this is an all too common problem that has started to rear up lately, we have seen quite a few bad systems. 3kw for hot water in a house sounds very low to me. The schematic for the application is laughable. I hope you eventually get a system that works correctly but i would chase them via your own solicitors for the compensation and loss of earnings etc.
OK, so we seem to be getting somewhere with NAPIT. The current system is a 40kw heating a 2100 litre buffer tank. What's anyone's thoughts on the below, baring in mind our heat demand for the properties is currently around 56kw/h not including heat loss? We are going to Clevedon to have a look at these boilers in the next week or so. Haven't replied to NAPITS email yet. We have asked them that we feel it would benefit all parties if NAPIT used a third party to look over the design of the new installation to make sure its correct this time but the response we get is essentially a no.
We have the feeling and advice that a 80kw boiler would be a better solution and that 3200 buffer store is a bit too small for a 60kw burner.We don't want to rock the boat at this stage and scare the installers off though so need to word things very carefully.
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Please find the below feedback that I have received suppliers
“I have been trying to get a boiler that can be delivered in the next few weeks, I have spoken to several suppliers and the best option so far is
60kW Angus Super Wood Log Boiler
Here are some of the benefits of the Angus Super
- Typically 35% heavier than others in its range as they are manufactured with thicker boiler steel plate for increased wear resistance/life expectancy (our boiler has a 6mm inner and 4mm outer as opposed to 5mm inner and 3mm outer boiler steel plate).
- They have one of the highest heat efficiency ratings (92% as opposed to 85% standard) for a log gasification boiler allowing a longer burn cycle and reduced wood fuel consumption.
- Larger combustion chamber volume than others in its range allowing a larger wood fuel load.
- Larger log length from 500mm for 18kW to 1000mm Long for 80kW to 130kW.
- Ability to burn all types of wood and handle logs up to 10" Diameter.
- Handle feature to mechanically clean out any pitch in the heat exchanger tubes.
- Control panel can be altered as and when required to control the following;
- Regulate the temperature of the accumulator tanks
- Vary the temperature differential of the water in the boiler from that of the accumulator tank before switching to gasification mode.
- Alter the blow through interval for burning off the gases.
- Alter the blow through time for burning off the gases. Lower flue gas temperatures (less than 160 degrees for 25/40/60/80kW) as the water jacket surrounds the combustion chamber not only from all 4 sides but the base of the boiler as well). Along with a high efficiency rating this helps a lower running temperature of the stainless steel flue.
- Regulate the speed of the self-modulating fan.
- Wire a remote control so the control panel can be altered from another location.
-Antifreeze protection system. When the temperature decreases below 4 °C regulator the installation is protected against freezing by the automatic turning on of the pump.
-Overheating protection system. When the temperature rises to above 90 °C it will automatically turn the fan off and ensure the pump is kept turned on.
- Comfort facility system. The comfort system built into the regulator prevents against stone deposition within the pump rotor. The regulator automatically actuates the pump after the heating
season for about 30 seconds every 14 days. Operation of the pump in this mode is signalled by
flashing of the pump indicator light. The system begins to operate 1 minute after the regulator has switched on. Actuation of the pump in automatic mode causes re-counting of the 14-day period from the beginning.
All our log boilers are designed to burn softwood or hardwood between 15% and 20% moisture content.
It is advisable to use softwood for batch burning only or to use as a mix (maybe 15% maximum) with hardwood for creating an ember layer when running the boiler continuously where for large periods of the time the boiler is in slumber mode. Even if the softwood is below 20% moisture content it is not ideal to use full loading chambers of softwood and then run the boiler continuously in this situation. As the softwood is resinous you will have very low flue gas temperatures when the boiler is slumbering for long periods of time and this can lead to a build up of pitch inside the heat exchange tubes and on the inside of the flue. It is possible that the turbulators in the heat exchanges tubes can become jammed as shown by the fact that the heat exchanger cleaning handle will no longer move and the overall efficiency of the boiler will be detrimentally affected. Any treated wood (creosote, paint), MDF or chipboard should not be used in our log boilers due to the carcinogenic emissions.
Let me know if this would be suitable, we also need to install another 1000 litre buffer tank along side the existing buffer tank.”
Xxx have advised that they’ve located a UK Manufacturer in order to ensure that they have suitable customer care and a relatively quick turnaround.
Please let me know your thoughts and I will forward them onto xxxx, I will ideally need these via email so that we can document your feedback.
Kind Regards,