Introduction To Solar - Baxi MULTIFIT Evacuated Tube Collector Kit Instructions

Fig. 1- Schematic
10 Tube Kit
Flow Meter
Return
Sensor
Drain Points
© Baxi Heating UK Ltd 2011
Cold Feed
Reheat
Sensor
Combi Valve
1.0

Introduction to Solar

1.1 Description
Thank you for purchasing a high quality Baxi Solarflo
Thermal Domestic Hot Water System.
The sun is the ultimate source of most of our renewable
energy supplies. Energy from the sun is clean and abundant.
There is a widely held opinion that the UK does not have
enough sun to make solar systems worthwhile. In fact parts of
the UK have annual solar radiation levels equal to 60% of those
experienced at the equator.
However, this energy is not received uniformly throughout the
year. Some 70% of UK annual radiation is received over the
period April to September and 25% is received in the months
of June and July.
Solar water heating technology captures energy from the sun
and transfers this to a water heater to raise the water
temperature therefore reducing the reliance on fossil fuel
energies such as gas, oil and electricity. Up to 60% of a
dwelling's annual hot water requirement can be provided by a
solar water heating system. The balance is provided by
traditional means via a second heat exchanger connected to a
fossil fuel boiler or electrical heating by electric boiler or
immersion heater.
The Baxi Solarflo water heating system provides all the
TM
principal components required for an efficient solar water
heating system. The sun's energy is captured by a series of solar
collectors through which a special heat transfer fluid is pumped.
As the fluid passes through the collector its temperature is
raised. The heated fluid is circulated through a heat exchanger
coil in the base of the solar storage cylinder transferring the
heat gained to the stored water, gradually raising its
temperature. The cooled fluid then returns to the collector to
be heated again. Heating by the solar coil is controlled by a
solar differential temperature controller that ensures the system
will only operate when there is useful solar heating gain at the
collector. As the sun's energy input to the collector is variable
supplementary heating by a conventional boiler or electric
immersion heater should be provided. The optional cylinders
that can be supplied with the Baxi Solarflo
supplementary heat exchanger coil and immersion heater as
standard.
1.2 General
Avoid the use of hacksaws if at all possible. Using the correct
pipe cutting tools will reduce the amount of debris in the
system prior to flushing.
Read in conjunction with Solar Collector Guide.
Solar
TM
package provide a
TM
3