1: Collector Array, Storage Tank, Pump, and Auxiliary Heating Description: The solar circuit pump (R1) activates when the switch-on temperature difference (Ton) between the collector array (T1) and the storage tank (T2) is achieved. Conversely, if the temperature difference falls below the switch-off temperature difference (Toff), or if the storage tank (T3) reaches its preset maximum temperature, the solar circuit pump (R1) ceases operation. Auxiliary heating via a backup boiler is detailed in paragraph 4.3: During the designated timeframe for backup heating, if the temperature T3 falls below the switch-on temperature, the circulation pump (H1) for backup heating is triggered. Once T3 reaches the switch-off temperature, the backup heating circulation pump (H1) is deactivated.
Main Technical Data: Specification for SR868C8Q and SR868C8
Controller Appearance: Compact and uniform dimensions of 120mm×120mm×18mm for both models.
Power Supply: Reliable AC230V±10% across all units.
Power Consumption: Ultra-efficient usage with consumption under 3W.
Temperature Accuracy: High precision with an accuracy of ±2°C, ensuring reliable performance.
Measuring Range Specifications:
Collector Temperature Range: Versatile operation from -10°C to 220°C, adaptable to various conditions.
Temperature Measuring Details:
Tank Temperature Range: Nicely accommodates from 0°C to 110°C, suitable for a wide range of applications.
Temperature Measuring Parameters:
Suitable Power for Pumps: Capable of handling up to three pumps, with a combined power of ≤600W.
Suitable Power for Power: Accommodates total power consumption up to ≤1500W, ensuring robust performance.
Electrical Heater Specifications:
Inputs: Includes 2PCS x PT1000 sensors for precise measurements (with capability to handle ≤500°C) and 1 additional PT1000 sensor (≤500°C).
For Collector: Designed with silicon cable handling up to ≤280°C, ensuring durability and safety.
Includes 3PCS x NTC10K, B3950 sensors for comprehensive monitoring, and 2 additional NTC10K, B3950 sensors for redundancy.
Capable of measuring up to ≤135°C for tanks, with PVC cable supporting up to ≤105°C.
Outputs: Equipped with 3 robust relays, tailored for efficient operation of circulation pumps.
Also includes 3-way electromagnetic valve options for versatile functionality.
Features 1 relay specifically for controlling the electrical heater, enhancing heating efficiency.
Ambient Temperature Range: Suitable for environments ranging from -10°C to 50°C, providing flexibility in operation.
Waterproof Grade: Assured protection with IP40 rating, safeguarding internal components against moisture.
Main Functions:
1. Main Menu DT O & DT F: Expertly manages temperature difference functions for optimal efficiency.
2. Main Menu-THET: Facilitates precise timing of heating operations, maximizing energy use.
3. TEMP Temperature Main Menu: Offers comprehensive temperature control for diverse applications.
4. EM Emergency Collector Temperature: Safety-focused emergency switch-off for the collector.
5. CMX Maximum Limited Collector Temperature: Implements collector cooling function to prevent overheating.
6. CMN Low Temperature Protection: Actively safeguards collector from damage due to low temperatures.
7. CFR Frost Protection: Provides essential frost protection for the collector, extending lifespan.
8. SMX Maximum Tank Temperature: Ensures protection with a maximum temperature limit for tanks.
9. REC Tank Re-cooling Function: Enhances efficiency by re-cooling tanks as necessary.
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