BGMVSP-23 Actuator positions?

[PegasusPJ]

Hi,

I've just bought a new house and I'm trying to work out what's going on with the CH/HW system.
I know that the previous owner had the programmer rewired and I'm not sure this was done incorrectly or the Actuator is the problem but when I try to get the HW on, the radiators heat up too (and I'm not sure if the HW is actually heating or not as well, it's feeding a cylinder), whilst putting the CH on alone doesn't seem to ever fire up the boiler.

Anyway, I've tried to ascertain if the actuator is switching to the correct positions but the sticker that shows the positions (I know there's 3) is missing on it so I don't actually know which is which.
Tried finding a picture somewhere to no avail.

Can someone either post a picture or at least tell me from top to bottom (though mine is upside down) what are the positions?

thanks

 

[seco services]

Here's a pic of a drayton MA1 same as the BG valve
Sounds like yours is stuck in mid position

you can remove the actuator and see is the valve is moving freely with a pair pliers

 

[PegasusPJ]

Here's a pic of a drayton MA1 same as the BG valve
Sounds like yours is stuck in mid position

you can remove the actuator and see is the valve is moving freely with a pair pliers

Not sure it really is the same because from that picture, the position switch is on the other side of the actuator.
It's not stuck in 1 position it does change, I'm just not sure it does so correctly.

 

[seco services]

give us a pic
cause my bg and drayton valves are both the same levers on same side etc as they both fit the same valve and are interchangable.

 

[PegasusPJ]

give us a pic
cause my bg and drayton valves are both the same levers on same side etc as they both fit the same valve and are interchangable.

it's ok, the drayton picture looked like the writing was the other way round but based on the vents, it is the same.

So from my test, When putting HW alone, it stays wherever it was when all off (so W or H but H if was on M).
goes to M (but boiler never firing up) when putting CH on alone (and thermostat asking for it).

goes to M when putting both on, to H when putting both on but water is already heated up, and to W when both on and CH thermostat lowered. (so basically does what it needs to do when both are switched on).

doesn't make much sense but sounds like the wiring is screwed up though rather than the actuator.

 

[seco services]

When putting WH alone, it stays wherever it was when all off (so WH or CH but CH if was on M).

right

goes to M (but boiler never firing up) when putting CH on alone (and thermostat asking for it).

it won't it needs to activate the micro switch
go all the way across to H

goes to M when putting both on,

thats right

to H when putting both on but water is already heated up, and to W when both on and CH thermostat lowered. (so basically does what it needs to do when both are switched on).

right

doesn't make much sense but sounds like the wiring is screwed up though rather than the actuator.

sounds like the HW OFF at the programmer is not giving out 230v to the
grey wire on the valve.
as CH is only moving to M.

 

[PegasusPJ]

When putting HW alone, it stays wherever it was when all off (so W or H but H if was on M).

right

how is that right? it means that if it was on W then it correctly heats up the HW, but in the other cases it switchs on the heating when in fact I want HW

sounds like the HW OFF at the programmer is not giving out 230v to the
grey wire on the valve.
as CH is only moving to M.

HW ON doesn't seem to do what it should either though, see above.[/quote]

 

[seco services]

When putting HW alone, it stays wherever it was when all off (so W or H but H if was on M).

how is that right? it means that if it was on W then it correctly heats up the HW, but in the other cases it switchs on the heating when in fact I want HW

If you select HW only the pointer willbe on W
when HW satisfied it will stay on W

the CH can also heat up if the rubber ball in the valve is not shutting fully causing rads to heat.

now when HW only selected you need to check the pipework to the cylinder from valve is getting hot or staying cold.
we know the rad side is heating.

 

[PegasusPJ]

When putting HW alone, it stays wherever it was when all off (so W or H but H if was on M).

how is that right? it means that if it was on W then it correctly heats up the HW, but in the other cases it switchs on the heating when in fact I want HW

If you select HW only the pointer willbe on W
when HW satisfied it will stay on W

the CH can also heat up if the rubber ball in the valve is not shutting fully causing rads to heat.

now when HW only selected you need to check the pipework to the cylinder from valve is getting hot or staying cold.
we know the rad side is heating.

that's the problem, when I select HW, it doesn't go to W if it wasn't already there.
that and the CH not going into H position when on it's own.

 

[seco services]

have you a multi meter ?
does it fall to W if you isolate the heating circuits main fused spur ?

 

[PegasusPJ]

have you a multi meter ?
does it fall to W if you isolate the heating circuits main fused spur ?

I do have a multi-meter..
what do you mean by isolating the spur?