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I am preparing to fit a replacement central heating water pump. Please see Diagram A, which shows the main components of the existing central heating and indirect hot water installation.
The existing installation uses a conventional gas boiler (Glo-worm SpaceSaver), a hot water cylinder with a heat exchanger, a single pump and two cisterns (one of which is shown on the diagram A.) So far as I know, the boiler does not have over-heat protection.
All pipes are 22mm throughout except for an open discharge over the cistern. This is a 15mm branch from the 22mm F/E pipe. This feature bothers me, given what I have read here that boiler safety relies on a dedicated open vent from behind the pump.
I would like to ask if the assembly shown on diagram A is a recognised working. By the way, any other advice about fitting a new pump will also be gratefully received.
The existing installation uses a conventional gas boiler (Glo-worm SpaceSaver), a hot water cylinder with a heat exchanger, a single pump and two cisterns (one of which is shown on the diagram A.) So far as I know, the boiler does not have over-heat protection.
All pipes are 22mm throughout except for an open discharge over the cistern. This is a 15mm branch from the 22mm F/E pipe. This feature bothers me, given what I have read here that boiler safety relies on a dedicated open vent from behind the pump.
I would like to ask if the assembly shown on diagram A is a recognised working. By the way, any other advice about fitting a new pump will also be gratefully received.
