The tekmarNet® 2 House Control 400 is designed to operate all of the mechanical equipment in a residential hydronic heating system, coordinating their operation with network communication. It can be used in applications ranging from a single zone of baseboard with an on/off boiler, to multiple radiant floor zones with a modulating/condensing boiler. This control regulates one space heating water temperature through Outdoor Temperature Reset and Indoor Temperature Feedback. It is capable of controlling a single on/off, two stage, or modulating boiler, Domestic Hot Water, setpoint loads, 4 on-board zone valves, and can expand up to 24 zones in total.

• Only requires 2 Wires Per Zone, Four 24 V (ac) powered zone outputs
• For use with tekmarNet® 2 thermostats only, tN4 expansion terminals
• Outdoor temperature reset, indoor temperature feedback
• Warm weather shut down, zone synchronization
• DHW post purge, single on/off, two stage, or modulating boiler control
• DHW control, DHW priority (optional)
• Setpoint operation, automatic boiler differential
• Exercising, boiler protection
• Powered pump outputs, System Setback (with optional Timer)