SR501 Solar Controller-Intelligent Control for Efficient Solar Water Heating

The SR501 Solar Controller intelligently manages un-pressurized solar water heaters with precise temperature control, anti-freezing protection, timed water loading, and safety features for reliable, efficient operation.

SR501 Solar Controller for Solar Water Heaters Introduction:

The SR501 is a high-performance micro-computer automatic controller designed for integrated un-pressurized solar thermal systems. Developed with the latest NEC microcontroller, it delivers intelligent, precise control, ensuring optimal performance in cold, hot, and humid environments.

Featuring a dedicated clock chip for accurate timekeeping and an LCD display, the SR501 combines reliable operation, elegant design, and easy installation, making it the ideal companion for solar water heaters.

How the SR501 Solar Controller Works:

The SR501 Solar Controller intelligently manages un-pressurized solar water heaters. It monitors tank and collector temperatures, controls water loading, and operates the heating element to maintain a constant temperature. The controller provides safety features including anti-freezing, high-temperature, overflow, and low-pressure protection. It also supports water recirculation, thermal disinfection, and alerts users with beeper warnings and error codes. With its precise control and smart functions, the SR501 ensures efficient, safe, and reliable hot water supply.

SR501 Main Technical Data:

Dimensions: 205 × 150 × 50 mm
Power Supply: AC 100–240V, 50Hz
Temperature Measuring Accuracy: ±2℃
Tank Temperature Measuring Range: 0–99℃
Temperature Control Accuracy: ±2℃
Power for Water Loading: ≤200W
Power for Self-Heating Cable: ≤600W
Power for Heating Element: ≤1500W / 3000W (two models available)
Electromagnetic Valve: DC12V / AC220V (Optional pressure valve and low-pressure valve)
Pressure Valve Working Pressure: 0.02–0.8 MPa (for direct water supply)
Low-Pressure Valve Working Pressure: 0 MPa (for water supply from tank or low-pressure systems)

SR501 Solar Controller Key Functions:

Clock setting
Timing control for water loading and backup heating (three preset time sections)
Temperature-controlled water loading
Constant Temperature Heating (CTH)
Low Water Pressure Protection (LWPR)
Constant Water Level Filling (CWL)
Water Filling Pump (PUMP)
Recirculation by temperature/flow within three time-sections (TCYC)
Automatic Thermostat Function (AH)
Three Time-Section Settings (OTF)
Tank High-Temperature Protection (TKPR)
Tank Anti-Freezing Protection (CFR)
Preset Water Level for Low Tank Water (LWS)
Run-on Time for Low Tank Water (LWSD)
Thermal Disinfection (OTDI)
Celsius/Fahrenheit Unit Switch (UNIT)
Error Warning Beeper (BEEP)
Manual Water Filling
Compulsory Water Filling Function
Manual Heating
Manual Domestic Hot Water (DHW) Circulation
Factory Reset
Water Level & Temperature Sensor Sensitivity Adjustment
Pipe Anti-Freezing Protection
Measurement of Valve Status
Overflow Protection
High Temperature Protection for Collector Tubes
Memory Protection
Screen Protection
Trouble Protection
Error Code Display & Description

FAQs

Q1: What types of solar water heaters can the SR501 controller work with?

A1: The SR501 is designed for integrated un-pressurized solar water heating systems, providing intelligent control and safety functions.

Q2: How does the SR501 ensure safe operation?

A2: It offers anti-freezing, high-temperature, overflow, and low-pressure protection, plus alerts via beeper warnings and error codes.

Q3: Can I schedule water heating with the SR501?

A3: Yes, it supports timed water loading, backup heating, and recirculation for efficient hot water management.

Solar Controller SR501 User Manual