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Lennox VRF Air Handler Indoor Unit
4.4 Condensate Removal
The drain pan has primary and secondary drain connection (Figure 8). Condensate removal is
performed by attaching a 3/4" PVC pipe to the evaporator coil pan and terminated in accordance
with local or state Plumbing/HVAC codes. The installation must include a "P" style trap that is
located closely to the evaporator coil. Do not over-tighten the drain connection(s) in order to
prevent possible damage to the evaporator drain pan.
See Fig 4.6 for details of a typical condensate line "P" trap.
4.5 Ductwork
This air handler is designed for a complete supply and return ductwork system.
WARNING: Do not operate the unit without all ductwork completed.
Do not operate this product without all ductwork attached.
Inadequate ductwork that restricts airflow can result in improper performance and compressor
or heater failure. Ductwork is to be constructed in a manner that limits restrictions and maintains
suitable air velocity. Ductwork is to be sealed to the unit in a manner that will prevent leakage.
Return Ductwork: Do not terminate the return ductwork in an area that can introduce toxic, or
objectionable fumes/odors into the ductwork. The return ductwork is to be introduced into the air
handler bottom (upflow configuration).
Return Air Filters: Each installation must include a return air filter. This filtering may be
performed at the air handler or externally such as a return air filter grille.
4.6 Installation of Wired Controller
Please refer to User Manual of Wired Controller for the installation details.
Note: When installation is finished, the unit must be tested and debugged before
operation. Please refer to Instruction Manual of ODU for auto addressing and debugging
details.
Fig 4.4
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