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- 1 Mar 2017
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Hi all,
I am new to the forum and shamelessly trawling the internet at they moment to try and find a solution to my problem... which is below:
[*]The system is a Intergas Eco RF 24 running as a heat only system boiler with a 3rd generation nest and a Joule unvented cylinder
[*]It is an S-Plan set up with two Honeywell zone valves, one for hot water one for heating
[*]Nest is connected to the boiler via the heatlink with the two OpenTherm wires and is mounted on the wall, powered by some other wires the installer re-used - so it is not on the USB plug adapter that comes with it
[*]The heating functions perfectly - when called the boiler fires up, the zone valve opens and the radiators warm up. The flow temp can be adjusted by the nest, everything works as it should. Boiler modulates nicely and the nest holds the house and a steady temp really well
[*]The nest is set to OpenTherm for heating and "on/off" for hot water, and is set as a system boiler
[*]If hot water heating is called for the zone valve opens and the water tank is heated ONLY if the radiator heating is going.
[*]If there is no heating called for , and you just ask for water on its own, the zone valve opens but the boiler does not fire. My understanding is the boiler should fire at it's max flow temp when hot water is demanded until the target temp is reached.
[*]My Nest shows software version 5.6 1-4
Nest sent out a "nest-pro" from Help Link, but he had never seen an opentherm set up before, and couldn't help. They even put in a new nest and heatlink and it made no difference. I have asked nest to get back to me with someone who understands opentherm.
I have spoken with intergas but they have said they don't get involved with Nest.
We did put a switched live in from the HW zone valve, and this did make the system call for demand on hot water only, but it made the boiler come on and off every 90s or so, so we removed it.
Does anyone have any experience with this type of set up that might be able to help? Would tado be a better solution for me?
I am new to the forum and shamelessly trawling the internet at they moment to try and find a solution to my problem... which is below:
[*]The system is a Intergas Eco RF 24 running as a heat only system boiler with a 3rd generation nest and a Joule unvented cylinder
[*]It is an S-Plan set up with two Honeywell zone valves, one for hot water one for heating
[*]Nest is connected to the boiler via the heatlink with the two OpenTherm wires and is mounted on the wall, powered by some other wires the installer re-used - so it is not on the USB plug adapter that comes with it
[*]The heating functions perfectly - when called the boiler fires up, the zone valve opens and the radiators warm up. The flow temp can be adjusted by the nest, everything works as it should. Boiler modulates nicely and the nest holds the house and a steady temp really well
[*]The nest is set to OpenTherm for heating and "on/off" for hot water, and is set as a system boiler
[*]If hot water heating is called for the zone valve opens and the water tank is heated ONLY if the radiator heating is going.
[*]If there is no heating called for , and you just ask for water on its own, the zone valve opens but the boiler does not fire. My understanding is the boiler should fire at it's max flow temp when hot water is demanded until the target temp is reached.
[*]My Nest shows software version 5.6 1-4
Nest sent out a "nest-pro" from Help Link, but he had never seen an opentherm set up before, and couldn't help. They even put in a new nest and heatlink and it made no difference. I have asked nest to get back to me with someone who understands opentherm.
I have spoken with intergas but they have said they don't get involved with Nest.
We did put a switched live in from the HW zone valve, and this did make the system call for demand on hot water only, but it made the boiler come on and off every 90s or so, so we removed it.
Does anyone have any experience with this type of set up that might be able to help? Would tado be a better solution for me?