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Adding zone to existig combi heating system
QUESTION:Buying a house that has a combi boiler in the garage.
I will change the house to a programable themostat rather than the current
regular themostat.
We are adding a Convervantory, but I want to connect this to the heating
(not sure if underfloor yet, or U/F and rads) using a zone, so that we can
heat the house and leave the conservatory cold (or on a programmable stat,
seperate to the house)
Whilst at it, I am thinking of doing the same with the garage, so that the
heating can fire to heat the garage if required (i.e only on a "frost
setting" for the garage).
What is the easiest way to acheve this? We are effectivly creating 3 zone,
each with there own stats.
ANSWER: Relative piece of cake.
You need one stat (possibly wireless and/or timed)
one motorized valve
Some wire.
Insert motorized valve into zone plumbing
take switch contacts and wire in parallel with other motorized switch
contacts so *any* motorized valve will call for the boiler.
connect local switched fused spur heating live to thermostat and return
to motor on valve.
Connect up neutrals.
Done.
Unless you have an 'orrid all built=in type combi. There things get more
interesting.
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