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6. CONNECTING REFRIGERANT
TUBING BETWEEN THE
INDOOR AND OUTDOOR UNIT
CAUTION:
This system utilizes R-410A refrigerant
with POE oil. When servicing, cover
or seal openings to minimize the
exposure of the refrigerant system
to air to prevent accumulation of
moisture and other contaminants.
General — Once outdoor and indoor unit place-
ment has been determined, route refrigerant
tubing between the equipment in accordance
with sound installation practices. Refrigerant
tubing should be routed in a manner that mini-
mizes the length of tubing and the number of
bends in the tubing. Refrigerant tubing should
be supported in a manner that the tubing will
not vibrate or abrade during system operation.
Tubing should be kept clean of foreign debris
during installation and installation of a liquid
line fi lter drier is recommended if cleanliness
or adequacy of system evacuation is unknown
or compromised. Every effort should be made
by the installer to ensure that the fi eld installed
refrigerant containing components of the system
have been installed in accordance with these
instructions and sound installation practices
so as to insure reliable system operation and
longevity. The maximum recommended intercon-
necting refrigerant line length is 75 feet, and the
vertical elevation difference between the indoor
and outdoor sections should not exceed 20 feet.
Consult long line application guide for installa-
tions in excess of these limits.
Filter Dryer Installation —A fi lter dryer is
provided with the unit and must be installed in
the liquid line of the system. If the installation
replaces a system with a fi lter dryer already
present in the liquid line, the fi lter dryer must be
replaced with the one supplied. The fi lter dryer
must be installed in strict accordance with the
manufacturer's installation instructions.
Optional Equipment — Optional equipment
(e.g.: fi lter/driers, liquid line solenoid valves, etc.)
should be installed in strict accordance with the
manufacturer's installation instructions.
7. MAKING ELECTRICAL
CONNECTIONS
WARNING:
Turn off all electrical power at the main
circuit box before wiring electrical
power to the outdoor unit. Failure to
comply may cause severe personnel
injury or death.
Wiring Diagram/Schematic — A wiring dia-
gram/schematic is located on the inside cover
of the electrical box of the outdoor unit. The
installer should become familiar with the wiring
diagram/schematic before making any electrical
connections to the outdoor unit.
Outdoor Unit Connections — The outdoor
unit requires both power and control circuit
electrical connections. Refer to the unit wiring
diagram/schematic for identifi cation and location
of outdoor unit fi eld wiring interfaces.
Control Circuit Wiring — The outdoor unit is
designed to operate from a 24 VAC Class ll control
circuit. Control circuit wiring must comply with
the current provisions of the "National Electrical
Code" (ANSI C1.) and with applicable local codes
having jurisdiction.
Thermostat Connections — Thermostat con-
nections should be made in accordance with the
instructions supplied with the thermostat, and
with the instructions supplied with the indoor
equipment.
Electrical Power Wiring — Electrical power wir-
ing shall comply with the current provisions of the
"National Electrical Code" (ANSI C1.) and with
applicable local codes having jurisdiction. Use
of rain tight conduit is recommended. Electrical
conductors shall have minimum circuit ampac-
ity in compliance with the outdoor unit rating
label. The facility shall employ electrical circuit
protection at a current rating no greater than that
indicated on the outdoor unit rating label.
Minimum Circuit Ampacity — Electrical wiring
to the equipment must be compatible and in
compliance with the minimum circuit ampacity
listed on the outdoor unit data label.
5
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