Air Handler
6
the installation instructions of the condensing unit. The clearance between a combustible surface
and the unit is “0”; however, service clearance takes precedence. Allow a minimum of 24” in front of
the unit for service clea
rance. When installing in an area directly over a finished ceiling (such as an
attic), a drain pan for emergency is required. Check local and state codes for requirements. When
installing this unit in an area that may become wet, elevate the unit with a firm and non-porous
material. To avoid of personal injury during installation (i.e. in a garage), it is advised to install a
protective barrier to prevent such damage.
5. Ductwork
This air handler is designed for a complete supply and return ductwork system.
To ensure correct system performance, the ductwork is to be sized to accommodate 375-
425 CFM per ton of cooling with the static pressure or less than 5" WC. Inadequate ductwork that
restricts airflow may result in improper performance and compressor or heater failure. Ductwork
is designed with less restrictions of airflow and maintains suitable airflow speed.
And keep the
ductwork sealed with good hermeticity.
Return Ductwork.
Do not place the duct inlet at a place where is filled with toxic gas or
harmful fume/odor. For upflow configuration, duct terminal connects to the bottom of the air handler.
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.
6. Electric Heat
The air handlers listed in this manual do not have factory installed electric heat. Electric heat is
available as an accessory. The only heater kits that can be used are
VAF
d series. Please refer to
installation instructions provided with heater kit for the correct installation procedure.
WARNING
REFER TO THE “INSTALLING ELECTRIC HEAT” SECTION OF THIS MANUAL AND THE
INSTRUCTIONS PROVIDED WITH THE HEATER KIT FOR THE CORRECT INSTALLATION
PROCEDURE.
WARNING
THE ELECTRICAL CHARACTERISTICS OF THE AIR HANDLER, THE ELECTRIC HEATER
KIT, AND THE SUPPLY POWER MUST AGREE. THIS AIR HANDLER DOES NOT HAVE
FACTORY INSTALLED ELECTRIC HEAT. ELECTRIC HEAT IS AVAILABLE AS AN ACCESSORY.
IF INSTALLING THIS OPTITION, THE ONLY HEATER KITS THAT CAN BE USED ARE THE
VAF
d SERIES AS INDICATED BELOW.
WARNING
DO NOT OPERATE THE UNIT WITHOUT ALL DUCTWORK COMPLETED.
