Nov 06, 2012 12:06 pm
I have just had a daikin ducted system installed (The models are Daikin indoor FDYQ71LV1 and outdoor RZQ71KLV4A 7.1kW Single Phase).
I am going to try and get a nest thermostat working with it (http://www.nest.com).
I need to find out what each of the wires that connect up to the current (BRC230Z4) Daikin thermostat do.
We have 6 wires:
Blue, Orange, Yellow, Green, Grey, and Purple, plus an extra (braided?) black one which is not used.
I am guessing (B), (O), (Y), (G) for the first four, but no idea for the other two.
Anyone know, or had success doing this?
Re: Daikin AirCon Wiring2
Nov 06, 2012 9:30 pm
Dave, not sure what kind of sensor you have on your unit, is it a Daikin controller or other?
I'm thinking it may be a Daikin sensor in which case it's most likely a communicating sensor and the nest thermostat won't just drop in.
However, Daikin makes several interface cards which are usually installed into the indoor unit and provides terminals that will allow the nest controller to work.
Re: Daikin AirCon Wiring4
Nov 07, 2012 10:15 pm
Ok, so it looks like you have a zoned system, just to make it interesting!
That card is similar to another I've used before, but I'm not sure if Daikin have a card to force heat on one input and force cooling with another.
I have only done low level (wired) systems with remote enable but still using the units set point, even with high level communications we feed the unit a set point and they control compressors etc, having looked into the sensor you want to use a little, I'm not sure it will work the way you want.
You could possibly use the card you listed with some extra relays and resistors, when your controller says heat give the Daikin a enable command and set the resistance on the set point adjust to say 30 and similar with cooling.
But you would have to confirm with Daikin if that card is suitable for use with zones etc, I don't have access to Daikin's dealer information, only Google and its sketchy at best usually
Re: Daikin AirCon Wiring5
Nov 08, 2012 1:11 pm
The current setup has two zones, I'd have to run them as a single zone to get the nest working.
Looking less possible, Daikin won't give out any info to anybody, there's not even a circut diagram for the BRC230Z4.
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