2
The United States Environmental Protection Agency (EPA)
has issued various regulations regarding the introduc-
tion and disposal of refrigerants. Failure to follow these
regulations may harm the environment and can lead to
the imposition of substantial fines.
Should you have any
questions please contact the local office of the EPA.
If replacing a condensing unit or air handler, the system must
be manufacturer approved and Air Conditioning, Heating and
Refrigeration Institute (AHRI) matched.
NOTE:
Installation
of unmatched systems is strongly discouraged.
Operating the unit in a structure that is not complete (either
as part of new construction or renovation) will void the war-
ranty.
F
EATURES
This heat pump is a part of the ComfortNet™ family of prod-
ucts. It may be installed as part of a “legacy” system using a
standard 24 VAC thermostat. However, with the CTK0*AA
ComfortNet™ thermostat kit, this heat pump may be installed
as part of a digitally communicating system. The ComfortNet™
system provides automatic airflow configuration, enhanced setup
features, and enhanced diagnostics. It also reduces the num-
ber of thermostat wires to a maximum of four and a minimum
of two.
I
NSTALLATION
C
LEARANCES
Special consideration must be given to location of the con-
densing unit(s) in regard to structures, obstructions, other
units, and any/all other factors that may interfere with air cir-
culation. Where possible, the top of the unit should be com-
pletely unobstructed; however, if vertical conditions require
placement beneath an obstruction
there should be a mini-
mum of 60 inches between the top of the unit and the
obstruction(s).
The specified dimensions meet requirements
for air circulation only. Consult all appropriate regulatory codes
prior to determining final clearances.
Another important consideration in selecting a location for
the unit(s) is the angle to obstructions. Either side adjacent
the valves can be placed toward the structure provided the
side away from the structure maintains minimum service clear-
ance. Corner installations are strongly discouraged.
OK!
OK!
AA
AA
A
A
C
C
C
C
OK!
OK!
OK!
OK!
NOT
RECOMMENDED
AA
AA
AA
AA
AA
B
B
B
B
Model Type
A
B
C
AA
Residential
10"
10"
18"
20"
Light Commercial
12"
12"
18"
24"
Minimum Airflow Clearance
This unit can be located at ground floor level or on flat roofs. At
ground floor level, the unit must be on a solid, level foundation
that will not shift or settle. To reduce the possibility of sound
transmission, the foundation slab should not be in contact
with or be an integral part of the building foundation. Ensure
the foundation is sufficient to support the unit. A concrete slab
raised above ground level provides a suitable base.
R
OOFTOP
I
NSTALLATIONS
If it is necessary to install this unit on a roof structure, ensure
the roof structure can support the weight and that proper
consideration is given to the weather-tight integrity of the roof.
Since the unit can vibrate during operation, sound vibration
transmission should be considered when installing the unit.
Vibration absorbing pads or springs can be installed between
the condensing unit legs or frame and the roof mounting as-
sembly to reduce noise vibration.
NOTE:
These units require special location consideration in
areas of heavy snow accumulation and/or areas with
prolonged continuous subfreezing temperatures. Heat pump
unit bases have cutouts under the outdoor coil that permit
drainage of frost accumulation. Situate the unit to permit free
unobstructed drainage of the defrost water and ice. A
minimum 3” clearance under the outdoor coil is required in the
milder climates.
In more severe weather locations, it is recommended that the
unit be elevated to allow unobstructed drainage and air flow.
The following elevation minimums are recommended:
Design Temperature
Suggested Minimum Elevation
+15° and above
2 1/2"
-5° to +14°
8"
below -5°
12"