Solahart Streamline

Split System Solar Water Heater

Solahart’s split system solar water heaters are designed to give you the maximum flexibility of installation locations. The low profile and unobtrusive Solahart solar collectors are mounted on a roof, whilst the storage tank is mounted at ground level out of sight. The electric boosted model can even be installed inside your home. This minimises the visual impact of going solar, while maximising the potential savings from the sun.

Capacity

The Solahart Premium System is available in 270lt, 320lt and 410lt capacities to ensure every household has ample hot water.

Mounting Options

With mounting options for flat and pitched roofs; open vented and high pressure, we have a solution for any sitution.

Streamline Split Solar: Key Attributes

OPTIMAL PERFORMANCE

In medium solar gain areas that do not experience frost

Most suitable for areas that receive medium to high levels of solar radiation and are not subject to frost conditions.

CERAMIC LINED TANK

Minimal Maintenance, Maximum Protection

Corrosion protection for the water heater’s solar tank is achieved by using a proven, high quality vitreous enamel lining on the tank. Additional protection is gained by the use of a sacrificial anode.

SPLIT SOLAR SYSTEM

Minimises the visual impact of going solar

Solahart’s split system solar water heaters are designed to give you the maximum flexibility of installation locations, while minimises the visual impact of going solar and maximising the potential savings from the sun.

Key Features

The Streamline Split Solar system is available with Solahart’s ‘L’ solar collectors to harvest the sun’s heat and transfer it to the water. The L collector with its black powder coated aluminium absorber plate provides economical service in low to high solar gain areas.

Solar energy is transferred directly to the water as it is moved through the collectors by an electric circulator and the heated water is stored in the ground mounted MDV series tank. The electric boosted models are equipped with an in-tank element to ensure a supply of hot water during periods of poor or no solar gain. Alternatively the system can be installed as a preheater with an inline Solahart gas booster water heater.

Technical Specifications

Tank Model 270MDV 320MDV 410MDV
Storage Capacity 270 litres 320 litres 410 litres
Boost Capacity (Electric) 140 litres 170 litres 220 litres
Weight Empty 82 kg 92 kg 115 kg
Weight Full 352 kg 418 kg 531 kg
Height 1.395 m 1.640 m 1.840
Width 0.640 m 0.690 m
Depth 0.680 m 0.730 m
L Collectors
Aperture (heating) Area 1.87 m2
Dimensions
Length 1943 mm
Width 1027 mm
Height 83 mm
Capacity 1.2 litres
Weight*
Empty 29 kg
Full 32 kg
Working Pressure 1000 kPa
145 psi
Absorber Surface Black polyester powder coat
Absorber Material aluminium
Riser Material copper tube
Tray Material 0.7 mm aluminium
Insulation Material – Base 38 mm polyester blanket
Glass 3.2 mm tempered low iron glass

* Weight includes fittings

Electric Boost Specifications
Heating Unit Type Cooper sheath immersion element
Supply Voltage 240 V -250 V
Recovery Rate (litres/hour) @ 240V and Temperature Rise of:
Rating
kW		 Current
Amps		 30°C
litres/hour		 40°C
litres/hour		 50°C
litres/hour
1.8 8 51 39 31
2.4 10 68 52 41
3.6 15 103 77 62
4.8 20 137 103 83
Water Supply
TPR Valve Setting 1000 kPa
145 psi
ECV* Setting 850 kPa
125 psi
Max. Supply Pressure
With ECV 680 kPa
Without ECV 800 kPa
Water Connections
Cold DN15 compression fitting
Hot R 1/2

How Split System Solar Water Heaters Work

With open circuit split systems the water is circulated from the tank at ground level through the solar collectors by an electric pump called a ‘circulator’. As the sun heats the water in the solar collectors, the increase in temperature activates the circulator. The circulator switches on whenever the water in the solar collectors is hotter than the water in the solar storage tank. The circulator moves the hotter water from the solar collectors through the solar hot pipe to the solar storage tank and the cooler water from the solar storage tank is circulated to the solar collectors via the solar cold pipe to be heated by the sun’s energy.

This process continues whilst solar energy is available and the water in the solar storage tank requires heating. The circulator will deactivate when the water temperature in the solar storage tank is around 70°C to 75°C.

The Solahart 272MLV split solar 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. If installed with an in-series booster, then the electric booster heating unit will not be connected to a power supply.

Solar Operation

As the sun heats the water in the solar collectors, the increase in temperature activates the circulator. The circulator switches on whenever the water in the solar collectors is hotter than the water in the solar storage tank. The circulator moves the hotter water from the solar collectors through the solar hot pipe to the solar storage tank and the cooler water from the solar storage tank is circulated to the solar collectors via the solar cold pipe to be heated by the sun’s energy.

This process continues whilst solar energy is available and the water in the solar storage tank requires heating. The circulator will deactivate when the water temperature in the solar storage tank is around 70°C to 75°C.

During normal operation if the amount of solar energy available reduces, such as when the sky becomes very cloudy or the sun becomes lower in the sky in the late afternoon, and the water no longer gains usable heat from the solar collectors, the circulator will deactivate. The water heater will then enter standby mode.

Over-temperature Operation

The purpose of the Over-temperature operation is to reduce the amount of overheating or ‘stagnation’ of water in the solar collectors. When the water in the solar storage tank has reached 70°C to 75°C and the circulator has deactivated, the solar collectors will continue to gain heat while solar energy is still available.

If the water in the solar collectors stagnates and its temperature becomes very high, the circulator will activate for a short period to transfer this extra energy to the solar storage tank. The circulator will deactivate when the water temperature in the solar collectors decreases. This process will either repeat for a maximum of eight cycles or until the water temperature in the solar storage tank reaches around 75°C to 80°C or the hot sensor does not sense another increase in water temperature to a stagnation level after a cycle is completed, i.e. the solar energy available reduces.

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

An Open Circuit system does not have freeze protection and is not suitable for installation in areas prone to freeze conditions. Freeze conditions occur below 5°C (41°F). This system has NO WARRANTY for freeze damage. In areas that are prone to frost / freezing, a Closed Circuit system should be used.

Solar 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.

Downloads

Why Solahart Solar Hot Water Systems: Download

Solahart Premium Solar Hot Water System Brochure: Download