Hello. Would someone be kind enough to point me at instructions for configuring a BDR91 as a central heating relay? In the installation guide there are instructions for various configurations but not as a simple heating demand relay as far as I can see.
I have a non standard installation with a gravity fed hot water tank, there is a single flow pipe from the boiler which is split via a T piece to HW and CH and there are two returns, there is a pump on the return from the radiators. I would like the pump not to come one when there is HW demand only.
Currently the pump is connected to the boiler control BDR91 so it comes on when there is demand from CH or HW. I have a spare BDR91 I just need to know how to configure it to respond to CH demand only then I can move the pump to it. The only valve in the system shuts off the flow of hot water to the tank when there is no demand to prevent over heating, this is controlled by the BDR91 that came with the hot water kit.
Apologies if this is covered elsewhere, I have searched high and low for the answer with no success.
Other than this minor issue it all works perfectly.
Thanks in advance
Graham
I have a non standard installation with a gravity fed hot water tank, there is a single flow pipe from the boiler which is split via a T piece to HW and CH and there are two returns, there is a pump on the return from the radiators. I would like the pump not to come one when there is HW demand only.
Currently the pump is connected to the boiler control BDR91 so it comes on when there is demand from CH or HW. I have a spare BDR91 I just need to know how to configure it to respond to CH demand only then I can move the pump to it. The only valve in the system shuts off the flow of hot water to the tank when there is no demand to prevent over heating, this is controlled by the BDR91 that came with the hot water kit.
Apologies if this is covered elsewhere, I have searched high and low for the answer with no success.
Other than this minor issue it all works perfectly.
Thanks in advance
Graham
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