Installation
Inspect the unit for any damage and report it to the shipper immediately.. Also, check to see that all accessory items are accounted for..
Move the fan to the desired location and fasten securely through mounting holes provided in the base angles.. The unit must be set level (shimming may be necessary).. Flexible duct connections and vibration isolators should be used where noise is a factor..
The motor voltage and ampere rating must be checked for compatibility with the electrical supply prior to final electrical connection.. Supply wiring to the fan must be properly fused, and conform to local and national electrical codes..
The discharge is factory set as specified by customer order, however, it can be rotated to other discharge positions in the field if necessary.. Removal of the housing bolts allows the discharge to be rotated to the clockwise positions below.. For TAD, BD and BAD discharge positions, a portion of the frame angle must be removed..
Clockwise rotation shown.. Counterclockwise discharge positions are a mirror image of those shown.. Fan rotation is always specified from the drive side of the housing..
Discharge Positions
CW BH | CW BAU | CW UB | CW TAU |
CW TH | CW TAD | CW DB |
CW BAD
Affect of Installation on Performance
Restricted or unstable flow at the fan inlet can cause
The examples below show the system layout and inlet and discharge configurations which can affect fan performance..
Discharge Configurations
7o MAX.
POOR | FAIR | GOOD |
POOR | POOR | FAIR |
| Turning | One |
| Impeller | |
| Varies | |
| Dia. | |
|
| |
|
| Should be at least |
|
| 1/2 Impeller Dia. |
POOR | FAIR | GOOD |
POOR | FAIR | GOOD |
|
| Not Greater than |
|
| 60o Including Angle |
POOR | POOR | FAIR |
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Centrifugal Utility Fans 3
