910024CC Solar Thermostatic Connection Kit

• EN1111 and EN1287 certified – Dual certification to the primary European standards for thermostatic mixing valves confirms the mixing valve component meets established performance requirements for temperature control accuracy, fail-safe behavior, and construction quality. EN1111 covers mains-pressure sanitary applications up to 10 Bar; EN1287 specifically addresses low-pressure and storage heater applications including solar thermal systems
• Integrated reversing valve and mixing valve in one kit – The 910024CC combines solar source switching and hot water temperature blending in a single pre-assembled assembly, eliminating the need to separately specify, source, and connect a diverting valve and a mixing valve. This reduces the number of installation connections, simplifies commissioning, and removes the risk of compatibility errors between separately selected components
• Automatic solar-to-boiler switchover at 45°C – The thermostatic reversing valve switches the hot supply source from solar to boiler when solar storage temperature drops below 45°C, and returns to solar supply when temperature recovers above 45°C. This switchover is fully mechanical and automatic, requiring no electrical controller, motorized actuator, or manual adjustment
• Maximizes solar energy utilization at partial temperatures – Rather than bypassing solar below a fixed cutoff, the reversing valve routes solar-heated water to the mixing valve even at lower storage temperatures, blending it with cold water to reach the 45°C outlet set point. This extends effective solar utilization hours and reduces the frequency of boiler engagement
• 100°C maximum inlet temperature tolerance – The kit handles hot inlet temperatures up to 100°C, accommodating the peak and near-stagnation output of evacuated tube collectors without requiring a separate upstream temperature limiting device under normal operating conditions
• ±2°C control accuracy at 45°C outlet – The thermostatic mixing valve maintains the mixed outlet at 45°C within a ±2°C tolerance, providing a consistent and safe delivery temperature to sanitary fixtures and hot water distribution pipework regardless of fluctuations in solar storage or boiler supply temperature
• 10 Bar static pressure rating – The 10 Bar maximum static pressure rating covers both mains-pressure domestic installations and higher-pressure commercial solar thermal systems, providing installation flexibility across a wide range of building types and supply configurations
• Brass and ABS construction – The brass valve body provides durability and resistance to the elevated temperature and pressure conditions of solar thermal circuits. The ABS cover protects the adjustment mechanism and provides thermal separation from the hot valve body during manual setting

• Residential solar water heating with boiler backup – The primary application for the 910024CC is a domestic solar thermal system paired with a gas or electric boiler. The reversing valve manages the handover between solar and boiler supply based on storage temperature, providing fully automated hot water management without a separate controller or motorized zone valve
• Evacuated tube and flat-plate solar collector systems – The 100°C maximum inlet temperature rating makes the 910024CC compatible with both flat-plate and evacuated tube collectors, including high-efficiency evacuated tube systems that produce high storage temperatures during peak solar irradiance
• Electric storage water heater with solar preheat – In systems where a solar preheat circuit feeds an electric storage tank, the 910024CC manages the transition between solar preheat and electric backup, maximizing use of solar-heated water and reducing the frequency of electric element activation
• Sanitary hot water distribution – The mixing valve delivers a controlled 45°C supply to domestic hot water distribution pipework, suitable for showers, baths, and handwashing facilities where a consistent and safe delivery temperature is required at the point of use
• Heating and cooling system connections – In low-temperature hydronic heating circuits fed from a solar thermal source, the 910024CC manages both supply source selection and outlet temperature limiting, delivering solar-heated water to underfloor heating or fan coil circuits at a controlled circuit temperature
• Commercial solar thermal installations – Hotels, sports facilities, and commercial buildings with solar thermal arrays and boiler backup where automated source prioritization and safe delivery temperature are required in a compact, pre-assembled valve assembly

• The 910024CC is a two-component kit. Connect the thermostatic reversing valve between the solar storage tank outlet, the boiler outlet, and the cold water supply. The thermostatic mixing valve installs downstream and blends the selected hot supply with cold water to deliver the 45°C mixed outlet to distribution
• The reversing valve switches from solar to boiler supply when solar storage temperature drops below 45°C and returns to solar when temperature recovers above 45°C. This function is fully mechanical and requires no external controller, sensor, or electrical connection
• Maintain a minimum flow rate of 4 L/min through the mixing valve during operation. Below this threshold, the thermostatic element cannot accurately sense the mixed outlet temperature, causing temperature instability at the outlet
• Do not exceed 5 Bar differential pressure between hot and cold inlets. If supply pressure difference exceeds this limit, install a pressure-reducing valve on the higher-pressure supply upstream of the kit
• Do not expose the kit to inlet temperatures above 100°C. If the solar system is capable of producing stagnation temperatures above 100°C, install an overheat protection device upstream of the 910024CC to protect the thermostatic cartridge and body seals
• Connect all ports according to the flow direction markings on the valve body. Verify the solar inlet, boiler inlet, cold water inlet, and mixed outlet connections before tightening. Refer to the installation diagrams in the user manual for the correct piping configuration for both operating modes (solar above 45°C and solar below 45°C)
• After installation, commission by confirming automatic switchover behavior: with solar storage above 45°C, verify the solar circuit supplies the mixing valve; with solar storage below 45°C, verify the boiler circuit engages. Measure the mixed outlet temperature at the nearest fixture with a calibrated thermometer before putting the system into service

Legom supports OEM and ODM services for the 910024CC Solar Thermostatic Connection Kit. Customization options include mixing water temperature range, pressure rating, connection size, and body configuration. Custom material specifications and performance standard adaptations are available for specific market requirements. All customization projects are developed with the Legom engineering team to confirm suitability for the intended application. Contact us via WhatsApp or info@legomsmart.com.