Greenheck CFSD-211 User Manual
Centrifugal Fans
Model LSF
Louvered Roof Supply Fans
August
2008
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Louvered Roof Supply Fan
Greenheck model LSF louvered roof supply fans
provide filtered make-up air in medium to high
pressure/high volume applications. The louvered
penthouse design provides an aesthetic look and
is designed to allow for maximum air intake without
the entry of rain and snow. For additional filtration of
supply air, the LSF is provided with 2-inch washable
aluminum filters.
Model LSF roof supply fans are available in twelve
wheel sizes, 12–36 in. (305-914 mm) with capacities
from 800 to 37,000 cfm (1,360-62,860 m3/hr) and
static pressures to 5.5 inches (1375 Pa). All fan
sizes are air and sound tested to ensure complete
and accurate performance ratings.
Wheels
LSF supply fans use double width centrifugal wheels. Heavy gauge wheels are
constructed with flat blades (sizes 12–16) and airfoil blades (sizes 18–36) to
provide efficient performance. All wheels are statically and dynamically balanced
to grade G6.3 per ANSI S2.19.
Service Features
Filtered supply fans require regular inspection and cleaning
(or replacement) of filters to ensure maximum efficiency and
cataloged performance. Model LSF louvered penthouses are
designed with hinged covers and quick release latches to permit
easy access.
With covers open, LSF fans offer complete accessibility from
above. Interior dimensions allow clearance for inspection, cleaning
or maintenance of the motor, wheel, belt(s) and drives. Filter racks
are designed to allow filters to slide out vertically for easy removal.
Compatible Products
Where Model LSF fans are selected, a group of compatible products offer uniform appearance on the roof. All
feature the same louvered penthouse styling:
WIH/WRH RSFPLDP/LBP
Gravity Intake & Relief Centrifugal Roof Exhauster
Direct & Belt Drive
2
Filtered Roof Supply Fan
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Construction Features
The model LSF penthouse hood is constructed of heavy gauge
extruded aluminum louvers. Fan sizes 12 thru 22 are fully factory
assembled with mitered and welded corners. Penthouse hoods on
sizes 24 thru 36 are shipped in sections. See complete details on
page 5.
Hinged cover panels allow quick access to the motor and drive
assembly. Covers are also insulated to prevent condensation.
Hood base panels include prepunched mounting holes for ease of
installation on the roof curb.
The base also elevates the louvers above roof level for protection
from splashing rain or drifting snow.
Motors - Heavy duty motors are carefully matched to the
1
fan load. See page 4 for motor options.
Motor Slide Base - Motor bases are slide-adjustable
2
for ease of maintaining proper belt tension. Bases for
motors with frame sizes 182T and larger include a screw
adjustment.
Shafts - Shafts are precision turned, ground and polished
3
steel sized so that the first critical speed is at least 25%
over the maximum operating speed.
Drives - Drives are sized for a minimum of 150% of
4
driven horsepower and factory set to the desired rpm.
Sheaves are machined cast iron and keyed securely to
fan and motor shafts. Motor pulleys are adjustable for
final system balancing.
Bearings - Highest quality bearings are mounted in cast
5
iron pillow blocks with grease fittings. Bearings are
designed specifically for air handling applications and
are selected for a minimum (L
hours. Precise self alignment reduces vibration for longer
bearing life.
) life in excess of 80,000
10
Filters - Filters are permanent, washable, 2 in. (51 mm)
6
aluminum mesh.
Filter Channels - Formed aluminum filter channels
7
allow filters to be easily removed or installed. Channels
also provide rigid support for the louvered sides of the
penthouse.
Lifting Lugs - Lifting lugs are provided for ease of
8
handling and installation with sizes 15 thru 36.
Fan Housings - Double width/double inlet fan housings
9
are constructed of heavy gauge steel.
Vibration Isolation Base - Structural steel isolation bases
10
with neoprene mounts limit noise transmission into the
building and provide rigid support for fan wheels, motors
and drives.
6
9
8
7
6
9
4
3
5
1
4
2
10
3
Options and Accessories
Options and Accessories
Duct Adapters
Duct adapters are mounted over the roof curb to locate the
top of the duct, limit performance losses by directing airflow
into the duct, and allow ductwork to be completed before the
fan is set in place. Duct adapters are standard with all sizes.
Roof Curbs
Model GPSHL prefabricated roof curbs are available for ease
of fan installation and to reduce installation costs. Curbs are
available in either 8 or 12 in. height (203 or 305 mm). Curbs
for fan sizes 24 thru 36 are shipped in sections for ease of
transportation and handling.
Dampers
Model VCD 1000 motorized intake dampers are designed for
horizontal mounting inside ductwork. Actuators are available
for 24, 115, 230 or 460 volt operation. Nominal damper sizes
and recommended roof curb opening dimensions are shown
in the Dimensional Data section of this catalog. Refer to the
Typical Installation section for damper location.
Motor Options
The chart below lists available motor options. Single phase
115/230 volt motors are available up to 2 hp. Three phase
motors are available up to 40 hp.
Single Speed 2 Speed-2 Winding
Open TE Open
115v
1 ph
* 1 speed, 3 phase motors are available in 200, 230/460 or 575 volt.
** 2 speed, 3 phase motors are available in either 200 or 230 volt up
to 10 hp, 460 volt up to 40 hp; for 575 volt, consult factory.
230v
1 ph
3 ph
115 or
*
230v
1 ph
*
3 ph
115 or
230v
1 ph
**
3 ph
Disconnect Switches
Disconnect switches allow positive electrical shutoff and
safety when servicing the fan. NEMA-1 switches are interior
mounted. NEMA-3R disconnects are exterior mounted on the
fan base.
Birdscreens
Rigid wire, 1/2 in. (13 mm) mesh screens are available in lieu of filters.
4
Handling and Installation
Handling and Installation
Handling and Installation (Sizes 24–36)
Sizes 24 through 36 are shipped in sections for ease of
handling on the jobsite.
Once the fan components are on the roof, final assembly
can be accomplished rapidly. Complete assembly
procedures are found in the LSF Assembly Instructions.
NOTE: LSF sizes 24 and larger can be shipped
completely assembled at additional cost. Consult factory
for details.
The assembled base pan is mounted on the
1
roof curb. The base pan also serves as a duct
adapter.
The motor, drives, blower and isolation base are
2
shipped preassembled on the support frame.
The complete assembly is then mounted over
the base pan.
4
Filters are inserted in channels from above.
The exterior base panels and louver sections
3
with covers are attached to the base support
frame. Louver sections include filter racks.
Center cover is installed, and side covers are
5
closed.
5
Dimensional Data
D
C
B
Y
E F
A*
LIFTING
BRACKETS
2½ inches
(63.5 mm)
ROL/2
ROL
Y/2
Y
A*
3/4 inch
(19 mm)
A/2
A/2
E F
A*
ROW/2
ROW
4.00
X/2
X
CONDUIT
LOCATION
Dimensional Data
Unit
A sq. B C D E F
Size
12 46 51
13 52 57
15 58 64 35
16 58 64 35
18 64 70 40
20 70 76 45
22 70 76 45
24 76 82
27 82 88
30 88 94
33 94 100
36 106 112
7
⁄8 357⁄16 12 19 27 18 14 22 18 16x20 (4), 20x20 (4) 5 445
15
⁄16 357⁄16 12 209⁄16 317⁄16 20 16 24 20 20x20 (8) 5 500
7
⁄16 12 221⁄4 353⁄4 22 16 26 20 20x20 (4), 20x25 (4) 5 689
7
⁄16 12 247⁄16 339⁄16 24 18 28 22 20x20 (4), 20x25 (4) 5 724
15
1
⁄8 501⁄8 143⁄8 3413⁄16 413⁄16 36 26 40 30 16x20 (24) 8 1694
1
⁄8 545⁄8 183⁄8 381⁄16 4315⁄16 40 30 44 34 16x20 (16), 16x25 (8) 8 1931
1
⁄8 x 1061⁄8 565⁄8 193⁄8 42 46 44 32 48 36 16x25 (12), 20x25 (12) 9 2316
1
⁄8 x 1121⁄8 635⁄8 193⁄8 457⁄8 481⁄8 48 36 52 40 20x20 (32) 10 2687
1
⁄8 x 1241⁄8 695⁄8 203⁄8 503⁄8 555⁄8 52 40 56 44 20x20(8), 25x25(8), 20x25(16) 11 3246
⁄16 12 263⁄4 371⁄4 26 20 30 24 25x25 (8) 6 901
15
⁄16 17 29 41 30 22 34 26 20x25 (8), 16x25 (4) 6 1063
15
⁄16 17 317⁄8 381⁄8 32 24 36 28 20x25 (8), 16x25 (4) 6 1148
All dimensions shown are in inches.
*Dimension A given is the inside dimension of the fan curb cap.
The roof curb should be 11⁄2 inches (38 mm) less than the curb cap to allow for roofing and flashing.
For complete dimensional data, refer to the Greenheck CAPS (Computer Aided Product Selection) program.
Duct / Damper
X Y ROW ROL
Min. Roof
Opening
Nominal Filter Sizes
6
(Quantity)
Louver
Tiers
Weight
(lbs.)
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