Vesta Setup
The RM-1210 relay box, the VS-1108 variable speed control, and the two sensors were connected to the Vesta. All of the signals relating to these devices were given user-friendly names:
- GH Office Tstat - Vesta discrete input, TRUE if thermostat is calling for heat
- Mech Room Tstat - Vesta discrete input, TRUE if thermostat is calling for heat
- Slab Heat Demand - Vesta discrete input, TRUE if greenhouse controller is calling for heat
- Bench Heat Demand - Vesta discrete input, TRUE if greenhouse controller is calling for heat
- GH Glycol Hot Supply - Temperature of Glycol being supplied to the greenhouse
- GH Return To Tank - Temperature of the water being returned to storage
- P15 GH HX Pump - Vesta variable speed output driving P15
In addition to these inputs and outputs, three internal variables were created to support management of the greenhouse:
- GH Low Demand - TRUE if any low-temperature greenhouse zone is calling for heat
- GH Demand - TRUE if any greenhouse zone is calling for heat
- Greenhouse Target - desired Glycol temperature