Separate CH/DHW Programmer with third "OR'ed" output for boiler
 

Can anyone suggest a programmer/controller with separate CH & DHW
outputs with a third output being an "OR"of the other two.

I am seeking to replace an old Sunvic controller which has/had such an
arrangement to drive the boiler on the "OR" output and either the CH or
DHW pumps as called for.

I appreciate that all this can be done with Y plans etc but that's a
"wet" solution. What I'd like is a "Dry" solution involving a straight
replacment of the controller/programmer. For reasons much too boring
to go into, I'd rather just replace the controller since the pumps and
boiler are A1 and access to the plumbing is limited.

(I'm not being idle, I've spent hours trying to get this info from
on-line files where each time I have to download a pdf file and kick
off Adobe to look at the schematic of the back plate. There must be
expertise in this group that can say, "Try xxxxx")

I think what I want is a set of three "voltage-free" ouputs.

Thanks
Naffer

Separate CH/DHW Programmer with third "OR'ed" output for boiler
 

On 27 Apr 2006 11:56:41 -0700,it is alleged that "naffer"
spake thusly in uk.d-i-y:

Can anyone suggest a programmer/controller with separate CH & DHW
outputs with a third output being an "OR"of the other two.

I am seeking to replace an old Sunvic controller which has/had such an
arrangement to drive the boiler on the "OR" output and either the CH or
DHW pumps as called for.

I appreciate that all this can be done with Y plans etc but that's a
"wet" solution. What I'd like is a "Dry" solution involving a straight
replacment of the controller/programmer. For reasons much too boring
to go into, I'd rather just replace the controller since the pumps and
boiler are A1 and access to the plumbing is limited.

(I'm not being idle, I've spent hours trying to get this info from
on-line files where each time I have to download a pdf file and kick
off Adobe to look at the schematic of the back plate. There must be
expertise in this group that can say, "Try xxxxx")

I think what I want is a set of three "voltage-free" ouputs.

Thanks
Naffer

One solution that immediately springs to mind is a pair of 230v coil
relays with the NO contacts in parallel (If no equivalent programmer
is forthcoming).

Items from http://tinyurl.com/keud5 (tinyurl for
http://www.tlc-direct.co.uk/Main_Ind...ays/index.html
) would seem suitable


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