Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Lifting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
STORAGE
When a unit is not going to be in service for an extended amount of time, certain procedures should be
followed to keep the fans in proper operating condition .
• Rotate fan wheel monthly and purge grease from bearings once every three months
• Cover unit with tarp to protect from dirt and moisture (Note: do not use a black tarp as this will promote
condensation)
• Energize fan motor once every three months
• Store belts flat to keep them from warping and stretching
• Store unit in location which does not have vibration
• After storage period, purge grease from fan bearings before putting fan into service
If storage of unit is in a humid, dusty or corrosive atmosphere, rotate the fan and purge the bearings once a
month . Improper storage which results in damage to the unit or components will void the warranty .
BASIC OPERATION
The HRE brings in fresh, outdoor air and
removes stale, exhaust air . For summer
operation, the exhaust air flows through an
evaporative cooler (indirect) to lower the
air temperature . A sensible recovery wheel
transfers energy from the exhaust air to
the outdoor air at an efficiency of 70-80%
to reduce the temperature of the outdoor
air . The outdoor air can then flow thru an
optional evaporative cooler (direct) to further
reduce the temperature of the outdoor air .
The sensible wheel also recovers heat from
the exhaust in the winter to precondition the
outdoor air . Optional heaters are available
after the wheel for final tempering .
2
TABLE OF CONTENTS
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29-30
Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-33
Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Unit Troubleshooting . . . . . . .43 and Backcover
Warranty . . . . . . . . . . . . . . . . . . . . . . . . Backcover
Exhaust Air
discharged outside
Outdoor Air
Indirect
Sensible
Evaporative
Recovery
Cooler
Wheel
Direct
Conditioned Air
Evaporative
sent to space
Cooler
Exhaust Air
from building
Optional
Heater