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Woodpecker operation   Wood Pellet Heating    Orkney Installation

Orkney Biomass Boiler Installation

 

  

BBC Radio Orkney interview on 24 September 2008, with Gerry Cross and Richard Gauld discussing the installation of the biomass boiler.

The Woodpecker Cosyman was selected for the installation due to its integrated nature, and the robust and self-contained structure.  Orkney can be a harsh location in winter, and external structures need to be able to cope with extremes of weather, with very windy conditions common throughout the year.

The installation at this property required a crane to lift the boiler into the garden from a public road.  In some ways this has been an awkward installation, as normally it should be possible to deliver the unit directly to the site using a low-loader or similar vehicle.

   

Heddle's Crane to the rescue!


 

It was originally intended that the boiler would be fitted on the site of the oil tank in the garden of the property, however it was realised that this would require the external flue to be bolted onto a neighbours wall.  It was therefore decided that the unit would be located inside a shed, adjacent to the property.  With hindsite, construction of a boiler house was the best decision, as it has become evident that a dry, wind free location has major advantages, particularly when topping up the wood hopper; the fuel has remained dry over the wettest months of the year, and there is no risk of the lid and panels of the boiler blowing open.  Locating the unit in a shed or out-building has a secondary benefit, in that advantage can be taken of the residual heat given off from the pipework and flue - a pulley has been installed to allow clothes drying in rainy days.

 
   

 

   

 

The site has to be prepared in advance, and a solid plinth is needed to support the boiler.  We put in a concrete platform in this case, however a stone or well-compacted gravel base should be fine.  The unit has to be connected to the existing plumbing and electrical system in the house, with supply and return water pipes linking into the existing radiators, and a switched and non-switched electrical supply from a standard time clock, in this case located in the kitchen.  The water pipes require good standards of insulation to avoid heat loss in the transition from the boiler to the house.    

 
 

 

We have also added room and cylinder thermostats, linked to control valves,  to ensure the system runs at its most efficient.  The existing radiators all have thermostatic valves, allowing different room temperatures, with the room thermostat located in the main hall.


The commissioning of the boiler went very smoothly, with the removal of the old oil-fired boiler the most difficult part of the process.  The external oil tank has also been removed, replaced with a wood pellet store with enough capacity for six months of operation. 

 Operations

 The boiler worked first time, and following final commissioning and adjustment, the system has provided excellent levels of heating throughout two winters, including the coldest December for 50 years.  We have been very satisfied with operations, with the first year of operations discussed on the BBC Radio Orkney Hoose Wark programme: Woodpecker operation.  

 

Woodpecker operation   Wood Pellet Heating    Orkney Installation

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