Description

The N321S is a specialised version of the standard controller designed specifically for Solar Water Heating applications. While a standard N321 looks at one temperature and has one set points, the N321S is a differential controller that compares two different sensors (usually labelled T1 and T2). The single SPDT (Max 250vAC @ 16A)  relay can be used to activate the pump when the solar collector is significantly hotter than the water in the tank. This ensures that the hot water in the storage tank is not replaced by colder water from the solar collector on cloudy days.

Specifications

• IP65 enclosure frontal protection when installed. Behind panel, IP42.
• Outputs: 1 x SPDT Relay for 250vAC @ 16A
• Working temperature: 0 to 40°C @ 20 to 85%RH.
• Power supply: 100-240vAC or 24vDC
• Dimensions: 75 x 33 x 75mm (Width x Height x Depth)
• Panel Cut Out: 70 x 29mm
• Weight: 100g