A DIY & home improvement forum. DIYbanter

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Go Back   Home » DIYbanter forum » Do - it - Yourself » UK diy
Site Map Home Register Authors List Search Today's Posts Mark Forums Read Web Partners

UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions.

Central heating pump size



 
 
LinkBack Thread Tools Display Modes
  #1  
Old October 20th 05, 09:17 PM
Mark
external usenet poster
 
Posts: n/a
Default Central heating pump size

Hello all,

I have recently added a further 3 radiators and an additional 14m
approximately of pipework to incorporate an extension.

I have been to a site where it indicates the flow required and the BTU that
the pipe size can manage etc but there was no indication of the pump
requirements. Apart from a "suck it and see" scenario is there anyway of
calculating the pump specifications? How do builders determine the correct
size pump for a new installation?

Mark


Ads
  #2  
Old October 20th 05, 10:16 PM
Aidan
external usenet poster
 
Posts: n/a
Default Central heating pump size


Mark wrote:
is there anyway of
calculating the pump specifications?


Yes. You calculate the required flow rate from the heat loss
calculations. You then calculate the frictional losses in the pipe work
along the index circuit (usually furthest rad fom the pump) from the
required flow rates, the pipe diameters, the pipe lengths, the number
of fittings, etc.. It's fairly tedious number-crunching.


How do builders determine the correct
size pump for a new installation?


They put in a UPS 15-50 Selectric. If that doesn't work properly, they
put in a 15-60 Super Selectric.

  #3  
Old October 20th 05, 10:27 PM
Aidan
external usenet poster
 
Posts: n/a
Default Central heating pump size


Aidan wrote:
Mark wrote:
is there anyway of
calculating the pump specifications?


See Appendix H of this:
http://www.cda.org.uk/megab2/build/pub33/33_2000.pdf

It gives data on pressure losses per m for pipes and the equivalent
length of fittings.

 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Central heating pump - help MattH UK diy 13 November 23rd 05 08:35 PM
Central Heating Pump MattH UK diy 3 September 23rd 05 04:41 PM
Heating design diagram (preliminary) John Aston UK diy 55 December 10th 04 08:31 PM
No central heating - HW only threewayvalve and tank therm John UK diy 7 September 29th 03 09:18 AM
Central Heating Pump john UK diy 3 July 4th 03 08:57 PM


All times are GMT +1. The time now is 05:00 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.SEO by vBSEO ©2010, Crawlability, Inc.
Copyright 2004-2014 DIYbanter.
The comments are property of their posters.