I see a lot of new technology via my fabulous lot in life.
I was on a new store today, big chain, and doing some work and seen the condensers being freeq driven, no big deal but also seen them fan cycled too. I seen in the e2 that there is this choice you have to combine freeq drive with fan cycle.
I think this is stupid. I have commisioned some, and I have worked on a lot and I never seen the reason to do this and since I was on the roof working today on a particular condenser driven like this, it occured to me how stupid this set up is. You got fans running at low percent, not nearly fast enough to be doing any effective work, and yet as the program worked, fans were cycling via the outputs and contactors. I think it's rough on the contactors. Premature deteiroation for needless cycling.
So I thought the commisioning was all horked up. As I found out this is mandated by engineering for this chain.
How stupid. 1 fan running 200 rpm or all, still not moving any air over condenser. None. Yet, the wind blows, the drop leg temp drops a tad, were shutting fans on and off.
Even on the top end, your never gonna get it so tight you have the need for fan cycling. Just ramp up and down.
How come everyone is not as smart as I am?