H
Hot&Cold
A quick check of the system bypass,it may be fully open when it need not be.The heating system is all brand new so I would like to think it worked.
A quick check of the system bypass,it may be fully open when it need not be.The heating system is all brand new so I would like to think it worked.
Good question, one I asked myself and I stupidly never tested it before removing the TP5000s.Yes, quite so, but with the boiler apparently working and the zone valve open then the rads are expected to be heating up.
The TRVs are an item, really the only one, which could be preventing most rads from heating up.
Merely connecting the Nest will not have made any difference to the system. So was it really working before the Nest was fitted?
. My system has a Honeywell outdoor temperature sensor in it. I did intend to hook it all up using OpenTherm but was advised that won't work with a dual zone system with Nest.The full advantage of the latest Nest is only obtained when it is connected to use the Weather Compensation feature to modulate the boiler flow temperature control with an Open Therm connection.
A mere on/off control is not using it to its full advantage.
Tony
So the outdoor sensor is not connected and the boiler is not set up for open therm switching,next you will tell us something like its got several frost thermostats etc.My system has a Honeywell outdoor temperature sensor in it. I did intend to hook it all up using OpenTherm but was advised that won't work with a dual zone system with Nest.
So the outdoor sensor is not connected and the boiler is not set up for open therm switching,next you will tell us something like its got several frost thermostats etc.
Did yiu try the system bypass ?
So how do you explain a Nest which works when it's not connected wirelessly? Wired communication is the only answerFrom the Nest Installation Manual (my emphasis):
The Heat Link and Nest Thermostat communicate wirelessly, even if they are also connected by cables.
I could be wrong but I was under the impression communication was always wireless. Sane with Honeywell lyricSo how do you explain a Nest which works when it's not connected wirelessly? Wired communication is the only answer
. My system has a Honeywell outdoor temperature sensor in it. I did intend to hook it all up using OpenTherm but was advised that won't work with a dual zone system with Nest.
A more fundamental reason is that you can't have a boiler running at two different flow temperatures at the same time This would happen if, for example, one zone was set to a 20C required temperature and the other zone for a 16C temperature. 20C may require a flow of 75C, 16C a flow of 65C. It all depends on the heat loss from the house.The advised reason that two Nests, one for each zone, would not work on the open therm ( OT ) is that the boiler can only accept one OT connection at a time.
I can't. Nest need to get their act together and make sure the published documentation is correct.So how do you explain a Nest which works when it's not connected wirelessly? Wired communication is the only answer
I can't. Nest need to get their act together and make sure the published documentation is correct.
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