Greenheck RSF Series Installation guide

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GREENHECK
P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410
PH. 715-359-6171
®
Read and save these instructions PN 453148
ROOF SUPPLY FANS
MODELS RSF AND RSFP
INSTALLATION, OPERATING AND MAINTENANCE MANUAL
MODEL RSF MODEL RSFP
DIMENSIONAL DATA
B SQ.
A SQ.
C
D
21/2"
BL SQ.
A SQ.
CL
D
21/2"
J
F
J
GH
A
RSF RSFP BASE OF UNIT
L
SQ.
K
SQ.
M
M
M
OPTIONAL DUCT ADAPTER
Fan
Size A SQ. B SQ. BL SQ. CCLD F GH J K SQ. L SQ. MLouver
Tiers
RSFP
Nominal
Filter Weights
RSF RSFP
90 26 351/8317/8231/4243/8101/4121/4103/475/867/8241/2121/461/8(4) 12x20 3 145 126
100 30 411/8357/8231/4253/8101/4135/8117/891/16 83/16 281/2141/471/8(4) 12x25 3 173 146
120 34 471/8397/8271/4293/8101/4161/8137/8101/16 815/16 321/2181/471/8(4) 16x25 4 225 180
150 40 531/8457/8311/4333/8101/4191/8161/2111/4107/16 381/2201/491/8(8) 16x20 5 336 250
180 46 611/8517/8341/4353/8121/4221/2191/2101/8113/4441/2261/491/85 400 285
200 52 731/8583/16 391/4403/8121/4231/4251/4133/8143/8501/2301/4101/8(8) 20x25 6 620 431
(4) 16x20
(4) 20x20

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Greenheck Model RSF and RSFP fans are thoroughly inspected and test run at the factory, however damage may occur
during handling and shipping. Consequently, it is important to inspect the unit for visible and concealed damage before
beginning installation. Report any damage to the shipper immediately. In addition, assure all accessory items are
accounted for.
LIFTING
Lifting the RSF and RSFP model fans must be done
with care to avoid damaging the housing. For Model RSF
attach four lifting devices under the outer housing, each
device beneath the vertical row of fasteners (Figure 1).
Lifting devices should be a minimum of 3" wide to avoid
damaging the sheet metal housing. Do not lift Model RSF
near the center of the outer housing.
For Model RSFP attach a minimum of four lifting
devices under an exterior louver panel, each device near
the corner of the louvered housing.
INSTALLATION
Move the fan to its intended location and fasten it securely through mounting holes provided in the fan base. Shims
may be necessary depending upon thickness of the roofing material. For ducted applications, an optional duct adapter (if
provided) is attached and holds the ductwork in place prior to installing the unit. The following diagram shows a typical
installation with prefab roof curb and ductwork.
Access to the motor compartment is made by releasing four latches which secure the cover. The cover should be placed
in an area where wind will not blow it off the roof.
ELECTRICAL CONNECTION
The electrical supply must be compatible with the fan motor with regard to voltage, phase and amperage capacity.
Moreover, the electrical supply line must be properly fused and conform to local and national electrical codes.
Electrical lead-in wires should be routed through the pre-punched hole in the optional duct adapter (if provided) and the
punched hole in the bottom of the fan housing. Electrical wires must be located so as not to rub on moving
components. The electrical supply line is connected to the optional safety disconnect switch (if provided) or wired
directly to the motor.
Fig. 1
Lift Here
Lift Here
TYPICAL INSTALLATION
RSF unit with
prepunched mounting
holes and 21/2inch skirt
to aid in installation.
Ductwork (by others)
Duct adapter (optional)
allows ductwork to be
completed prior to
setting unit on curb.
Roof Curb
Fan Curb
Size* Recom.
Roof
Opening
Duct
Size
ID
Nominal
Damper
Size
RSF/RSFP- 90 241/215 12 12 x 12
RSF/RSFP- 100 281/217 14 14 x 14
RSF/RSFP- 120 321/221 18 18 x 18
RSF/RSFP- 150 381/223 20 20 x 20
RSF/RSFP- 180 441/229 26 26 x 26
RSF/RSFP- 200 501/233 30 30 x 30
Note: In cases where extreme snow depths may be
encountered, extended base may be required to raise unit
or condensation pans may be required in ductwork.
*Recommended curb size shown is outside curb
dimension without roofing and flashing.
DIMENSIONS

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PRE-STARTING CHECKS
Note: For units shipped with motor and drives separate, refer to the Motor Mounting Instructions included in the
hardware bag.
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WARNING
DISCONNECT AND SECURE TO THE “OFF” POSITION ALL ELECTRICAL POWER TO THE FAN PRIOR TO INSPECTION OR
SERVICING. FAILURE TO COMPLY WITH THIS SAFETY PRECAUTION COULD RESULT IN SERIOUS INJURY OR DEATH.
★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★★
Check all fasteners and set screws for tightness.
Rotate the fan wheel by hand to assure it turns freely
and is centered between the inlets. Check pulleys and
belts for proper alignment to avoid premature belt wear,
noise, vibration and power loss. Motor and fan pulleys
must be parallel and in line as shown in Figure 2.
The adjustable motor pulley is set at the factory for
the fan RPM specified. Fan speed can be increased by
closing or decreased by opening the adjustable motor
pulley. Two groove variable pitch pulleys must be
adjusted an equal number of turns open. Any increase
in fan speed results in an increase in horsepower
required for the motor. Motor load amperes should
always be checked and compared to nameplate rating
when changing fan speed.
Direction of fan wheel rotation is critical. A fan wheel
rotating in the wrong direction will result in reduced
airflow, motor overloading and possible burn-out. Check
wheel rotation by momentarily turning the fan on.
Rotation should be in the same direction as airflow at
the outlet. See housing and wheel examples in Figure 3.
IMPORTANT NOTE: RSF/RSFP fans should be operated
only when attached to the completed system. Without
proper static pressure loading, the motor may be
overloaded and burnout occur.
ROUTINE MAINTENANCE
See WARNING above
To preserve the reliability and performance designed into the fan, regularly scheduled maintenance should be
performed. Items to be checked at each maintenance interval are filters, belts, bearings, fasteners, lubrication and
removal of dust and dirt.
FILTERS
1" washable aluminum mesh filters are standard on Model RSF and RSFP fans. (Optional 2" filters may be supplied
on some fans). Filters should be cleaned on a regular basis for optimum efficiency.
To remove the filters, first remove the fan cover by releasing the four latches. (Place the cover in an area where
wind will not blow it off the roof). The filters can be lifted out and washed in a mild detergent solution. If desired, an
adhesive spray available at most filter distributors can be applied to increase filter efficiency.
BELTS
Belt tension should be checked two times during the first 24 hours of operation and during each scheduled
maintenance thereafter. Premature belt failures are frequently caused by improper belt tension, either too tight or loose.
The proper belt tension for operating a V-belt is the lowest tension at which the belt will not slip at peak load
conditions. For initial tensioning, belt deflection should be 1/64" for each inch of belt span, determined by using
moderate thumb pressure half way between pulley centers. For example, the belt deflection should be 1/2 inch if the belt
span is 32 inches (Figure 4).
WRONG WRONG CORRECT
R
O
T
A
T
I
O
N
RR
OO
TT
AA
TT
II
OO
NN
AIRFLOW
Fig. 2
Fig. 3

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Belt tension can be adjusted by loosening the motor plate hinge bolts and
adjusting the jack screws as required. RSF/RSFP units are supplied with either a
painted steel motor bracket or a galvanized motor plate for larger motor frames. To
adjust belt tension on units equipped with the painted steel motor bracket, simply
adjust the single jack screw.
For units equipped with a galvanized motor plate, both jack screws must
be adjusted equally. Check pulley and belt alignment after adjusting belt tension
(Figure 2).
LUBRICATION
Fan bearings on Model RSF and RSFP are permanently lubricated. Motor bearings equipped with grease
fittings should be lubricated in accordance with instructions on the motor nameplate. Motors without grease fittings
are lubricated for life.
CLEANING
Motors and Fan Wheels require periodic cleaning to remove dust and dirt which may accumulate. Motor cleaning
should be limited to the exterior surface only. Removing dust and dirt from the motor housing assists in motor cooling
and prolongs motor life. Motors should never be sprayed with steam, water or solvents.
Fan wheels which are left to accumulate dust and dirt will have poor air performance, loss of efficiency and possible
damaging vibration due to an unbalanced condition.
Periodic cleaning is a good investment in preserving the reliability and performance designed into the fan.
*Galvanized motor plate shown. Painted steel motor bracket used on units with smaller motor frame sizes.
NOTE: The unit serial number, located on the Greenheck name tag, should be provided when requesting parts or
information.
PARTS LIST
Filters
Shaft Pulley
Blower Mounting Angle
Shock Mounts (4)
Motor Pulley
Motor
*Motor Plate
Blower Unit
Belt
IOM RSF/RSFP 7-98 R
Belt Span
Deflection =
Belt Span
64
Fig. 4
WARRANTY
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the
date of purchase. Any units or parts which prove to be defective during the warranty period will be replaced at our option when
returned to our factory, transportation paid.
The motor is warranted by the motor manufacturer for a period of one year. Should the motor prove defective during this
period, it should be returned to the nearest authorized motor service station. Greenheck will not be responsible for any
installation or removal costs.