Greenheck Fan 470656 manual Maintenance Routine, Belt Drives, Snow Accumulation, Wheels, Bearings

Page 58

Maintenance - Routine

Caution

Lock-out the gas and the electrical power to the unit before performing any maintenance or service operations to this unit.

V-Belt Drives

V-belt drives must be checked on a regular basis for wear, tension, alignment, and dirt accumulation.

Check the tension by measuring the deflection in the belt as shown below.

Check the alignment by using a straight edge across both sheaves as shown below.

important

Premature or frequent belt failures can be caused by improper belt tension, or misaligned sheaves.

•Abnormally high belt tension or drive misalignment will cause excessive bearing loads and may result in failure of the fan and/or motor bearings.

•Abnormally low belt tension will cause squealing on start-up, excessive belt flutter, slippage, and overheated sheaves.

important

Do not pry belts on or off the sheave. Loosen belt tension until belts can be removed by simply lifting the belts off the sheaves.

important

When replacing V-belts on multiple groove drives, all belts should be changed to provide uniform drive loading.

important

Do not install new belts on worn sheaves. If the sheaves have grooves worn in them, they must be replaced before new belts are installed.

Deflection = Belt Span 64

Belt Span

Belt Tension

Drive Alignment

Snow Accumulation

Clear snow away from roof mounted units. Keep the snow clear of the intake and access doors.

58Model IG / IGX Make-Up Air

Wheels

Wheels require little attention when moving clean air. Occasionally oil and dust may accumulate on the wheel causing imbalance. When this occurs the wheel and housing should be cleaned to assure proper operation.

Bearings

The bearings for our fans are carefully selected to match the maximum load and operating conditions of the specific class, arrangement and fan size. The instructions provided in this manual and those provided by the bearing manufacturer will minimize any bearing problems.

IMPORTANT

Lubricate bearings prior to periods of extended shutdowns or storage and rotate shaft monthly to aid in corrosion prevention. If the fan is stored more than three months, purge the bearings with new grease prior to start-up.

Recommended Bearing Lubrication Schedule

(in months*)

Fan

 

Bearing Bore Size (inches)

 

RPM

1⁄2 - 1

11⁄8 - 11⁄2

15⁄8 - 17⁄8

115⁄16 - 23⁄16

27⁄16 - 3

250

6

6

6

6

6

 

 

 

 

 

 

500

6

6

6

5

4

 

 

 

 

 

 

750

6

5

4

3

3

 

 

 

 

 

 

1000

5

3

2

1

1

 

 

 

 

 

 

1250

5

3

2

1

1

 

 

 

 

 

 

1500

5

2

1

1

0.5

 

 

 

 

 

 

2000

5

1

1

0.5

0.25

 

 

 

 

 

 

*Suggested initial greasing interval is based on 12 hour per day operation and 150°F maximum housing temperature. For continuous (24 hour) operation, decrease greasing interval by 50%

•If extended grease lines are present, relubricate while in operation, only without endangering personnel.

•For ball bearings (operating) relubricate until clean grease is seen purging at the seals. Be sure not to unseat the seal by over lubricating.

•For ball bearings (idle) add 1-2 shots of grease up to 2 inch bore size, and 4-5 shots above 2 inch bore sizes with a hand grease gun.

•For roller bearings add 4 shots of grease up to 2 inch bore size, and 8 shots for 2-5 inch bore size with a hand grease gun.

•Adjust relubrication frequency based on condition of purged grease.

•A high quality lithium based grease conforming to NLGI

Grade 2 consistency, such as those listed here:

Mobil 532

Texaco Multifak #2

B Shell Alavania #2

Mobilux #2

Texaco Premium #2

Exxon Unirex #2

®

Page 57 Page 59
Image 58
Page 57 Page 59
Contents Installation, Operation and Maintenance Manual General Safety InformationHandling Inspection and Maintenance during StorageReceiving StorageTable of Contents Clearance to Combustibles / Service ClearancesInstallation of Indoor Unit Installation of Arrangement DB / HZInstall Curb/Equipment Supports Installation of Roof Mounted Unit Arrangement DBCInstall Combination Curb Adaptor Assemble and Attach WeatherhoodInstall Exhaust Options Install Exhaust FanInstall Supply Unit Installation of Evaporative Cooling Module optional Installation of Venting for Outdoor UnitsStandard Indoor Venting Installation of Venting for Indoor UnitsVenting Methods Separated Combustion Concentric VentingInstalling Exhaust Vent Pipe Installation of Standard Indoor VentingVent Pipe Diameter Installation of Concentric Venting General Concentric Venting HorizontalConcentric Venting Vertical Intake END Installation of Two Pipe Venting Horizontal Seal Wall OpeningsInstallation of Two Pipe Venting Vertical Seal Roof PenetrationInstallation Electrical Wiring Install Discharge Air Sensor optional Wire the Evaporative Cooler optionalInstall Economizer Sensors optional Install DDC Interface OptionalDetermine the Supply Gas Requirements Installation of Gas PipingInstall Additional Regulator if Required Connect the Supply Gas LineInstall the Drain Line Installation Evaporative Cooler Piping optionalInstall the Water Supply Line Check/Adjust Water LevelInstall Normally Open Drain Line/ Solenoid Installation of Water WizardTM optionalInstall Normally Closed Supply Line/ Solenoid Water Wizard Valves When provided by manufacturerWire the Solenoids Installation of Water WizardInstallation Direct Expansion DX Coil Piping optional Wire the Temperature SensorCheck Coil Piping for Leaks Install Suction LineMount the Remote Sensing Bulb By Others Evacuate and Charge the CoilInstallation of Chilled Water Coil Piping optional Installation of Building Pressure Control optionalStart-Up Blower Set-up Optional Components Start-Up Single Stage Control Reset the Temperature SettingStart-Up Furnaces all units Send Unit to High FireSend Unit to Low Fire Start-Up 21 Staged ControlStart-Up 81 Staged Control Check the Low Fire Manifold PressureEdit the Setting Access the Setpoints MenuAccess the Discharge Air Temperature Setting Access the Inlet Air Sensor SettingAccess the Room Override Setting High Fire Adjustment Start-Up 21 Electronic ModulationStart-Up 41 Electronic Modulation Exit High Fire ModeCheck the Low Fire Manifold Pressures Access the Setpoints Menu Set Minimum Outside Air Verify Sensor InstallationStart-Up Economizer optional Set the Enthalpy Changeover Set Point optionalStart-Up Evaporative Cooling optional Start-Up Water Wizard optional Operation - Water Wizard optional Check Operation VAV Units optional External Signal a variableBuilding Pressure Control Building Pressure Control a Check Operation Recirculating Units optionalRecirculation Operation Damper actuator may take a fewSequence of Operation Staged Sequence Exhaust Fan Contact S1 Manually Closed optionalSequence of Operation 21 Modulation Sequence Sequence of Operation Modulation Sequence Discharge Air Temperature dtSOutside Air Temperature OAt Operation Modulation Staged ControllerOptional Room Override ROt Sequence of Operation 41 Electronic ModulationProgram Revision Number Light Off BlinkingSequence of Operation Electronic Modulation Sequence of Operation Staged Control Staging Control Sequence of OperationOperation and Errors Ignition Controller Following are the green LED codes of operationOperation Economizer Option EC-1 Outside Air Temperature ReferenceOption EC-3 Differential Temperature Control Option EC-2 Outside Air Enthalpy ReferenceTroubleshooting Blower Does Not OperateMotor Over Amps Insufficient Airflow Too Much AirflowExcessive Noise or Vibration Single or 21 Stage Furnace Will Not Light Improper manifold pressureModulating Furnace Will Not Light Heat transformer TR2 fault Ignition controllers IC# failed Staged Furnace Will Not Light Internal high limit tripped temperature above set point Evaporative Cooler does not Operate Recirculating pump Water Blows through Evaporative CoolerAdjust the On Time Factor Adjust the Manual Supply ValveWater Wizard Improper Water Supply Snow Accumulation Maintenance RoutineBelt Drives WheelsChilled Water Coils MotorsFilters Evaporative CoolersMaintenance Fall Flushing Coils Reference Model IG Venting Connection Location Reference Model IGX Venting Connection LocationReference Model IG Single or 2 Stage Reference Model IG Staged Reference Model IG Modulation Modulating Reference Model IGX Blower Control Center Manifold Gas Pressure Test Port Staged Inch Gas Supply Manifold Gas Pressure Test Port Modulating Staged Reference Performance Table Performance TableReference Start-Up Checklist Start-Up ChecklistMaintenance Log Warranty
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