Greenheck Fan NYB, NYD manual Troubleshooting, Recommended Relubrication Frequency in Months

Page 6

Recommended Relubrication Frequency in Months

NOTE: If unusual environment conditions exist more frequent lubrication is required (extreme temperature, moisture or contaminants).

A good quality lithium base grease, conforming to NLGI Grade 2 consistency, such as those listed here may be used.

Table 2: Suggested Fan Bearing Greasing Intervals

Interval

Type of Service

(months)

 

 

 

 

Heavy duty in dirty, dusty locations; high ambient

1 to 3

temperatures; moisture laden atmosphere;

 

vibration.

 

 

3 to 6

12 to 24 hours per day, heavy duty, or if moisture

is present

 

 

 

6 to 12

8 to 16 hours per day in clean, relatively dry

atmosphere

 

 

 

12 to 18

Infrequent operation or light duty in clean

atmosphere

 

 

 

Table 3: Grease Manufacturers

Manufacturer

Grease (NLGI #2)

 

 

U.S. Electric Motors

Grease No. 83343

 

 

Chevron U.S.A. Inc

Chevron SRI Grease #2

 

 

Mobil Oil Corporation

Mobilith

 

Mobil 532

 

 

 

Texaco, Inc.

Premium BRB #2

 

Texaco Multifak #2

 

 

 

Amoco Oil Co.

Rykon Premium #2

 

 

Exxon

Unirex N2

 

 

Shell

B Shell Alvania #2

 

 

Troubleshooting

WARNING: Before taking any corrective action, make certain unit is not capable of operation during repairs.

PROBLEM

CAUSE

CORRECTIVE ACTION

 

 

 

 

Bad Bearings

Replace.

 

 

 

 

Wheel unbalance

Clean and remove all dirt buildup off wheel. Check wheel

 

balance, rebalance in place if necessary.

 

 

 

 

 

Excessive Noise

Belts too tight or too loose

Adjust tension, see figure 7.

Wheel improperly aligned and

 

or Vibration

Center wheel on inlet, see figure 2.

rubbing

 

 

 

 

 

 

Loose drive or motor pulleys

Align and tighten. See “Pre-Starting Checks”, see page 3-4.

 

 

 

 

Foreign objects in wheel or

Remove objects, check for damage or unbalance.

 

housing

 

 

 

 

 

 

System resistance too high

Check system: Proper operation of backdraft or control

 

dampers, obstruction in ductwork, etc.

 

 

 

 

 

Reduced airflow

Unit running backwards

Correct as shown in figure 3.

 

Excessive dirt buildup on wheels

Clean wheel.

 

 

 

 

Improper wheel alignment

Center wheel on inlets, see Pre-Starting checks and figure 2.

 

 

 

6

Models NYD & NYB • Tamper-Resistant Centrifugal Roof Exhaust Fans

®

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Contents General Safety Information Model NYD & NYBHandling ReceivingUnpacking StorageRemoving From Storage Inspection and Maintenance During StorageWheel Overlap Dimensions Pre-Starting ChecksModel NYB Pre-Starting Belt Tension Checks Operation NYD/NYBInspection NYD/NYB Maintenance NYD/NYB Belt/Bearing Maintenance NYB UnitTroubleshooting Recommended Relubrication Frequency in MonthsParts List NYB Belt Drive Centrifugal Roof Exhaust FanWarranty NYD Direct Drive Centrifugal Roof Exhaust Fan
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NYD, NYB specifications

Greenheck Fan has long been known as a leader in the HVAC industry, with a commitment to providing innovative solutions for various ventilation needs. Among their impressive lineup, the NYB and NYD series stand out, showcasing advanced engineering, energy efficiency, and robust performance.

The Greenheck NYB and NYD fans are designed specifically for commercial and industrial applications, focusing on building ventilation demands. The NYB series features belt-driven centrifugal fans, while the NYD series brings direct-drive technology to the table. This versatility allows these fans to accommodate a wide range of air handling applications, from exhaust to supply air scenarios.

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In summary, the Greenheck Fan NYB and NYD series represent cutting-edge options for any commercial or industrial ventilation system. Their combination of energy efficiency, advanced technologies, durability, and customization makes them a go-to choice for professionals seeking reliable and effective air management solutions.
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