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Hi all. I used the new beta version of DesignBuilder to model the ASHP detailed HVAC system.

The ASHP will be used for heating and Hot water. I upload the HVAC system as shown below.

error I got: Last severe error=Plant temperatures are getting far too cold, check controls and relative loads and capacities

*** * Warning * Plant loop falling below lower temperature limit, PlantLoop="AUX HW LOOP"

*** * ~~~ * This error occurred 5 total times;

*** * ~~~ * during Warmup 5 times;

*** * ~~~ * during Sizing 0 times.

*** * ~~~ * Min=-136.598068

I've checked the minimum loop temperature is set to 0 and the maximum loop temperature is set to 80. When I tried to increase the minimum temperature from 0 to 20, the error message changed: Min=-56.215634 and the error occurred times increased to 146.

I have no idea where this -136 degree come from.

Thanks for your help. Thanks again.

Hi all. I used the new beta version of DesignBuilder to model the ASHP detailed HVAC system.

The ASHP will be used for heating and Hot water. I upload the HVAC system as shown below.

error I got: Last severe error=Plant temperatures are getting far too cold, check controls and relative loads and capacities

*** * Warning * Plant loop falling below lower temperature limit, PlantLoop="AUX HW LOOP"

*** * ~~~ * This error occurred 5 total times;

*** * ~~~ * during Warmup 5 times;

*** * ~~~ * during Sizing 0 times.

*** * ~~~ * Min=-136.598068

I've checked the minimum loop temperature is set to 0 and the maximum loop temperature is set to 80. When I tried to increase the minimum temperature from 0 to 20, the error message changed: Min=-56.215634 and the error occurred times increased to 146.

I have no idea where this -136 degree come from.

Thanks for your help. Thanks again.

Hi all. I used the new beta version of DesignBuilder to model the ASHP detailed HVAC system.

The ASHP will be used for heating and Hot water. I upload the HVAC system as shown below.

error I got: Last severe error=Plant temperatures are getting far too cold, check controls and relative loads and capacities

*** * Warning * Plant loop falling below lower temperature limit, PlantLoop="AUX HW LOOP"

*** * ~~~ * This error occurred 5 total times;

*** * ~~~ * during Warmup 5 times;

*** * ~~~ * during Sizing 0 times.

*** * ~~~ * Min=-136.598068

I've checked the minimum loop temperature is set to 0 and the maximum loop temperature is set to 80. When I tried to increase the minimum temperature from 0 to 20, the error message changed: Min=-56.215634 and the error occurred times increased to 146.

I have no idea where this -136 degree come from.

Thanks for your help. Thanks again.

Hi all. I used the new beta version of DesignBuilder to model the ASHP detailed HVAC system.

The ASHP will be used for heating and Hot water. I upload the HVAC system as shown below.

error I got: Last severe error=Plant temperatures are getting far too cold, check controls and relative loads and capacities

*** * Warning * Plant loop falling below lower temperature limit, PlantLoop="AUX HW LOOP"

*** * ~~~ * This error occurred 5 total times;

*** * ~~~ * during Warmup 5 times;

*** * ~~~ * during Sizing 0 times.

*** * ~~~ * Min=-136.598068

** PlantLoop Outlet Node (SupplySide) "AUX HW LOOP SUPPLY SIDE OUTLET" has temperature=-111.1 {C}

I've checked the minimum loop temperature is set to 0 and the maximum loop temperature is set to 80. When I tried to increase the minimum temperature from 0 to 20, the error message changed: Min=-56.215634 and the error occurred times increased to 146.

I have no idea where this -136 degree come from.

Thanks for your help. Thanks again.

Hi all. I used the new beta version of DesignBuilder to model the ASHP detailed HVAC system.

The ASHP will be used for heating and Hot water. I upload the HVAC system as shown below.

error I got: Last severe error=Plant temperatures are getting far too cold, check controls and relative loads and capacities

*** * Warning * Plant loop falling below lower temperature limit, PlantLoop="AUX HW LOOP"

*** * ~~~ * This error occurred 5 total times;

*** * ~~~ * during Warmup 5 times;

*** * ~~~ * during Sizing 0 times.

*** * ~~~ * Min=-136.598068

** PlantLoop * PlantLoop Outlet Node (SupplySide) "AUX HW LOOP SUPPLY SIDE OUTLET" has temperature=-111.1 {C}*

I think this is the place where the error occurred, however, how can I increase the supply side outlet temperature?

I've checked the minimum loop temperature is set to 0 and the maximum loop temperature is set to 80. When I tried to increase the minimum temperature from 0 to 20, the error message changed: Min=-56.215634 and the error occurred times increased to 146.

I have no idea where this -136 degree come from.

Thanks for your help. Thanks again.

Hi all. I used the new beta version of DesignBuilder to model the ASHP detailed HVAC system.

The ASHP will be used for heating and Hot water. I upload the HVAC system as shown below.

error I got: Last severe error=Plant temperatures are getting far too cold, check controls and relative loads and capacities

*** * Warning * Plant loop falling below lower temperature limit, PlantLoop="AUX HW LOOP"

*** * ~~~ * This error occurred 5 total times;

*** * ~~~ * during Warmup 5 times;

*** * ~~~ * during Sizing 0 times.

*** * ~~~ * Min=-136.598068

* PlantLoop Outlet Node (SupplySide) "AUX HW LOOP SUPPLY SIDE OUTLET" has temperature=-111.1 {C}*

I think this is the place where the error occurred, however, how can I increase the supply side outlet temperature?

I've checked the minimum loop temperature is set to 0 and the maximum loop temperature is set to 80. When I tried to increase the minimum temperature from 0 to 20, the error message changed: Min=-56.215634 and the error occurred times increased to 146.

I have no idea where this -136 degree come from.

Thanks for your help. Thanks again.