Greenheck Fan ERVe manual Vibration, Energy Recovery Wheel, Drive Belt, Air Seals

Wheel Unbalance

Drive Pulley Misalignment Incorrect Belt Tension Bearing Misalignment Mechanical Looseness Faulty Belts

Drive Component Unbalance Poor Inlet/Outlet Conditions Foundation Stiffness

Vibration

Excessive vibration may be experienced during initial start-up. Left unchecked, excessive vibration can cause a multitude of problems, including structural and/or component failure. The most common sources of vibration are listed.

Many of these conditions can be discovered by careful observation. Refer to the Troubleshooting section of this manual for corrective actions. If observation cannot locate the source of vibration, a qualified technician using vibration analysis

equipment should be consulted. If the problem is wheel unbalance, in-place balancing can be done.

Generally, fan vibration and noise is transmitted to other parts of the building by the ductwork. To eliminate this undesirable effect, the use of heavy canvas connectors is recommended.

Energy Recovery Wheel

The ERVe models contain a total energy recovery wheel. The wheels are inspected for proper mechanical operation at the factory. However, during shipping and handling, shifting can occur that may affect wheel operation. The wheel is accessible through the access

door marked “Energy Wheel Cassette Access”.

Turn the energy recovery wheels by hand to verify free operation.

The wheel should rotate smoothly and should not

wobble.	Inside layout of ERVe
	Bearing
Adjustable	Support
Air Seals
Drive Belt	Label
	showing
	cassette
	serial #
	and date
Drive Pulley	code

Drive Belt

Inspect the drive belt. Make sure the belt rides smoothly through the pulley and over the wheel rim.

Air Seals

Check that the air seals located around the outside of the wheel and across the center (both sides of wheel) are secure and in good condition. Air seal clearance is determined by placing a sheet of paper, to act as a feeler gauge, against the wheel face. To access seals, follow the instructions in the Energy Recovery Wheel Maintenance section. To adjust the air seals, loosen all eight seal retaining screws. These screws are located on the bearing support that spans the length of the cassette through the wheel center. Tighten the screws so the air seals tug slightly on the sheet of paper.

Replace cassette into unit, plug in wheel drive, replace access door and apply power. Observe by opening door slightly (remove filters if necessary to view wheel) the wheel should rotate freely at about 20-40 RPM.

22Model ERVe Energy Recovery Unit