Corp. Air Conditioner User Manual

22
Model ERVe Energy Recovery Unit
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.
Wheel Unbalance
Drive Pulley Misalignment
Incorrect Belt Tension
Bearing Misalignment
Mechanical Looseness
Faulty Belts
Drive Component Unbalance
Poor Inlet/Outlet Conditions
Foundation Stiffness
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.
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
Drive Belt
Adjustable
Air Seals
Label
showing
cassette
serial #
and date
code
Bearing
Support
Drive Pulley