Greenheck Fan 473501 manual Routine Maintenance, Maintenance Frequency, Dampers, Fan Belts

Routine Maintenance

DANGER

Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit to OFF at disconnect switch(es). Unit may have multiple power supplies.

CAUTION

Use caution when removing access panels or other unit components, especially while standing on a ladder or other potentially unsteady base. Access panels and unit components can be heavy and serious injury may occur.

This unit requires minimal maintenance to operate properly. To ensure proper operation and longevity, the following items should be completed. The items in this list assume a relatively clean air environment, and may require attention more frequently in a dirty or dusty area. If this unit contains an indirect gas heater, refer to the Installation, Operation and Maintenance Manual provided with the unit for maintenance purposes. A Certified Technician should complete all refrigerant systems checks.

Maintenance Frequency:

Monthly

1. External Filter

Check for cleanliness – clean if required

2. Internal Filter

Check for cleanliness – replace if required

3.Condensate Drain (if applicable)

Inspect and clean – refill with water

4.Bearings

Lubricate per the schedule in the Fan Bearings section

Semiannually

1. Fan Belts

Check for wear, tension, alignment

2. Check for belt wear

Check pulley, bearings, and motor

3. Bearings

Lubricate per the schedule in the Fan Bearings section

Annually

It is recommended that the annual inspection and maintenance occur at the start of the cooling season. After completing the checklist, follow the unit start- up checklist provided in the manual to ensure the refrigeration system operates in the intended matter.

1. Lubrication

Apply lubrication where required

2. Dampers

Check for unobstructed operation

36Model ERCH-HP Energy Recovery Unit

3. Motors

Check for cleanliness

4. Fan Belts

Check for wear, tension, alignment

5.Blower Wheel & Fasteners Check for cleanliness

Check all fasteners for tightness Check for fatigue, corrosion, wear

6.Bearings

Lubricate per the schedule in the Fan Bearings section

7. Door Seal

Check if intact and pliable

8. Wiring Connections

Check all connections for tightness

9.Inspect all coils for cleanliness. Clean if required.

10.Inspect exterior and interior of entire unit for surface rust. If rust is found, remove rust and coat the blemished area with an appropriate protectant.

Heat Pump

An annual inspection of the heat pump system by a licensed refrigeration mechanic is recommended.

1.Inspect entire heat pump for cleanliness.

2.Record performance data for volts, amps and water temperature differences (both heating and cooling).

3.Compare annual data to recorded start-up data.

Maintenance Procedures:

Lubrication

Check all moving components for proper lubrication. Apply lubrication where required. Any components showing excessive wear should be replaced to maintain the integrity of the unit and ensure proper operation.

Dampers

Check all dampers to ensure they open and close properly and without binding. Backdraft dampers can be checked by hand to determine if blades open and close freely. Apply power to motorized dampers to ensure the actuator opens and closes the damper as designed.

Fan Belts

Belts must be checked on a regular basis for wear, tension, alignment, and dirt accumulation. Premature or frequent belt failures can be caused by improper belt tension (either too loose or too tight) 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. Conversely, loose belts will cause squealing on start-up, excessive belt flutter, slippage, and overheated sheaves. Both loose and tight belts can cause fan vibration.