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Post by rocketmanbkk on Feb 9, 2019 10:23:31 GMT
So zoned heating. I understand it in principle that some systems are zoned so you can heat up different parts of a property.
How does this work with the controls? What are the best controls to Use?
Also, when piping up do you need to change the set up or is it the same as say a s plan with different zones on a few 2 ports?
Cheers all
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Post by tomplum on Feb 9, 2019 11:11:05 GMT
Hi Rocky yes you're right zone valves allow for heating pats of a building separate, Think of it as circuits, water has to circulate round in order for the heating to work and a zone valve will allow circulation or stop circulation, So each Zone has to be piped as a circuit on its own with a zone valve on either the entry or the exit that won't affect the circulation of other zones, now the wiring is complex but a simple way to think of it, each zone valve needs electric to work and a switch, A room stat can be the switch and that will make the electric to the valve go on, or off, A good topic rocky and interesting hopefully others will add to this and many will gain knowledge,  |
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Post by rocketmanbkk on Feb 9, 2019 11:47:04 GMT
Cheers Tom
So what kind of timer is needed or do you need a timer for each zone?
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Post by dickpuller on Feb 9, 2019 17:11:42 GMT
Most new builds are zoned, so there’s a Bedroom zone(with its own Room Thermostat) & a main house zone(with the Room Thermostat in the Hall or living room). There’s a Part L requirement for zoning on houses above a certain floor area.
Even with Combi boilers there’s two or more zone valves on the system, with programmable Room Thermostats. Like an S Plan, the Valves completely close & kill the system circulation, so an addictional by-pass Valve is fitted on the system.
Unlike a Y Plan, where there’s always an open port on the 3 way mid-position valve, even when there’s no call for HW or CH the HW(B) port is open. So no real requirement for a by-pass valve to dissipate heat, though generally there’s always one radiator fitted with no TRV on most systems.
One interesting point that’s always debated; with smart(ERP) circulation pumps, is there a requirement for any type of by-pass valve, when both the boiler & circulation pump slow down as the system reaches its optimum temperature. Also modern boilers have a better CH ratio, meaning their output can be regulated according to the CH requirement & lastly boilers like the Ideal Logic use the fan to dissipate heat from the Primary heat exchanger.
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Post by battle1066 on Feb 9, 2019 17:17:03 GMT
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Post by rocketmanbkk on Feb 9, 2019 20:12:31 GMT
Yeah, that’s what I didn’t know about, the control of more than 2 2 ports as a ‘normal’ programmer will do hot water & ch 1 valve.
Cheers all
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Post by rocketmanbkk on Feb 9, 2019 20:13:03 GMT
I’d also like to see a wiring diagram for a multi zone set up too
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Post by battle1066 on Feb 9, 2019 20:16:52 GMT
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Post by Deleted on Feb 9, 2019 20:30:45 GMT
I’d also like to see a wiring diagram for a multi zone set up too It's is very simple really Rocky, if you understand a standard S plan with just heating and hot water it's the same lay out but just multiplied. These systems are just a series of switches and that is all they are. Some older systems will have standard programmer for heating (rads) and hot water, if someone added an UFH circuit they take a permanent live to a switch (on/off summer winter) . Switched on in winter that live goes to a stat and that live goes to the two port for the UFH and that live goes to the boiler and pump,,,,,, it is the same series of events over and over again. Hope that helps a little.  |
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Post by cylinderfella on Feb 9, 2019 20:57:52 GMT
I think S plan gives you the most options.
J Ward has good videos about wiring the systems:
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Post by glowbug on Feb 10, 2019 9:17:12 GMT
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Post by rocketmanbkk on Feb 10, 2019 10:44:54 GMT
I’ve seen them I’m getting a pair tomorrow Cheers |
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Post by Deleted on Feb 10, 2019 11:02:29 GMT
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Post by glowbug on Feb 10, 2019 12:00:57 GMT
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Post by Deleted on Feb 10, 2019 15:12:00 GMT
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