User Manual

ManualsBrandsTwin City ManualsFansHooded Propeller & Tubeaxial Roof Fans - IM-4860

Models: LHB, LHD, LHBF, LHDF, THB, THD, THBF, THDF

Twin City Fan & Blower Bulletins 4850 and 4860 provide additional information on this equipment. These bulletins can

be found at www.tcf.com or by contacting your local Twin City Fan & Blower sales representative.

LHB

THB

IM-4860

August 2014

Hooded Propeller

& Tubeaxial Roof Fans

INSTALLATION, OPERATION & MAINTENANCE MANUAL

Summary of content (8 pages)

PAGE 1
Hooded Propeller & Tubeaxial Roof Fans IM-4860 August 2014 INSTALLATION, OPERATION & MAINTENANCE MANUAL Models: LHB, LHD, LHBF, LHDF, THB, THD, THBF, THDF Twin City Fan & Blower Bulletins 4850 and 4860 provide additional information on this equipment. These bulletins can be found at www.tcf.com or by contacting your local Twin City Fan & Blower sales representative. LHB THB ©2014 Twin City Fan Companies, Ltd.
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Receiving, Unpacking & Inspection When the equipment is received all items should be carefully checked against the bill of lading to be sure all crates and cartons have been received. Before accepting delivery, carefully inspect each carton or crate for visible shipping damage. If any damage is noticed, the carrier should make the proper notation on the delivery receipt acknowledging the damage.
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Electrical Connection 1. Connect supply wiring to a disconnect switch. Check the wiring diagrams on the motor for connections. 2. The motor is factory set at the voltage marked on the fan nameplate. Check the line voltage with the nameplate voltage and wiring diagrams. 3. The main power wiring should be sized for the ampacity shown on the dataplate. Size wires in accordance with the ampacity tables in Article 310 of the National Electrical Code.
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Maintenance Installation and maintenance are to be performed only by qualified personnel who are familiar with local codes and regulations and experienced with this type of equipment. CAUTION: Sharp edges and screws are a potential injury hazard. Avoid them. WARNING Hazardous moving parts. Unit may contain protected fan motor which may start automatically and cause injury. Allow time for reset. Disconnect power before servicing.
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15. Filter Maintenance (Filtered Supply Fans) Inspect the 2" Aluminum Mesh Filters on a regular basis. Clogged filters can adversely affect air performance. from the hood end panels and sliding them out of the filter rails. On sizes 21-30 it is recommended to remove the 1½" bolts connecting the hood side rails to the hood mount bars on the fan housing on one side and loosen the ones on the opposite side and tilt the hood back to gain access. Wash filters with a mild detergent in warm water.
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V-Belts V-belts on these belt driven fans are oil, heat, and static resistant type and oversized for continuous duty. With proper installation and maintenance, years of operating efficiency can be added to the lifespan of the V-belt drive. The condition of V-belts and the amount of belt tension should be checked prior to start-up (see Figure 1). When it becomes necessary to adjust belt tension, do not overtension as bearing damage will occur.
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Fan Troubleshooting Chart PROBLEM POSSIBLE CAUSES FAN DOES NOT OPERATE 1. 2. 3. 4. 5. 6. Wrong voltage. Electricity turned off or not wired properly. Tripped overload protector. Blown fuses. Loose pulleys. Broken belts. TOO LITTLE AIR 1. 2. 3. 4. 5. 6. Propeller rotating in wrong direction. Fan speed lower than design. System is more restrictive (more static pressure) than expected. Restricted fan inlet or outlet. Inlet or outlet screens clogged.
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