[TRNSYS-users] Type8a: Setback temperature issue

[PAUL COALES]

Hi 

Are there any issues with Type8a, setback function?  The instructions for use seem straight forward but it does not seem to work for me:

1) If INPUT "Set back control function" is fixed at 0, setback behaviour is disabled.  "Control signal for 1st stage heating" is set when  "Room temperature" drops below "1st stage heating temperature".  This behaviour seems correct.

2)If INPUT "Set back control function" is fixed at 1, setback behaviour should be enabled.  However, the "Control signal for 1st stage heating " is never set.  My heating system never turns on and my room temperature continues to fall.

I've set "minimum primary source temperature" to a low value (10 degrees)  "1st stage heating in 2nd stage" is set to 1.  "Heating set back temperature difference" is set to 1 deltaC


Have I missed something?

Paul