I have a greenhouse zone that is controlled with an ZoneHVAC:EvaporativeCoolerUnit
and ZoneHVAC:Baseboard:Convective:Water
that coupled with hot water plant loop. the thermostat adjust the zone temperature between 16-18 deg C.
Sometimes baseboard sys and HW plant loop are on when There is cooling load , but EvaporativeCoolerUnit is always off when there is no cooling load.