Filter
Top Products
34
UNIT START-UP
Energy Recovery Wheel
The HRE models contain a sensible 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”. For
theHRE-20ANDHRE-45models,thewheelcassetteslidesout.
DuetothesizeandweightoftheHRE-55ANDHRE-90wheels,
they remain stationary and all maintenance is performed in place.
There is room inside the unit to perform energy recovery wheel
servicing.
Turn the energy recovery wheels by hand to verify free operation.
The wheel should rotate smoothly and should not wobble.
Drive Belt
Inspect the drive belt. Make sure the belt rides smoothly through the pulley and over the wheel rim.
Air Seals
Air seals are located around the perimeter of the
wheel and across the face of the wheel (both sides
of wheel). Check that these seals are secure and in
good condition.
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, enter unit for HRE-55 &
HRE-90, or pull out the cassette for HRE-20 & HRE-
45, following the instructions in 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) that the wheel rotates freely at about 35 RPM.
Drive Belt
Drive Pulley
Adjustable
Air Seals
Label showing
cassette serial #
and date code
Bearing Support
Inside layout of HRE unit