Troubleshooting

Breezeway (Belt Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• If fan is ducted, check duct system for obstructions. Check duct access doors; be sure they are closed.
• If wall shutter is installed, is it operating freely? If wall shutter is motorized is motor opening shutter?
• If motor is two speed, be sure fan is set for the correct speed.
• Check fan speed with tachometer to be sure motor pulley is set for specified rpm. Reset variable pitch motor pulley if necessary.
• Verify motor was wired for the correct voltage; many motors are dual voltage.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor speed with tachometer. Motor should run +/- 3% of motor name plate RPM. If motor is running slow, check wiring connections to motor and verify they were made according to motor wiring diagram. Check voltage of lines going into motor. Line voltage should be +/- 10% of rated voltage. If motor still running slow, replace motor.

Wrong Air Direction

Consult PennBarry's Engineering Department; include the air balance report and duct layout schematic in correspondence.

Noise - Vibration / Shaking

• Be sure the fan is secured in wall opening. Check hardware and tighten if necessary.
• Check V belt for wear. Replace if necessary. Excessive belt wear will cause fan vibration.
• Check belt tension. Most belts will stretch during their initial operation and should be re-tightened after first 40 hours of fan operation. Refer to the fan operating and maintenance instructions for belt tensioning procedure.
• Check alignment between motor pulley and driven pulley.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearing or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not, the motor is defective and should be replaced.

Noise - Metal to Metal or Grinding

• Check propeller to be sure it is not rubbing against fan inlet. Re-align propeller if necessary.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not, the motor is defective and should be replaced.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearing or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative for corrective action recommendations.

Motor - Overheating / Burn-Out

• Verify motor was wired for the correct voltage; many motors are dual voltage.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check fan rpm. Slow down by adjusting variable pitch motor pulley.
• Was additional equipment added to the system after initial fan installation, e.g. filters or dampers? These items will increase system static pressure. On axial fans, motor load increases with static pressure.
• Check incoming power line voltage, it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, an electrician needs to investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative; include original fan design criteria CFM and SP in correspondence.

Breezeway (Direct Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• If fan is ducted, check duct system for obstructions. Check duct access doors; be sure they are closed.
• If wall shutter is installed, is it operating freely? If wall shutter is motorized, is the motor opening shutter?
• If the fan has speed control, check setting.
• If the motor is two speed, be sure the fan is set for the correct speed.
• Verify the motor is wired for the correct voltage; many motors are dual voltage.
• Check propeller rotation. Correct rotation is CCW looking from back end of the motor. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• If possible, check motor speed with strobe tachometer. Do not attempt to use a hand held tachometer on motor with propeller connected to it. Motor should run +/- 3% of motor name plate RPM. If the motor is running slow, check wiring connections to the motor and verify they were made according to the motor wiring diagram. Check the voltage of line going into motor. Line voltage should be +/- 10% of rated voltage. If the motor is still running slow, replace the motor.

Wrong Air Direction

Consult PennBarry's Engineering Department; include the air balance report and duct layout schematic.

Noise - Vibration / Shaking

• Be sure fan is secured in wall opening. Check hardware and tighten if necessary.
• Check the propeller rotation. Correct rotation is CCW looking from back end of the motor. If the motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If it is a three phase motor, interchange two power line connections to reverse rotation.

Noise - Metal to Metal or Grinding

Check the propeller to be sure it is not rubbing against the fan inlet. Re-align the propeller if necessary. If noise problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative for corrective action recommendations.

Motor - Overheating / Burn-Out

• Check propeller rotation. Correct rotation is CCW looking from back end of the motor. If the motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If it is a three phase motor, interchange two power line connections to reverse rotation.
• Verify the motor is wired for the correct voltage; many motors are dual voltage.
• Check the motor amp draw. If the motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If the motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If the motor is over amping, check the motor wiring and propeller rotation as described above.
• Was additional equipment added to the system after initial fan installation, e.g. filters or dampers? These items will increase system static pressure. On axial fans, motor load increases with static pressure.
• Check incoming power line voltage. It should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, an electrician needs to investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the original fan design criteria CFM and SP in correspondence.

Centrex REX, REXJR, and SX (Belt Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• Check duct system for obstructions. Check duct access doors; be sure they are closed.
• If dampers are installed in system, are they operating properly?
• If motor is two speed, be sure fan is set for the correct speed.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Remove access door; using strobe tachometer, check fan speed.
• Reset variable pitch motor pulley to adjust fan speed if necessary.
• Check wheel rotation. If wheel is not visible, look at fan shaft.
• Correct wheel / shaft rotation is CCW standing at the outlet side of fan. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor speed with tachometer. Motor should run +/- 3% of motor name plate RPM. If motor is running slow, check wiring connections to motor and verify they were made according to motor wiring diagram. Check voltage of lines going into motor. Line voltage should be +/- 10% of rated voltage. If motor still running slow, replace motor.
• If after above items are checked and fan performance is still low, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the air balance report and duct layout schematic in correspondence.

Noise - Vibration / Shaking

• Check hardware and tighten if necessary.
• If unit is suspended, it should be hung with vibration isolators.
• Check alignment between motor pulley and driven pulley.
• Check V belt for wear. Replace if necessary. Excessive belt wear will cause fan vibration.
• Check belt tension. Most belts will stretch during their initial operation and should be re-tightened after first 40 hours of fan operation. Refer to the fan operating and maintenance instructions for belt tensioning procedure.
• Check wheel rotation. If wheel is not visible, look at fan shaft. Correct wheel / shaft rotation is CCW standing at the outlet side of fan. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearings or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not, motor is defective and should be replaced. If motor runs smooth, the wheel may be out of balance and need to be replaced.

Noise - Metal to Metal or Grinding

• Check wheel to inlet alignment. If wheel is rubbing inlet on the SXBC, loosen inlet hardware and realign inlet to wheel. On the REXB, there should be a 1/4" to 3/8" clearance between the wheel and inlet. Realign wheel if needed.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not motor is defective and should be replaced.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearings or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative for corrective action recommendations.

Motor - Overheating / Burn-Out

• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check wheel rotation. If wheel is not visible, look at fan shaft. Correct wheel / shaft rotation is CCW standing at the outlet side of fan. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check fan rpm. Slow down by adjusting variable pitch motor pulley.
• Check incoming power line voltage, it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, customer should have an electrician investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the original design criteria CFM and SP in correspondence.

Centrex REX, REXJR, and SX (Direct Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• Check duct system for obstructions. Check duct access doors and be sure they are closed.
• If fan has speed control, check setting. Using speed control, does fan wheel turn when control is turned all the way down? Turn speed control trim screw CCW until wheel begins to turn.
• If dampers are installed in system, are they operating properly?
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check wheel rotation. Correct rotation is CCW standing at the outlet side of fan. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• If after above items are checked and fan performance is still low, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the air balance report and duct layout schematic in correspondence.

Noise - Vibration / Shaking

• Check hardware and tighten if necessary.
• If unit is suspended, it should be hung with vibration isolators.
• Check wheel rotation. Correct rotation is CCW standing at the outlet side of fan. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Remove wheel from motor shaft and power up motor, does it run smoothly? If not motor is defective and should be replaced. If motor runs smooth, the wheel may be out of balance and need to be replaced.
• Be sure access doors are securely fastened to fan.

Noise - Metal to Metal or Grinding

• Check wheel to inlet alignment, realign motor / wheel if needed.
• Remove wheel from motor shaft and power up motor, does it run smoothly? If not motor is defective and should be replaced.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative for corrective action recommendations.

Motor - Overheating / Burn-Out

• Check wheel rotation. Correct rotation is CCW standing at the outlet side of fan. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check motor wiring and wheel rotation as described above.
• Check incoming power line voltage, it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, an electrician needs to investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the original design criteria CFM and SP in correspondence.

Dynamo (Belt Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• Check duct system for obstructions. Check duct access doors and be sure they are closed.
• If dampers are installed in system, are they operating properly?
• If motor is two speed, be sure fan is set for correct speed.
• Verify motor is wired for correct voltage; many motors are dual voltage.
• Check fan speed with tachometer to be sure motor pulley is set for specified rpm. Reset variable pitch motor pulley, if necessary.
• Check wheel rotation. If wheel is not visible, look at fan shaft. Dynamo can be made either CW or CCW rotation. Check fan housing for directional arrow and verify wheel / fan shaft rotation. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor speed with tachometer. Motor should run +/- 3% of motor name plate RPM. If motor is running slow, check wiring connection to motor and verify they were made according to motor wiring diagram. Check voltage of lines going into motor. Line voltage should be +/- 10% of rated voltage. If motor still running slow, replace motor.
• If after above items are checked and fan performance is still low, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the air balance report and duct layout schematic in correspondence.

Noise - Vibration / Shaking

• Check mounting hardware and tighten if necessary.
• Check V belt for wear. Replace if necessary. Excessive belt wear will cause fan vibration.
• Check belt tension. Most belts will stretch during their initial operation and should be re-tightened after first 40 hours of fan operation. Refer to the fan operating and maintenance instructions for belt tensioning procedure.
• Check alignment between motor pulley and driven pulley.
• Check wheel rotation. If wheel is not visible, look at fan shaft. Dynamo can be made either CW or CCW rotation. Check fan housing for directional arrow and verify wheel / fan shaft rotation. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearing or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not motor is defective and should be replaced. If motor runs smooth, the wheel may be out of balance and need to be replaced.

Noise - Metal to Metal or Grinding

• Check wheel to inlet alignment. If wheel is rubbing inlet, loosen inlet hardware and realign inlet to wheel.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not, motor is defective and should be replaced.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearing or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative for corrective action recommendations.

Motor - Overheating / Burn-Out

• Verify motor is wired for correct voltage; many motors are dual voltage
• Check wheel rotation. If wheel is not visible, look at fan shaft. Dynamo can be made either CW or CCW rotation. Check fan housing for directional arrow and verify wheel / fan shaft rotation. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check fan rpm. Slow down by adjusting variable pitch motor pulley.
• Check incoming power line voltage, it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, an electrician needs to investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the original design criteria CFM and SP in correspondence.

Domex and Fumex (Belt Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• Check duct system for obstructions. Check duct access doors and be sure they are closed.
• If damper is installed, is it operating freely? If damper is motorized, is motor opening damper?
• If filters are installed in system, replace with clean filters. Re-check airflow.
• If motor is two speed, be sure fan is set for the correct speed.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check fan speed with tachometer to be sure motor pulley is set for specified rpm. Reset variable pitch motor pulley if necessary.
• Check wheel rotation. If wheel is not visible, look at fan shaft. Correct wheel / shaft rotation is CCW looking down at fan top plate. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor speed with tachometer. Motor should run +/- 3% of motor name plate RPM. If motor is running slow, check wiring connections to motor and verify they were made according to motor wiring diagram. Check voltage of lines going into motor. Line voltage should be +/- 10% of rated voltage. If motor is still running slow, replace motor.
• If after above items are checked and fan performance is still low, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the air balance report and duct layout schematic in correspondence.

Noise - Vibration / Shaking

• Check hardware, particularly motor dome nuts; tighten if necessary. Be sure fan is secured to roof curb. Check alignment between motor pulley and driven pulley.
• Check V belt for wear. Replace if necessary. Excessive belt wear will cause fan vibration.
• Check belt tension. Most belts will stretch during their initial operation and should be re-tightened after first 40 hours of fan operation. Refer to the fan operating and maintenance instructions for belt tensioning procedure.
• Check wheel rotation. If wheel is not visible, look at fan shaft. Correct wheel / shaft rotation is CCW looking down at fan top plate. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearings or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not, motor is defective and should be replaced. If motor runs smooth, the wheel may be out of balance and need to be replaced.

Noise - Metal to Metal or Grinding

• Check wheel to inlet alignment. If wheel is rubbing inlet, realign wheel. Refer to fan operation and maintenance instructions for wheel alignment procedure.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not motor is defective and should be replaced.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearings or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative for corrective action recommendations.

Motor - Overheating / Burn-Out

• Check wheel rotation. If wheel is not visible, look at fan shaft. Correct wheel / shaft rotation is CCW looking down at fan top plate. If motor rotation needs to be changed, for single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Verify motor is wired for the correct voltage; many motors are dual voltage
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check fan rpm. Slow down by adjusting variable pitch motor pulley.
• Check incoming power line voltage, it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, customer should have an electrician investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the original design criteria CFM and SP in correspondence.

Domex and Fumex (Direct Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• Check duct system for obstructions. Check duct access doors and be sure they are closed.
• If fan has speed control, check setting.
• Using speed control, does fan wheel turn when control is turned all the way down? Turn speed control trim screw CCW until heel begins to turn.
• If damper is installed, is it operating freely? If damper is motorized, is motor opening damper?
• If filters are installed in system, replace with clean filters. Re-check air flow.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check wheel rotation. Correct rotation is CCW looking down at fan top plate. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• If after above items are checked and fan performance is still low, contact your local PennBarry Representative or PennBarry Customer Service Representative; include the air balance report and duct layout schematic in correspondence.

Noise - Humming

• Some larger horse power units, when used with a speed control, may develop a humming sound when motor speed is reduced; particularly the FMX14Q, AT20, AT24, AQ35, BT45, BT53, WAQ35 and WBT53.
• If noise is objectionable, rubber isolators, part #63024-0 can be mounted to motor. A welded fan wheel should also be installed.

Noise - Vibration / Shaking

• Check hardware, particularly motor dome nuts. Tighten if necessary. Be sure fan is secured to roof curb.
• Check wheel rotation. Correct rotation is CCW looking down at fan top plate. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.

Noise - Metal to Metal or Grinding

• Check wheel to inlet alignment, realign motor / wheel if needed.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative for corrective action recommendations.

Motor - Overheating / Burn-Out

• Check wheel rotation. Correct rotation is CCW looking down at fan top plate. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check motor wiring and wheel rotation as described above.
• Check incoming power line voltage, it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, an electrician needs to investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative. (Include the original design criteria CFM and SP in correspondance.)

Hi-Ex (Belt Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• If fan is ducted, check duct system for obstructions. Check duct access doors; be sure they are closed.
• If damper is installed in roof opening, is it operating freely? If damper is motorized is motor opening damper?
• If motor is two speed, be sure fan is set for the correct speed.
• Check fan speed with tachometer to be sure motor pulley is set for specified rpm. Reset variable pitch motor pulley if necessary.
• Verify motor was wired for the correct voltage; many motors are dual voltage.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor speed with tachometer. Motor should run +/- 3% of motor name plate RPM. If motor is running slow, check wiring connections to motor and verify they were made according to motor wiring diagram. Check voltage of lines going into motor.
• Line voltage should be +/- 10% of rated voltage. If motor still running slow, replace motor.
• If after above items are checked, fan performance is still low, contact your local PennBarry Representative or PennBarry Customer service Representative. (Include the air balance report and duct layout schematic in correspondance.)

Noise - Vibration / Shaking

• Be sure fan is secured to roof curb. Check hardware and tighten if necessary.
• Check alignment between motor pulley and driven pulley.
• Check V belt for wear. Replace if necessary. Excessive belt wear will cause fan vibration.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearings or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearings, if bearing seal shows signs of damage, both bearings should be replaced.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not, the motor is defective and should be replaced.

Noise - Metal to Metal or Grinding

• Check propeller to be sure it is not rubbing against fan housing.
• Re-align propeller if necessary.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not, the motor is defective and should be replaced.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearings or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearings, if bearing seal shows signs of damage, both bearings should be replaced.

Motor - Overheating / Burn-Out

• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check fan rpm. Slow down by adjusting variable pitch motor pulley.
• Check incoming power line voltage, it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, customer should have an electrician investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer service Representative. (Include the original fan design criteria CFM and SP in correspondance.)

Butterfly Dampers

• If dampers are flapping in high wind, install magnetic latches on dampers.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer service Representative for corrective action recommendations.

Hi-Ex (Direct Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• If fan is ducted, check duct system for obstructions. Check duct access doors and be sure they are closed.
• If damper is installed in roof opening, is it operating freely? If damper is motorized is motor opening damper?
• If motor is two speed, be sure fan is set for the correct speed.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• If possible, check motor speed with strobe tachometer. Do not attempt to use a hand tachometer on motor with propeller connected to it. Motor should run +/- 3% of motor name plate RPM. If motor is running slow, check wiring connections to motor and verify they were made according to motor wiring diagram. Check voltage of lines going into motor. Line voltage should be +/- 10% of rated voltage. If motor still running slow, replace motor.
• If after above items are checked and fan performance is still low, contact your local PennBarry Representative or PennBarry Customer service Representative. (Include the air balance report and duct layout schematic in correspondance.)

Noise - Vibration / Shaking

• Be sure fan is secured to roof curb. Check hardware and tighten if necessary.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.

Noise - Metal to Metal or Grinding

• Check propeller to be sure it is not rubbing against fan housing.
• Re-align propeller if necessary.

Motor - Overheating / Burn-Out

• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, single phase motor, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check fan rpm. Slow down by adjusting variable pitch motor pulley.
• Check incoming power line voltage; it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, customer should have an electrician investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer service Representative. (Include the original fan design criteria CFM and SP in correspondance.)

Butterfly Dampers

• If dampers are flapping in high wind, install magnetic latches on dampers.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer service Representative for corrective action recommendations.

Powered Airette and Domex Axial (Belt Drive)

Freight Damage

Contact your local PennBarry Representative.

Low Air Performance

• If fan is ducted, check duct system for obstructions. Check duct access doors and be sure they are closed.
• If damper is installed, is it operating freely? If damper is motorized, is motor opening damper?
• If motor is two speed, be sure fan is set for the correct speed.
• Check fan speed with tachometer to be sure motor pulley is set for specified rpm. Reset variable pitch motor pulley if necessary.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check motor speed with a tachometer. Motor should run +/- 3% of motor name plate RPM. If motor is running slow, check wiring connections to motor and verify they were made according to motor wiring diagram. Check voltage of lines going into motor. Line voltage should be +/- 10% of rated voltage. If motor still running slow, replace motor.

Wrong Air Direction

• If fan was ordered as a supply air fan but made as an exhaust air fan, or vice versa, flip the propeller over. Propeller bushing should always be facing down into roof opening.
• If exhaust AEP unit is made to supply air, hood may have to be re-sized to allow desired airflow.
• If after above items are checked and fan performance is still low, contact your local PennBarry Representative or PennBarry Customer Service Representative. (Include the air balance report and duct layout schematic in correspondance.)

Noise - Vibration / Shaking

• Be sure fan is secured to roof curb. Check hardware and tighten if necessary.
• Check V belt for wear. Replace if necessary. Excessive belt wear will cause fan vibration.
• Check belt tension. Most belts will stretch during their initial operation and should be re-tightened after first 40 hours of fan operation. Refer to fan operating and maintenance instructions for belt tensioning procedure.
• Check alignment between motor pulley and driven pulley.
• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearing or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• Remove belt from motor pulley and power up motor; does it run smoothly? If not, the motor is defective and should be replaced.

Noise - Metal to Metal or Grinding

• Check propeller to be sure it is not rubbing against fan inlet. Re-align propeller if necessary.
• Remove belt from motor pulley and power up motor, does it run smoothly? If not motor is defective and should be replaced.
• Check fan shaft and bearings for wear. If fan shaft is scored or grooved around the bearing or driven pulley, it should be replaced. If bearing collar is cracked or discolored, if excessive grease is present on bearing, if bearing seal shows signs of damage, both bearings should be replaced.
• If noise problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative for corrective action recommendations.

Motor - Overheating / Burn-Out

• Check propeller rotation. Correct rotation is CCW looking from drive side of fan. If motor rotation needs to be changed, for single phase, follow directions on motor name plate to reverse rotation. If three phase motor, interchange two power line connections to reverse rotation.
• Verify motor is wired for the correct voltage; many motors are dual voltage.
• Check motor amp draw. If motor has a service factor, amp draw cannot exceed service factor amps (usually shown on motor name plate). If motor has no service factor, e.g. explosion proof and some totally enclosed motors, amp draw cannot exceed full load amps shown on motor name plate. If motor is over amping, check fan rpm. Slow down by adjusting variable pitch motor pulley.
• Was additional equipment added to the system after initial fan installation, e.g. filters or dampers? These items will increase system static pressure. On axial fans, motor load increases with static pressure.
• Check incoming power line voltage, it should be within +/- 10% of rated voltage, e.g. 120 volt line should read between 108 - 132 volts. If actual line voltage is out of tolerance range, an electrician needs to investigate why.
• If motor problems persist, contact your local PennBarry Representative or PennBarry Customer Service Representative. (Include the original fan design criteria CFM and SP in correspondance.)