The document summarizes information about the AIRCOSAVER, a device that retrofits existing air conditioning systems to improve their energy efficiency. It works by detecting when a system is overcooling and switching the compressor off to avoid wasting energy. This can save up to 30% on energy costs with minimal impact on comfort. The second generation AIRCOSAVER is easier to install and provides stronger protection for compressors and savings in more systems up to 10 tons. Overall, the AIRCOSAVER is presented as an affordable way to significantly improve the efficiency of existing air conditioning units.

1. Welcome to AIRCOSAVER - the Air Conditioning Energy Saver
The AIRCOSAVER Upgrading Philosophy
Your satisfaction is our top priority. We would like to give you as much information as possible to enable you to make an
informed choice. We would like to detail why installing an AIRCOSAVER makes sense and what can and can not be
achieved.
Air conditioning is a major consumer of electrical power
In many of the warmer countries around the world air conditioning is one of the largest energy consumers in the
residential and industrial sector. On a small scale air conditioning accounts for a large part of home and business
owners' energy bills. Millions of simple air conditioning units waste unbelievable amounts of energy every day. Not only
is the absolute power demand for air conditioning very high, but air conditioning also contributes to extreme peak
energy demand on the hottest days of the year which the energy infrastructure has to cope with.
Yesterday's aircon technology will be around for many years
Our advice to any owner of a low efficiency window unit or single split system is "Replace your entire old system today
and buy a new ultra-high efficiency system. Make sure it is dimensioned properly, that it is HCFC free and that it uses
the most advanced compressor and control technology!"
No matter how desirable this kind of change is, reality is different!
There are millions of older systems in use. In 2001 the Intergovernmental Panel on Climate Change (IPCC) estimated
that worldwide a total of over 289 million window/wall mounted units and unducted single split systems were in use. In
addition, an increasing number of these types of systems is installed every year. In 2001 only for the mentioned types of
systems this number was estimated to be almost 38 million, many of them still being low and mid efficiency units. The
most efficient new air conditioning systems are simply too expensive for many applications and payback time is still too
long. Besides, many countries still have not adopted high-efficiency standards for new systems.
So these simple units will be operating on a large scale for many years to come. They will not just go away. Nor
will they be replaced quickly. Average equipment lifetime is typically twelve to fifteen years and in many cases
much longer. However, usually these units are not considered for retrofits. Controller manufacturers usually
prefer to focus on very large system where even small improvements can be sold for high prices.

2. Solution: Bridging the gap with a cost effective retrofit
We think that retrofitting these smaller units makes a lot of sense in terms of overall reduced energy usage and reduced
operating costs. Retrofiting with the AIRCOSAVER can bridge the gap and lower energy consumption considerably until
new high efficiency system become more widespread. The AIRCOSAVER has been designed as an affordable and
practical device with short payback times.
Savings mechanism of the AIRCOSAVER
As engineers we do not believe in miracles and we are sure you don't, either. When we began designing a controller
specifically for retrofit purposes, we conducted a lot of research and experimented with various principles. We also
came across all sorts of "unique" devices and "black boxes" that claim phantastic energy savings.
Over time we became deeply persuaded that the most effective and practical method to create significant savings with
the smallest tradeoffs in cooling comfort is to determine the system's current thermodynamic efficiency and switch the
compressor off, when it is evidently inefficient. This is logical since the compressor typically accounts for 80% of the
system's energy consumption. This, in combination with protecting the compressor against potentially harmful short
cycling led to the AIRCOSAVER. We think that out of all retrofit solutions and out of all proposed cycling methods this is
the most effective with the smallest costs in cooling comfort.
Limitations of any retrofit
No retrofit will do miracles. With a given system there is always a limit to the possible improvements in energy
efficiency. A number of factors are fixed such as the type and efficiency of the refrigerant in the system. Other factors
can be optimized such as the runtime of the compressor. A retrofit will not remedy major planning mistakes or technical
faults in your system.
Potential tradeoffs of installing an AIRCOSAVER
Installing an AIRCOSAVER can slightly alter the cooling characteristics of your system. With an AIRCOSAVER
installed, inefficient overcooling is avoided. This is desired, since a lot of energy is wasted in this stage, but it may result
in slightly higher average evaporator coil temperatures since the savings algorithm also provides an anti short cycling
protection for your system.
In consequence this may have two effects. Firstly, the set point may be reached slightly slower without the wasteful
overcooling. However, overshoot of the set temperature is reduced as well. Cooling cycles become more gradual. This
is often considered very beneficial in terms of cooling comfort by residents.
Secondly, the dehumidification capacity of your system may decrease slightly. In extremely wet climates this can
potentially be a drawback. On the other hand, many customers have reported that the AIRCOSAVER has increased

3. cooling comfort because a certain degree of humidity contributes to the subjective wellbeing in a room. There are
various simple air conditioning units that by overcooling make the room air excessively dry.
In relation to the benefits, we consider these potential drawbacks as minor for a wide range of applications. Numerous
case studies and independent measurement have demonstrated that these changes - although measureable - have
very little impact on the overall cooling performance.
What the AIRCOSAVER can not achieve
The AIRCOSAVER can not compensate for deficiencies in the original system. For example, if your aircon system is
poorly serviced and does not cool properly in the first place, then the AIRCOSAVER will not change this.
Secondly, if an aircon unit is clearly undersized for a given application (too small for the heat load) and the compressor
runs for very long periods but the thermostat set temperature is never achieved, then the AIRCOSAVER will not remedy
this, either.
In conclusion, we recommend checking 2 things before installing an AIRCOSAVER
1. Only install an AIRCOSAVER on systems that are cooling properly in the first place. Make sure that the aircon
unit is in a decent service state (e.g. filters should be clean and not blocked). You could also measure the
supply air temperature with a small thermometer prior to installation. If this does not fall significantly below 20
degrees Celsius, DO NOT install an AIRCOSAVER.
2. Check if the aircon unit reaches the thermostat in normal operational conditions. If an aircon unit is clearly
undersized (i.e. the thermostat temperature is never reached and the compressor simply runs all day) then DO
NOT install an AIRCOSAVER. In these instances there are physically no savings possible anyway and the
AIRCOSAVER learning phase (until it has understood that the thermostat can never be reached) can result in
higher room temperatures. So this situation should be excluded.
What the AIRCOSAVER can achieve
An AIRCOSAVER will improve the overall energy efficiency of your system. Typical energy savings are up to 30%.
Generally these savings come at very small, hardly noticeable decreases in cooling comfort. It uses the the circuitry and
switches available in (and designed for) your system and does not require replacement of electronic components. The
AIRCOSAVER just adds one control dimension (thermodynamic saturation) to your system and compensates your
system's deficits.
Overall assessment
Weighing the potential small tradeoffs against the significant energy savings, we think that the AIRCOSAVER is
the optimum measure for achieving a significant improvement in energy efficiency. Furthermore, these savings
come at an affordable and reasonable cost which will result in a short payback period.
Energy efficiency: the smart answer to today's energy crisis!
Most existing air conditioning units waste a significant part of the consumed electricity because they are not controlled in
a smart way. To make these aircon systems more energy efficient is by far the quickest, most affordable and most
effective way to reduce your CO2 emissions and lower your energy bill.
And the good thing is: It's easy with an AIRCOSAVER!

4. The AIRCOSAVER
 Is a retrofit electronic control unit that adds intelligence to existing air conditioning systems and improves
their energy efficiency.
 Is a proven product with a large installed base that has been growing rapidly each year since 2001.
Worldwide, the AIRCOSAVER has been tested and installed successfully by various prestigious blue chip
clients and leading authorities.
 Achieves average energy savings of about 20% (often more, depending on local conditions) resulting in a short
payback period.
 is 100% engineered & manufactured to highest quality standards in Germany to give you peace of mind.
Energy saving for air conditioning systems
Air conditioning has a huge potential for efficiency improvements
Air conditioning is one of the largest energy consumers in the residential and industrial sector. Thousands of air
conditioners put high demands on our electricity networks. On a smaller scale, air conditioning probably accounts for a
significant part of your energy bill.
Many existing air conditioners use old and quite inefficient technology. Although improved technology has become
available in more expensive systems (e.g. inverter technology), the payback time of these systems is still very long and
most of this technology is not suitable as an easy and economical aftermarket fit to existing systems.
In the light of today's energy problems, global warming and since older and not so advanced aircon systems will be in
use for many more years in large numbers, we have analysed various existing energy saving techniques for air
conditioning systems and reviewed plenty of earlier research. The conclusion was that detecting the system's efficiency
and switching the compressor accordingly is probably the only effective, pragmatic and economical measure to achieve
a better energy efficiency. There is no "free lunch" with any retrofit, but these savings come at no or only very small
decreases in cooling comfort.
Upgrade your unit
Instead of investing a lot of money into an expensive new system, there is an easy and affordable way to improve the
energy efficiency of your existing unit:
Upgrade it with an AIRCOSAVER. The new product generation is now available!

5. About the air conditioning energy saver - Shortcomings of typical AC systems
A typical cooling cycle
When switched on, typical air conditioning systems operate continuously until the room thermostat senses the desired
temperature and turns the system off. As the room warms up, the thermostat switches the air conditioner back on and
the cycle repeats.
Most air conditioning systems are oversized for the majority of operating conditions
Air conditioning systems are usually dimensioned to cope with the extreme cooling demands of the few hottest days of
the year (plus a safety margin).
However, in most operational conditions, this maximum output is not required and the system is oversized. So running
the system continuously until the room thermostat switches it off means that the system operates with excess capacity
most of the time.
A typical cooling cycle with excess capacity looks like this:
 When the cycle starts, the compressor pushes cooling energy into the heat exchanger which acts as an energy
storage. At this stage, the system works with high efficiency because compressors operate most efficiently
when fully loaded.
 In normal weather conditions, the energy storage is soon fully "charged up". From this point onwards, the
compressor provides more cooling energy than the heat exchanger can take up (thermodynamic saturation).
 Running the compressor beyond this stage does not increase the cooling effect any more. It's just a
waste of energy!

6. About the AIRCOSAVER - How does the aircon energy saver improve energy efficiency?
The aircon energy saver compensates the shortcomings of typical AC units and adds intelligence to
your AC system
The AIRCOSAVER's sensor-driven software algorithms are designed to detect thermodynamic saturation and to
optimize the compressor accordingly. When overcapacity is detected, the AIRCOSAVER switches the compressor off
and avoids inefficient overcooling.
Your unit switches into "saver mode". The fan keeps running and your system makes maximum use of the stored
cooling energy in the heat exchanger. Once the stored energy is used up, the compressor can work efficiently again and
is switched back on.
The set room temperature is reached without the inefficient parts of the cooling cycle. This results in significant
energy savings without compromising cooling comfort.
Since the correct point to switch the compressor varies from unit to unit and changes with different weather conditions,
the AIRCOSAVER is constantly monitoring the cooling status of your aircon unit and adapting its settings to ensure
efficient operation of your air conditioning system at all times.
Protecting your unit against short cycling
Cycling the compressor too frequently in too short time intervals may harm the compressor and must be avoided. For
this reason, the AIRCOSAVER features a built-in anti short cycling protection.
Besides the continuous anti short cycling protection, the AIRCOSAVER also adds a delay upon power-on to your unit.
This valuable feature protects your aircon unit against damages from short power outages like they are common in
many developing countries.

7. About the AIRCOSAVER - features & benefits of the second AIRCOSAVER generation
Quick & easy to install
 Separate versions for all main power supplies (230V, 110V, 24V) available to make installation easier and
cheaper (no need to fit an additional transformer)
 Significantly increased switching power (12A / 120A inrush) - no need to install an additional relay
 Now available with or without strain relief for the wiring to enable internal or external mounting of the
AIRCOSAVER
Higher savings & guaranteed cooling comfort due to improved software
 Optimized parameter settings for higher savings at no noticeable decrease in cooling comfort
 Savings algorithm of the standard AIRCOSAVER optimised for systems up to 10 tons (please contact us for
special versions for larger cooling systems)
 AIRCOSAVER quickly understands the current cooling situations and constantly adapts to ensure best possible
savings at full cooling comfort.
Better protection for your aircon unit
 Improved anti short cycling protection and overall compressor protection
 Protection against short and potentially damaging power outages
Further product features
 New housing made of non-flammable, shock-proof polycarbonate (UL94-V0)
 Compliant to UL and CE regulations
 Developed and manufactured in Germany to highest quality standards.
For more information in regards to this product please use the following Numbers quoting “TZ007” to talk to
the Sole Distributors of the Airco Saver in Tanzania.
Contact Person - Irfan Khimji Mobile Number - 0788455341
Contact Person - Sarfraaz Kassam Mobile Number - 0757358116
Contact Person - Sameer Kassam Mobile Number - 0789007000