can anyone help with a diagram for s plan heating systems with two pumps one for hot water and one for heating never seen this before would be most gratefull thanks
s plan heating system with two pumps
- Thread starter sparkyphill
- Start date
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Is the H/W circuit pump a smaller one that's joined onto the C/H pump by a crane union?
If it is it sounds as if it's the old SMC guaranteed warmth system.
An excellent system!
not sure the pump for the hotwater is in the airing cupboard with the valve and cylinder stat and the pump for the heating is next to the boiler with the valve and programmer thanks for replying
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Just done a quick search on google for it and if it is the above you are in luck because you can scroll down at this link and find the wiring diagram here.
http://www.gasman.fsbusiness.co.uk/fully_pumped_systems.htm
I'm gonna print it off for my own records too!
http://www.gasman.fsbusiness.co.uk/fully_pumped_systems.htm
I'm gonna print it off for my own records too!
no the pumps are the same size and are plumbed into the pipework for heating and hotwater wired hundreds of s plans but never with two pumps not sure how to run them seperately when they are both connected to the boiler switchlive thanks for your reply
as already posted this will do any twin pump system
http://www.gasman.fsbusiness.co.uk/images/SMC Twin Pump.bmp
http://www.gasman.fsbusiness.co.uk/images/SMC Twin Pump.bmp
thanks for that looked through it all but found no s plans with two pumps
thought that was odd myself im just a sparks all the plumbing and electrics in the airing cupboard are existing a new boiler has been fitted in a new position and the existing wiring downstairs has been stripped out i found the old wiring center and connected to that was a contactor have to ask the plumber thanks for your reply
Sounds iffy having 2 valves and 2 pumps, but from the link:
http://www.gasman.fsbusiness.co.uk/images/SMC Twin Pump.bmp
connect both greys to perm live, as normal.
connect HW orange to 8.
move black from 8 to spare (11)
con HW brown to 11
CH orange to 6.
move violet from 6 to spare (12)
con CH brown to 12.
obviously the blues to neutral and earth to earth.
http://www.gasman.fsbusiness.co.uk/images/SMC Twin Pump.bmp
connect both greys to perm live, as normal.
connect HW orange to 8.
move black from 8 to spare (11)
con HW brown to 11
CH orange to 6.
move violet from 6 to spare (12)
con CH brown to 12.
obviously the blues to neutral and earth to earth.
sorry didnt get your message till now thanks for your help this is bad for a sparks to say but i really think the plumber has ****ed this up the boiler needs an overrun and the pump is connected to the boiler terminals how am i supposed to connect two pumps to that set up ive looked at honeywells web site and talked to you guys and such a heating system doesnt exist none of the diagrams match whats electrically here all it needs is a y or s plan system its a normall domestic house why would a plumber put two pumps in a normal house?lol
Hi I already done a couple of drawings in another post that may be of some help
//www.diynot.com/forums/viewtopic.php?t=235412
not had time to add an over run facility yet and at at works do tonite but will have time tommorrow at some point
what make/model of boiler do you have?
Matt
//www.diynot.com/forums/viewtopic.php?t=235412
not had time to add an over run facility yet and at at works do tonite but will have time tommorrow at some point
what make/model of boiler do you have?
Matt
1
1CANHELP
Sparkyphill,
The new boiler that has been fitted, what make model is it? Pump overrun is normally only required for low water content heat exchangers some of the heat only boilers dont need pump over run due to the materials used in the manufacture of their heat exchangers.
The two pump system was quite normal in new builds in the early nineties. Consisted of heat only boiler, open vented thermal store with a mains pressure coil for domestic hot water. THERE were never any motorized valves fitted as they are not needed when using two pumps.
Firstly, pump overrun on modern domestic boilers is ALWAYS controled via the pcb and the pump would be wired to the relevant terminals on the boiler, the boiler will also require permanent live.
Secondly It does sound like the plumber and I use the word very lightly has made a pigs ear of it. I would suggest you ask him where he qualified and I bet..
1. 6Wk to 12 month plumbing course.
or
2. 12 month gas course and decides to try his hand at plumbing and heating.
Either way he is in our game a course cowboy and this is indicative of the standard of work/experience you get from these idiots along with 5 day part p1sh or domestic installer trained electricians.
AND why are you asking for advice on a diy forum, 95% on here ARE course cowboys mooching around for advice to supplement there lack of experience due to not completing an APPRENTICESHIP, the rest well..........just daft diyers who are too tight fisted to pay for a professional to do the work.
Tell me the boiler and I'll tell you how it should be plumbed and wired correctly, I'm in an extremely good mood today as my business has just gained an extremely profitable 3 year contract for heating, bathroom and electrical rewires.
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