I am encountering Boiler errors in my sim runs that I cannot make sense of:

HW-DT in Boiler1(HWNatDrft) has Range Checking Violation: Value must be <=70

And here is the offending section in the inp file:

"Boiler1 (HWNatDrft)" = BOILER
TYPE = HW-BOILER
HW-LOOP = "Hot Water Loop"
HW-PUMP = "Boiler1 (HWNatDrft) Pump"
CAPACITY = -4.265
HEAT-INPUT-RATIO = 1.25
..

I cannot reconcile those two messages. Please help!