Greenheck Fan RBU user manual

Summary of the content on the page No. 1

PN 455700
READ AND SAVE THESE INSTRUCTIONS
Models RBU/RBUMO/RDU
GREENHECK
Upblast Propeller Roof Fans
P.O. BOX 410 SCHOFIELD, WISCONSIN 54476-0410
PH. 715-359-6171
®
www.greenheck.com
Belt Drive and Direct Drive
Installation, Operation and Maintenance Manual
Greenheck Model RBU, RBUMO and RDU fans are thoroughly inspected and test run at
the factory, however damage may occur during handling and shipping. Consequently, it
is important that the unit be carefully inspected for visible and conceale

Summary of the content on the page No. 2

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. For belt drive units in Emergency Smoke Removal installations, the electrical supply must be kept out of the

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PRESTARTING CHECKS Check all fasteners and set screws for tightness. This is especially important for bearing set screws. The propeller should rotate freely and not rub on the fan panel venturi. Rotation direction of the propeller should be checked by momentarily turning the unit on. Rotation should be in the same direction as the rotation decal affixed to the unit or as shown in Fig. 4. For 3-phase installations, fan rotation can be reversed by simply interchanging any two of the three electri

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FASTENERS AND SET SCREWS Any fan vibration has a tendency to loosen mechanical fasteners. 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. LUBRICATION Refer to the paragraph on bearings for bearing lubrication. Many fractional horsepower motors installed on the small