Page 14
mrcool.com
Unit Installation
Ductwork
This air handler is designed for a complete supply and return ductwork system.
Return ductwork:
DO NOT
dispose of 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 for the air handler or externally using a return air filter grille.
Electric Heater
The air handlers listed in this manual do not have a factory installed electric heater. An electric heat kit is
available as an optional accessory. The only heat kits that can be used are
MHK**U
series listed on the
following page. Please refer to installation instructions provided with the heat kit for the correct installation
procedure.
WARNING
DO NOT
operate the unit without all ductwork completed and attached.
•
Inadequate ductwork that restricts airflow can result in improper performance and could cause
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.
WARNING
The electrical characteristics of the air handler, the electric heat kit, and the supply power should be
identical.
