Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Your fan pressure rise is 600 Pa (~2.4 in w.c.), which is unrealistically high for an indoor VRF terminal unit. I typically see around 0.3 in w.c. for external static pressure list on spec sheets, assume another ~0.1-0.2 in w.c. for coils gives around 0.5 in w.c. (125 Pa). Somewhere between 0.3-0.5 in w.c. (75-125 Pa) is a more appropriate value for a typical indoor VRF terminal unit, but the value could be anywhere between 0.25-1.25 in w.c. depending on the unit so you should look at the spec sheet.
Also check the run time for your fan. It looks like your fan may be running continuously when the VRF system is on, rather than cycling on/off as needed to meet the load in the space.
