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I have a 70,000 sf university building with a water source heat pump loop. The loop is running as expected, going from 60-90F on the supply side and unmet hours are at a reasonable level. After some checking, I was satisfied with the operation and moved to the SHW loop. I added a loop with the AEDG Secondary School script and got a fatal error telling me that my Heat Pump Loop temperature is out of range. It seems unable to calculate adequate flow across the heat pumps in heating mode and ends up with a -577 C loop temperature. Deleting the SHW loop fixes the problem. I get the same result when I create a SHW loop by hand.

Why would the SHW systems impact the heat pump loop operation? Any ideas for me?C:\fakepath\Heat Pump Loop Temp.JPG

I have a 70,000 sf university building with a water source heat pump loop. The loop is running as expected, going from 60-90F 60-90°F on the supply side and unmet hours are at a reasonable level. After some checking, I was satisfied with the operation and moved to the SHW loop. I added a loop with the AEDG Secondary School script and got a fatal error telling me that my Heat Pump Loop temperature is out of range. It seems unable to calculate adequate flow across the heat pumps in heating mode and ends up with a -577 C -577°C loop temperature. Deleting the SHW loop fixes the problem. I get the same result when I create a SHW loop by hand.

Why would the SHW systems impact the heat pump loop operation? Any ideas for me?

C:\fakepath\Heat Pump Loop Temp.JPG

I have a 70,000 sf university building with a water source heat pump loop. The loop is running as expected, going from 60-90°F on the supply side and unmet hours are at a reasonable level. After some checking, I was satisfied with the operation and moved to the SHW loop. I added a loop with the AEDG Secondary School script and got a fatal error telling me that my Heat Pump Loop temperature is out of range. It seems unable to calculate adequate flow across the heat pumps in heating mode and ends up with a -577°C loop temperature. Deleting the SHW loop fixes the problem. I get the same result when I create a SHW loop by hand.

Why would the SHW systems impact the heat pump loop operation? Any ideas for me?

I have a 70,000 sf university building with a water source heat pump loop. The loop is running as expected, going from 60-90°F on the supply side and unmet hours are at a reasonable level. After some checking, I was satisfied with the operation and moved to the SHW loop. I added a loop with the AEDG Secondary School script and got a fatal error telling me that my Heat Pump Loop temperature is out of range. It seems unable to calculate adequate flow across the heat pumps in heating mode and ends up with a -577°C loop temperature. Deleting the SHW loop fixes the problem. I get the same result when I create a SHW loop by hand.

Why would the SHW systems impact the heat pump loop operation? Any ideas for me?