W-B 42 CDI combi

[Doctor Drivel]

This boiler is pretty new on the market. It states no need for a by-pass. Does anyone know if it has a flow switch?

 

[Dan Robinson]

It uses a flow turbine, but if you look at the exploded diagram of the boiler one has to wonder - why?

 

[Doctor Drivel]

It uses a flow turbine, but if you look at the exploded diagram of the boiler one has to wonder - why?

Is the flow turbine on the cold water inlet? It appears to say that TRVs can be fitted on all rads.

 

[Dan Robinson]

Aahh I see where you are gettin at... sorry for some reason I thought you meant on the domestic side of things...


Standy by one...

 

[Dan Robinson]

Page 11 of the destructions says it MAY need a by-pass - so I owuld guess it uses temperatures to detect primary flow.

 

[Doctor Drivel]

Page 11 of the destructions says it MAY need a by-pass - so I owuld guess it uses temperatures to detect primary flow.

So, it may monitor flow and return temps and detect flow that way?

 

[ChrisR]

"An automatic bypass may be required,
(downstream of the pump), in order to maintain
the minimum flow-rate through the appliance."

Can't see any direct way it can measure flow.

 

[Doctor Drivel]

"An automatic bypass may be required,
(downstream of the pump), in order to maintain
the minimum flow-rate through the appliance."

Can't see any direct way it can measure flow.

The W-B website say it doesn't need a by-pass. Strange.

http://www.worcester-bosch.co.uk/index.php?fuseaction=product.detail&con_id=231282&detail_id=231289

Look under Features

 

[ChrisR]

swym!

 

[chrishutt]

swym!

Even the mighty Google doesn't seem to know what that means. Care to enlighten us?

 

[Dan Robinson]

DD, as you know the manuals mean more than the sales bumph.

 

[Rob]

Modulating pump and thermistor readings IWHT

 

[Dan Robinson]

IWHT

What?

 

[Rob]

i would have thought...i made it up

 

[namsag]

ITYD .