Y-plan Issues - quick help needed please!

[Greg Taylor]

Hi All,

I've followed the Y-plan with pump overrun and direct live for the boiler but still the CH and HT not working.

I Have;

Worchester Greenstar RI
Honeywell ST9400
Honeywell DT90E
3 Port Motorized Valve

The boiler is on standby, thermostat ok and control panel ok. But when I put CH or HW on, nothing happens.

Any help would be great!

Thanks,

Greg

 

[Leesparkykent]

Hi All,

I've followed the Y-plan with pump overrun and direct live for the boiler but still the CH and HT not working.

I Have;

Worchester Greenstar RI
Honeywell ST9400
Honeywell DT90E
3 Port Motorized Valve

The boiler is on standby, thermostat ok and control panel ok. But when I put CH or HW on, nothing happens.

Any help would be great!

Thanks,

Greg

What is your orange from the valve and sl from cylinder stat connected to?

 

[davesparks]

Does the valve move correctly? Work through the control sequence methodically testing the voltage at each point to establish where the fault is.

 

[Greg Taylor]

Hi Lee,

They are connected to each other with a link from SL on Boiler for over-run.

Cheers

 

[Greg Taylor]

Hi Dave,

Valve seems to be moving fine. Just the pump doesn't/boiler doesn't seem to fire up.

Cheers

 

[Leesparkykent]

Hi Lee,

They are connected to each other with a link from SL on Boiler for over-run.

Cheers

The pump should be connected to pl at the boiler. orange and s/l from cylinder stat should be together and connected to LR on the boiler.

 

[davesparks]

Hi Dave,

Valve seems to be moving fine. Just the pump doesn't/boiler doesn't seem to fire up.

Cheers

And what voltage do you have at the boiler Lr terminal when their should be a demand?

are you a qualified electrician?

 

[Leesparkykent]

This should help it's Worcester specific.

 

[Geordie Spark]

Greg!!

Try answering post #2

You never know your luck - it could be the answer!!

 

[davesparks]

Greg!!

Try answering post #2

You never know your luck - it could be the answer!!

Geordie!!

Try reading post #4

You never know your luck - he might have already answered it!

 

[Geordie Spark]

Geordie!!

Try reading post #4

You never know your luck - he might have already answered it!

My apologies.

My eyes are buggered & waiting for an opration so I'm struggling a bit just now.

 

[Greg Taylor]

This should help it's Worcester specific.

Thanks again Lee.

I will try that now!

 

[davesparks]

My apologies.

My eyes are buggered & waiting for an opration so I'm struggling a bit just now.

I just couldn't resist such an open invite,

 

[Greg Taylor]

This should help it's Worcester specific.

All done Lee,

the pump ran briefly but the boiler didnt kick in. So I reset the boiler and the pump ceased.

Something simple seems to be missing, I've checked all the wiring as well to no avail.

 

[Leesparkykent]

All done Lee,

the pump ran briefly but the boiler didnt kick in. So I reset the boiler and the pump ceased.

Something simple seems to be missing, I've checked all the wiring as well to no avail.

Boiler locking out? Is the blue light solid or flashing?

 

[Doomed]

you do have the gas switched on?

 

[Greg Taylor]

Boiler locking out? Is the blue light solid or flashing?

Solid.... No errors.

im just concentrating on the orange and Cyl wires at the moment! Maybe loose connection.

 

[Greg Taylor]

you do have the gas switched on?

Yeah my gas fire is kicking out some heat as we speak!

 

[Leesparkykent]

Solid.... No errors.

im just concentrating on the orange and Cyl wires at the moment! Maybe loose connection.

turn ch on programmer and turn room thermostat up and check for correct voltage on LR
and do the same for hot water after you have tried the ch or vice versa.

 

[Doomed]

the isolator at the boiler for gas?