DDC Control System
AssemblyThe direct-digital controller and sensor set that runs the unit: duct-pressure fan control, discharge-temperature coil sequencing, economizer logic, and BACnet integration. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for DDC Control System
8 top-level lines as of r1987| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | DDC Controller Board 6 parts | air-handling-unit-ddc-board | 1× | 1 | 0 | assembly |
| 2 | Duct Temperature Sensor | air-handling-unit-temp-sensor | 4× | 4 | · | part |
| 3 | Humidity Sensor | air-handling-unit-humidity-sensor | 2× | 2 | · | part |
| 4 | Pressure Sensor | pressure-sensor | 2× | 2 | · | part |
| 5 | Coil Valve & Actuator | air-handling-unit-valve-actuator | 2× | 2 | · | part |
| 6 | Relay | relay | 4× | 4 | · | part |
| 7 | Wire Bundle | wire-bundle | 2× | 2 | · | part |
| 8 | Connector | connector | 10× | 10 | · | part |