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Is it possible to apply an On/Off schedule to an entire VRF system in OS or does this have to be done terminal-by-terminal?

asked 2018-10-19 16:22:00 -0500

I'm trying to model a VRF system in a building that completely shuts down HVAC systems over night and I'm trying to avoid schedule each terminal this way. Other HVAC systems allow you to apply a schedule to the overall system. Is this possible with VRF? If so, how do I access the feature?

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answered 2018-10-21 00:17:18 -0500

The AirConditioner:VariableRefrigerantFlow system object has an availability schedule field.

"This alpha field defines the name of the schedule (ref: Schedule) that denotes whether the heat pump operates during a given time period. A schedule value equal to 0 denotes that the heat pump must be off for that time period. A value other than 0 denotes that the heat pump is available to operate during that time period. This schedule may be used to completely disable the heat pump (and all of its terminal units) as required. If this field is blank, the unit is enabled the entire simulation."

You can set it in the OpenStudio app in the HVAC systems tab under the VRF system dropdown and clicking on the VRF system object.

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Perfect. Thanks!

Didn't see that the system block was "clickable"

jbatt's avatar jbatt  ( 2018-10-22 06:36:26 -0500 )edit

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Asked: 2018-10-19 16:22:00 -0500

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Last updated: Oct 21 '18