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Biomass Installation

  • Positioning The Biomass Boiler

    Biomass Installation

    The installation engineer will at first walk through with the customer, the details and locations of all equipment to ensure that the information taken in the site surveys are still accurate. In particular attention will be paid to flue, ventilation, pellet and boiler delivery route and hearth thickness/level.

    Biomass boilers are extremely heavy with large domestic boilers weighing upwards of half a tonne, a lot of thought and care has is put into the plan for how the boiler is going to be delivered and moved into position safely, securely and taking account of all the facilities and building regulations which have to be met. The units are usually delivered on a pallet by lorry with tail lift, the boiler is then positioned using pallet trucks, trolleys and rollers. On very rare occassions we may use specialist powered lifting equipment if the boiler is to go in difficult locations such as cellars.

  • Installation of the Flue and Ventilation

    Biomass Installation

    A Biomass boiler is a solid fuel boiler and as such requires a full height flue or chimney to extract the combustion gases safely in line with Building Regulations Part J. If an existing chimey is available this would be relined with stainless steel flexible twin wall liner to manufacturer approved diameter. If a suitable chimney is not in place a new stainless steel twin wall solid flue will be errected. Insulated twin wall flues are required, due to the high efficiency of the boilers the flue gases have a much lower tempreture which if alowed to cool further will reduce draft and icrease the likelyhood of condensation.

    Particular attention is paid during installation to minimise bends in the flue which restrict flow and make cleaning more difficult, additionally condensate drains and cleaning access are required. Depending on manufacturer specifications, flue draft stabalisers may also be needed.

    Ventilation is required for the boiler and also for the biomass pellet storage, the size of the ventilation will vary on boiler output and pellet storage size. Vent ducts or air bricks are installed to provide a permanent non mechanical air supply. These are fitted in locations which are unlikely to be blocked. A carbon Monoxide alarm is installed as the boiler and the pellets can potentially produce carbon monoxide.

    A flue data plate is fitted next to the flue or mains electrical cut out for the property.

  • Installation of the Bulk Pellet Store.

    Biomass Installation

    When designing a Biomass Pellet boiler system it is possible to opt for manual filling of a small attached pellet store or to opt to have a large bulk store fitted. With the manual filling option the customer fills the boiler every few days from bagged pellets which are usually delivered on tonne pallets. With a bulk store a large hopper with a minimum capacity of over three tonnes and footprint of appoximately 2m² is fitted. The minimum capacity is due to the pellets being delivered by lorry and blown into the hopper, the smallest allowable delivery is genearlly set at three tonnes.

    The Bulk store is usually connected to the boiler with a pair of large guage vacuum pipes (flow and return), this allows flexibility between the location of the hopper and boiler with up to 15m of distance between the two. It is not unusual for the pellet store to be located in an outbuilding or garage with the boiler located in the house. The hoses have a diamet of approximately 75mm and have a wide bend radious of half a meter to ensure minimum damage to the pellets in transit.

    The Bulk store and vacuum feed pipes are earthed due to the potentially of static build up during operation, also if in a seperate room to the boiler additional fixed ventilation and carbon monoxide alarms are to be fitted.

  • Installation of the Cylinder and Hydraulic Controls

    Biomass Installation

    As a biomass boiler operates on standard heating tempreture levels a new hot water cylinder is not neccesarily required but provides a good opportunity to upgrade it to an unvented system or solar thermal compatible unit. The engineers will remove the existing cylinder and install the new cylinder in its place if required.

    Most of the systems installed by CTS Renewables do not require buffer cylinders. A well made intelligent pellet boiler in a properly designed system will work more effectively and efficiently without a buffer cylinder. However, they are required if a log boiler is installed or in certain situations with multiple heating sources.

    Installed alongside the cylinder are the hydraulic controls including 2 port heating/DHW zone valves, high efficiency circulation pumps, magnetic cleaners, low loss headers (if required) and flow meters. All these components allow the boiler to distribute the heated water to radiators, underfloor heating systems and domestic hot water cylinders while constantly filtering and removing impurities from the circulating fluid.

    In all cases the boiler and heating distribution system will be unvented and pressurised so will have an expansion vessel instead of a header unit. In most cases the cylinder will also be unvented. Unvented systems are less susceptible to corrosion due to air in the system, unvented cylinders provide mains pressure hot water throughout the property.

  • Wiring the installation

    Biomass Installation

    Once the plumbing work is complete the biomass boiler and control unit needs to be wired. The boiler has full control of the heating system and uses and array of internal and external temperature and flow sensors to maximise the efficiency of the boiler often through weather compensation software. Effectively, the boiler will decide the optimum temperature for the heating circuit heat the property without wasting energy making the water hotter than it needs to, this will depend upon the external atmospheric temperature and the output of the heating circuit.

    A dedicated mains supply is provided to the control unit position close to the cylinder and also one to the boiler, the control unit communicates with the boiler with a single comms cable. If radiators are used a programmable control thermostat is installed in an open area such as a hallway, alternatively if an underfloor heating system is in place a "run" signal is taken from the underfloor heating control unit to activate the heating system.

  • Filling, Testing and Commissioning

    Biomass Installation

    Initially the system is filled and pressurised with water only to check for leaks, run the pumps and flush the system. Once all the joints are checked and the pressure remains at a constant the system is filled and pressurised with a mix of water and inhibitor.

    Various "field" settings are programmed into the boiler which individualise it to the specific requirements of the installation and the property, all the sensors and components are individually tested, the system is then run for a period of time to test heat output to the radiators/underfloor heating and the cylinder. Once all these procedures are complete, any required pipe insulation is fitted alongside the completion of all paperwork.

    The whole system is now fully commissioned to MCS standards, with all the results submitted to the government body “Gemserve” so an MCS certificate can be issued to enable you to claim the RHI. This process can only be undertaken by MCS approved companies like CTS Renewables, and is of vital importance for you to get a return on your investment.