I have been working on a model for a loop-to-loop heat pump system (to a
lake or well), and have been getting the following error message:

Heat-Exchanger: New HP Chiller 1 has

inconsistent design parameters:

QhxDesign SupFlow SupTi SupTo

-44451328. 3531. 88.1 63.0

DemFlow DemTi DemTo

2973. 63.1 93.0

The chiller design criteria is 31800000 cooling, with evap flow at 64 to 44
with 3169 gpm and condenser flow at 85 to 105 with 3743 gpm. The heat sink
for the condenser loop is intended to run from 75 F to 95 F at design
conditions.

I am assuming that the negative energy value above indicates that the values
refer to the chiller in heating mode. Can anyone suggest the most like
causes for this error?

Regards,

MaryAnne Mason