Hi
Thought I would try and run this past you lot.
I have a conventional oil vented central heating system. I am installing a wood burner with back boiler. It is in an bungalow so only a low height water loop.
I have a fitting kit with heat exchanger from the maker of the burner that bridges the two vented circulation loops.
I have run 28mm pipes from the pre and post boiler pipes to the heat exchanger.
The initial plan was the resistance of the 30m loop back through the loft to the heat exchanger would mean when the oil is on and burner not, the system would flow as before.
When the burner is on it will suckling up from the cold return and pass it back to the other side of the outflow from the oil boiler.
Since doing this i have contemplated having a check valve in the loop so that when the wood burners pump is on it does not need the current pump to be in to prevent back flow.
my questions:
1) how much will a check valve restrict flow in the conventional loop. Is this a better option or is the dual pump a better method? (I assume it does it reduce the diameter of the pjpe)
2) I have had to run pipes up and over a joist in the attic with a shallow inverted u. will this create an airlock and does it need a air release tap the system here?
I will get a picture up to make this explanation make sense in a bit
Thought I would try and run this past you lot.
I have a conventional oil vented central heating system. I am installing a wood burner with back boiler. It is in an bungalow so only a low height water loop.
I have a fitting kit with heat exchanger from the maker of the burner that bridges the two vented circulation loops.
I have run 28mm pipes from the pre and post boiler pipes to the heat exchanger.
The initial plan was the resistance of the 30m loop back through the loft to the heat exchanger would mean when the oil is on and burner not, the system would flow as before.
When the burner is on it will suckling up from the cold return and pass it back to the other side of the outflow from the oil boiler.
Since doing this i have contemplated having a check valve in the loop so that when the wood burners pump is on it does not need the current pump to be in to prevent back flow.
my questions:
1) how much will a check valve restrict flow in the conventional loop. Is this a better option or is the dual pump a better method? (I assume it does it reduce the diameter of the pjpe)
2) I have had to run pipes up and over a joist in the attic with a shallow inverted u. will this create an airlock and does it need a air release tap the system here?
I will get a picture up to make this explanation make sense in a bit