Greenheck Fan HEAT RECOVERY UNIT WITH EVAPORATIVE COOLING HRE-20 - Manual (Page 38)

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Access to wheel through
outdoor air filter door
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.
ACCESSING ENERGY RECOVERY WHEEL
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 .
ROUTINE MAINTENANCE
IMPORTANT! PLACE RETAINERS BACK IN THE
ORIGINAL POSITION BEFORE
ROTATING THE ENERGY RECOVERY WHEEL.
OTHERWISE DAMAGE TO RETAINER WILL
OCCUR.
Bracket Segment Retainer
Lift Away
From Segment
Catch-
Segment Retainer
Push Toward Center
Center of Wheel
Spoke
Inside of Wheel Rim
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) .
REMOVING THE ENERGY RECOVERY WHEEL SEGMENTS
Wheel segment removed