Hi all
Just installed a gas boiler to replace solid fuel.
Thanks to advice received on this board--gas supply installed-meter
installed--new boiler installed--new gas pipe[internal] installed and
tested--zone valves fitted--complete wiring--new control panel and hot
water thermostat.
System fired up and ran perfectly-------------almost--well chuffed.
My problem is a new radiator was installed-- it is the furthest from
the boiler about 20 feet--it will not warm up.
The TRV works in both directions so I have tried it both ways---no
joy.
I have bled both input and output by slackening the lockshield and TRV
connections to obviate an air lock.
All TRVs were turned off to boost flow to the radiator--no change.
Pump is set at mid range.
The radiator will heat slightly when the bleeder is opened and the TRV
controlled input will get hot.
The whole central heating system is only 3 years old using a "classic"
22mm main ring with 15mm feeds to the rads on the flows from one side
and returns on the other basis.
The system is at normal atmospheric pressure--non-pressurised.
I have run out of ideas please advise.
tam

On 27/02/2008 19:06, wrote:

My problem is a new radiator was installed-- it is the furthest from
the boiler about 20 feet--it will not warm up.

Could it have somehow been plumbed it between flow and flow (or return
and return) rather than between flow and return?

On Wed, 27 Feb 2008 11:06:19 -0800, ancell98 wrote:

Hi all
Just installed a gas boiler to replace solid fuel. Thanks to advice
received on this board--gas supply installed-meter installed--new boiler
installed--new gas pipe[internal] installed and tested--zone valves
fitted--complete wiring--new control panel and hot water thermostat.
System fired up and ran perfectly-------------almost--well chuffed. My
problem is a new radiator was installed-- it is the furthest from the
boiler about 20 feet--it will not warm up. The TRV works in both
directions so I have tried it both ways---no joy.
I have bled both input and output by slackening the lockshield and TRV
connections to obviate an air lock.
All TRVs were turned off to boost flow to the radiator--no change. Pump
is set at mid range.
The radiator will heat slightly when the bleeder is opened and the TRV
controlled input will get hot.
The whole central heating system is only 3 years old using a "classic"
22mm main ring with 15mm feeds to the rads on the flows from one side
and returns on the other basis.
The system is at normal atmospheric pressure--non-pressurised. I have
run out of ideas please advise. tam

There is a pipework problem or a blockage. Why did you choose to go for a
vented primary circuit?




--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html

On 27 Feb, 20:03, Ed Sirett wrote:
On Wed, 27 Feb 2008 11:06:19 -0800, ancell98 wrote:
Hi all
Just installed a gas boiler to replace solid fuel. Thanks to advice
received on this board--gas supply installed-meter installed--new boiler
installed--new gas pipe[internal] installed and tested--zone valves
fitted--complete wiring--new control panel and hot water thermostat.
System fired up and ran perfectly-------------almost--well chuffed. My
problem is a new radiator was installed-- it is the furthest from the
boiler about 20 feet--it will not warm up. The TRV works in both
directions so I have tried it both ways---no joy.
I have bled both input and output by slackening the lockshield and TRV
connections to obviate an air lock.
All TRVs were turned off to boost flow to the radiator--no change. Pump
is set at mid range.
The radiator will heat slightly when the bleeder is opened and the TRV
controlled input will get hot.
The whole central heating system is only 3 years old using a "classic"
22mm main ring with 15mm feeds to the rads on the flows from one side
and returns on the other basis.
The system is at normal atmospheric pressure--non-pressurised. I have
run out of ideas please advise. tam

There is a pipework problem or a blockage. Why did you choose to go for a
vented primary circuit?

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is athttp://www.diyfaq.org.uk
Gas fitting FAQ *http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQhttp://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQhttp://www.makewrite.demon.co.uk/BoilerChoice.html- Hide quoted text -

- Show quoted text -

Could the blockage be in the new radiator.
Could there be an airlock in the return--the flow pipe heats up so
there is flow there?.
The pipework is pretty basic a 22mm ring main up the hallway-- about
12 feet long with the flows off one side and the returns off the
other--the minimum separation is about 6 feet--all the other 4
radiators work ok.
I went for a vented system because the header tank and expansion
pipework was already installed as part of the solid fuel set up.
tam

In an earlier contribution to this discussion,
wrote:

Could there be an airlock in the return--the flow pipe heats up so
there is flow there?.

There could well be. Fully turn off the valve on the flow side (if it's a
TRV, use the decorator's cap) and bleed a couple of litres of water out
through the bleed screw. For good measure, reverse the process - by bleeding
with the flow valve open and the return valve closed.
--
Cheers,
Roger
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