A heat pump is a machine that by reversing it's refrigeration cycle can provide heating
in stead of cooling. Because a heat pump uses a refrigerant it can upgrade the heat
in air at even -15ºC to a usable heat source to heat buildings. Difficult to understand
perhaps but imagine a domestic fridge or freezer, reverse its cycle and that black
grille on the back will be very cold whilst inside will be very hot. Heat pumps
can extract heat from air and water and are nearly always used to both heat and cool
a building very efficiently and economically.
VRV is a system developed and designed by Daikin Industries and means "variable refrigerant
volume". Daikin protected the term VRV so other manufacturers use the term VRF "variable
refrigerant flow". In principle they both work the same and are extremely efficient,
reliable, energy saving ways to heat and cool all types of buildings with minimum
installation time or disruption. The volume or flow rate of refrigerant is accurately
matched to the required heating or cooling loads thereby saving energy and providing
more accurate control. In short, they are probably the best systems currently available
for mid to large applications.
An electrical inverter is used to vary the frequency of the power supply from a normal
UK 50 Hz enabling fine step speed control of motors (compressors) this in turn varies
the quantity of refrigerant delivered and hence variable cooling or heating capacity.
One of the most common causes of failure is that some one has switched off the power
supply. So check that fuses circuit breakers and isolators are all OK and working.
Another common cause is blocked air filters, so check they are clean and are regularly
kept clean. It helps to refer to the manufacturers operating instructions as well.
If all else fails and you are still having a problem, contact our service department.
Coefficient of Performance, which is the ratio between the power input and power
output. For example a modern heat pump will provide 3 kW of heat for 1 kW of electrical
power input. Therefore the COP is expressed as 3 - 1.
Energy efficiency ratio is used to express the relative efficiency of a heating or
cooling device by dividing the heat output by the power input. The higher the ratio
compared to others, the better the system is.
Energy labeling is a new way of allowing consumers to easily compare and rate the
efficiency of air conditioners and systems, similar to that used for domestic appliances
such as fridge's and washing machines etc.
Air conditioning and building services systems require regular maintenance to ensure
safety and optimum operational efficiency. Warranties are only applicable if the
system or equipment is regularly maintained by an approved organization. To simply
explain, relate this to a car which like air conditioning has many rotating and wearing
parts, your warranty will not be honored if you don't have regular servicing (maintenance).
Some do and others do not, however it is a very complex issue and needs more space
than we have here. In principle all refrigerants handled by competent companies and
technicians will never be released to the atmosphere so will not deplete the ozone
layer. Because accidents happen, alternative refrigerants are being developed all
the time, but it is important to note that refrigerants are not a major problem as
many other contaminates cause global warming problems. Primary problems are caused
by burning fossil fuels, e.g. petrol diesel, oil etc.
It is highly unlikely, you are more likely to catch it from a shower head in a hotel
room that has not been used for a long time. But, Legionella can be caught from the
aerosol spray of infected cooling towers of larger, older and poorly maintained air
I have been told that air conditioning spreads viruses and bacteria - Does it? RETURN
TO FAQ LIST
No more than you do or any ventilation system does for airborne viruses and bacteria.
Many people are susceptible to dryness sometimes caused when an air conditioning
system is badly designed or maintained and the relative humidity is reduced too much.
It's a fact that basically coughs and sneezes spread diseases, but some people will
blame anything for their ills rather than understand the facts.
Please explain the difference between air conditioning, comfort cooling and close
control? RETURN TO FAQ LIST
Air conditioning covers many things but is mainly, heating, cooling, ventilation,
fresh air, filtration and control of humidity.
Comfort cooling mainly relates to provision of just cooling to improve comfort.
Close control air conditioning is really as the name implies, both temperature, humidity
and air cleanliness are closely controlled and often to fine tolerances if necessary.
It could be that there is a problem with the compressor and you are advised to contact
us for further assistance. It could also be that a fuse or circuit breaker has recently
been replaced but the wrong replacement (smaller rating) has been fitted. Check,
but only if you are qualified to work on electrical systems.
Many reasons, the simplest being that you may have inadvertently set it to fan only
operation. Unfortunately it may also indicate a serious fault, Check your operating
instructions but if no luck, give our service department a call.
The air conditioning is running but the airflow is much lower than I remember? RETURN
TO FAQ LIST
Have you cleaned your air filter? - The most important user maintenance is to keep
those air filters clean.