Boiler Servicing is a crucial step in keeping your heating system in good working order. It’s similar to an MOT for your car but more focused on individual boiler parts.
Faulty or poorly maintained boilers can pose a real health risk through carbon monoxide poisoning. But with a service from a qualified heating engineer, this is easily avoided.
A boiler service involves many different checks to ensure that the gas appliance is safe to use. It’s important to have this done regularly so that any problems can be identified before they become serious.
If a problem is discovered during the boiler servicing process, the engineer will discuss it with you and recommend any necessary repairs. It’s always best to get these done as soon as possible to prevent the problem getting worse and putting you or your family at risk.
Safety is the main focus of a boiler service, and the engineer will check that all safety devices are working properly. This includes checking for unusual smells or dark marks around the appliance that could indicate a leak of gas or carbon monoxide. The engineer will also check the flue and ventilation channels to make sure they are clear of obstructions and that harmful gases are being expelled safely from your property.
The safety check usually starts with a visual inspection of the boiler and the gas appliances in your home. The engineer will look for any signs of distress or wear and tear on the appliance, as well as making sure that all pipe connections are secure. They will also check that the boiler is connected to a carbon monoxide detector and that it is functioning correctly.
A boiler can produce a variety of sounds when it is working, but any rattling or banging should be investigated immediately as this may be a sign that something is wrong. They will also listen for any whirring or clunking noises that could indicate the circulating pump is worn out and needs replacing.
A safety check will also be carried out on any other gas appliances in your home that you have, such as an oven or hob. They will look for any signs of damage or distress, and make sure that they are all connected securely to the central heating system and that the flue is clear. They will also check the air supply to each of these appliances and test their operation controls to make sure that they are still working correctly.
Parts Check
This is where the engineer will get under the hood and look at all of the boiler parts. This will include checking that all the electrics are working correctly and if everything is vented properly. They’ll also check that the heat exchanger is clean and not damaged, as a dirty boiler can lead to rust and corrosion within the system.
They’ll also check that all the internal components are working as they should, which includes the safety sensors. They’ll test the temperature of the flue gases to make sure they’re safe and that they’re within a certain range. They’ll also use a gas probe to test the pressure of the gas and ensure it’s safe.
Another important check during a boiler service is to ensure that all of the combustion seals are intact and not damaged. These are essential for the safety of your home and the protection of your family against carbon monoxide poisoning.
The engineer will also use a gas analyser to determine how efficient the boiler is, which is another important factor in ensuring your safety. They’ll test for any CO or other dangerous gasses in the flue gases and make sure they’re within a safe range.
One of the most common reasons for a breakdown or repair is that the boiler isn’t working as efficiently as it could be. This is usually caused by a build-up of debris within the system, which can lead to poor performance and costly repairs. This is why a power flush is often recommended as part of a boiler service.
Keeping your boiler well-maintained will help to improve its efficiency, which in turn can save you money on energy bills. Boilers that aren’t maintained can lose up to 15% of their efficiency over time, which means you’ll be paying more for heating your home.
Although some homeowners see boiler servicing as an unnecessary expense, it’s vital to keep your boiler in good condition to ensure it’s safe and works as efficiently as possible. It’s best to book a boiler service in the summer, as this will ensure your boiler is ready for winter and will be able to keep you warm throughout the colder months without the need for any emergency repair costs.
Flue Gas Analysis
Flue gas analysis is an essential tool in industries that involve combustion processes such as power generation, manufacturing, crematoriums and heating & cooling. By measuring the concentration of various gases, industrial users can optimize combustion processes, reduce emissions and adhere to environmental regulations. SICK offers a broad range of highly versatile instruments that use reliable measurement methods, enabling users to select the perfect solution for their specific needs.
These instruments can either be extractive systems that take readings from a duct, where the probe is pulled out of the system, or line-of-sight sensors that measure at the point of contact, allowing for optimal sensor placement within the flue. The latter configuration is ideal for detecting leaks in the air heater or at a duct transition, which are not easily accessible with an extractive system.
In addition to the excess oxygen reading, which provides the operational set point for the air-fuel ratio at the burner, flue gas analysis also features a combustibles detection and carbon monoxide (CO) measurement. Insufficient CO or combustibles levels at the burner can lead to incomplete combustion, which is costly to the user and to the environment. Flue gas analysis allows operators to thoughtfully lower the oxygen level at the burner, thereby minimizing fuel consumption and pollutants.
If the CO level in the flue gas is above 9 ppm (parts per million) for gas appliances or 5 ppm for oil or solid fuel, then an investigation must take place, with the room closed off and any occupants evacuated. This is because CO can be a fatal gas for humans.
The gas safety engineer will also check the flow of the flue gasesses from the appliance and that the boiler is safely fitted with a secure and safe flue terminal. He will also check that the gas pressure is optimum, as this helps to ensure that the water in your radiators comes out hot. If the engineer detects a problem with this he will advise you of what to do next. This could include a new gas installation, a replacement part or further testing.
Safety Device Test
While human operators provide some level of protection and awareness, boiler safety equipment is a final safeguard against catastrophe. When water is boiled to steam it expands 1400 times its size and if that expansion isn’t contained within the controlled environment of a boiler system, it can cause devastating damages. Regular inspection and maintenance of boilers isn’t just a good idea, it’s the law in many states. Boiler inspectors examine all boilers on a mandated schedule. During this process, they remove all plugs at the water column and open the low water fuel cutoff controls to allow them to inspect the inside of the float chamber. They also test all sensors on the boiler to make sure they are working properly.
Stack temperature gauges monitor the temperature of flue gases leaving the boiler. A high stack temperature indicates that soot or scale is building up on tubes or that baffling in the boiler has deteriorated or burned through, allowing hot gases to bypass heat transfer surfaces. These conditions usually develop slowly over time and go undetected by the boiler operator. Stack temperature gauges help identify unsafe conditions and prevent them from becoming dangerous operating conditions.
Safety valves are installed to prevent the over-pressurization of a boiler, tank, heat exchanger or associated piping. They are typically interlocked with other devices in a boiler system to ensure all of them operate correctly. When a safety valve isn’t functioning properly, it can release high pressure steam which can damage components and create a potentially dangerous situation for the operator. Safety valves are tested to ensure they are functioning properly by lifting the try lever with the boiler at 75% of its set pressure and discharging steam for 10 seconds. If the safety valve isn’t opening when the lever is lifted, it’s not functioning correctly and needs to be replaced as soon as possible.
Other tests that may be conducted include an earth continuity test which ensures that the boiler is connected to its power supply via a 3 amp fused plug top switch and not a mains spur. A multimeter will be used to read the resistance (in ohms) between L and N on the plug top pins. A faulty connection could lead to a volt drop which could affect the operation of the boiler. The engineer will also check the gas pressure in the boiler, ensuring it’s at an optimum level for maximum efficiency.