Radiator not heating up after HW Cylinder removal

dexter2809 · Mar 12, 2020

Looking for a bit of help , short story new combi boiler fitted, old hot water storage cylinder removed but I asked engineer to leave me tails for a radiator I wanted to fit in the cupboard space , I have fitted the rad but it does not heat up. ( I took it as said the 2 tails which were capped off were my tails

So from image all pipes are hot , the 2 tails is where the TRV & the lockshield are connected to , there is a "loop bar" also there which is hot , question is whats going on, can anyone help, both tail elbows hot pipe LHS is hot to the TRV, right elbow is hot to the elbow but pipe to lockshield cold......

Appreciate anyone's input
Thanks in Advance

Mrkayy · Mar 12, 2020

Hi.

What is a loop bar? Have had a similar situation which you have probably already checked..bt just a suggestion.sometimes lockshields come almost closed and have a cap with a screw which needs to be taken off to open. Ie the top may turn but not adjust the actual valve.

Failing that perhaps the system needs to be rebalanced as could be taking easy route through bigger pipes etc. Simply turn off/down hottest radiators and see if the new one gets hot.

dexter2809 · Mar 12, 2020

Mrkayy said:
Hi.

What is a loop bar? Have had a similar situation which you have probably already checked..bt just a suggestion.sometimes lockshields come almost closed and have a cap with a screw which needs to be taken off to open. Ie the top may turn but not adjust the actual valve.

Failing that perhaps the system needs to be rebalanced as could be taking easy route through bigger pipes etc. Simply turn off/down hottest radiators and see if the new one gets hot.

Thanks for the reply ,

The " loop bar" is a 22m copper pipe which literally comes up from the floor spans across the floor surface and goes back under the surface of the floor so it resembles a very shallow C or very low goalposts is the best way I can describe it.

Lock shield & TRV are all fully opened, just weird , my only thought is the way the engineer left it , it was not obvious which pipe to use so both ends of the radiator may be connected to the flow, an dI need to t in to the copper with a 22m - 155 reducing T and hope htat solves it.....

Gasmk1 · Mar 12, 2020

image not showing for me i think that either first answer may be correct of the two tails are not on the old flow and return for the coil so it wont make a circuit

dexter2809 · Mar 12, 2020

dexter2809 said:
Looking for a bit of help , short story new combi boiler fitted, old hot water storage cylinder removed but I asked engineer to leave me tails for a radiator I wanted to fit in the cupboard space , I have fitted the rad but it does not heat up. ( I took it as said the 2 tails which were capped off were my tails

So from image all pipes are hot , the 2 tails is where the TRV & the lockshield are connected to , there is a "loop bar" also there which is hot , question is whats going on, can anyone help, both tail elbows hot pipe LHS is hot to the TRV, right elbow is hot to the elbow but pipe to lockshield cold....

Appreciate anyone's input
Thanks in Advance

Gasmk1 said:
image not showing for me i think that either first answer may be correct of the two tails are not on the old flow and return for the coil so it wont make a circuit

Thanks Image attached, thought I had it attached earlier but made a mess of it
Cheers & thanks for the input

centralheatking · Mar 12, 2020

dexter2809 said:
Looking for a bit of help , short story new combi boiler fitted, old hot water storage cylinder removed but I asked engineer to leave me tails for a radiator I wanted to fit in the cupboard space , I have fitted the rad but it does not heat up. ( I took it as said the 2 tails which were capped off were my tails

So from image all pipes are hot , the 2 tails is where the TRV & the lockshield are connected to , there is a "loop bar" also there which is hot , question is whats going on, can anyone help, both tail elbows hot pipe LHS is hot to the TRV, right elbow is hot to the elbow but pipe to lockshield cold....

Appreciate anyone's input
Thanks in Advance

Quite often on older conventional heating systems there were two alternatives
1. Bypass radiator often in the bathroom as that needs heat even in summer to dry towels
2. Even older it was common practice to route the hot water through a bathroom radiator before it’s final destination at a tap somewhere
It worth bearing in mind Centralheatking

Welcome to PlumbersTalk.net

American Visitor?

Radiator not heating up after HW Cylinder removal

dexter2809

Attachments

Mrkayy

dexter2809

Gasmk1

dexter2809

Attachments

centralheatking

Plumbers Arms member

Similar plumbing topics