Return Fan Section
AssemblyA second plenum fan that pulls air back from the occupied space, overcoming return-duct losses and enabling economizer relief. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Return Fan Section
5 top-level lines as of r1968| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Plenum Fan Wheel | air-handling-unit-fan-wheel | 1× | 1 | · | part |
| 2 | Fan Motor 5 parts | air-handling-unit-fan-motor | 1× | 1 | 0 | assembly |
| 3 | Fan Frame | air-handling-unit-fan-frame | 1× | 1 | · | part |
| 4 | Vibration Isolator | air-handling-unit-isolator | 4× | 4 | · | part |
| 5 | Variable-Frequency Drive 5 parts | air-handling-unit-vfd | 1× | 1 | 0 | assembly |