Specifications
Solar Water Heaters
Competitive price, good quality
5 years warranty
After sales solution
Solar Water Heaters
Model: QAL-SP-20A1
Solar water heaters features,
1. The upright tank can make the water temperature to a high level. It can hot the water instantly.
2. The tank inside the building, the hot water loses less energy than the normal one.
3. The solar collector and the tank of solar water heater is separated, that makes the system combine with the building perfectly, which will reduce the sightseeing for the building and environment around.
4. Back up with electric heater so that in the day without sunshine hot water can also be used.
5. Can be combined with gas or electric heater.
6. Max. Pressure: 12bar; Operating Pressure: 6 bar
7. It can be used for other function, such as warming.
Solar water heaters working principle:
1. The solar collector absorbs solar energy and transmits it to the solar water heater tank through circulation.
2. When the temperature of the collector reaches the set value, the controller starts the circulation pump automatically.
3. The circulation pump makes heat-conducting liquid circulate automatically.
4. The heat-conducting liquid transfers heat to water by lower heat exchanger in the water tank.
5. When the temperature difference between solar collector and heat pipe solar water heaters tank doesn't reach the set value, the circulation pump will be shut automatically.
6. In case the temperature of the water tank does not reach Tmax, Electric Heating Element will start to work automatically
Solar water heaters working station component:
1. Operating screen
2. Manometer
3. Pump speed adjust switches
4. Temperature difference circulation pump
5. Flow rate indicator
6. Return circuit connector
7. Safety valve
8. Expansion vessel connector9. Return circuit connector
10. Wall mounting
11. Expansion vessel:8L
12. Pressure resistance: 10 bar pressure for expansion vessel
Item | Measured value |
| Heat conduction coefficient | >99% |
| Axial heat transition auantity | 0.93-2.49kw/cm² |
| Heat conduction speed | >200mm/s |
| Axial temperature difference | 1-2centi-degree/m |
| Starting temperature | 20centi-degree |
| Starting speed | 2min |
| Working temperature range | 30centi-degree~300centi-degree |
| Resistance to high temperature | No deformation in 48hours under 250C high temp condition |
| Resistance to low temperature | -35C |
| Life | >10years |
| Description | Split pressurized solar water heating system |
| Material of out manifold | 0.55mm thickness color steel/ fluorine carbon steel |
| Material of inner tank | Food grade 1.5 mm thickness SUS304 stainless steel |
| Tank insulating layer | 50 mm 45kg/m³ high-density polyurethane foamed |
| Max pressure | 0.6 Mpa |
| Solar collector tube | 3.3 Borosilicate glass with N/Al coating |
| Thickness of glass tube | 1.6mm |
| Vacuum tube tightness | P≤0.005 Pa |
| Absorption | as=0.93-0.96 (AM1.5) |
| Emission ratio | εh=0.04-0.06 (80C±5C) |
| Idle sunning property parameters | Y=220~260m2.C/KW |
| Average heat loss coefficient | ULT=0.6~0.7W/(m2.C) |
| Bracket: | 2.0mm thickness aluminum alloy |
| Tank capacity | 200L |
| Solar collector | 58x1800x 20 tube solar collector |
| Absorber area | 1.875 m² |
| Heat exchanger length | 15m |
From its early beginnings in 2000 Redao (originally called Alinsidun Technologies) is a designer and manufaturer of solar water heating prodcts in China. All of our products are designed to ensure robust performance over a long lifespan. All Redao products are complied with CE, ISO9001-2008.
With our dedicated and experienced team, our specialised manufacturing base, as well as the continued focus on technical solutions and customer service, we are sure that Redao will remain the supplier of choice for many throughout the coming years.
Redao strives to maximize production outputs and quality using the very lastest in manufacturing techniques, and uses equipment with proven reliability and the flexibility to adapt to fast changing requirements of customers. If you are interested in Redao water heater system, please feel free to call us.
Redao brief profile:
2000>Alinsidun establish, the former name of Redao. Production of solar water heater tank begins.
2001>Alinsidun develop its first solar water heater. Rush production begins.
2002>Alinsidun opened sales and distribution office in Shanghai, China.
2003>Alinsidun was awarded "Observing contract & Valuing Credit Star factory" by Zhejiang Quality Examinations and Appraisal Center.
2004>Export production begins.
2005>Alinsidun observed Good Quality control system by Chinese Product Quality Management center. At the same time, Alinston became the mumber of China Solar water Quality Control System.
2006>Alinsidun was awarded "China Solar Water Heater Most Famous Brand" by China Product Quality Management Center.
2007>Alinsitun complied with the Quality Assurance Requirements of ISO 9001-2000
2011>Redao became the company name instead of Alinston, and Redao solar water heaters complied with CE certification. In Aprial, Redao complied with ISO 9001-2008.
2012>QAL mark registered.
