HONEYWELL AQ2554P2X Aquatrol Zoning Panel for 4 Zone Pumps. Zone expansion panel works with AQ1000 communicating thermostat to add up to 4 zones with pumps or valves to AQ2000 Series Boiler Control Panels.

Features:

• R-C transformer and B-B data bus terminal for easy expansion

• Status LCDs for easy diagnostics

• Use with 2-wire “polarity insensitive” communicating thermostats

• Replacement Parts: AQ1554P2 4-zone pump expansion module.