Positions W & Z are the most compact if motor will fit close to fan. With the current trend to fans on unitary bases (Arrgt. 9H), this is more common than ever. Positions X & Y will typically take more space.
Note: RIGHT and LEFT are viewed from the drive side.
A/9R - Arrangement 9 with motor on right side of the bearing pedestal.
A/9L - Arrangement 9 with motor on left side of the bearing pedestal.
A/9T: - Arrangement 9 with motor on top of the fan housing.
A/9SL: - Arrangement 9 with motor on left side of fan housing.
A/9SR: - Arrangement 9 with motor on right side of fan housing.
A/1L - Arrangement 1 with motor on left.
A/1R - Arrangement 1 with motor on right.
Using analog clock hour:minutes is common to specify Arrangement 9 motor positions on axial fans including inline Centrifugal fans. Usually motor positions on these fans types is only important for the location of nameplates and mounting feet or brackets.
45° = 1:30 225° = 7:30
90° = 3:00 270° = 9:00
135° = 4:30 315° = 10:30
180° = 6:00 360° = 12:00
Note: Motor position viewed from drive end.