Greenheck Fan Model SFD Manual De Usuario
3
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 .
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 .
Affect of Installation on Performance
Restricted or unstable flow at the fan inlet can cause
pre-rotation of incoming air or uneven loading of the
fan wheel, yielding large system losses, increased
sound levels and structural failure of the fan wheel .
Free discharge or turbulent flow in the discharge
ductwork will also result in system effect losses .
The examples below show the system layout and
inlet and discharge configurations which can affect
fan performance .
pre-rotation of incoming air or uneven loading of the
fan wheel, yielding large system losses, increased
sound levels and structural failure of the fan wheel .
Free discharge or turbulent flow in the discharge
ductwork will also result in system effect losses .
The examples below show the system layout and
inlet and discharge configurations which can affect
fan performance .
GOOD
POOR
POOR
FAIR
7
o
MAX.
POOR
FAIR
POOR
FAIR
One
Impeller
Dia.
GOOD
Should be at least
1/2 Impeller Dia.
FAIR
Not Greater than
60
o
Including Angle
POOR
POOR
FAIR
GOOD
POOR
Turning
Varies
CW BH
CW BAU
CW TAU
CW UB
CW TH
CW TAD
CW BAD
CW DB
Discharge Positions
Discharge Configurations
3
Centrifugal Utility Fans
®