Biomass

[Chalmers7]

What type of mixing valve is used on a biomass install, what's there purpose ?

 

[SimonJohns]

It's to maintain a boiler temp of 50c.

Usually a thermostatic controlled 3 port

 

[Chalmers7]

It's to maintain a boiler temp of 50c.

Usually a thermostatic controlled 3 port

Is there any particular make that I should use?

Also this biomass and oil boiler system shows a low loss header the biomass is 199kw and has 500l of water content, should a buffer be used? The low loss header is 5" by 2.3m long

 

[peteheat]

Different manufacturers want different return temperatures, check with retailer or readv the manufacturers instructions, get it wrong and the boiler can need to be replaced within 5 years.

Again check the buffer requirements with the manufacturer, a boiler that size may need a buffer depending on heat dissipation.

 

[Chalmers7]

Another wee question, thanks for your comments, but I've never know a biomass flue be right to connect to a oil boiler flue, but on the hargassner schematic it shows both flues together but a sensor must be fitted, have you ever came across that before?

 

[peteheat]

Another wee question, thanks for your comments, but I've never know a biomass flue be right to connect to a oil boiler flue, but on the hargassner schematic it shows both flues together but a sensor must be fitted, have you ever came across that before?

No, in fact the golden rule with flues is never fit two appliances to one flue, unless they mean to connect to an old type oil boiler flue.

One I did come across is a flue with what appeared to be another flue beside it acting as an air intake, any chance the sensor is a lambda probe?

That might explain the two pipes one for POC and the second as an air intake the fan speed controlled by the lambda.

 

[KrisDLloyd]

The 'creme de la creme' and my suggested manufacturer for biomass installations would be ESBE