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Bulletin 60-March 19

2009

FRP Centrifugal Dome

d Blower

INSTALLATION, OPERATION, AND MAINTENANCE MANUAL

RKW FRP FANS

The M.K. Plastics catalog on the above corrosion resistant FRP fan, provides additional information describing the equipment,

fan performance, available accessories, and specifications.

For additional safety information, refer to AMCA publication 410-96, Safety Practices for Users and Installers of Industrial and

Commercial Fans.

For Information on special fan application requirements, contact M.K. Plastic’s corporate o ffice at (514) 871-9999.

Receiving and Inspection

Carefully inspect the fan and accessories for any damage a nd shortage immediately upon receipt of the fan.

 Turn the wheel by hand to ensure it turns freely and does not bind.

 Inspect the dampers (if supplied) for free operation of all movin g parts.

 Record on the Delivery Rec eipt any visible sign of damage.

WARNING

This unit has rotating parts. Safety precautions

should be exercised at all times during installation,

operation, and maintenance.

ALWAYS

disconnect power prior to working on fan.

Fig. 1 – The RKW Fan

Summary of content (9 pages)

PAGE 1
Bulletin 60-March 19th 2009 FRP Centrifugal Domed Blower INSTALLATION, OPERATION, AND MAINTENANCE MANUAL RKW FRP FANS The M.K. Plastics catalog on the above corrosion resistant FRP fan, provides additional information describing the equipment, fan performance, available accessories, and specifications. For additional safety information, refer to AMCA publication 410-96, Safety Practices for Users and Installers of Industrial and Commercial Fans.
PAGE 2
Storage If the fan is stored for any length of time prior to installation, completely coat the bearings, (if the fan has pillow-block bearings), with grease or moisture inhibiting oil (refer to Lubricants on page 8). Rotate the wheel several revolutions every three to five days to keep a coating of grease on all internal bearing parts. Outdoor Storage To maintain good working condition of the fan when it is stored outdoors, follow the additional instructions below. 1. 2. 3.
PAGE 3
Roof Curb Attachment Please refer to Fig. 2. To attach an assembled fan onto a roof curb, do the following – 1. Remove the weather cover; it is attached to the motor plate with self-tapping screws. 2. Unbolt and remove the motor plate, complete with the motor/flange-bearing and wheel assembly. 3. If a shutter or damper is to be installed, then insert inside the roof curb, or attach to the underside of the fan base, depending on the type used. 4. Position the fan base section on top of the roof curb.
PAGE 4
Belt and Pulley Installation Belt tension is determined by the sound the belts make when the fan is first started. Belts will produce a loud squeal, which dissipates after the fan is operating at full capacity. If the belt tension is too tight or too loose, lost efficiency and possible damage can occur. Do not change the pulley pitch diameter to change tension. This will result in a different fan speed than desired. 1. 2. 3. 4.
PAGE 5
All wiring should be in accordance with local ordinances and the National Electrical Code, NFPA 70. Ensure the power supply (voltage, frequency, and current carrying capacity of wires) are in accordance with the motor nameplate. Lock off all power sources before unit is wired to power source. Leave enough slack in the wiring to allow for motor movement when adjusting belt tension. Some fractional motors have to be removed in order to make the connection with the terminal box at the end of the motor.
PAGE 6
Final Installation Steps 1. 2. 3. Inspect fasteners and setscrews, particularly fan mounting and bearing fasteners, and tighten according to the recommended torque shown in the table Recommended Torque for Setscrews/Bolts. Inspect for correct voltage with voltmeter. Ensure all accessories are installed. Recommended Torque for Setscrews/Bolts (IN/LB) Operation Pre-Start Checks 1. Lock out all the primary and secondary power sources. 2.
PAGE 7
Establish a schedule for inspecting all parts of the fan. The frequency of inspection depends on the operating conditions and location of the fan. Inspect fans exhausting corrosive or contaminated air within the first month of operation. Fans exhausting contaminated air (airborne particles) should be inspected every three months, or sooner. Regular inspections are recommended for fans exhausting non-contaminated air. It is recommended the following inspection be conducted twice per year.
PAGE 8
1. 2. 3. 4. 5. 6. 7. 8. Remove pulleys from their respective shafts. Clean the motor and fan shafts. Clean bores of pulleys and coat the bores with heavy oil. Remove grease, rust, or burns from the pulleys and shafts. Remove burrs from the shaft by sanding. Place fan pulley on the fan shaft and motor pulley on its shaft. Damage to the pulleys can occur when excessive force is used in placing the pulleys on their respective shafts. Tighten in place.
PAGE 9
Troubleshooting Problem and Potential Cause Low Capacity or Pressure  Incorrect direction of rotation. Make sure the fan rotates in same direction as the arrows on the motor or drive belt assembly.  Poor fan inlet conditions. There should be a straight clear duct at the inlet.  Improper wheel alignment. Excessive Vibration and Noise  Damaged or unbalanced wheel.  Belts too loose; worn or oily belts.  Speed too high.  Incorrect direction of rotation.