Re: [TRNSYS-users] control problem for type 927

[Emre Arpaci <emrearpaci10@gmail.com>]

In short, what ı want is this the heat pump will work if the greenhouse temperature is below 8 degrees, If the greenhouse temperature is above 8 degrees, the fan coil and the heat pump will stop.

Emre Arpaci <emrearpaci10@gmail.com>, 17 Ağu 2019 Cmt, 16:44 tarihinde şunu yazdı:

Hi trnsys users

I have a new problem. :) 

I m heating a greenhouse with a heat pump.I m currently trying to control this heat pump. I want to work  this heat pump when temperature is below 8 degree and stop that heat pump when temperature rises 8 degree in the greenhouse. To make it I used five stage room thermostat. I connected grenhouse temp to monitoring temperature of thermostat and entered 8 degree value for 1 stage heating setpoint. But I got this error messagas in the figure.

I connected control signal for 1 st stage heating in the thermostat to fan coil and heat pump as you see in the picture.

Now how can ı control to start and stop of this heat pump as I want. Because I don't want this heat pump to work for 24 hours. I tried the differentual equation control but I got the same error messages.

I added also my deck file.

Please help me.

Thanks

Regards