IMPORTANT: Do not operate system without a filter. A filter is required to protect the coil, blower, and internal parts from excessive dirt and dust. The filter is placed in the return duct by the installer.
Repairing or Replacing Cabinet Insulation
IMPORTANT: DAMAGED INSULATION MUST BE REPAIRED OR REPLACED before the unit is put back into operation. Insulation loses its insulating value when wet, damaged, separated or torn.
REPAIRING DAMAGED INSULATION
FIGURE 18. Repairing Insulation
NOTICE: Failure to follow instructions will cause damage to the unit.
This unit is equipped with an aluminum coil. Aluminum coils may be damaged by exposure to solutions with a pH below 5 or above 9. The aluminum coil should be cleaned using potable water at a moderate pressure (less than 50psi). If the coil cannot be clean
In coastal areas, the coil should be cleaned with potable water several times per year to avoid corrosive buildup (salt).
Use of Air Handler During Construction
Lennox does not recommend the use of its air handler unit during any phase of construction. Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit.
Air handler units may be used for heating (heat pumps) or cooling of buildings under construction, if the following conditions are met: