Greenheck Fan Part #470655 manual Maintenance - Routine, Snow Accumulation, Motors, Wheels

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Maintenance - Routine

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.

Motors

Motor maintenance is generally limited to cleaning and lubrication (where applicable).

Cleaning should be limited to exterior surfaces only. Removing dust and grease build-up on the motor assures proper motor cooling.

Motors supplied with grease fittings should be greased in accordance with the manufacturer’s recommendations.

important

Do not allow water or solvents to enter the motor or bearings. Motors and bearings should never be sprayed with steam, water or solvents.

important

Greasing motors is only intended when fittings are provided. Many motors are permanently lubricated, requiring no additional lubrication.

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.

24 DGX Industrial Space Heating

®

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Contents General Safety Information 2.Do not touch electrical switchesIf you smell gas 1.Open windows 3.Extinguish any open flameInspection and Maintenance during Storage ReceivingUnpacking HandlingTable of Contents Clearance to Combustibles / Service ClearancesInstallation TroubleshootingInstallation of Indoor Unit 1. Install Hangers2. Install Unit 3. Seal Wall OpeningInstallation of Arrangement DB / HZ 1.Install Curb and/or Equipment Supports2. Install Ductwork 4. Install UnitInstallation of Diffuser and Remote Panel TSCP 1. Install Diffuser2. Install TSCP AirflowInstallation of Electrical Wiring 1.Determine the Size of the Main Power Lines3.Connect the Main Power 4. Wire the Optional Convenience OutletInstallation of Gas Piping 2.Install Additional Regulator if Required1.Determine the Supply Gas Requirements 3. Connect the Supply Gas LineStart-Up- Blower 4. Pipe the Optional Vent Line5. Test the System for Leaks Pre Start-UpCheck5.Air Volume Measurement and Check 2.Check the Blower Rotation3. Check for Vibration 4. Motor CheckStart-UpDirect Gas Start-UpDirect Gas • 100% Outside Air1. Check the Supply Gas Pressure 4a. Set the Burner Air Pressure DifferentialStart-UpDirect Gas 50/50 Recirculation 4b. Set the Burner Air Pressure Differential5. Set the Low Fire Time Delay 6. Set the Maximum Firing RateStart-UpDirect Gas continued Regulators and Modulating Valves7. Set the Minimum Firing Rate 8. Set Daytime Temperature11.Flame Signal Check 9. Set Nighttime Temperature10.Program the 7 Day Time Clock Flame Signal CheckWithout 7-DayTimer 1.Switch S2 in Summer Mode2.Switch S2 in Winter Mode 3.Flame Safeguard FSG SequenceOperation - Electrical Sequence With 7-DayTimer 1.Switch S2 in Summer Mode2.Switch S2 in Winter Mode 3.Flame Safeguard FSG SequenceTroubleshooting Blower Does Not OperateTurn Supply Switch S2 On ResetMotor Overamps TroubleshootingReference Blower Start-Up- Step #5 Reference Blower Start-Up- Step #2Insufficient Airflow Too Much AirflowTroubleshooting Reference Filters in the Maintenance sectionExcessive Noise or Vibration TroubleshootingReference Bearings in the Maintenance section Heater Does Not Operate TroubleshootingTurn Heat Switch S4 On Wire Heat Switch S4Troubleshooting Uncross wires and reconnectIf problems remain, consult the factory Heater Does Not OperateTroubleshooting Adjust drives as neededHeater Does Not Operate Reference Direct Gas Start-Up- Step #11Maintenance - Routine Snow AccumulationMotors WheelsBearings FiltersMaintenance - Fall High LimitBurner Gas TrainReference Typical Gas Train Layout 400 – 800 MBHDGX Industrial Space Heating Dirty Filter Switch Typical Control Center LayoutReference 28 DGX Industrial Space HeatingStart-UpChecklist Typical setting 5 minutes 45ºFTypical setting varies ReferenceMaintenance Log Maintenance Log Warranty Copyright 2012 Greenheck Fan Corporation