Greenheck Fan QEP - Manual (Page 12)

Direct drive construction offers many advantages for commercial or
industrial air handling applications.
- Reduced maintenance (no belts and shaft bearings to service)
- Compact housing design requires a smaller footprint
- Low vibration
- Suitable for clean air application (no belt or bearing residue in airstream)
Flow Control Options
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ESJWF
NPEFMT
SFRVJSF
B
WBSJBCMF
GSFRVFODZ
ESJWF
7'%

PS
B
QBSUJBM

width wheel to assist in matching actual fan performance to the desired
QPJOU
PG
PQFSBUJPO
"
7'%
BMMPXT
UIF
GBO
QFSGPSNBODF
UP
CF
BEKVTUFE
UP

assist in system balancing and provides flexibility in adapting to future
TZTUFN
DIBOHFT
7'%T
JO
DPOKVODUJPO
XJUI
B
2&.
PS
2&1
DBO
BTTJTU
JO

reducing energy consumption. Partial wheel widths can also be used to
attain a specific fan performance. Partial wheel widths are available in

JODSFNFOUT
SBOHJOH
GSPN
o
The charts on these pages allow for a quick estimation of the required fan
size and motor speed to achieve the desired point of operation. Colored
bands for a given size in each chart show the acceptable performance
range for the most commonly selected fan sizes at a given motor speed.
For detailed selection information, please consult our Computer Aided
Product Selection (CAPS) software.
Direct Drive
Selections


QEP Arrangement 4
Horizontal, Direct Drive
QEM Arrangement 4
Horizontal, Direct Drive
7PMVNF
DGN
Y

4
3
2
1
0
1 5 10 50 100
15 16 18 20 22 24 27 30 33 36 40
4
3
2
1
0
1 5 10 50 100
15 16 18 20 22 24 27 30 33 36 40 44 49 54 60
Static
Pressure
(in. wg)
7PMVNF
DGN
Y

Static
Pressure
(in. wg)
1425 RPM
(50 Hz)
Model QEM
4J[FT
‰
Model QEP
4J[FT
‰
950 RPM
(50 Hz)
Model QEM
4J[FT
‰
Model QEP
4J[FT
‰
Direct Drive models are not licensed to bear the AMCA Seal
12