General Information; Before You Install This Unit; Locating The Equipment; Heating Load - Nordyne iHybrid DF6SF Series Installation Instructions Manual

GEnERAl InFoRMAtIon

The Dual Fuel iHybrid™ heat pump is designed only for
outdoor rooftop or ground level installations and can be
readily connected to the duct system of a home. This unit
has been tested for capacity and efficiency in accordance
with AHRI Standards and will provide many years of safe
and dependable comfort, providing it is properly installed
and maintained. With regular maintenance, this unit will
operate satisfactorily year after year. Abuse, improper use,
and/or improper maintenance can shorten the life of the
appliance and create unsafe hazards.
To achieve optimum performance and minimize equipment
failure, it is recommended that periodic maintenance be
performed on this unit. The ability to properly perform
maintenance on this equipment requires certain tools and
mechanical skills.

Before you install this unit

√ The cooling load of the area to be conditioned must be
calculated and a system of the proper capacity selected.
It is recommended that the area to be conditioned be
completely insulated and vapor sealed.
√ Check the electrical supply and verify the power supply
is adequate for unit operation. Consideration should be
given to availability of electric power, service access,
noise, and shade. If there is any question concerning
the power supply, contact the local power company.
√ All units are securely packed at the time of shipment and
upon arrival should be carefully inspected for damage
prior to installing the equipment at the job site. Verify
coil fins are straight. If necessary, comb fins to remove
flattened or bent fins. Claims for damage (apparent or
concealed) should be filed immediately with the carrier.
√ Please consult your dealer for maintenance information
and availability of maintenance contracts. Read all
instructions before installing the unit.

Locating the Equipment

• Survey the job site to determine the best location for
the packaged unit. The unit should be located with
consideration of minimizing the length of the supply and
return ducts. If practical, place the equipment and its ducts
in an area where they will be shaded from the afternoon
sun, when the heat load is greatest. Consideration should
also be given to the accessibility of fuel, electric power,
service access, noise, and shade.
• Select a solid, level position, preferably on a concrete
slab, slightly above the grade level, and parallel to the
home. Do not PlACE UnIt UnDER tHE HoME.
• Overhead obstructions, poorly ventilated areas, and
areas subject to accumulation of debris should be
avoided. Do not place the unit in a confined space or
recessed area where discharge air from the unit could
re-circulate back through the condenser coil.
• Sufficient clearance for unobstructed airflow through the
louvered control access panel and outdoor coil must be
maintained in order to achieve rated performance. See
Figure 1 for minimum clearance requirements.
• A clearance of at least 36 inches from the blower access
panel and from the louvered control access panel is
recommended for servicing and maintenance.
Where accessibility clearances are greater than
clearances to combustibles, accessibility clearances
must take preference.
• The hot condenser air must be discharged up and away
from the home.

Heating load

This unit should be sized to provide the design heating
load requirement. Heating load estimates can be made
using approved methods available from Air Conditioning
Contractors of America (Manual J); American Society of
Heating, Refrigerating, and Air Conditioning Engineers;
or other approved engineering methods. For installations
above 2,000 ft., the unit should have a sea level input
rating large enough that it will meet the heating load after
deration for altitude.
See Note 1
36"
36"
Clearances to Combustibles
NOTE 1: 6" When coil is present on duct side.
NOTE 2: 1" When no coil is present on duct side.
Figure 1. Clearance Requirements
See Note 2
36"
Minimum Required
5