This means that the system pressure is too low and you may see that the system pressure gauge indicates that the pressure in the system is below the 1 bar pressure and out of the green area.

To re-pressurise the system you will find a filling loop (metal braded flexible hose) on the underside or underneath the boiler with one or two tap connections at the either end of the filling loop.

The tap or taps should be opened a quarter of a turn and the water will start to refill the system (water should be heard filling the system). You should see the pressure gauge rise back up into the green area on the pressure gauge between 1 bar and 1.5 bar pressure.

Once the pressure gauge is in the green area turn the taps back to the off position and the water will stop filling the system. The lights should now stop flashing and the boiler will now operate. If the lights still flash, top fill up the system a little more but not over the green area.

(If you do fill the system too much and the pressure gauge is over the green area, just bleed water from a radiator until the pressure on the gauge goes down into the green area).

The Boilers incorporate a built in frost thermostat which automatically turns on the boiler and pump if the water in the boiler falls below 8 Deg C, providing the electrical supply is on and the selector switch is set to position 1 or position 2. The boiler will operate until the water temperature in the system reaches approximately 40°.

When the boiler is not required to heat the system anymore, the pump will continue to run for 60 seconds, so heat can be dissipated around the system. (The pump must be wired into the pump connections on the boiler. Note: Regular boiler only).

The boiler does not require any air vents for cooling in the room in which it is installed or when installed in a cupboard or compartment. The minimum clearances for servicing must always be maintained.

Note: A cupboard or compartment used to enclose the boiler must be designed and constructed specifically for the purpose, i.e. comply with the Building Regulations.

The lights on the boiler inicate various things, depending on there current states. (static, flashing, strobing etc) You can find out what the indicators mean for your boiler with our control panel troubleshooter

If your boiler was installed prior to 2003, you could save a third on your heating bills and reduce your home's CO2 emissions by 800 kilograms a year.

Our SolarSmart system is able to work even on cloudy days because it uses diffused radiation as well as direct sunlight. In the UK, it can supply almost all of your hot water in the summer and about a third during the rest of the year.

Reducing your room temperature by 1°C could cut your heating bills by 10%. Setting your water cylinder temperature to less than 60°C and fitting approved thermostatic mixing valves will also help save money.

The capacity of your existing boiler will have been matched quite closely to the size of your home – the floor space and the number of bathrooms – in order to achieve maximum efficiency. If you are just adding one radiator for a new conservatory you will not need to replace your boiler, but if more radiators and hot water are required you should contact a heating adviser to find out if a new boiler is needed.

Generally boilers can be sited wherever you like. All they require is flueing to the outside and to meet all building regulations.

High-efficiency condensing boilers are able to capture and use much of the heat that old non-condensing boilers waste and release into the atmosphere. Condensing boilers convert around 90% of fuel into useful heating, whereas old conventional boilers only convert around 60% and waste the rest. All new gas boilers in England and Wales must be condensing boilers.

Most components from old boilers are recyclable at local recycling centres that have provision to dispose of metals

Grants are available for a number of energy saving heating systems. To find what is available and if you are eligible visit the Energy Saving Trust website.

The maximum horizontal equivalent Flue length (after the boiler turret) is 12m for CD Models and 3 meters for HE models. Allow 1.3 meters of Flue length for each 90-degree bend, 0.9 meters of Flue length for each 45-degree bend.

The maximum equivalent vertical Flue length is 15 meters for CD models and 6 meters for HE models. 90 degree bends are not to be used. Allow 0.9 meters of Flue for each 45-degree bends.

Yes, On our condensing boilers you can fit 90 degree bends to a vertical Flue systems. Note: A 90° bend is equivalent to 1.3 m length of Flue. If it is necessary to use a 90° bend in the vertical Flue, ensure the Flue above it is sloped towards the boiler to ensure that all condensate is allowed to drain from the Flue. The slope must be a minimum of 25 - 30 mm per metre.

Notes:

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1. In addition, the terminal should not be nearer than 150 mm to the framework of an opening into the buiding, i.e. a window surround or door surround.
2. This clearance may be reduced to 25 mm without effecting the performance of the boiler. However, to ensure the condensate plume does not affect adjacent surfaces a clearance of 300 mm is preferable.
3. These clearances may be reduced to 25 mm without effecting the performance of the boiler. However, to ensure the condensate plume does not affect adjacent surfaces the terminal should be extended beyond gutters, pipes, eaves, balconies etc.
4. To reduce the possibility of nuisance to neighbouring buildings etc. it is recommended the terminal shouild not be less than 2500 mm from car parking spaces, building boundary walls, fences etc.

The Flue terminal must be exposed to the external air and the position must allow the free passage of air across it at all times.

If the terminal is fitted within 850 mm of a plastic or painted gutter or 450 mm of painted eaves, an aluminium shield at least 1m long should be fitted to the underside of the gutter or painted surface. A terminal must not be sited below 2.1 m where people have access to, such as public footpaths, access routes, patios etc. However, If the terminal is fitted less than 2.1 m above a surface where there is no public access, the terminal must be protected by a terminal guard.

Note: A terminal must not be sited under a car port root and in certain weather conditions the terminal will emit a plume of steam. If possible avoid positioning the terminal where this may cause a nuisance, i.e. positions A, D, G, H, J or M.

Check the minimum room temperature setting; this should be a low temperature setting e.g. 8° to 12°.

Some of the boilers already incorporate a by-pass, however where all radiators are fitted with thermostatic radiator valves it is recommended an automatic system by-pass is fitted.

Flushing of a central heating system in accordance with BS 7593 is carried out to remove contaminants such as flux residues, grease, jointing compounds, oxides produced by the corrosion process, bacteria and in hard water areas limescale.

If they are not removed, these contaminants form a harmful sludge in the system which reduces the efficiency of the system, causes noise and could potentially reduce the useful life of the appliance.

Water supplied via a water softener should not be used to fill any central heating system unless a corrosion inhibitor specifically formulated for the purpose has been added.

Moreover, softened water should not be used where the system contains aluminium under any circumstances.

Because the chemical composition of softened water is very variable, we recommend that filling a system with it should be avoided by turning off the softener whilst the system is filled, if possible.

A Combination boiler provides central heating and heats water instantaneously whenever you open a hot tap, so you don't need space for a storage cylinder and the hot water supply is endless. The temperature at the tap is dependent on the temperature of the mains supply and the Flow Rate.

Combination boilers are ideal for smaller one bathroom properties without the frequent and simultaneous use of sinks, showers, baths, washing machines and dishwashers. Because a Combination boiler heats water instantaneously as you turn on a tap, it helps save on fuel and helps save on space as you don't need a cylinder to store hot water until it's needed.

Traditional boilers (also known as heating only boilers) are used for the central heating system. Traditional boilers can deliver hot water to several taps simultaneously via an indirect hot water storage cylinder which is required as well as the boiler.

A System boiler is used for the central heating system; it is factory fitted with all the components needed for use with an external indirect cylinder for the production of domestic hot water.

System boilers neatly incorporate a number of components found outside of the boiler on traditional installations - the pump for example. Another is the Expansion vessel, which replaces the tank in the roof-space. So installation is easier and quicker and the risk of burst pipes in winter is eliminated.

A high efficiency boiler is the most efficient boiler available. It converts more than 88% of the fuel it uses into heat, compared to 72% for conventional types.

High efficiency boilers have either a larger or second heat exchanger which saves the heat which would normally escape up the Flue in normal boilers. This reduces the temperature of the Flue gases to a point where water vapour produced during combustion is 'condensed out'.

High efficiency boilers are established products and can be fitted to most new and old heating systems. They are easy to install and can be bought for oil and gas-fuelled homes, even LPG (liquefied petroleum gas). These boilers are often no larger than conventional boilers. You can buy high efficiency boilers as either combination boilers, which heat up hot water on demand, or conventional system boilers, where a separate hot water cylinder is required.

A condensing boiler is the most efficient boiler available. It converts more than 88% of the fuel it uses into heat, compared to 72% for conventional types.

Condensing boilers have either a larger or second heat exchanger which saves the heat which would normally escape up the Flue in normal boilers. This reduces the temperature of the Flue gases to a point where water vapour produced during combustion is 'condensed out'. Hence the name 'condensing boiler'.

Condensing boilers are established products and can be fitted to most new and old heating systems. They are easy to install and can be bought for oil and gas-fuelled homes, even LPG (liquefied petroleum gas). These boilers are often no larger than conventional boilers. You can buy condensing boilers as either combination boilers, which heat up hot water on demand, or conventional system boilers, where a separate hot water cylinder is required.

We strongly recommended that your boiler be serviced annually. Your guarantee will become void if you don't have your boiler serviced annually, should the fault be such that it would have been recognised in the normal annual service.

The manufacturer's guarantee refers solely to the appliance supplied.

For example: If you have had a new boiler added to your existing central heating system and it is leaking causing regular introduction of fresh water or be contaminated with sludge due to improper installation (lack of inhibitor or proper flushing out), the operation of the boiler will be affected.

In such an instance the central heating system may detrimentally affect the performance of the boiler and therefore invalidate the boiler guarantee.

When a boiler is installed on an existing central heating system, it is essential that the system be chemically flushed out to remove any build up of 'sludge' (generally iron oxides). The system should then be refilled and treated with a corrosion inhibitor / protector.

Failure to carry out this procedure (as specified in the Benchmark Central Heating Log Book) during installation may cause the new boiler to be contaminated by debris from the existing system. Because 'modern' boilers hold less water and are much smaller than their predecessors, they are more liable to be affected by debris in the system: heat exchangers, pumps or divertor valves are most at risk.

Also, the guarantee of the boiler can be deemed void if the debris from the old system damages your new boiler.

We offer an AfterCare (with 2 levels of cover) product which will extend the warranty of the particular boiler you are thinking of purchasing.