F
flyboy
Most impressive, doitmyself,
I see where i went wrong! We will see how the new system performs (when the wiring controls get sorted, not impressed by the installer. I thought it a bit strange you could control the room temperature turning up the tank stat - got someone who understands wiring coming tomorrow)
The original system used natural gas and was fully pumped.
A company called Ravensbourne designed systems
for DIY and supplied the parts. I have had a look at the original plans and definately 28mm pipe was specified. I reworked all the calculations to check and had a design your own CH booklet with data and tables that I used. Checked many times that I had to use 28mm pipe - a pig to work with but salvaged it from the back boiler and had enough elbows and bends so that I did not need any pipe bending done. Your figures suggest I could have used 22mm! After all this time. Perhaps the original data I was using was not that good?
The whole CH and hot water side of the system cost £850 for parts. The only problems I had were with the Satchwell duovalve actuator (3 port system) - the plastic collar that fitted on the spindle cracked. £45 to replace, 15 years ago. The relay in the control box also packed up 5 years ago and cost £60.
Wonder if the new Greenstar will last 30 years?
I see where i went wrong! We will see how the new system performs (when the wiring controls get sorted, not impressed by the installer. I thought it a bit strange you could control the room temperature turning up the tank stat - got someone who understands wiring coming tomorrow)
The original system used natural gas and was fully pumped.
A company called Ravensbourne designed systems
for DIY and supplied the parts. I have had a look at the original plans and definately 28mm pipe was specified. I reworked all the calculations to check and had a design your own CH booklet with data and tables that I used. Checked many times that I had to use 28mm pipe - a pig to work with but salvaged it from the back boiler and had enough elbows and bends so that I did not need any pipe bending done. Your figures suggest I could have used 22mm! After all this time. Perhaps the original data I was using was not that good? The whole CH and hot water side of the system cost £850 for parts. The only problems I had were with the Satchwell duovalve actuator (3 port system) - the plastic collar that fitted on the spindle cracked. £45 to replace, 15 years ago. The relay in the control box also packed up 5 years ago and cost £60.
Wonder if the new Greenstar will last 30 years?
