Revision history [back]

I'd like to use two HVAC systems in one zone.

The first one is a "normal" system responsible for internal temperature, for instance a ZoneHVAC:Baseboard:RadiantConvective:Water.

The second one is an ZoneHVAC:IdealLoadsAirSystem. Its job is to supply air into the zone with given temperature, humidity ratio and massflow specified by an EMS program and its actuators.

The problem is: an EMS Actuator can override the IdealLoadsAir Massflow as far as it's on. When no cooling or heating is needed, the IdealLoadsAirSystem is off regarles of my helpless little EMS Actuator. The oly way I could make the IdealLoadsAirSystem operate all the time is by specifying an extreme setpoint, e.g -50 °C. It's fine by the IdealLoadsAirSystem because the EMS Actuator overrides its supply temperature, but this setpoint messes up the operation of the other "normal" system. (the other system can be anything else, not just a convective system. I need cooling and heating too in the zones)

Is there a way to specify a different Thermostat setpoint for the IdealLoadsAir other than the one for the "normal" system. As far as I know I can only have one thermostat in a single zone, and the IdealLoadsAirSystem reads the thermostat of the zone it's supplying to. (is this correct?) Maybe I'm looking for something like: "Controlling Zone or Thermostat Location" to set up a dummy zone somewhere with extreme setpoints. AirLoopHVAC:UnitarySystem has this thing. But I don't think that IdealLoadsAir has something similar. Or is there a simpler way to turn on the IdealLoadsAir all the time?

thanks,

I'd like to use two HVAC systems in one zone.

The first one is a "normal" system responsible for internal temperature, for instance a ZoneHVAC:Baseboard:RadiantConvective:Water.

The second one is an ZoneHVAC:IdealLoadsAirSystem. Its job is to supply air into the zone with given temperature, humidity ratio and massflow specified by an EMS program and its actuators.

The problem is: an EMS Actuator can override the IdealLoadsAir Massflow as far as it's on. When no cooling or heating is needed, the IdealLoadsAirSystem is off regarles of my helpless little EMS Actuator. The oly way I could make the IdealLoadsAirSystem operate all the time is by specifying an extreme setpoint, e.g -50 °C. It's fine by the IdealLoadsAirSystem because the EMS Actuator overrides its supply temperature, but this setpoint messes up the operation of the other "normal" system. (the other system can be anything else, not just a convective system. I need cooling and heating too in the zones)

Is there a way to specify a different Thermostat setpoint for the IdealLoadsAir other than the one for the "normal" system. As far as I know I can only have one thermostat in a single zone, and the IdealLoadsAirSystem reads the thermostat of the zone it's supplying to. (is this correct?) Maybe I'm looking for something like: "Controlling Zone or Thermostat Location" to set up a dummy zone somewhere with extreme setpoints. AirLoopHVAC:UnitarySystem has this thing. But I don't think that IdealLoadsAir has something similar. Or is there a simpler way to turn on the IdealLoadsAir all the time?

thanks,

I'd like to use two HVAC systems in one zone.

The first one is a "normal" system responsible for internal temperature, for instance a ZoneHVAC:Baseboard:RadiantConvective:Water.

The second one is an ZoneHVAC:IdealLoadsAirSystem. Its job is to supply air into the zone with given temperature, humidity ratio and massflow specified by an EMS program and its actuators.

The problem is: an EMS Actuator can override the IdealLoadsAir Massflow as far as it's on. When no cooling or heating is needed, the IdealLoadsAirSystem is off regarles of my helpless little EMS Actuator. The oly way I could make the IdealLoadsAirSystem operate all the time is by specifying an extreme setpoint, e.g -50 °C. It's fine by the IdealLoadsAirSystem because the EMS Actuator overrides its supply temperature, but this setpoint messes up the operation of the other "normal" system. (the other system can be anything else, not just a convective system. I need cooling and heating too in the zones)

Is there a way to specify a different Thermostat setpoint for the IdealLoadsAir other than the one for the "normal" system. As far as I know I can only have one thermostat in a single zone, and the IdealLoadsAirSystem reads the thermostat of the zone it's supplying to. (is this correct?) Maybe I'm looking for something like: "Controlling Zone or Thermostat Location" to set up a dummy zone somewhere with extreme setpoints. AirLoopHVAC:UnitarySystem has this thing. But I don't think that IdealLoadsAir has something similar. Or is there a simpler way to turn on the IdealLoadsAir all the time?

thanks,