Discuss New CH system underpowered/ wrong layout? in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Thanks vern, don't know much about WB (only that they are hard to work on LOL) much easer to have these adjustments on a combi rather than heat only but still it must have an effect if/when the heating load is so low doesn't it ?
I have said it before but here goes COMBI'S ARE EXEMPT FROM WHOLE HOUSE HEAT CALCS!.......
due to many reasons but the main one is that their outputs are based upon hot water production, obviously this should be matched to incoming mains water pressure and gas runs from a responsible installer but often are not!
To get round this good manufactures get round this by allowing range rating.
Worcester bosch get around this on the junior and Si with a code plug that down rates from 24kw to 12 kw, the CDi can be adjusted from 30kw to around 9 kw on 38 and 42 CDi and 30 kw to 7 kw on 29 and 34 Cdi (this can only be accessed via installer menus, I am not posting how as the menu contains all stuff that should not be touched unless you are trained by WB, pump maps, turbine delays, and much more!
the 38 Cdi is actually 40 kw on DHW NOT 38 marketing bluff as not to pull sales from 42 cdi
i actually look after some trendy apartments that have 42cdi's and 2 rads and a towel rail! 42 kw for hot water due to silly sized baths!
Yes ......Very interesting. Does this mean just the heating output and not the hot water heating rate can be downrated?
Correct get your installer back......Very interesting. Does this mean just the heating output and not the hot water heating rate can be downrated?
Is the boiler continually turning on and off while the house is heating up?
Did the installer measure the incoming cold water flow rate and dynamic pressure before recommending a 38kW boiler?
Reply to New CH system underpowered/ wrong layout? in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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