Case Study - Viessmann Vitorondens 200-T Oil Boiler

Viessmann Installation at a Grade II Listed Home

When the owner of a former listed rectory dating back to around 1600 in a small village outside Salisbury, Wiltshire, came to replace the property’s fifty year old boiler and gravity fed heating system, he naturally had high expectations.

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The project needed to significantly reduced running costs (the old system consumed 2,000 litres of oil per month), provide a constant space heat temperature and enable the heating, hot water and secondary hot water circuits to be controlled independently and remotely. Salisbury-based Viessmann partner, AHS Ltd., specified a Viessmann Vitorondens oil-fired boiler, with weather compensation and Vitotrol 300A remote controls. The result is a modern, fuel efficient heating system which is saving £8,000 per year, or around 70 per cent of his previous expenditure on oil.

The Technical Side:
  • 60kW Vitorondens 200.
  • Vitocell 300-B 500L.
  • 3 x Header Divcon Units with mixers.
  • Vitocom 100 with Virotrol App.
  • Vitotrol 300A remote control (3 heating circuits).
  • Wilo Comfort COR-2 pressure booster set.
  • Break tank.
  • 2 x large expansion vessels.

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Viessmann Vitorondens oil-fired boiler, with weather compensation and Vitotrol 300A remote controls.

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The new heating system comprises three fully weather compensated heating circuits and one constant temperature circuit for under-floor heating.

Which means:

Saving space, saving oil.

With oil bills of almost £13,000 per year at the 6,660 sq. ft., six bedroom, four bathroom home, fuel efficiency was a major priority. The Viessmann system – attractive because of its product build quality, system performance and user- friendly controls – was also the only one to come with weather compensation controls. These would fully optimise the Vitorondens 200’s efficiency and improve internal comfort, regardless of external temperature.

The installed system provides three fully weather compensated heating circuits and one constant temperature circuit for under-floor heating. One cylinder loading circuit with controls operates the heating and hot water and also the secondary hot water circuits. A welcome benefit of the advanced Vitotrol 300A controls is that AHS can monitor the system remotely on behalf of its client.

Noise was also a key consideration as the boiler’s flue would terminate above an outside seating area. The Vitorondens outperformed its competitors on noise levels.

AHS was called in as one of the few companies who could take on the complexities of the equipment and the task of designing, specifying and constructing a new, 9 ft by 6 ft plant room, in an outbuilding next to the main house. Tight for space and access, there was a lot of kit to install and most of it had to be dismantled and built inside the room. Thanks to the swift work of AHS, the crossover to the new plant room was achieved in just two days.

Overall the installation has resulted in a huge reduction in heating costs and oil consumption of around 70 per cent. Says a satisfied AHS Customer:-

In a property with no particular thermal efficiency, the installation of a highly efficient oil boiler and the very latest in temperature curve control programming has achieved a massive shift in performance.

Written by ‘The Girl in the Office’.

Carbon Monoxide Poisoning Awareness Poster

Carbon Monoxide Poisoning

Carbon monoxide is a poisonous gas that kills hundreds of people each year and injures many more. It is often referred to as the silent killer; it has no odour or taste and cannot be seen. Like oxygen, CO enters the body through the lungs during the normal breathing process. It competes with oxygen by replacing it in the red blood cells, thereby reducing the flow of oxygen to the heart, brain and other vital organs. In high concentrations, CO can kill in minutes. Many cases of reported carbon monoxide poisoning indicate that while victims are aware they are not feeling well, they become disorientated and unable to save themselves by either exiting the building or calling for assistance. Exposure during sleep is particularly dangerous because the victim usually does not wake up.

Symptoms of CO poisoning

The following symptoms may be related to CO poisoning which all household members should be made aware of:

  • Mild Exposure: Slight headache, nausea, vomiting, fatigue (often described as ‘flulike’ symptoms)
  • Medium Exposure: Severe throbbing headache, drowsiness, confusion, fast heart rate
  • Extreme Exposure: Unconsciousness, convulsions, cardiorespiratory failure, death

A CO detector monitors the level of CO as parts per million (ppm) in the atmosphere surrounding the detector.

35ppm The maximum allowable concentration for continuous exposure for healthy adults in any 8 hour period, as recommended by the Occupational Safety and Health Administration (OSHA).

200ppm Slight headache, fatigue, dizziness, nausea after 2 – 3 hours.

400ppm Frontal headaches within 1 – 2 hours, life threatening after 3 hours.

800ppm Dizziness, nausea and convulsions within 45 minutes. Unconsciousness within 2 hours. Death within 2 – 3 hours.

Should you suspect CO may be affecting you or your family, open the doors and windows of your property to ventilate, turn off your appliances and evacuate the premises. At this time the authorities should be contacted to locate the source of the carbon monoxide before re-entering the building. Medical attention should be sought for anyone suffering the effects of CO poisoning.

Common sources of CO:
  • Oil and gas boilers
  • Portable generators
  • Oil or solid fuel cookers
  • Gas or paraffin heaters
  • Barbecues
  • Clogged chimneys
  • Gas, wood, coal or coke fireplaces
  • Cigarette smoke
  • Gas appliances
  • Any fossil fuel burning appliance

It is relatively inexpensive to have a CO alarm fitted in your home, so don’t hesitate to call us today to arrange for one of our engineers to visit your home.

Keep your family safe!

Written by ‘The Girl in the Office’

Boiler installation in Shaftsbury

Fighting Legionella

It is well understood that legionella, a bacillary germ similar to pneumonia, causes severe health issues for humans.  Recent cases of legionella infection have prompted industry figures, such as the Association of Plumbing and Heating Contractors, to speak out about the importance of quality materials and disease prevention training for those responsible for the control and maintenance of water systems.

The issue of prevention runs deep however, right back to the initial system design stage.  A fundamental part of good water network design is rooted in understanding how the choice of materials used can affect the health of a system.

A system which is correctly designed from the beginning will encourage the correct flow of water without creating areas where water is stationary, stagnant and susceptible to the risk of bacteria growth, and potentially legionella contamination.  ‘Dead Legs’ in a system, where a section of pipe contains unmoving water, are a major risk for legionella growth and eliminating these in the first place can go a long way to fighting waterborne diseases throughout the plumbing system.

The proliferation of bacteria such as legionella in water systems can pose a major health risk, particularly for vulnerable people such as the elderly.  Recognising the severity of this issue, EU regulations were introduced to provide a consistent water quality policy for all member states during 2015, with more to come.  The plumbing industry has a huge part to play in ensuring that quality control is maintained.

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A customer’s roof tanks, in desperate need with a real risk of Legionella!

THRIVING BACTERIA

Legionella-based illness are contracted from inhalation rather than ingestion; the bacteria thrives particularly in water circuits where the temperature ranges between 25 to 45 degrees Celsius and is most commonly transferred by aerosol action, such as water vapours from air conditioning systems and faucets.  The spread of this type of bacteria depends on certain key elements; the nature of the water, absence of circulation, ambient temperature, lack of on-going treatment, and sometimes the choice of materials used.  It is therefore vital that these main criteria are adhered to when trying to avoid contamination of the water systems.

HEALTH & SAFETY

According to the HSE – L8 approved code of practice and guidance document, the growth of legionella bacteria in pipework can also be linked to biofilms essentially nutriment build up), which are in turn linked to the survival of waterborne bacteria.  Good design and construction of a pipework network is key to optimum system functionally, yet the choice of materials used has also been found to substantially improve the health benefits too.  Studies gathered by International Copper Association regarding cooper’s ability to destroy a wide range of bacteria, including legionella, show that copper kills at least 99.9% of bacteria within two hours of exposure.

Control of Substances Hazardous to Health regulations impose a responsibility on persons controlling premises, or its water system, to ensure that all harmful bacteria is minimised.  Filtration and reducing the build-up of debris that can act as a nutriment source in water systems is an important step in minimising biofilm in the system.  However, while copper is proven to have antimicrobial qualities and ongoing mechanical benefits, it should not be installed as a device for sterilisation or as a means of improving the potability of the water system.

Choice of material aside, good maintenance practice is paramount and without it bacteria growth in pipes can increase.  Rigorous maintenance should be implemented to ensure all breakdowns in the network are minimised, which will in turn reduce the risk of bacterial growth developing in water that has sat in pipes for extended periods.  Once installation is complete, it is essential that those charged with maintenance understand how to completed checks and report any concerns.  If we take these points on board as an industry, we can minimise the proliferation of legionella bacteria and the threat of Legionnaires’ disease in our water heating systems.

Gas Safety Week Logo

About Gas Safety Week

Gas Safety Week is an annual safety week to raise awareness of gas safety and the importance of taking care of your gas appliances. It is co-ordinated by Gas Safe Register, the official list of gas engineers who are legally allowed to work on gas.

Badly fitted and poorly serviced gas appliances can cause gas leaks, fires, explosions and carbon monoxide poisoning. Every year thousands of people across the UK are diagnosed with carbon monoxide poisoning. It is a highly poisonous gas. You can’t see it, taste it or smell it, but it can kill quickly with no warning.

By taking care of your gas appliances properly you are taking care of your home and your loved ones.

Follow these few simple checks to keep you and your family safe.

• Check your gas appliances every year. Gas appliances should be safety checked once a year and serviced regularly by a Gas Safe registered engineer. Tenants – make sure your landlord arranges this. Set a reminder so you don’t forget at www.staygassafe.co.uk.

• Check your engineer is Gas Safe registered. You can find and check an engineer at www.GasSafeRegister.co.uk or call 0800 408 5500.

• Check your engineer’s Gas Safe Register ID card. Make sure they are qualified for the work you need doing. You can find this information on the back of the card.

• Check for warning signs your appliances aren’t working correctly e.g. lazy yellow or orange flames instead of crisp blue ones, black marks on or around the appliance and too much condensation in the room.

• Know the six signs of carbon monoxide poisoning – headaches, dizziness, breathlessness, nausea, collapse and loss of consciousness.

• Have an audible carbon monoxide alarm. This will alert you if there is carbon monoxide in your home.

For gas safety advice or to find and check an engineer visit the Gas Safe Register website at www.GasSafeRegister.co.uk. Alternatively call the free helpline on 0800 408 5500.