Ozroll OZS251E, Руководство по установке

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D. TYPES OF SYSTEMS – OPEN LOOP vs CLOSED LOOP
OPEN LOOP SYSTEM
In areas of frost, water may freeze in the collectors causing the collectors to rupture, The OPEN LOOP system
provides an AUTOMATIC FREEZE PROTECTION SYSTEM to prevent freezing and damage to the collectors. The
pump control system is automatically activated when the temperature gets too low. The system has been tested
and assessed against the freeze protection requirements Level 2, of AS2712, section 4.8. The activated pump
pumps hot water from the tank into the collectors when they are in danger of freezing therefore, ensuring the
collectors are not damaged.
CLOSED LOOP
or indirect systems do not heat potable water directly. Instead, an anti-freeze solution circu-
lates through the collectors, and then through a heat exchanger which transfers the heat to mains water. This
provides freeze protection and is also suited for use in poor water quality areas and frost prone areas. Closed
loop systems are more complex in design, more expensive and more difficult and time consuming to install. In
Australia, most systems sold to consumers are open loop as climatic conditions are favourable
E. HOT WATER USAGE PATTERNS
The time of use of the hot water from such a tank becomes significant. If the hot water is used at night the
boost electricity will bring the entire contents of the tank up to temperature.
If the hot water is used in the morning or during the day, and it is a sunny day, the solar input is likely to heat the
water so that little or no night boosting is required. This maximizes the efficiency of the system and minimizes
the requirement of additional heating from the booster.
F. TANKS
F1 – TANK TYPES
Basically there are 2 types of hot water tanks, Stainless steel and Vitreous enamel tanks
We only use Vitreous enamel tanks. We consider vitreous enamel to be the most appropriate lining of solar hot
water tanks under Australian conditions. The vitreous coating provides excellent corrosion protection by sepa-
rating the steel tank lining from the water and it also insulates the tank. Vitreous tanks can withstand extremes
of temperature and are suitable for most water qualities with the Magnesium anodes providing additional pro-
tection to the effects of corrosion.
Vitreous enamel lined water heaters are suitable for water with a Total Dissolved Solids ( TDS ) rating of
2500mg/L or less. TDS (measured in mg / litre ) = Conductivity ( measured in Microsiemens) x 0.7
F2 – TANK SIZES
Our tanks come in 3 sizes, depending on the number of collectors required and volume of water required to be
stored. The tank sizes are 250 litres, 300 litres, 400 litres capacity
STORAGE TANK P/N CAPACITY HEIGHT ( TANK ONLY ) DIAMETER
31.100.100 250 litres 1353mm 620mm
31.100.101 300 litres 1572mm 620mm
31.100.102 400 litres 1629mm 710mm
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