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.
The first sketch
on the left shows the motor close to the
fan shaft but it may be more practical to move it
out so that a standard adjustable motor slide base
will give a greater adjustment range for belt
tension. Longer belt centers also result in higher
horse power.
Arrangement 9 Motor Base Positions
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.
Note: RIGHT and LEFT are viewed from the drive
side.
Axial and Inline Centrifugal
A/1L
- Arrangement 1 with motor on left. A/1R -
Arrangement 1 with motor on right.
Although appropriate for Axial Fans,
designations are
AMCA standard 99-2410-82
for Inline Centrifugal Fans. Alternate
designations are o'clock positions.
