Description:

Intelligent & Reliable Control for Solar Water Heating Systems

Efficient solar heating relies on precise control to ensure the pump only circulates water when the solar collector is hotter than the storage tank. Without a dedicated differential controller, you risk inefficient operation, wasted energy, and potential damage to your system from freezing or overheating. You need a purpose-built solution that provides intelligent, reliable control.

The Novus N321S NTC Differential Temperature Controller (80321S3012) is a purpose-built instrument designed to optimise the performance of solar heating systems. It utilises two NTC-type temperature sensors (one for the collector and one for the tank) to continuously measure the temperature difference. When the collector is warmer, the controller activates a water circulation pump via a powerful 16 A SPDT relay output, ensuring maximum energy transfer.

Beyond simple differential control, the N321S provides critical safety features. It includes configurable functions to protect the piping from damage due to freezing in winter and to prevent overheating that could harm your system. With a wide power supply range of 100-240 Vac/dc, a bright 3-digit LED display, and robust front-panel protection (IP65), the N321S is a reliable and durable solution for managing your solar heating application.

Key Features & Benefits

• Differential Control for Solar Heating: Specifically designed to manage a water circulation pump based on the temperature difference between a solar collector and a thermal storage tank or swimming pool.
• Dual NTC Sensor Inputs: Comes with two high-accuracy NTC thermistor sensors (10k @ 25C) to provide real-time temperature readings from both the collector and the tank.
• Integrated Safety Functions: Includes configurable anti-freezing and anti-overheating setpoints to protect your system's piping and components from damage.
• High-Power Relay Output: Features a robust 16 A / 1 HP relay (SPDT) to directly control a water circulation pump, eliminating the need for an external contactor in many applications.
• Wide Power Supply Compatibility: Operates on a versatile power supply range of 100 to 240 Vac/dc (10%), making