In 2014 F-Gas regulations, in Europe, were amended in order to prompt a phasedown of the use of HFCs. This regulation change was undergone with the hope that HFCs would be reduced to only 21% of its current usage by 2030. This goal is on track to being achieved as a 63% decrease is expected by 2018.

This phase down is being achieved through the introduction of quota allocations and sectorial bans on high-GWP HFCs as well as multiple governments taking further steps to reduce the use of refrigerants with a substantial impact on the environment.

Bitzer has expanded their range of compressors to meet this need for environmentally sustainable refrigeration. The Bitzer Ammonia Compressor Pack (ACP) does just that. Bitzer’s ACP is designed for a wide range of operations in high, mid and low temperature applications in industrial refrigeration and process cooling.

Bitzer Ammonia Compressor Afcon


Technical specifications

- Available with a capacity range of 100 to 450 TR

- Modular compressors units comprise up to 3 compressors

- Compressor packs can be connected (up to 9 compressors) and connected to a single controller

- Equipped with frequency inverter

- Common oil separator



- Optimal part load performance

- High efficiency: individual compressors can be turned on and off depending on requirements

- Maximum redundancy for high operating reliability: system has multiple ammonia screw compressors which increases its reliability over single industrial compressors

- Bitzer advanced oil management system

- Reduced installation costs

- Durability

- Fast availability for all replacement parts

For more infoamtion . . . 

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Afcon AnswersAfcon Answers

What does “Approach” mean in heat exchangers?

This term refers to the difference between the leaving process fluid temperature and the change of state temperature of the refrigerant. For evaporators, if water is cooled from 12°C to 6°C and evaporating temperature is 1°C, the approach is 5K. For condensers, if water is warmed from 30°C to 35°C and condensing temperature is 40°C, the approach is 5K.

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Bitzer Compressors and Ammonia Seminar

Following the success of last year’s Roadshow Bitzer South Africa offered another Road Show event in Durban yesterday, covering Bitzer compressors and Ammonia applications.

The event was held at the Durban Country Club. And was a great success. Thank you to all who attended, and to Bitzer South Africa for hosting.


If you are interested in the information discussed at this seminar . . .

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Afcon Bitzer Ammonia Compressor Seminar FridgemacAfcon Bitzer Ammonia Compressor Seminar

Afcon Bitzer Ammonia Compressor SeminarAfcon Bitzer Ammonia Compressor Seminar Fridgemac

Afcon Bitzer Ammonia Compressor Seminar


Afcon AnswersAfcon Answers





What is “Bubble Point”?

The bubble point is the temperature at which a liquid forms bubbles (usually the lowest boiling point of one of the constituents of a mixture like R407C).





 RIDDLE:  Together we will encounter a change from the old and start heading towards a city historically associated with Clogs for shoes
 NOW - ARE YOU "Ready-to-Eat"?  TRY A Manger at 129 Wilton Street!



Open iTunes to buy and download apps.
The BITZER REFRIGERANT RULER Work out refrigerant data – quickly and easily – with the free BITZER REFRIGERANT RULER from BITZER. The BITZER REFRIGERANT RULER, developed for iOS, covers all of the common refrigerants and contains data on their relevant physical properties. It offers an intuitive user interface with which it is quite simple to work out temperature and pressure for various refrigerants. The tool is one of the few applications which enables the use of imperial and metric units at the same time. It is available in both English and German. The main functions On the start screen, the user is shown all of the relevant information about the selected refrigerant, such as its dew and bubble point depending upon the pressure, as well as information about the best type of oil to use, the refrigerant’s global warming potential (GWP value) and its safety group. A ‘Refrigerants’ menu at the top-left edge of the screen gives you an overview of all available refrigerants as a list. When you select a refrigerant from the list, you are then shown its details page which contains more valuable information. By swiping to the right or left on the start screen, you can also switch directly to another refrigerant. Settings and filter functions can be found at the top right. The filter functions make it possible to restrict the refrigerants shown by their GWP values or to just show natural refrigerants. The settings allow you to switch between metric and imperial units. Additional advantages of the BITZER REFRIGERANT RULER The extra functions to select for natural refrigerants and for GWP values are two new and convenient options. Moreover, you can also access BITZER’s latest refrigerant report directly from the app!


Afcon Bitzer refrigerant ruler Afcon Bitzer refrigerant ruler

10′s of thousands of LPA® pumps have been installed as a simple retrofit means of getting liquid refrigerant to the expansion valves when minimum head pressure controls are set to reduced head pressures, thereby saving energy and increasing capacity at mild to cold outdoor temperatures.
The LPA® pump eliminates the usual problems of capacity loss and poor oil return due to operating with low head pressure.
Improved performance and efficiency of a system that has flash vapor in the liquid line. This is especially apparent if flash vapor is a serious problem, as in systems with excessive liquid line pressure drop, elevation gain in the liquid line, or if the air surrounding the liquid line is warmer than the outdoor temperature.
Reduced scaling problems on water-cooled systems when a small amount of high pressure liquid from the pump outlet is injected into the discharge line, reducing the vapour temperature.Afcon Hysave LPA retrofit pumps

The LPA works by boosting liquid refrigerant through the system…

The LPA works by boosting liquid refrigerant through the refrigeration system. By increasing the liquid’s pressure, the associated saturation temperature is raised, while the liquid temperature remains the same. The liquid becomes sub-cooled; reducing the potential for flashing prior to the expansion valve. With LPA, your business will enjoy higher efficiency, lower power draws and substantial cost savings.

reciprocating compressor cylinder head cooling LPA pump Hysave Afcon 


Taken from: http://www.hysave.com/technology/lpa-systems/



Nicknamed the work dog, now available with a high strength stainless steel housing to meet with pressures on demand. Built to stand up under heavy loads, LPA (Liquid Pressure Amplification) pumps, are equipped with built-in overload protection. Under adverse conditions, the magnetic drive acts as a clutch to eliminate overloading and motor burnouts.
The 875-SS-050-VSD (Variable Speed Drive) is now available with a high frequency drive compatible motor designed for continuous use up to 75hz if required.
PS 725 psi / 50 bar
PT 1,036 psi / 72 bar
TS Min -22°F / -30°C
TS Max 160°F / +72°C
Inlet ODF Copper 1-5/8″
Outlet ODF Copper 1-1/8″
Motor Power .75 hp
Voltage 208-230 /460
Ampere 2.4-2.2 / 1.1
Phase 3PH
Frequency 50 / 60Hz
Thermal Overload
REFRIGERANTS: (Fluid Type /GAS GROUP 1&2 /UL Classified)
Co2 R-290 R-134a R-401a R-401b R-401c R-402a R-402b R-404A R-407A R407b R-407c R-408a R-409a R-410A R-500 R-507
OUTDOOR PROTECTION IP54 | Altitude 2000M | Corrosive & Polluting Substance Class 4C2 | Vibration & Shock Class 4S2 | Presence of Dust Class 4S2 | Corrosion Protection Level ClassIP43B
MAINTENANCE: Maintenance free, no service required.
Manufactured to: DIR 97/23/EC “CE” CAT A1 / UL Recognized \ Shipping Weight 46 lb’s | Dimensions L 25″ x W 16″ x H 16″ \ Component Weight 42 lb | Dimensions L 17″ x W 14″ x H 10″
Mechanical Life Wet End Assembly +20 years | Mechanical life Impeller +100,000 continuous hrs | Mechanical Endurance +300,000 cycleshanical Endurance +300,000 cyclesAfcon Hysave LPA retrofit pump

Afcon Customer Profile Alvin Brown JNC Thermal Thermal Dynamics









Alvin Brown

Alvin, owner and manager director of Thermal Dynamics & Engineering and JNC Thermal Systems, has been working in the HVAC&R for 20 years. He has gained much experience allowing him to specialise in chillers, so we sat down with him to discuss how he began his career, where it has taken him and what he feels helped him get where he is today.

What is your general background?
Why did you go into this industry originally? My father was the Refrigeration & Air-Conditioning Engineer at Beacon Sweets for 23 years, this naturally drew my interest to the trade from my young high school days. He started teaching me to repair small scale refrigeration equipment in our garage from the time I was in grade 10. After matriculating, I did my apprenticeship at York International, qualified, then slowly moved my way up in the Industry, ultimately to opening Thermal Dynamics & Engineering in 2009.

Where did you study or do your apprenticeship?
I studied at UNISA, did my apprenticeship, and many plant specific training courses, at York International.

Where have you worked over the years?
Started off at Million Air Services(about 2 years), spent 4 years at York International, spent a short 7 months at Combined Air Services, spent 6 years as a service manager and share holder at DJ Thermal Engineering, opened Thermal Dynamics & Engineering beginning of 2009 until present.

Where did you gain your chiller experience?
Fortunately, I was well trained on chillers from York International days, grew and gained experience throughout my career, actually still learning now, you never stop learning.

How long have you been working in the industry and how long specifically with chillers?
Been in the industry for 20 years and have been exposed to chillers since the beginning.

What do you enjoy about working with chillers, which led to your specialisation in them?
I like to specialize in a field, you tend to always be needed in the industry.

What plants have you worked at in the past? Or do so currently?
Eskom Power Station in Drakensburg, Boxmore Plastics (Harrismith, CPT, Bloemfontein & Mauritius, Zambia), Coca Cola (PE, Mozambique & Mauritius), St Augustines Hospital, Sasko Bakery, Boxer Meats Factory in Ballito, just to name a few. All the plants at the above sites are chillers for production purposes. We also work on several cold storage facility plants which run on screw compressors (low temperature and medium temperature), a few ammonia screw sets used for food production blast freezers and many air-conditioning systems from chilled water to standard DX split systems.

Which fouling factors does Onda suggest for the selection of shell and tube heat exchangers?

The fouling factor is important for the selection of an evaporator. The value Onda suggest to input in selection software are:

For evaporators: -    Normal water in closed circuit: 0,000043 m2K/W; -   

Water in open circuit: 0,000086 m2K/W; -   

Solutions with glycol <40%: 0,000086 m2K/W; -   

Solutions with glycol >40%: 0,000172 m2K/W.

For condensers: -   

Normal city water: 0,000043 m2K/W; -   

Treated tower water: 0,000043 m2K/W; -   

River water: 0,000086 m2K/W; -   

Solutions with glycol <40%: 0,000086 m2K/W; -   

Solutions with glycol >40%: 0,000172 m2K/W.

 ONDA Afcon Shell & Tube Condenser



The SAIRRAC Golf Day took place on Friday the 2nd of September, where Afcon had both a 4 ball participating as well as sponsoring the 11th hole.


Tarryn Ching did a fantastic job of organising and ensuring that the day was a success, and as always the HVAC&R industry support was outstanding. The supplier support was excellent, with multiple suppliers sponsoring holes, which added to the festive atmosphere. As well as lots of suppliers and contractors participating in the golf day. All golfers, pro or amateur, could be seen enjoying the day, lots of fun was had and many beers drunk.


Is it always lovely for industry members to get together, share camaraderie and swop war stories. 


Afcon SAIRAC Commercial Refrigeration

Afcon SAIRAC Carel Bitzer


Afcon Bitzer Green Point Compressors 

Afcon has sent compressors to Bitzer Green Point Johannesburg to be assessed, quoted on and subsequently overhauled with great success. The over all experience has left us very pleased with the availability of this service, and we look forward to utilising it in the future.


Bitzer’s “Green Point” Program was set up in Johannesburg in 2015. The program is part of a global network of service centres, which boasts a reliable service and overhaul for your reciprocating and screw compressors. The technicians have been trained at the Bitzer Green Point international training centre in France and receive constant support from Bitzer as well as are updated with its latest developments. Green Point employees maintain, overhaul and repair BITZER compressors.


Afcon Bitzer Green Point CompressorsBitzer Green Point CompressorsAfcon Bitzer Green Point Compressors




Afcon Bitzer CO2 as natural refrigerant


Dave Nicholl’s was recently involved in an interesting installation involving CO2 at a large retail store in KZN and here’s what he had to say about it...

The plant was designed by Richard Drinkrow and installed by Mainstream. The compressors are all Bitzer semi-hermetics and are VSD capacity controlled.  Richard has put in the hours and learnt his trade well and it was a privilege to spend time on their site. The pressures involved are high by our normal standards but all the very high pressures are in the plant room. The compressed high pressure CO2 is cooled in a Plate Heat Exchanger and via a special valve, the now cooled gas flashes into liquid/gas where the flash gas is recovered and re-compressed. The receiver/cooler on the Rack collects the liquid CO2 and that goes to the trading floor where it does the normal cooling in the cabinets and cold rooms etc. The LT system has its own dedicated compressor/s on the same Rack.
The work put in by Richard Drinkrow and others including the late Mike Holt prove that this country have some excellent engineers who are among the world's best.
My thanks to Malcolm Green from Fridgemac for arranging my site visit.
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 AFCON Industrial Equipment are Bitzer agents in KwaZulu Natal.  We hold a large range of stock in spare parts at our office in Durban & can identify parts that you may need.


AFCON has been Bitzer agents since 1999 and have a wealth of experience in Bitzer products.

Ecoline and spares
Inside the envelope you will find a WORN KEY which may reveal our destination providing you have Time to visit the centre of ecclestone Square park.
 Clue Two
Bitzer Screw compressors are manufactured to Bitzer's exacting standards at the Rottenburg-Ergenzingen factory.  BITZER has invested more than 70 million Euro over the past ten years in the plant to increase efficiency.
AFCON are expert in the screw compressor range and have worked with many of our customers to design Screw Compressor plants for the South African market.
Afcon Bitzer Screw Compressor
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