S Plan Help

[sg@940]

Unvented S Plan System with 2 heating zones

Danfoss WB12 wiring centre

Danfoss TP9000 programmer with Danfoss TS2 temperature sensor zone 1 C/H and H/W

Danfoss 4 wire 2 port valve C/H zone 1

Danfoss 4 wire 2 port valve H/W

Range Tribune Cylinder with tank thermostat and immersion heater

3 speed pump

Honeywell CM907 programmer zone 2 C/H

Honeywell 5 wire 2 port valve C/H zone 2

Ideal Logic Heat 12 boiler

This is the make up of my heating/hot water system. Following the change of the head/motor on the Zone 1 C/H 2 port valve, I no longer have control of my heating via the TP9000. The programmer lights up and works for H/W but the boiler will not fire. If I over ride this at the 2 port valve the heating works.

I am hoping that the collective wisdom can tell me just what it is I'm missing, its driving me mad LOL

Thanks in advance

 

[ianmcd]

make sure you havent trapped a wire on the insulation when changing the actuator on the zone valve

 

[sg@940]

I don't think I have but, I'm off to the top of the house to DOUBLE check! Thanks

 

[dilalio]

make sure you havent trapped a wire on the insulation when changing the actuator on the zone valve

That's why bootlace ferrules and/or regin 5 pin plugs are useful

 

[sg@940]

Looked and checked all looks good, the new motor is wired via a regin 5 pin

 

[dilalio]

Make sure valve spindle isn't jammed.
Does actuator motor across on demand?

 

[dilalio]

Looked and checked all looks good, the new motor is wired via a regin 5 pin

Don't forget regin plug means wiring needs to be mirrored from one side of plug to the other!

 

[sg@940]

The spindle turns freely by hand and when the motor is moved from 'Auto' to 'Manual' the heating zone fires up.

By 'regin plug needing to be mirrored' I assume orange to orange (terminal 1) grey to grey (terminal 2) brown to brown (terminal 3) neutral to neutral (neutral terminal) is what you mean?

 

[ianmcd]

When there is a demand for the zone valve to open, check between the Blue and the Brown wires for 240 V, it is the Brown wire that opens the valve

 

[dilalio]

The spindle turns freely by hand and when the motor is moved from 'Auto' to 'Manual' the heating zone fires up.

By 'regin plug needing to be mirrored' I assume orange to orange (terminal 1) grey to grey (terminal 2) brown to brown (terminal 3) neutral to neutral (neutral terminal) is what you mean?

Yep, as long as wires marry up its right.
Brown wire powers motor to wind valve to open, whereby the arm also depresses a microswitch, this microswitch connects grey wire (which is permanently live) to orange wire (fire wire) which energises boiler and pump.

 

[sg@940]

No demand = power to brown and grey; demand shows power on brown, grey and orange

 

[ianmcd]

No demand = power to brown and grey; demand shows power on brown, grey and orange

did you really mean no demand ? if no demand there shouldnt be any power to the Brown, there will be power to the grey and Orange though

 

[sg@940]

Yes, No demand - no C/H either zone, no H/W, no pump running, nothing and there is power at the brown and grey wire, nothing on orange or blue

 

[ianmcd]

Yes, No demand - no C/H either zone, no H/W, no pump running, nothing and there is power at the brown and grey wire, nothing on orange or blue

something wrong then, if power at the Brown the valve should be open, but with no demand there shouldnt be voltage at the Brown

 

[sg@940]

Yes, this is what I'm trying to resolve. It appears the instruction from the programmer is not reaching the valve/motor on this zone. How and why is what is giving me a headache! LOL In terms of H/W and 2nd C/H zone it all works and the zone with the issue works when I open the 2 port manually ....... all very odd.