[Equest-users] Why Is There No Heating Capacity in PVAV Zones When Converted From PSZ in Detailed Edit?

[Kathryn Kerns]

Everyone, I converted a model with a bunch of Pkgd Single Zone units
(furnace heat, DX cooling) to a Pkgd Var Vol system (electric heat, DX
cooling) with zones in Detailed Edit. The converted program ran but the
unmet heating hours increased greatly. I checked the new PVAVS zones,
and they are grouped correctly under the Pkgd Var Vol system, but the
program is not assigning any heating capacity to the individual zones. I
checked the heating capacities in the SV-A reports and all of the zone
capacities are 0. I then built a Design Wizard Pkgd Var Vol model and
started comparing the HVAC navigation tree screens to the Detailed Edit
converted model HVAC navigation tree screens and found some
discrepancies. I found that the converted Detailed Edit zones lacked the
minimum flow ratio (0.3) so I added that in. I also discovered that the
thermostat type didn't convert to Reverse Acting so I fixed that. I
don't see any other differences between the Design Wizard HVAC
navigation tree screens and the converted Detailed Edit HVAC navigation
tree screens, and yet the fact remains, I am not get any heating
capacity to show up in SV-A in the Detailed Edit converted model. So,
there is something else I need to change, but I can't think what.

 

Has anybody run across this problem before and has a solution?

 

Thanks.

 

 

Kathryn Kerns

Systems Specialist

BCE Engineers, Inc.

| Ph: 253.922.0446 | Fx: 253.922.0896 | 

 

 

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