Greenheck TCB/TCBRU/TCBRS (456557) - Manual (Page 4)

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.