Hi everyone! I'm trying to simulate a residential retrofit project with the new proposed HVAC with both - an ASHP for HVAC with heat recovery and - an Heat Pump Water heater for DHW (domestic hot water) similar to this one here: https://www.energy.gov/energysaver/heat-pump-water-heaters
For the HVAC I've been using a "Air Loop Unitary HP Air to Air" with heat recovery turned on. This is supplied to all of the zones. For the Heat pump water heater for DHW I've put in a "Water Heater Heat Pump" and connected it to the DHW loop. The "water Heater Heat Pump" is located within a zone of the building since it'll be an indoor equipment using indoor air.
When I try to run this file, I get a severe error which mentions: "Plant temperatures are getting far too cold, check controls and relative loads and capacities"
I've tried to run this same file previously with a different DHW water heater system (sourced from electricity) and it has been working but I'm not sure how to model the system I'm referencing from the website mentioned above in conjunction with the ASHP HVAC system.
It'd be great to get some help with this issue as soon as possible. Thank you!
