HVAC Questions? Ask an HVAC Expert for Answers ASAP
This is probably going to be tricky, but do you have a model number?Also, in what way has the controller failed?
If you can manage it, some photos of the controller and the Honeywell junction box would help - you can attach them to this topic.
I can see the photos, thank you. I will look into this and get back to you in the morning.In the meantime, it would be useful to know what other components you have in the system. For example, a circulating pump, any motorised valves, a room thermostat, etc. Anything you can think of just throw the information at me and I'll make sense of it.
I understand. I can't find a connection diagram for the Activair controller, but it's only three wires!What thermostats and sensors do you have?Presumably there's one on the cylinder?Is there also one outside?
Good call on the sensor location.I'm still trying to find information on the controller.Are you feeling adventurous? If you remove the wiring centre cover and take a photo, I should be able to work out what connects to what, and to deduce the meaning of the three conductors.
Hm. That wiring centre is simply joining two cables to two other cables, so not adding anything. I don't yet see how the controller connects to the system. Where do you plug it in?
OK. So if that grey cable is the one connected to the wiring centre, and in turn connected to a 240V supply, then that's simply a power source. If that's the case then the controller must be a wireless device with a transceiver somewhere. Is there some electronic equipment attached to (or part of) the air source heat pump?
Does this look like your ASHP?
And is this a good representation of your system?
Thinking about it, I think the white cable, that the grey cable is connected to, must go to the Trianco ASHP unit. And that the ASHP has its own power supply. That would mean that the three conductors to the Activair controller are proprietary.I'm determined to get to the bottom of this, and hopefully to find another controller that will work, or another solution.
We inch ever closer ;-)Earlier on I emailed Trianco - the company still exists.I shall follow up with a call tomorrow.I've also posted a question on a heating engineer's forum that I'm on.Looking ahead to possible solutions, as far as I can see all the controller (and/or its counterpart) has to do is the following:1. Turn on/off a fan and refrigerant pump;2. Turn on/off a pump a circulating pump for the heating primary circuit.
Since there are other ASHP products, and they all operate on the same principle, I'd expect to be able to adapt the controller from another system to suit yours.
Here's some news that might be good: I have this reply from Trianco..."We don't have the controllers in stock the heat pumps were purchased many years ago from China I will contact the company let me know the size of pump you have I will then ask them for availability and price." So, could you tell me the rating of your ASHP?What I suggest is that I reply to Trianco with that, then if there is a positive answer after that then I can forward you the email so that you can take over the correspondence.
I don't want to get your hopes up, but it's very good that Trianco is prepared to find out cost and availability.I'll await your model / size information. If there's any label on the back of the controller then the information from that would also be useful. I will include your previous photo of the controller when I reply to Trianco.
I think the 3kW will tell Trianco all they need to know, but I'll send the photo of the whole label.
Email sent. I'll let you know as soon as I get a reply.