Greenheck BDF User manual

K*
D
E
H
B
2
C
F
J
G
I
J
G
F
I
C
2
A
B
D
E
H
CA
A
C
BDF
Unit
Access
Panel
Filter
Box
Access
Panel
M*
M*
Upon receiving unit, check for any damage and report it immediately to the shipper. Also check to see that all accessory
items are accounted for.
Move fan to desired location and determine position of access panels and motor. Attach the fan to a suitable framework
as specified (hanging or base vibration isolators are recommended). See chart below for dimensions of vibration isolator
centerlines (Fig. 1). See Fig. 2 and 3 for physical dimensions.
The motor
’ s amperage and voltage ratings must be checked for compatibility to supply voltage prior to final electrical
connection. Supply wiring may be routed through knockouts which are provided on the top and bottom of each fan housing.
Provide adequate wiring to permit the access doors to open for servicing. Wiring should be secured inside the fan to prevent
interference with the drive components. All wiring must conform to local and national codes.
Inlet and discharge collars are provided for duct connection. The inlet panel is removable for attaching optional filter box
accessory.
VIBRATION ISOLATOR DIMENSIONAL DATA
BDF DIMENSIONAL DATA
Fig. 1
BDF Unit BDF w/ Filter Box
Fig. 2 Fig. 3
M* applies to optional filter box only.
®
READ AND SAVE THESE INSTRUCTIONS
Model BDF
Belt Drive Duct Fan
PN 458341
Installation, Operation and Maintenance Manual
K* is length of fan and filter box combined.
Unit Size A C M*
80 203/42211/16 265/16
90 213/4255/8301/2
100 233/4271/8252/5
120 301/2315/8307/16
150 32 35 271/8
180 373/844 3415/16
200 473/8511/236
Unit
Size AB
CD E FGH I JK*
Filter
Size
Number
of Filters
Material
Thickness (ga.)
Approx. Wt. (lbs)
Fan Filter Box
80 231/4181/215
7/8
15
3/16
12
11/16
9
3/4
8
7/8
15
3/841/4493/416 x 20 2
20 71 32
90 241/4211/418
3/4
18
1/4
15
7/8
12
1/4
10
1/2
16
3/4
41/254
7/820 x 25 2 20 92 42
100 261/4223/420
3/4
19
3/4
17
7/8
13
3/4
11
7/8
17
3/841/251 7/820 x 20 2 20 107 52
120 33 271/422
3/4
24
1/8
19
7/8
16 13
3/8
17
7/855/8639/16
12 x 25 4 20 144 70
150 343/4325/827
3/4
28
5/8
23
7/8
19
1/8
16
3/8
1
1/2
9
7/863/4621/16
16 x 20 8 20 223 97
180 401/4413/431
3/4
37
1/2
27
7/8
22
1/2
18
7/8
1
1/2
10
1/295/8753/8
20 x 25 6 20 307 134
200 501/4491/439
3/4
45
1/8
36 23
1/8
25
1/4
1
1/2
12
1/213 85 1/416 x 25 12 20 565 174

Fig. 4
If adjustments are made, it is very important to check the pulleys for proper alignment. Misaligned pulleys lead to excessive
belt wear, vibration, noise and power loss. (See Fig. 5)
For all BDF units, belt tension can be adjusted by loosening four fasteners (marked “R”) on the drive frame. The motor plate
slides on the slotted adjusting arms (see Fig. 6). Belt tension should be adjusted to allow 1/64” of deflection per inch of belt
span. For example, a 15” belt span should have 15/64” (or about 1/4”) of deflection with moderate thumb pressure at mid-
point between pulleys (See Fig. 7). Over tightening will cause excessive bearing wear and noise. Too little tension will cause
slippage at startup and uneven wear.
The adjustable motor pulley is factory set for the RPM specified. Speed can be increased by closing or decreased by opening
the adjustable motor sheave. Two groove variable pitch pulleys must be adjusted an equal number of turns open or closed.
Any increase in speed represents a substantial increase in the horsepower required by a unit. Motor amperage should always
be checked to avoid serious damage to the motor when speed is varied.
CORRECT WRONG WRONG WRONG
Fig. 5
R
Belt Span
Deflection = Belt Span
64
NOTE:
Identical fasteners on
opposing side must
also be loosened.
Fig. 6 Fig. 7
2
PRE-STARTING CHECKS
Check all fasteners for tightness. The wheel should rotate freely and not rub on the inlet venturi’s. Turn the fan on momentarily
to check for unusual vibration or noise. Do not run the fan more than a few seconds without being connected to the system
for which it was designed. Motor overloading and burnout may result from lack of system static pressure.
Also check direction of wheel rotation. Improper rotation will result in reduced airflow and pressure capabilities. Rotation is
always in the same direction as airflow at the outlet. See housing and wheel examples in Figure 4.
AIRFLOW
R
O
T
A
T
O
I
N
AIRFLOW
R
O
T
A
T
O
I
N

MAINTENANCE
Belts tend to stretch after a period of time. They should be checked periodically for wear and tightness. When replacing belts,
use the same type as supplied with the unit. Matched belts should always be used on units with multigroove pulleys. For belt
replacement, loosen the tensioning device far enough to allow removal of the belt by hand. Do not force belts on or off. This
may cause cords to break, leading to premature belt failure. Once installed, adjust belts as shown in “Pre-Starting Checks.”
Shaft bearings can be classified in two groups: relubricating and non-relubricating. Bearings on sizes 80 through 180
are factory lubricated and require no further lubrication under normal use (between -20°F and 180°F in a relatively clean
environment). Bearings on size 200 are relubricatable. These bearings will require frequent lubrication. Caution should be
employed to prevent overpacking or contamination. Grease fittings should be wiped clean. The unit should be in operation
while lubricating. Extreme care should be used around moving parts. Grease should be pumped in very slowly until a slight
bead forms around the seal. A high grade lithium base grease is recommended.
Motor maintenance is generally limited to cleaning and lubrication (where applicable). Cleaning should be limited to exterior
surfaces only. Removing dust buildup on motor housing ensures proper motor cooling. Greasing of motors is only intended
when fittings are provided. Many fractional motors are permanently lubricated and should not be lubricated further. Motors
supplied with grease fittings should be greased in accordance with the manufacturer’s recommendations. Where motor
temperatures do not exceed 104ºF (40ºC), the grease should be replaced after 2000 hours of running time as a general rule.
Wheels require very little attention when moving clean air. Occasionally, oil and dust may accumulate causing imbalance.
When this occurs, the wheel and housing should be cleaned to ensure smooth and safe operation.
The unit should be made non-functional when cleaning the wheel or housing (fuses removed, disconnect locked off, etc.).
All fasteners should be checked for tightness each time maintenance checks are performed prior to restarting unit.
A proper maintenance program will help these units deliver years of dependable service.
3
TROUBLESHOOTING
NOTE: Before taking any corrective action, make certain unit is not capable of operation during repairs.
PROBLEM CAUSE CORRECTIVE ACTION
Reduced
Airflow
System resistance too high
Check system: Proper operation of
backdraft or control dampers, obstruction
in ductwork, etc.
Unit running backwards Correct as shown in Fig. 4
Excessive dirt buildup on wheels Clean wheel
Improper wheel alignment Center wheel on inlets
Excessive Noise
or Vibration
Bad bearings Replace
Belts too tight or too loose Refer to Fig. 6 and adjust tension
Loose drive or motor pulleys Align and tighten. See “Pre-Starting
Checks”
Foreign objects in wheel or housing Remove objects, check for damage or
unbalance
Unbalance of wheel caused by excessive
dirt and grease buildup Remove buildup

Warranty
Greenheck warrants this equipment to be free from defects in material and workmanship for a period of one year from the
purchase date. 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 prepaid.
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.
PARTS LIST
NOTE: Each fan bears a manufacturer’s nameplate with model number and serial number embossed. This information will
assist the local Greenheck representative and the factory in providing service and replacement parts.
WH EE L
S H A FT
S C R O LL
M O T O R
A CC E SS
P A N E L
B E L T
M O T O R
PU LL E Y
D R I V E
S UPP O R T
S H A FT
PU LL E Y
B E A R IN G
H O U S IN G
I S O L A T O R
#458341 IOM BDF FS
Rev. 4 September 2005
Copyright © 2005 Greenheck Fan Corp.
As a result of our commitment to continuous research, Greenheck reserves the right to change specifications without notice.