programing Temp/humidity sensor PL-0279

[ashlight]

Hi, need some help to pass this could nights..

I have a Temp/humidity sensor PL-0279 wich activate a soket with a fan, i'm trying (I know it can be than but..) to take the humidity out if it pass 60% during the day how ever @ the night time I would like the temp to limt the fan so it wount drop! I did lots of testing with timers and program's I got near but didnt quit get it to work good - appriciate the help.

[Gunther]

There are four steps you have to do:

• Set the humidiy regulation as you need it
• Set the air temp regulation as you need it (also with night drop)
• Set a programmable logic with the two regulations you´ve coded and fuction "AND "
• Assign the socket of the fan to that logic

[ashlight]

Thanks Gunther,

What do you mean set air temp with night drop?
Why should programmable logic with humidity decrease AND air temp chiler function different day and night?
Thanks again

[Gunther]

What do you mean set air temp with night drop?

That´s what you have asked for -> at night the fan should be switched off if the temp is too low
See also "Nocturnal change" in the manual

Why should programmable logic with humidity decrease AND air temp chiler function different day and night?

That´s not what I wrote. The nocturnal change of air temp does the trick

[ashlight]

Thanks Gunther,

I think I got it, I will give it a go. ..

[ashlight]

Dear Gunther,
So air temp set with nocturnal change set to night at -0.5C
Programmable logic set humidity decrease And air temp chiler- nothing happens ?!

[ashlight]

Just to be clear: temp go higher than…and so is humidity but it won't open

[Gunther]

So air temp set with nocturnal change set to night at -0.5C

0.5°C? Your fan may change that temp in a second (depenting on air volume and fan size) - this is a much to low spread.

I would set the humidity to let´s say 60% and and the time for nocturnal change from 9:00pm to 9:00am with a value of 30%
If you do so, the fan will start, if the value is higher than 60% on day and in the night if it´s over 90% as a fallback to prevent condensation

This may be what you want. If yes, assign the socket to humididy and downward regulation - and that ´s it.
Anyway, an temp optimation is possible

Set the air temp to the min temp for the night, let´s say to 25°C and and the time for nocturnal change from 9:00 am to 9:00pm [Remark: You have to set the day not the night here. I know that looks strange, but I will explain it soon]
Now I set the spread nocturnal change to the min. acceptable daily temp, letz say -10°C
The temp regulation will stop cooling if 30°C is reached in the night (normal mode), but during the programmed time it will allow to go lower (nocturnal mode).

Now set a pogrammable logic to humidity decrease AND air temp chiller and you got it.

Fan will start on day above 20° and 60% and in the nicht above 30°C and 90%

[ashlight]

Hi, again thanks.

Few small remarks:
1. The nocturnal change in humidity cannot be saved (5.12)
2. 90% humidity is rain from the roof top
3. Yes setting day time to achieve night change is strange.

But I'm doing what you're saying right now

[ashlight]

So I did, exactly as you said - but it only sees the humidity and pay no attention to the air temp?