time varying heat input rate in Feflow 6.0 ?

I want to simulate a BHE field with cooling (in summer) and heating (in winter) over several years. The heat input rate must be time varying und its sign also changes seasonally.
Is it generally possible in Feflow 6.0 to define time varying heat input rate?
(As I see, under the BHE settings only the flow discharge of refrigerant can be time varying.)

Thanks.

To define a time-varying heat-input rate in FEFLOW 6.0 Classic, the corresponding time series has to be selected in the light-blue box BEFORE clicking on the BHE button. Please note that the 'heat input rate' relates to the amount of energy added per time with relation to the chosen reference temperature (in Heat Transport Initials). So it is not - as often thought - the power extracted or injected via the BHE.

Thank you Peter!