Energy Recovery Wheel Maintenance; Accessing Energy Recovery Wheel; Removing Wheel Segments - Greenheck HRE-20 Installation, operationand Maintenance Manual

ROUTINE MAINTENANCE

Energy Recovery Wheel Maintenance

Annual inspection of the energy recovery wheel is recommended . Units
ventilating smoking lounges and other non-clean air spaces should
have energy recovery wheel inspections more often based upon need .
Inspections for smoke ventilation applications are recommended
bimonthly to quarterly until a regular schedule can be established .

ACCESSING ENERGY RECOVERY WHEEL

The HRE units have one energy recovery wheel . Open the outdoor
air filter door to access the wheel . For the HRE-20 and HRE-45
models, the wheel cassette slides out . Due to the size and weight
of the HRE-55 and HRE-90 wheels, they remain stationary and all
maintenance is performed in place . There is room inside the unit to
perform energy recovery wheel servicing . Filters must be removed to
access stationary wheels .
**WARNING: Disconnect power to the unit before performing
any type of service.
REMOVING THE ENERGY RECOVERY WHEEL SEGMENTS
Models HRE-20, 45, 55, & 90
Steel retainers are located on the
inside of the wheel rim (see diagram
at right) . Push the retainer toward
center of wheel, then lift up and
away to release segments (see
below) .
Wheel segment removed
38
Lift Away
From Segment
Catch-
Segment Retainer
Push Toward Center
IMPORTANT! PLACE RETAINERS BACK IN THE
ORIGINAL POSITION BEFORE
ROTATING THE ENERGY RECOVERY WHEEL.
OTHERWISE DAMAGE TO RETAINER WILL
OCCUR.
Access to wheel through
outdoor air filter door
Bracket Segment Retainer
Inside of Wheel Rim
Spoke