52C300 Roof Top Solar: Key Attributes

Key Features

The 52C series solar water heater is an indirect solar hot water system with a heat exchanger wrapped around the inner cylinder as part of the solar storage tank design. The vitreous enamel lined solar storage tank is installed on the roof directly coupled to the solar collectors. This water heater is designed to be installed as an electric boosted solar water heater with its booster heating unit connected to a power supply, however it may be installed with an in-series continuous flow or storage booster.

The solar water heater uses the thermosiphon principle, without the need for a pump, circulator or sensors. The solar collectors absorb solar energy. The low-iron content solar glass allows more solar energy to pass through and be used to heat the collector‟s absorber plate than conventional glass.

  •  Space saving roof mount design
  •  Reliable, low maintenance operation
  •  Energy Efficient – cuts water heating energy use by up to 87%^
  •  Eligible for Government rebates and incentives

 

* The suggested price is comprised of RRP less the applicable solar incentive and excluding installation. Solar incentive value applies to 52C300/NPT solar hot water system in Zone 3.

^ Energy savings of up to 47% to 87% shown are based on Australian Government approved TRNSYS simulation modelling using a medium load. Savings and incentives will vary depending upon your location, type of Solahart system installed, orientation and inclination of the solar collectors, type of water heater being replaced, hot water consumption and fuel tariff. Maximum financial savings off your hot water bill are achievable when replacing an electric water heater on continuous tariff. 

† Solahart Warranty Details: 5/3/1 warranty; 5 year cylinder and collectors supply, 3 year parts, 1 year labour.

52C300 Solar Specifications

Model 52C300/2NPT-G 52C300/2NPT
Storage Capacity 300 Litres 300 Litres
Solar Collectors NPT200 NPT200
Booster Type Gas - Remote Electric
Booster Capacity 27L/min 150 lt
People Per Household 2-5 2-5
Dimensions & Specifications    
Height (A) 508 mm 508 mm
Width (B) 2425 mm 2425 mm
Depth (C) 2475 mm 2475 mm
Collector Depth (D) 1937 mm 1937 mm
Collector Width (E) 2094 mm 2094 mm
Collector Height (F) 77 mm 77 mm
Weight Empty - Tank 98 kg 98 kg
Weight Full - Tank 398 kg 398 kg
Weight Empty - Solar Collectors 66 kg 66 kg
Weight Full - Solar Collectors 70 kg 70 kg

 

Electric Boost Specifications
Heating Unit Type Copper sheath immersion element
Supply Voltage 220 V - 250 V
Recovery Rate @ 240 V and Temperature Rise of:
Rating
kW 
Current
Amps 
30°C
litres/hour 
40°C
litres/hour 
50°C
litres/hour 
1.8 51  39  31 
2.4 10  68  52  41 
3.6 15  103  77  62 
4.8 20 137 103 83

How Roof Top Solar Systems Work

Solar Operation

52C300 series solar water heater is an indirect solar hot water system with a heat exchanger wrapped around the inner cylinder as part of the solar storage tank design. The vitreous enamel lined solar storage tank is installed on the roof directly coupled to the solar collectors. The heat exchanger and solar collectors are connected by copper pipe work and form a closed circuit which is filled with closed circuit fluid.

The closed circuit fluid is a solution of a blue, non-toxic food grade propylene glycol heat transfer fluid concentrate mixed with water. The heat transfer fluid concentrate is used to lower the freezing temperature of the closed circuit fluid and provides protection against freezing. The closed circuit also provides protection to the solar collectors and solar pipe work against harsh water chemistry.

The solar water heater uses the thermosiphon principle, without the need for a pump, circulator or sensors. The solar collectors absorb solar energy. The low-iron content solar glass allows more solar energy to pass through and be used to heat the collector‟s absorber plate than conventional glass. As the closed circuit fluid gains the sun‟s heat from the absorber, the increase in temperature causes the fluid to rise through the fluid ways and up into the heat exchanger where it transfers its heat into the water in the solar storage tank. This allows cooler fluid from the heat exchanger to flow into the solar collectors to be heated by the sun‟s energy.

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.

Brochures

Why Solahart Solar Hot Water Systems: Download

52C300 Solar Hot Water System Brochure: Download

Solahart In-Line Gas Booster Brochure: Download


Installation Manuals

On-Roof Solar Hot Water System Owner's Guide and Installation Manual: Download

Solahart In-line Gas Booster Owner's Guide and Installation Manual: Download


Solar Incentive Forms

Small-scale Technology Certificate Assignment Form: Download

Download the Solahart 302LCSC Solar Hot Water System Brochure