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Need wiring diagram to include: Underfloor heating downstairs (wet system,polyplumb) combi boiler for the heating and hot water

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  • wj_electrics Oct 30, 2008

    Underfloor heating is:master 4 zones PB1ZP(polyplumb)



    Combi boiler is:BAXI,Duo-tec combi HE

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Please mention model number of the Air Conditioner?





Posted on Oct 30, 2008

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Hi,
could you provide the exact model number or the product you need the wiring diagram for



Thanks
Proton

Posted on Oct 30, 2008

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WHEN MY NAVIEN COMBI BOILER GOES TO DOMESTIC USE THE AIR HANDLER DONT SHUT OFF UNTIL IT GOES BACK INTO HEAT MODE DONT KNOW WITCH 2 WIRES TO BRING TO THE NAVIEN WITCH HAS A SPOT NEXT TO TT SAYS A/H


I don't see the above problems being of help because it's not a heat pump or a issue about a fan switch. This is a stat and system wiring issue.
Here's a link to a proper wiring diagram.

https://www.dropbox.com/s/808zsozmkxce7fu/CH_NCB%20AHU%20Wiring.pdf
/uploads/images/when-navien-combi-boiler-goes-domestic-34752482-3-1.jpg

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Need to know how to switch off hot water by combi boiler worcester bosch 240 to be able to fix leak on pipe downstairs


its the vavle 3 one in from the left its a 15mm pipe and there will be a iso vavle what you can turn with a flat point screwdriver and that will turn off the main water to the boiler these are the manual
http://www.worcester-bosch.co.uk/homeowner/literature/discontinued-boiler-literature/discontinued-gas-boiler-literature/240-bf-discontinued-december-1997-literature

Jan 23, 2011 | Heating & Cooling

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Hot banging


it sounds like water hammer, you need to install a water hammer device at the water outlet of the boiler. aviliable from any plumbing stores.

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3 out of 7 rads working with hot water


This is a flow problem within the system and you have ruled out the two major problems already.
asuming the pump has been fitted in the correct way round and the pump isolation valves are open fully. have you tried closing down the radiator valves upstairs and forcing the flow around the downstairs circuit? also is there any zone valves on the circuit not opening.
Is it a conventional type system with a header tank ?

Feb 01, 2009 | Heating & Cooling

1 Answer

Ariston micro genus combi boiler central heating works okay but domestic hotwater fails to rise but burners seem to be lit and the boiler doesnt appear to cycle dhw temp gets to about 30 degrees instead of...


having found a circuit diagram, realised that the divertor valve was electrically operated.i unplugged this then unclipped the motor from the valve body,the diverter valve is spring loaded and once i'd removed the motor the spring raised the valve to divert water through the dhw heat exchanger,giving us hot water but no heating, if i refit the motor the problem comes back heating no dhw.ordered new motorised valve assembly £30 next day order .
this was a simple fix without having to drain the system down.

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1 Answer

Vaillant Ecotec combi boiler - radiators working but no hot water flow to taps


David,

The fact that you're getting a little burst of domestic hot water suggests that the boiler is capable of circulating hot primary loop water through the heat exchanger, but doesn't necessarily do so when it needs to.

What seems to be lacking is a recognition that domestic hot water is now being drawn off, and that the boiler needs to fire up and divert the primary flow through the heat exchanger.

A good place to start might be the flow switch (usually in the bottom of the boiler, where the cold water supply comes in) or the electrical connections to it.

A.

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2 Answers

I have a vitodens 100-w combi boiler and tried to turn the heating on just to give it a working as was advised. However, I have no heat coming to my radiators. The boilers seems to be working as my hot...


Here's the deal: If your Vitodens 100 has outdoor temperature sensing capability, either built in or via external aftermarket control such as Tekmar or other, and the temperature outside is above warm weather shut down (WWSD), then the boiler will not operate for space heating, but will operate to make Domestic Hot Water (DHW) only. Generally speaking WWSD is facoty set at 20*C, since this is normal room temperature so the boiler will not need to operate at temperatures above this number as it is warm enough outdoors to heat the house to comfortable levels.
If your Vitodens 100 does not have outdoor temperature sensing capability then you should check to see if your room thermostats are operational and calling for heat since the boiler is only responding to this on-off control based on room temperature. (turn up your room thermostats)
In both cases you need to make sure that your heating system's distribution pump and zone valves are operating correctly.
In any case you should be calling a heating contractor if you suspect that there is a problem with your boiler and/or heating system.
Good luck.

Aug 07, 2008 | Heating & Cooling

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