The document describes how air conditioning systems and central heating systems work. It explains that air conditioning systems use refrigerant that easily changes between gas and liquid states to absorb heat inside a building. The condenser and expansion valve work to cool the refrigerant into a liquid that cools the inside air. Central heating systems use a boiler to heat water, which circulates through a hot water cylinder and radiators to heat a building. Microprocessor controls are also explained.

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4. Keep in mind that the
‘gas’ that is being used is
called refrigerant. There
is a reason why
refrigerant is used and
that reason is that it has
the ability to be easily
converted to a gas and
back to a liquid again.
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How does an Air-Conditioning System work? Control
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5. Compressor
Cool low-pressure gas into hot high-pressure gas
Gas moves through the condenser outside the building
Gas cools down into a liquid
Liquid flows through the expansion valve
It evaporates into a cool low-pressure gas
As liquid changes to gas, it absorbs heat from the inside of the building.
Fan blows air across metal fins (which have chilled as a result of heat being absorbed)
The room cools down Back to
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10. Pump causes
heated water
from the cylinder Boiler used to
to flow round the heat the water
system to the
radiators
Water from the
boiler flows into
hot-water
cylinder
What happens in a micro-processed Back to
controlled central-heating system? Control
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14. NOTE: the end effector can have any of the
mentioned attachments BUT if the
end effector is changed you also need
to change the programming.
For example: you can’t have the robot that
was spray painting then to be used as
a screwdriver head without changing
the programming. Back to
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