CH/HW Programmer

[sakm]

Hi all got a question i need an answer for

just moved in to a house that has a hot water tank heated by a boiler with central heating run off it too

there is no programmer for the hot water side of things and would like to fit one as theres no point heating water whilst my and the missus are at work all day

there is a program and a room stat for the central heating but my plan is to replace it with a room stat with a 2ch program to control the CW and HW

the question is how do i wire it in

i have done a diagram of whats in the system and what whires go where

so any help would be great

Untitled

• sakm
• 7 Aug 2011
• 1

thanks stu

 

[Andygasman2010]

Hi

Chances are that to do what you want you'd need to update the plumbing as well as the wiring.

That pic you posted hasn't worked so first things first, take some more of the timer, boiler and any pipework in the airing cupboard and post back.

Andy

 

[sakm]

hi there so you mean you cant see the pic? i can see it fine here

will try again through photobucket

i will get photos when i get chance

if the pic works it will probably explain a lot more to you maybe

thanks stu

 

[picasso]

this should do what you want.

View media item 36338

 

[ChrisOxford]

hi there so you mean you cant see the pic? i can see it fine here

So could I earlier, but now it's gone

 

[sakm]

this should do what you want.

excellent thanks for that

 

[sakm]

this should do what you want.

View media item 36338

well i got my programmer finally

and i got one with a built in room stat

now i am stuck

going by your wiring you have 5 terminals my programmer has 6

and also going by your pic there is two wires one on 4 and one on 7 that seem to go nowhere are they to the room stat?

so still actually stuck with how to wire this prgrammer/stat in

here is a pic of the wiring diagram on the back

any help greatly appreciated

 

[DP]

If your heating is controlled by a programmable roomstat already, then you only need a simple timer to heat water

 

[sakm]

If your heating is controlled by a programmable roomstat already, then you only need a simple timer to heat water

too late i have already got a new 2 channel programmer

so i may aswell wire this in

 

[sakm]

or could i just use the one channel for the HW and that will let me put this programmer near the boiler

 

[picasso]

Ignore the wires on 4 and 7, I just forgot to erase them, you only use hw on, hw off and ch on terminals on the programmer, the wiring diagram on the back of the programmer tells you what wires to put where.

1=HW OFF

2= not used

3= HW ON

4= CH ON

 

[sakm]

excellent

and obviously just the L&N to conect too

 

[picasso]

excellent

and obviously just the L&N to conect too

of course

 

[DP]

OP, better plan would be to use the HW set on the programmer to heat the water and wall mounted progstat to control the heating.

Progstat will give you time and temperature programming. Using the CH contact set on the programmer then limits your progstat as if will only be able to function if your new programmer is active for heat call.

 

[picasso]

DP the op has bought a 2 channel programmable room stat as he wants to control the heating and hot water from the same place, there wasnt any programmer for the hot water before so I cant see any problem using the new stat to control both.