We have a Buderus 600 boiler on a y-plan system which replaced the original 1980s boiler. Since it was installed it would only operate on either HW only or CH+HW. If we switched it to CH only then the boiler came up with an error code indicating a circulation problem.
I’ve spoken to a heating engineer about this and he thinks this is most likely because the hot water return joins in the wrong place. All the pipes are mostly concealed so it’s not possible to see exactly what is going on. He says there should be nothing teed into the return run after the hot water. Have I understood this correctly?
Another question – there is a 15mm and 22mm pipe teed into the flow quite close to the boiler. I think these pipes are the cold feed and vent to the F&E tank. The original boiler installation had them close to the boiler but the engineer said they are normally joined in the airing cupboard. I’m sure it would have been easier to have them in the airing cupboard originally but since the boiler was replaced they have been left connected close to it. Does it matter whether the feed and vent pipes are close to the boiler or should they be closer to the pump?
Before I start pulling up floorboards can anybody tell me if I am on the right track?
I’ve spoken to a heating engineer about this and he thinks this is most likely because the hot water return joins in the wrong place. All the pipes are mostly concealed so it’s not possible to see exactly what is going on. He says there should be nothing teed into the return run after the hot water. Have I understood this correctly?
Another question – there is a 15mm and 22mm pipe teed into the flow quite close to the boiler. I think these pipes are the cold feed and vent to the F&E tank. The original boiler installation had them close to the boiler but the engineer said they are normally joined in the airing cupboard. I’m sure it would have been easier to have them in the airing cupboard originally but since the boiler was replaced they have been left connected close to it. Does it matter whether the feed and vent pipes are close to the boiler or should they be closer to the pump?
Before I start pulling up floorboards can anybody tell me if I am on the right track?