer and B-B data bus terminal connections (network communication) for easy expansion.
• Zones can be set to energize a group pump via Aux Out dry contacts on main control panel (AQ250, AQ25A, AQ251, AQ252) or expansion control panel (AQ254).
• Zone synchronization through Zone of Greatest Demand control.
• 38 VA Transformer with self resetting electronic fuse.ZONING PANEL FOR 4 PUMPS| Application | Zoning control for hydronic zoning system |
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| User Interface (Setting, Programming) | DIP Switches |
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| Overview | The AQ255 and AQ257 family of AQUATROL Expansion Zoning panels work with AQ2000 Boiler Control Panels and AQ1000 Communicating Thermostats to control up to 4 space heating zones (or 8, for the AQ25582B Panel). Can be combined with additional expansion zon |
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| Number of Zones Controlled | 4 |
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| Thermostat Compatibility | AQ1000 Series 2-wire communicating thermostats and most digital thermostats |
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| R-C Input (on Control and Zoning Modules) | 24 Vac Class II (input on Control and Zoning Modules) |
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| B-B Communication Bus Terminals | Low voltage, Class II, 2-wire polarity-insensitive, digital communicating link to other Control or Zoning modules. |
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| Zone Module Thermostat input | Low voltage, Class II, 2-wire polarity-insensitive, digital communicating with power link to AQ1000 series thermostat. |
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| Zone Output Contact Rating | 120 Vac/250 Vac, 5A, 1/3 HP |
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| Control and Zoning Panel Temperature Rating (F) | 32 F to 130 F |
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| Control and Zoning Panel Temperature Rating (C) | 0 C to 55 C |
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| Dimensions (in.) | 9 1/2 in wide x 8 in. high x 3 3/8 in. deep |
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| Operating Humidity Range (% RH) | 5 to 90% RH, non-condensing |
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| Dimensions (mm) | 24 cm wide x 20.3 cm high x 8.5 cm deep |
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| Type of Zoning Devices Controlled | Zone pumps or 2-wire valves (line voltage) |
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| Electrical Connections (Line Voltage) | Wire-clamp screw terminals, Maximum 2 x 14 AWG each on line voltage terminals |
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| Replacement Parts | AQ15540B 4-zone pump expansion module |
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| Approvals, Canadian Standards Association | CSA C/US Certified to CSA and UL Standards, File No. LR76030 |
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Product Family
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