06-01-2012, 05:27 PM
Hi Gents, thanks for a very comprehensive set or replies which will take a little while to digest; it is a great relief to see some "Engineering" replies rather than "technician" or worse "sales" replies.
I had seen the adverts for modern condensing boilewrs with copper cylinders, but had thought them a form of Combi, thanks for the clarification David.
Comments on servicing noted!; also coments on modulating gas appliances.
Boiler is a Glow-worm 65/80 in a 5 bed house at 600ft ASL.
The present unit is a conventional flue type with an 8M chimney, located in the utility room with the appropriate gholes everywhere for combustion air. The room gets much warmer than needed, hence the thoughts on insulation.
The system is run with inhibitor and is flushed every 5-8 years and re-filled. The tank is an indirect type with seperate headers, fitted with top covers and min water surface.
The control valve system is home brew but to high standards. It shuts down both boiler and pump when all system demand ceases and does not leave the boiler on short cycle. The cylinder is fitted with high and low level DHW sensors.
The summer project is to add solar HW via an additional worm at the base of the DHW cylinder. At the same time the system will be fully flushed as there is presently some kettling; motorised valves will be installed in more accesssible positions and insulation will be improved, hence the request for thoughts on insulating the boiler waterjacket. The flue pipe S Stl will be left un-insulated as a heat source for the room.
The DHW cylinder is used with a timed immersion heater in summer as an energy saving measure, solar would also be of benifit at this time.
Any further thoughts/ questions?
Thanks, Ed
I had seen the adverts for modern condensing boilewrs with copper cylinders, but had thought them a form of Combi, thanks for the clarification David.
Comments on servicing noted!; also coments on modulating gas appliances.
Boiler is a Glow-worm 65/80 in a 5 bed house at 600ft ASL.
The present unit is a conventional flue type with an 8M chimney, located in the utility room with the appropriate gholes everywhere for combustion air. The room gets much warmer than needed, hence the thoughts on insulation.
The system is run with inhibitor and is flushed every 5-8 years and re-filled. The tank is an indirect type with seperate headers, fitted with top covers and min water surface.
The control valve system is home brew but to high standards. It shuts down both boiler and pump when all system demand ceases and does not leave the boiler on short cycle. The cylinder is fitted with high and low level DHW sensors.
The summer project is to add solar HW via an additional worm at the base of the DHW cylinder. At the same time the system will be fully flushed as there is presently some kettling; motorised valves will be installed in more accesssible positions and insulation will be improved, hence the request for thoughts on insulating the boiler waterjacket. The flue pipe S Stl will be left un-insulated as a heat source for the room.
The DHW cylinder is used with a timed immersion heater in summer as an energy saving measure, solar would also be of benifit at this time.
Any further thoughts/ questions?
Thanks, Ed
