Well, two steps forward, one step back...
So last week our new heating and A/C units were being installed. The way it was supposed to work was that the installers come out and decommission the old units and position/connect up the new units. At a point during the day a sparky would drop by to hook up the 3 phase power to the A/C and run the wiring to the new smart thermostat.
Since this was a smart thermostat I was supplying I sent the wiring requirements to the company doing the install two weeks prior to the install. All sweet.
So the dudes rock up, pull out the dead units and install the new ones no problem. Half way through the morning they spring the bad news - the sparky has called in sick. :(
The good news is that since the heating unit is just a plug into an existing 220V powerpoint it doesn't require a sparky so at least we get heating. The installers take my thermostat, install the mount and start doing the 24V wiring. I'm looking over their shoulder of course and start pointing out where they are doing it wrong. 'But that's how we always do it', I get told.
I explain that the thermostat I've provided is two stage capable and they had wired it up as a single stage unit. So it gets rewired and plugged in. Nothing.
At this point I'm not sure if it's their dodgy wiring or if my thermostat is DOA. They suggest hooking up a 'dumb' thermostat to see if it works, and it does. However, it's not apples for apples - the dumb thermostat has batteries and will function even if it can't draw power via the Common wire from the heater. The smart thermostat requires power via the Common wire.
Fortunately even though I was supplying the thermostat, as a part of the quote I got them to throw in a low end programmable one as a backup. It's this one that we have been using for the last few days to avoid freezing.
Anyway, this morning I finally got around to checking the wiring. I powered off the heater, removed the temporary thermostat and hooked up the smart thermostat. Whacked the power back on and bugger me, the thermostat fired up as it should.
So now I've verified my thermostat is fine. When the sparky comes on Saturday I'll sit him down with a cup of coffee and the wiring diagram before he touches anything...
The moral of the story?
Home Automation is not something that any of the heating/cooling companies I spoke to know much about and that they are determined to keep on doing what they have been doing for years. I'm more than happy with the quality of the install in general, but they are very much set in the way they do things.
I'll report back once the install is complete.
Edited by Mac Dude, 16 August 2017 - 12:17 PM.
Karl Kruszelnicki - No, I’m fully prepared to believe in the “Church of God the Utterly Indifferent who sets the universe going and says you’re on your own kids.