Not speaking for burnin but i believe all ordered boards already were built. He now ships the miners as soon as they reach him from the assembler, after the assembler tested the unit.

Boards are running stable with 413 now, no clicking. Boards were set with

--avalon-options 115200:2:10:28:450 --avalon-auto --queue 4 --bitburner-voltage 1285

And are running fine with the auto option now.

Have you thought of the temperature that the boards are idled ?

I have this:
--queue 4 --avalon-options 115200:16:10:d:400 --bitburner-voltage 1250 --avalon-temp 50 --avalon-cutoff 65 --avalon-fan 100

I explicitly set the cut-off temp to 65. The default is 60, so that's probably why your boards are idling.

You'll have to delve into the specs of the Avalon chip, but this might help:
On https://en.bitcoin.it/wiki/Avalon#How_to_Compile_Your_Own_Firmware_for_Avalon :

New  Batch3 Machine: Target Temperature to 70℃ and Overheat Cut Off Temperature to 90℃

Depending on the design of Burnin (on other words how accurate is the value of the temp sensor), you can go up in temp...

What are the bitburner XX "standard" Avalon and voltage settings for cgminer without overclocking?

I'm waiting for a refund too. Willing to put it towards a BitFury board if it can make ROI.

sorry for the delay. I had problems with my PC.
At the moment it´s cold outside ( 4°C) and I set the voltage to 1300 mV.



I´m using an old cooler from a car. It needs 150 W for the ventilation.




And this is the water pump. max 2200 l/h



And this are my 48 bitburnerXX:








All the things are working very good with no problems.
There is only one problem: It will take about 4 weeks. Then the energy costs will be higher than the earnings.

There is something wrong with the math.

I am guessing that 5GH/s units are the 20 chips modules. If I convert 105 EURO's to CAD it's about $150 CAD. To get over 100GH/s I will need to spend $3000 CAD. Yet our friend YiFU sells the 4 module Avalon's for 12BTC which is $2400 CAD which I can easily get 100GH/s from.

WTF?

Lets do some math, maybe im just going nuts here.

150 watts for the ventilator

XX Watts for the pump, you didnt write about that.

around 110 watts per bitburner board, coming up to around 5300 watts
This means, we are talking 5500 watts and a hashrate of 420gh/s.

"calculating"

My calc is that you need around 3900 kw/h per month. Basically, this equipment burns on the level of a normal family per month.

How expensive is that? Well, in my country, I pay around  25 eurocents per kw/h. Coming up to 975€. That us quite expensive already.
Your mining profits right now, per month, are around 3200 USD, around 2400€. Don't want to be annoying, but the difficulty would have to double again, to get you trouble. Not that it cannot happen, and it WILL likely happen, but how far do you think this is gonna go? At least you won't loose profits in the next four weeks I guess. You could even take doubling the diff right now to be profitable...