JOHNSTONE SUPPLY

Description:

• Provides simplified control of residential hydronic systems
• Modular design for installation flexibility — panels connect together and require only six control wires to add on new modules
• Expandable up to 16 zones
• Status LEDs for easy diagnostics
• Extends boiler life and saves energy by minimizing frequent boiler cycling
• Boiler post purge delivers retained heat in the boiler to zones where it can be used
• Periodically activates all valves and pumps to prevent seasonal start-up problems
• Freeze protection feature activates all valves and pumps if communication is lost between the zones and the controller
• Use one L41-828 communicating thermostat per zone
• L87-297, L87-298 and L87-299 have outdoor temperature compensation and customizable 7-day programming

Description: Communicating Thermostat; Mfg. #: AQ1000TN2;