[EnergyPlus_Support] RE: Missing humidity ratio setpoint for controller

At first glance it looks right. Should the relative humidity inputs be fractional or percentage, i.e. 0-1 or 0-100?

---In EnergyPlus_Support@xxxxxxxxxxxxxxx, <fpasserini.tn@...> wrote:

I'm getting the following severe error for many air loops.

** Severe ** HVACControllers: Missing humidity ratio setpoint for controller type=Controller:WaterCoil Name="AIR LOOP 0TERRA MAG_UFF_SUD2 AHU/1 COOLING COIL CONTROLLER"

** ~~~ ** Node referenced (by controller)=AIR LOOP 0TERRA MAG_UFF_SUD2 SUPPLY SIDE OUTLET 1

** ~~~ ** use a SetpointManager with the field Control Variable = "HumidityRatio" to establish a setpoint at the controller sensed node.

The goal of those air loops is the dehumidification. The designers want to avoid that the RH is greater than 50% in all the zones that are supplied by the AHU.

I'm using the following objects:

AirLoopHVAC:ControllerList,

Air Loop 0terra mag_uff_sud2 Controllers, !- Name

Controller:WaterCoil, !- Controller 1 Object Type

Air Loop 0terra mag_uff_sud2 AHU/1 Cooling Coil Controller; !- Controller 1 Name

Controller:WaterCoil,

Air Loop 0terra mag_uff_sud2 AHU/1 Cooling Coil Controller, !- Name

HumidityRatio, !- Control Variable

Reverse, !- Action

Flow, !- Actuator Variable

Air Loop 0terra mag_uff_sud2 Supply Side Outlet 1, !- Sensor Node Name

Air Loop 0terra mag_uff_sud2 AHU/1 Cooling Coil Water Inlet Node, !- Actuator Node Name

autosize, !- Controller Convergence Tolerance {deltaC}

autosize, !- Maximum Actuated Flow {m3/s}

0.000; !- Minimum Actuated Flow {m3/s}

SetpointManager:MultiZone:Humidity:Maximum,

SM 0terra mag_uff_sud2, !- Name

Air Loop 0terra mag_uff_sud2, !- HVAC Air Loop Name

0.005, !- Minimum Setpoint Humidity Ratio {kgWater/kgDryAir}

0.012, !- Maximum Setpoint Humidity Ratio {kgWater/kgDryAir}

SM 0terra mag_uff_sud2 Node List; !- Setpoint Node or NodeList Name

NodeList,

SM 0terra mag_uff_sud2 Node List, !- Name

Air Loop 0terra mag_uff_sud2 Supply Side Outlet 1; !- Node 1 Name

A zone that is supplied by that AHU is 0terra:Magazzino:

ZoneControl:Humidistat,

0terra:Magazzino Humidistat, !- Name

0terra:Magazzino, !- Zone Name

Off, !- Humidifying Relative Humidity Setpoint Schedule Name

63; !- Dehumidifying Relative Humidity Setpoint Schedule Name

! Schedule: Relative humidity setpoint schedule: Always 50.00

Schedule:Compact,

63, !- Name

Any Number, !- Schedule Type Limits Name

Through: 12/31, !- Field 1

For: AllDays, !- Field 2

Until: 24:00, 50; !- Field 4

Shall I use another kind of setpointmanager? I saw that SetpointManager:Scheduled:DualSetpoint works only with temperature (see the field â??Control Variableâ??); it doesn't work with humidity.

Regards