Zoning

[nichos]

Hi,

Recently my gas-fired central heating system was updated to two zones each operated by its own programmable Honeywell thermostat , 1) main house & 2) annex.

Both work except the one heats up the rads on both sides, the other heats up only his own side.

Can you please explain what would cause this malfunction?. ......thanx .....nick

 

[Riley]

I would hazard a guess at a wiring issue. Either way if it's not doing what you want it to do get the original installer back.

 

[village idiot]

Hello nick, as above. Your installer should be the one trying to resolve the issue, not you. If the system worked ''well'' before the zoning update, then he must have missed something. Get him back to resolve it

 

[nichos]

Thanx both,

He did a few very good jobs for me the last 3-4 years including the install of my present boiler.

Even so he said not to worry if both sides heats on demand.

The piping has been checked & is correctly plumbed.

I thought too that perhaps one of the 2 programmable Honeywell thermostats is inadvertently wired to both Zone Motorized valves. ..........nick

 

[Riley]

I don't understand?? It's not meant to heat both

 

[SimonG]

Wired incorrectly if you are lucky. Piping error if you are not. Whole point of zoning is to give independent control. Get him back.

 

[nichos]

NO, just diligent.

 

[nichos]

Perhaps this is how it is wired & opens both zone valves, by connecting #7 of new stat to #5 of the other stat.

 

[SimonG]

Perhaps its a diy job?

 

[nichos]

Thanx,

as mentioned above the plumber did a few very good jobs for me the last 3-4 years including the install of my present boiler. I found him very reliable, fair & efficient, no doubt he will call his electrician back to check it. He always used him before.

After all we are all humans & make mistakes.

I just wanted to investigate myself to find out & keep my mind working at this old age.

 

[Worcester]

If it's incorrectly plumbed it could also be reverse flowing round some of the rads or one of the zone valves could be stuck....

 

[Riley]

I think the answer is get installer back. We are all human. Mistakes happen.

 

[buckley plumb]

If it's only just started doing it one zone valve could be passing. So when the zone which I'd ok is on the heat passes through the other which I's passing or stuck open