Solahart 181CS13C
The Solahart 181CS13C offers a compact, high-performance solar hot water system for smaller households. Closed-circuit thermosiphon technology provides enhanced protection against corrosion, making it perfect for areas with harsh water conditions.
Solahart 181CS13C Solar Water Heater: Key Attributes
Why the 181CS13C system is a smart choice
The Solahart 181CS13C is designed for smaller households (1-2 people) and provides reliable hot water year-round. The 180-Litre capacity tank is ideal for homes with lower hot water demand. Using closed-circuit thermosiphon technology, this system offers enhanced protection against corrosion, making it suitable for harsh water conditions. The system includes a TRV valve for safe pressure relief, and the Super Shield Enamel® coating ensures long-lasting durability. The CS13C Series offers excellent energy savings while reducing your carbon footprint.
Key Features:
- Capacity: 180-Litre tank, ideal for small households (1-2 people).
- Closed Circuit Thermosiphon: Corrosion-resistant solar-powered water heating.
- TRV Valve: Provides safe pressure relief for smooth operation.
- Super Shield Enamel: Protection against corrosion for durability.
- Energy Efficient: Save up to 75% on water heating costs.#
- Reduced CO2 Emissions: Save up to 2.3 tonnes of CO2 annually.#
Warranty:
- 10-year warranty on the collector and tank.*
- 5-year warranty on parts and labour.*
Collectors:
- 1 x CS13C Collector - provides higher performance in low to medium solar gain areas.
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Specifications
Thermosiphon CS13C Closed Circuit Systems System Model 181CS13C Tank Model (J) 180 Storage Capacity (litres) 180 Boost Capacity (litres) 90 Weight Empty Tank Only (kg) 69 Weight Full Tank Only (kg) 249 A-Width* Tank Only (m) 1.62 Weight Empty System (kg) 124 Weight Full System (kg) 317 A-Width* System (m) 1.62 Collectors CSA2013 Aperture Area (m2) 1.88 Length (mm) 1996 Width (mm) 1043 Height (mm) 82 Capacity (litres) 1.9 Weight Emtpy (kg) 37 Weight Full (kg) 39 Working Pressure - No OTP 80 kPa Working Pressure - With OTP 170 kPa Absorber Surface SCA2000 Blue Tinox sputtered selective surface Absorber/Riser Material copper Number of Risers 13 Frame Material extruded aluminium Insulation Material - Base 38 mm glass wool blanket Glass 3.2 mm tempered low iron Water Supply TPR Valve Setting 1000 kPa ECV* Setting 850 kPa Max. Supply Pressure With ECV 680 kPa Max. Supply Pressure Without ECV 800 kPa Water Connections Cold Rp 3/4 Water Connections Hot R 1/2 Electric Boost Specifications Heating Unit Type Copper sheath immersion element Supply Voltage 220 V - 250 V -
How it works
How Roof Top Solar Systems Work Solar Operation
The 181CS13C solar system has its vitreous enamel lined solar storage tank installed on the roof directly coupled to the solar collectors. In the Closed Circuit Series, heat is absorbed by the collector and passed to the ‘Hartgard’ heat transfer liquid inside the collector. As the temperature of the ‘Hartgard’ increases, the hot fluid rises up through the collector by the Natural Thermosiphon Principle, into the heat exchanger jacket around the potable water storage tank. Here, the heat is transferred to the potable water, cooling the ‘Hartgard’ fluid. The cooler fluid is then forced back down into the collectors through the displacement action of further hot fluid rising up into the heat exchanger jacket.
Orientation of Solar Collectors
To help maximise system performance, solar collectors should be installed with an optimum orientation facing true north (in the southern hemisphere) or true south (in the northern hemisphere). Always check for true north or true south using a compass or other suitable device.
To help maximise system performance, solar collectors should be installed with an optimum inclination. This is equal to 90% to 100% of the local latitude angle when collectors are oriented within 60° of true north or true south, and between 10° and 20° if the collectors are oriented between 60° and 90° from the optimum orientation. Generally, improved summer performance is obtained from an angle of inclination less than the optimum angle and improved winter performance is obtained by an angle of inclination greater than the optimum angle. If the angle of inclination varies by 20° from the optimum angle, the solar collectors will receive about 10% less total annual solar radiation.
Frost/Freeze Protection
Solahart Closed Circuit Systems are protected against freezing or harsh water conditions by our exclusive ‘Hartgard’ fluid. ‘Hartgard’ is a blue, non-toxic, propylene glycol fluid which, when mixed with water, provides the Heat Transfer Fluid contained in the solar collectors and the heat exchanger jacket around the tank. ‘Hartgard’ is used to lower the freezing temperature of the Heat Transfer Fluid and so provides protection against freezing (Note: for the correct % of Hartgard in the Heat Transfer Fluid, refer to the section on Frost / Freeze Protection). ‘Hartgard’ is a special food grade solution and is the only solution permitted to be used in the closed circuit systems. Hartgard has been approved by the National Health and Medical Research Council of Australia.
Solar Boosting
In-Tank Boosting
An isolating switch is installed in the electrical meter box for an electrically in-tank boosted model. This should be left switched on to allow the booster heating unit to operate if required. The booster heating unit is for heating the water at times of low solar energy gain, such as during very cloudy or rainy weather, or during the colder months. The booster heating unit will only activate if heating is required and power is available from the switchboard. When the water is below the thermostat setting, the booster heating unit will turn on and heat the water. The booster heating unit will automatically turn off when the temperature of the water reaches the thermostat setting. If the water temperature drops below the setting again the booster will re-activate.
In-Series Gas Boosting
An in-series gas booster (also known as an instantaneous gas booster) can be installed between the solar water heater and the hot outlets in the house. This booster should be permanently active. The booster senses the temperature of the water passing through it: if the water temperature is above its temperature setting it does nothing; if below it will automatically heat the water up to the preset outlet temperature setting. This device ensures hot water delivery for a variety of hot water demands without the need for user intervention while enabling maximum solar energy contribution to the water heating. For more information on this booster, consult the owner’s manual for the product.
Over-Temperature Protection System
The Closed Circuit Series solar water heaters have a means of controlling the maximum temperature of the water in the storage tank. These systems may be installed with a ‘HartStat’ valve located between the hot outlet of the collectors and the inlet to the tank heat exchanger. This valve closes when the tank has reached a sufficiently high temperature, thereby preventing further heat transfer to the tank, and thus limiting its temperature.
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