Ask The Trades - Boiler bypass plumbing diagram

Welcome, Guest. Please Login or Register

	Apr 20^th, 2024, 3:31pm
View recently thanked users View top thanked users

Quote: The lottery is a tax on people who are bad at maths - Ambrose Bierce (1842)

Ask The Trades › DIY Forum › Plumbing Questions › Boiler bypass plumbing diagram

(Moderator: thescruff) - (Moderator Group: Board Moderator)

< Previous Topic | Next Topic >

Pages: 1 2

Boiler bypass plumbing diagram (Read 18532 times)

thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Boiler bypass plumbing diagram Reply #17 - Nov 25^th, 2004, 10:52pm Make and model of boiler is required. scruff
Back to top	IP Logged

Victorious1_1 Junior Member Offline Posts: 22 Total Thanks: 0 For This Post: 0 Gender:	Re: Boiler bypass plumbing diagram Reply #18 - Nov 26^th, 2004, 1:24am scruff, it's an NY Thermal, Legacy L-150 boiler. Bripl, why do you say that it would be more cost effective to convert to a two pipe system? Isn't the bypass simply a matter of a couple of T's and a bypass valve? Vic
Back to top	IP Logged

bripl GDPR opt-out Total Thanks: 0 For This Post: 0	Re: Boiler bypass plumbing diagram Reply #19 - Nov 26^th, 2004, 3:31pm yes it is just a few tees and a valve but how will you regulate it a good condensor will save money only if the controls/sys are set up correctly,you would not fit an f1 engine in a road car without carrying out a few safety upgrades would you?
Back to top	IP Logged

Wheel-nut

GDPR opt-out

Total Thanks: 0
For This Post: 0

Re: Boiler bypass plumbing diagram
Reply #20 - Nov 26^th, 2004, 6:27pm

Vic, There's something amiss here.

Assuming that this is a Condensing Boiler, I don't understand why it requires the return water temperature to be a MINIMUM of 160 degrees F.

Condensing boilers usually require a LOW return water temperature which facilitates the condensation of the flue gases on the cold return water end of the Heat exchanger.

In DHW mode, the primary circuit is diverted through the DHW Heat exchanger so maling the temperature of the return from the Heating Circuit irrelevant.

The Bypass is usually used to maintain some circulation through the Primary Heat Exchanger when the heating zone valves ot TRV's shut down so that the water doesn't boil in the Primary Heat Exchanger.

« Last Edit: Nov 26^th, 2004, 6:28pm by Wheel-nut »

IP Logged

thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Boiler bypass plumbing diagram Reply #21 - Nov 26^th, 2004, 6:33pm What has gone wrong is the lack of detail, I.E. this is an American boiler and installations are completely different to ours. Yes you need a bye-pass line and valve which should be sited close to the flow and connect to the return on the input side of the pump. further info now available. scruff
Back to top	IP Logged

Victorious1_1

Junior Member

Offline

Posts: 22

Total Thanks: 0
For This Post: 0

Gender: male

Re: Boiler bypass plumbing diagram
Reply #22 - Nov 26^th, 2004, 7:29pm

So sorry guys, I should have stated up front that this boiler is Canadian made for use here in Canada.

The reason the manufacturer wants the return temp. maintained at 160 F. is to prolong life of the steel boiler and to be able to provide hot water thru the domestic tankless coil in the boiler.

So, now that I'm being understood clearly, does anyone have a plumbing diagram or link that would illustrate how the bypass would best be piped?

Vic

IP Logged

thescruff

Global Moderator
Trade Member
Author

Offline

Who said plumbing was
easy.
Posts: 6037

Total Thanks: 147
For This Post: 0

Gender: male

Trade: Plumber

Re: Boiler bypass plumbing diagram
Reply #23 - Nov 26^th, 2004, 7:40pm

[quote author=Victorious1_1 link=1101318798/15#22 date=1101497376]So sorry guys, I should have stated up front that this boiler is Canadian made for use here in Canada.

The reason the manufacturer wants the return temp. maintained at 160 F. is to prolong life of the steel boiler and to be able to provide hot water thru the domestic tankless coil in the boiler.

So, now that I'm being understood clearly, does anyone have a plumbing diagram or link that would illustrate how the bypass would best be piped?

Vic [/quote]

No probs I had a sneeky feeling we were'nt talking England, Name that boiler and all is clear.

http://www.nythermal.com/Products/boilers/gas/legacy.htm

or send me an email and I'll post the pdf installation guide.

Ps, the reason for the high return temp is to keep the boiler above dhw temperature and to avoid corrosion.

scruff

« Last Edit: Nov 26^th, 2004, 7:44pm by thescruff »

IP Logged

Victorious1_1 Junior Member Offline Posts: 22 Total Thanks: 0 For This Post: 0 Gender:	Re: Boiler bypass plumbing diagram Reply #24 - Nov 27^th, 2004, 2:04am Thanks a lot guys, especially you scruff, very much appreciated. I'll let you know how it all works out in the end. Vic
Back to top	IP Logged

thescruff Global Moderator Trade Member Author Offline Who said plumbing was easy. Posts: 6037 Total Thanks: 147 For This Post: 0 Gender: Trade: Plumber	Re: Boiler bypass plumbing diagram Reply #25 - Nov 27^th, 2004, 10:15am Have noticed the drawing in one part is wrong on their site perhaps you should email, and i will correct it. scruff
Back to top	IP Logged

Victorious1_1 Junior Member Offline Posts: 22 Total Thanks: 0 For This Post: 0 Gender:	Re: Boiler bypass plumbing diagram Reply #26 - Nov 27^th, 2004, 11:01pm You've got mail scruff, thank you. Vic
Back to top	IP Logged

Pages: 1 2

(Moderator: thescruff) - (Moderator Group: Board Moderator)

< Previous Topic | Next Topic >

Ask The Trades › DIY Forum › Plumbing Questions › Boiler bypass plumbing diagram