Drayton trv4

[Mikeyward]

I've fitted drayton 15mm trv4 with reducer onto 8mm microbore. I've put the valve heads on setting 4 and the radiators heat up then switch off and the rads go cold and room goes cold but doesn't seem to switch back on but if I remove the valve head then the radiators get very hot

 

[cross thread]

Is the thermostat in a position that gets air flow ? Or is it blocked off by curtains / furniture

 

[Mikeyward]

Yeah it's getting air flow the radiators are under the window but we have got blinds

 

[CountryFan]

Can you post a photo of the valve and the surrounding area?

 

[Mikeyward]

This is the radiators

 

[CountryFan]

Could be faulty trvs but maybe speak to Drayton technical? I don’t see an issue with the installation

 

[Johntheo5]

This is the radiators

Have you turned the actuator to max setting before attaching it to the valve and tightening the knurled nut?

 

[Mikeyward]

Hi yes I've turned them to the max setting on the actuator valve body

Have you turned the actuator to max setting before attaching it to the valve and tightening the knurled nut?

 

[Johntheo5]

Hi yes I've turned them to the max setting on the actuator valve body

BEFORE attaching them to the valve body and tightening up the nut??

Have a read of this,

https://community.screwfix.com/threads/daryton-trv-4-problem.193351/

 

[Mikeyward]

BEFORE attaching them to the valve body and tightening up the nut??

Have a read of this,

https://community.screwfix.com/threads/daryton-trv-4-problem.193351/

I've only hand tighten the valve nut up

 

[Mikeyward]

If I take the valve head off the rads get very hot

 

[Johntheo5]

Hand tighten is correct and fine, these TRVs seem to have a lockshield type adjustment incorporated which requires a special tool to set up, according to the attachment but still shouldn't IMO, cause this on/off problem. Remove the actuator and look down very closely on the plastic top of the valve, you might see a slot with a number opposite it. Are all the TRVs behaving like this or have only got one Drayton TRV4?

 

[Mikeyward]

Hand tighten is correct and fine, these TRVs seem to have a lockshield type adjustment incorporated which requires a special tool to set up, according to the attachment but still shouldn't IMO, cause this on/off problem. Remove the actuator and look down very closely on the plastic top of the valve, you might see a slot with a number opposite it. Are all the TRVs behaving like this or have only got one Drayton TRV4?

Hi no its just 3 rads upstairs the downstairs rads I have got all set on max setting and try are working on max setting yes I've used the drayton tool

 

[Johntheo5]

Any idea of what the setting(s) are now, is this internal "lockshield" fully opened and if so what number is it showing?. Normal TRV's will control pretty well as long as the boiler is firing continuously, I've used EPH for years, nothing special but they do give excellent control, maximum setting on these is 5 and a setting of between 2.0 and 3.0 gives me room temps of 16C to 22C, all are installed horizontally, on the rad(s) return as I reckon this gives a more representative room temperature but this has nothing to do with your problem which seems to crop up fairly regularly.

 

[Mikeyward]

Any idea of what the setting(s) are now, is this internal "lockshield" fully opened and if so what number is it showing?. Normal TRV's will control pretty well as long as the boiler is firing continuously, I've used EPH for years, nothing special but they do give excellent control, maximum setting on these is 5 and a setting of between 2.0 and 3.0 gives me room temps of 16C to 22C, all are installed horizontally, on the rad(s) return as I reckon this gives a more representative room temperature but this has nothing to do with your problem which seems to crop up fairly regularly.

Hi I've tried all the setting and now I've got them on setting 6 and balanced them using the lockshield valve i might order a new trv head and see if its the heads that are faulty the valves are install vertical