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TCB Tubular Centrifugal Inline Fan
TCBRU Centrifugal Upblast Fan
TCBRS Centrifugal Roof Supply Fan
RECEIVING
Greenheck models TCB, TCBRU, and TCBRS are thoroughly inspected and test run at the factory. Items such as proper wheel
alignment, balance, vibration and workmanship are analyzed by quality control personnel using state-of-the art equipment.
However, damage may occur during handling and shipping. Therefore, it is important that the unit be carefully inspected for
visible and concealed damage before beginning installation. In addition, check to see that all accessory items are accounted for.
STORAGE - Indoor and Outdoor
When a fan is to be stored for a period of time, it must be protected from dirt and moisture. Use of a tarp to cover the unit will
aid in keeping it clean and dry, but avoid using a black plastic tarp as it will promote condensation. Improper storage which
results in damage to the fan will void the warranty. If the storage period is lengthy, the wheel and motor should be rotated
periodically and the bearings purged with fresh grease. In humid, dusty, or corrosive atmospheres, rotate the fan and purge the
bearings once a month. Under normal conditions, this procedure should be repeated once every three months.
TCBRU Roof Upblast
Level 1 & 2
TCB Inline
Level 1 & 2
TCBRS Roof Supply
Level 1 & 2
HANDLING
Fans are to be rigged by either the lifting
brackets provided or by the skid when a
forklift is used. All TCB Inline models have
mounting brackets located at the ends of
the fan housing with which slings can be
attached (Fig. 1). All TCBRU Roof Upblast
models can be lifted by lifting lugs located
above the motor cover of the fan (Fig. 2). All
TCBRS Roof Supply fans can be lifted by
lugs located on the hood rails (Fig. 3).
Fans should NOT be lifted by the shaft,
housing, motor, belt guard, or any
accessories.
Fig. 1
Fig. 3
Fig.2
GREENHECK
P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410
PH. 715-359-6171
®
READ AND SAVE THESE INSTRUCTIONS
PN 456557
Installation Operation and Maintenance Manual
REPORT ANY DAMAGED EQUIPMENT TO THE SHIPPER IMMEDIATELY!
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INSTALLATION
EFFECT OF INSTALLATION ON PERFORMANCE
Any installation with inlet or discharge configurations that deviate from these recommendations may result in reduced fan
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 and increased sound levels. Free discharge or turbulent flow in the discharge ductwork will
also result in system effect losses.
The most common inlet and discharge conditions which affect fan performance are:
INLET DUCT TURNS
DISCHARGE DUCT TURNS
Horizontal Base Mount
Motor at 3 or 9
o’clock position
Vertical Base Mount
w/ airflow up or down
Fan
Roof Opening
Size
A B
Depth* TCBRU TCBRS
9 171/2 26 183/8 14 x 14 16 x 16
10 171/2 26 183/8 14 x 14 16 x 16
12 171/2 26 183/8 14 x 14 16 x 16
13 19 281/2 197/8 16 x 16 18 x 18
16 213/4 33 237/8 18 x 18 22 x 22
18 261/4 37 263/8 20 x 20 28 x 28
22 301/2 44 295/8 24 x 24 34 x 34
24 35 50 331/8 26 x 26 40 x 40
30 42 56 425/8 32 x 32 46 x 46
36 463/4 62 481/8 38 x 38 52 x 52
TCBRU Installation
Curb Mounted
TCBRS Installation
Curb Mounted
TYPICAL INSTALLATIONS
Following are typical mounting installations for models TCB (horizontal or vertical mounting), TCBRU, and TCBRS. For TCB's
with motor in the 3 or 9 o'clock position or vertical installations, additional mounting rails are recommended. Mounting rail
dimensions are shown for field fabrication.
Good
Poor
Length of Straight Duct
0
0.2
0
1 Fan
Wheel
Dia.
Turning
Vanes
ROOF
CURB
CURB
CAP
Horizontal Ceiling Hung
Vertical Ceiling Hung
Mounting Hole Location
A
Optional Mounting
Rails
B
B
Optional Mounting
Rails
Installation of a duct turn or elbow too close to the fan inlet
reduces fan performance because air is loaded unevenly
into the fan wheel. To achieve full fan performance there
should be at least one to two fan wheel diameters between
the turn or elbow and the fan inlet.
Fan performance is reduced when duct turns are
made immediately off the fan discharge. To achieve
cataloged fan performance, there should be at least
one equivalent duct diameter of straight ductwork
between the fan discharge and any duct turns.
*Depth dimension is the center distance between
holes in the front and rear mounting brackets
Poor Good
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PRE-START UP CHECKS
1. Check all fasteners for tightness.
2. The wheel should be aligned as shown in Fig. 4. Although the wheel position is preset and the unit is test run at the
factory, movement may occur during shipment.
3. Wheel rotation should be in the same direction as the rotation decal affixed to the unit. For 3-phase installations, fan
rotation can be reversed by simply interchanging any two of the three electrical leads. For single phase installations,
follow the wiring diagram located on the motor.
4. Adjustable motor pulleys are preset at the factory for the specified fan RPM. Fan speed can be increased by closing or
decreased by opening the adjustable pulley. Two or three groove variable pitch pulleys must be adjusted an equal number
of turns open or closed.
Note: Any increase in fan speed represents a substantial increase in horsepower required from the
motor. Always check motor load amperage and compare to name plate rating when changing fan
speed.
ELECTRICAL CONNECTIONS
Before electrical connections are made, the supply voltage, phase and ampere capacity must be checked for compatibility
with the fan motor. In addition, the supply wiring must be properly fused and conform to local and national electrical codes.
The supply wires are then connected to an optional safety disconnect switch (if supplied) or wired directly to the motor.
MAINTENANCE
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.
Once the fan has been put into operation, a periodic maintenance program should be set up to preserve the reliability and
performance of the fan. Items to be included in this program are:
• BEARINGS • SET SCREWS
• BELTS • MOTORS
• FASTENERS • REMOVAL OF DUST/DIRT
BEARINGS
Bearings are the most critical moving part of the fan and should be inspected at periodic intervals. Locking collars and set
screws, in addition to fasteners attaching the bearing to the bearing plate, must be checked for tightness. In a clean
environment and temperature above 32°F and below 200°F, fan shaft bearings with grease fittings should be lubricated semiannually using a high quality lithium based grease. If unusual environmental conditions exist such as temperatures below 32°F
and above 200°F, moisture or contaminants, more frequent lubrication is required.
With the unit running, add grease very slowly with a manual grease gun until a slight bead of grease forms at the seal. Be careful
not to unseat the seal by over lubricating or using excessive pressure. Bearings without grease fittings are lubricated for life.
OPERATION
Wheel
Inlet Cone
Radial Gap
Fig. 4
Overlap
Direction
of Airflow
The radial gap should be consistent at all locations between
the centrifugal wheel and the inlet cone. Centering may be
accomplished by loosening the inlet cone bolts and
repositioning the inlet cone.
To obtain the optimum performance, the centrifugal wheel
must overlap the inlet cone. Adjustments can be made by
loosening the set screws in the wheel and moving the wheel
to the desired position.
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BELTS
Premature belt failures are frequently caused by improper belt tension (either too tight or
too loose) or misaligned pulleys. The proper tension for operating a V-belt is the lowest
tension at which the belts will not slip at peak load conditions. For initial tensioning, the
proper belt deflection half-way between pulley centers is 1/64" for each inch of belt span.
For example, if the belt span is 64 inches, the belt deflection should be one inch using
moderate thumb pressure at midpoint of the drive. See Fig. 5.
Check belt tension two times during the first 24 hours of operation and periodically
thereafter. To adjust belt tension, simply loosen four fasteners (two on each side of the
motor plate) and slide the motor plate away from the fan shaft until proper belt tension
is attained. On some fans, fasteners attaching the motor to the motor plate must be
loosened in order to adjust the belt.
It is very important that the drive pulleys remain in proper alignment after adjustments
are made. Misalignment of pulleys will result in premature belt wear, noise, vibration and
power loss. See Fig. 6.
PARTS LIST
Each fan bears a
manufacturer's nameplate
with model number and serial
number embossed. This
information in addition to the
parts list shown will assist the
local Greenheck
representative and the factory
in providing service and
replacement parts.
Belt Span
Deflection =
Belt Span
64
Fig. 5
Fig. 6
FASTENERS AND SET SCREWS
A periodic inspection should include checking all fasteners and set screws for tightness. Particular attention should be paid to
set screws attaching the propeller to the shaft and the shaft to the bearings. Loose bearing set screws will lead to premature
failure of the fan shaft.
MOTORS
Many fractional horsepower motors installed on the smaller fans are lubricated for life and require no further attention. Motors
supplied with grease fittings should be greased according to directions printed on the motor.
REMOVAL OF DUST AND DIRT
Dirt clogs cooling openings on the motor housing, contaminates bearing lubricant, and collects on the impeller causing severe
imbalance if left unchecked. The exterior surface of the motor and impeller should be thoroughly cleaned periodically. Use
caution and do not allow water or solvents to enter the motor or bearings. Under no circumstances should motors or bearings
be sprayed with steam or water.
DAMPER INSPECTION AND SERVICE (Model TCBRU Level 1 or 2 )
Butterfly dampers should be inspected for proper operation at each service interval. Check for freedom of movement and
general condition of the damper blades and hinge rods.
Motor
Motor
Pulley
Belt
Belt
Tube
Shaft
Pulley
Bearing
Cover
Bearings
Shaft
Inlet
Cone
(Venturi)
Wheel
Motor
Plate
Motor
Cover
(Optional)
Bearing
Support
Mounting
Brackets
(Qty. of 4)
IOM TCB-1-97
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 repaired 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.
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