CH heating time clocks

[i=p/u]

wonder can anyone help, i have a danfoss 2 channel timeclock which was switching itself on, i had a grasslin towerchron QE2 2 channel time clock in boot of car and swapped it over but it just runs heating and hot water even before anything comes up on display screen.... i thought would be straight swap but obv not

any help or questions i should be asking myself would be appreciated....

 

[i=p/u]

isit anything todo with the valves change over switches

 

[Deleted member 9648]

There will be a maximum of three switched outputs...HW on.HTG on and HW off,you cant go far wrong,just get your voltage tester out and see whats what.

 

[i=p/u]

only two switched outputs DWH ON which was in terminal 3 + HEATING ON WHICH WAS TERMINAL 4,

 

[i=p/u]

Im thinking i need to alter wiring in wiring box to suit this timeclock

 

[Hawk81]

http://www.tfc-group.co.uk/assets/graphics/static/QE1-QE2_GB instructions.pdf should tell you all you need to know

 

[i=p/u]

Forbidden link....

 

[i=p/u]

Would a dodgy valve cause this too start itself???

 

[i=p/u]

I think its not compatable for the wiring

 

[i=p/u]

What about frost stat confusing owner of house

 

[Deleted member 9648]

Disconnect the two switched outputs from the clock and see if the valves close and everything shuts down,if so it must be the programmer or the way you have connected it.....or yes,you had a sticky valve all along.

 

[123]

Most likely a dodgey or two dodgey two port valves

 

[Aindowsimon]

Check valve's incase ones in manual

 

[i=p/u]

Think the key thing here is, it comes on itself, which leads me to the programmer , dont ask why but thats what i think

dinner time

 

[Richard Burns]

Try looking at this wiring comparison guide to see how the two types match up on wiring.
(scroll down to the later pages)
View attachment Replacement_guide_Wiring.pdf

 

[i=p/u]

danfoss 715 replacement is centaurplus c27

 

[davesparks]

How did you confirm that the previous programmer was faulty before you replaced it? Did you test the system or just take a wild guess at what the fault was?

 

[davesparks]

Check valve's incase ones in manual

How would that cause this problem? A valve manually latched open will not fire the boiler and it will return to automatic operation the next time the motor is energised.

 

[i=p/u]

bumped into heating guy at work today, and he believes would be the valves before timeclock an told me you probably need to be there when hot water comes on by itself and said the micro switch could be sticking and if i hit it a bang would probably turn off again...

as for the time clock i tried to replace, he said if i got manual of the original timeclock it woulkd have direct replacements on back page, but he doesnt believe it would be timeclock...

 

[telectrix]

bumped into heating guy at work today, and he believes would be the valves before timeclock an told me you probably need to be there when hot water comes on by itself and said the micro switch could be sticking and if i hit it a bang would probably turn off again...

as for the time clock i tried to replace, he said if i got manual of the original timeclock it woulkd have direct replacements on back page, but he doesnt believe it would be timeclock...

you just need a plumber then.