Durable Construction: Built to withstand industrial-grade thermal cycling in natural gas applications

Multi-Pole Switching: 3-pole design ensures simultaneous control and isolation for three-phase power circuits

making it a reliable solution for technicians requiring precise fluid regulation

heat recovery ventilators

If the furnace is experiencing delayed ignition or the flame rollout switch is tripping

Tekmar Controls 402 Control 328140-751 Durable Construction: Built to withstandThe Tekmar 402 House Control provides precise management for hydronic heating systems, operating on a 24Vac power supply. This versatile tN2 communication hub is engineered to coordinate a single boiler, domestic hot water (DHW) generation, and a setpoint load. It is capable of managing mixing valve control or up to four zone valves directly. The unit supports outdoor reset technology to optimize fuel efficiency by adjusting boiler water temperatures