DAYLIFF ULTRASUN UFD, Installation & Operating Manual

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All units are fitted with 3kW electric booster heaters which should be connected to the
mains supply via 20A fuse or MCB by a qualified electrician. Manual control is suggested
with the switch mounted in a convenient place.
6. SYSTEM COMMISSIONING
a) Direct Systems
On installation or after service it is important that the system is primed. This is carried
out by first opening the incoming feed followed by the bleed cock and then observing
when all air is expended from the bleed outlet. Proper priming is important or else the
unit will not operate at full efficiency
b) Indirect Systems
As well as priming the service water as indicated above, it is important to fill the
heating system with pure water. Ordinary lowly mineralised tap or drinking water is
suitable and care must be taken to completely fill the collector and tank jacket. This is
done using the priming plug on top of the tank and carefully filling the unit until all air
is expended. It is also important to open the top collector bleed plug to ensure air
pockets are eliminated in the collection capillaries. Once primed, it is vital to ensure
that the system is properly sealed as fluid loss will render the system ineffective. The
system must therefore be thoroughly checked for leaks when operating and they must
be sealed accordingly.
7. USAGE
It is important that the hot water availability is properly managed as solar energy
heating only occurs between the hours of 9:00am - 4:00pm. This effectively means
that hot water is available in the evening as any draw off will result in temperature
reduction from the replacement cold water. If hot water is required in the morning
there should either be no night time draw off or the booster heater should be used.
Users should plan hot water usage accordingly.
8. MAINTENANCE
a) Direct Systems
Direct hot water system have no moving parts and are essentially maintenance free,
though periodically the collector glass cover should be cleaned as a dust layer will
reduce efficiency.
b) Indirect Systems
Indirect systems rely on the small volume of circulated heating water in the sealed
system and full efficiency is obtained only when it is fully charged with water. The units
must therefore be regularly checked, recommended on a monthly basis and any
leaked water replaced.