CSA Certified|ICES and FCC Part 15

• Only requires 2 Wires Per Zone, Four 115 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, DHW control DHW priority (optional), setpoint operation Expandable up to 48 zones, single on/off, two stage, or modulating boiler control Variable speed, floating action, or proportional mixing control, automatic boiler differential Exercising, boiler protection

The tekmarNet® 2 House Control 403 is designed to operate all of the mechanical equipment in a residential hydronic heating system, coordinating their operation through network communication. It can be used in applications ranging from a single zone of baseboard with an on/off boiler, to multiple fan coils, mixed radiant floor heating zones, and a modulating/condensing boiler. This control regulates up to two heating water temperatures through Outdoor Temperature Reset and Indoor Temperature Feedback. It is capable of controlling a single on/off, two stage, or modulating boiler, a mixing device, Domestic Hot Water, setpoint loads, 4 on-board zone pumps, and can expand up to 24 zones in total for each space heating water temperature.