Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Reviewing your input file I see one field that looks odd. Is this some form of parametrics? Or did you forget to specify the thermostat control zone name?
AirConditioner:VariableRefrigerantFlow,
VRF Outdoor Unit, ! - Component name
<Select zone>, ! - Zone name for master thermostat location
There was a correction to the VRF condenser where hard-sized condenser water flow rates were not passed to the plant loop #4942. This fix is included in V8.4.0.
I suggest upgrading to the latest version of E+ to see if the problem persists.
| | 2 | No.2 Revision |
Reviewing your input file I see one field that looks odd. Is this some form of parametrics? Or did you forget to specify the thermostat control zone name?
AirConditioner:VariableRefrigerantFlow,
VRF Outdoor Unit, ! - Component name
<Select zone>, ! - Zone name for master thermostat location
There was a correction to the VRF condenser where hard-sized condenser water flow rates were not passed to the plant loop #4942. This fix is included in V8.4.0.
I suggest upgrading to the latest version of E+ to see if the problem persists.
Regarding the unmet hours in the simulation, I see warnings where the unit was turned off due to out of range conditions (I used Vancouver Int'l BC CAN weather so your warnings may differ).
Check for these types of warnings in your error file. These warnings mean the VRF system will be turned off and the zone load will not be met which in turn will lead to unmet hours.
** Warning ** AirConditioner:VariableRefrigerantFlow "VRF OUTDOOR UNIT".
** ~~~ ** ...InitVRF: VRF Heat Pump Min/Max Operating Temperature in Heating Mode Limits have been exceeded and VRF system is disabled.
** ~~~ ** ... Outdoor Unit Inlet Water Temperature = -20.348
** ~~~ ** ... Heating Minimum Outdoor Unit Inlet Temperature = -20.000
** ~~~ ** ... Heating Maximum Outdoor Unit Inlet Temperature = 40.000
** ~~~ ** ... Check VRF Heat Pump Min/Max Outdoor Temperature in Heating Mode limits.
** ~~~ ** During Warmup, Environment=UNTITLED, at Simulation time=01/01 02:00 - 02:15
