Connecting Refrigerant Tubing Between
the Indoor & Outdoor Unit
CAUTION:
When servicing, cover or seal openings to minimize the exposure of the refrigerant system to air to prevent accumulation of moisture and other contaminants.
After outdoor and indoor unit placement has been determined, route refrigerant tubing between the equipment in accordance with sound installation practices.
•When connecting refrigerant linesets together, it is recommended that dry nitrogen be flowing through the joints during brazing.This will prevent internal oxidation and scaling from occurring.
•Refrigerant tubing should be routed in a manner that minimizes 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.
•Every effort should be made by the installer to ensure that the field installed refrigerant containing components of the system have been installed in accordance with these instructions and sound installation practices to insure reliable system operation and longevity.
•The maximum recommended interconnecting refrigerant line length is 75 feet, and the vertical elevation difference between the indoor and outdoor sections should not exceed 20 feet.
•If precise forming of refrigerant lines is required, a copper tubing bender is recommended. Avoid sharp bends and contact of the refrigerant lines with metal surfaces.
•A filter 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 filter dryer already present in the liquid line, the filter dryer must be replaced with the one supplied with the unit. The filter dryer must be installed in strict accordance with the manufacturer’s installation instructions.
•Optional equipment such as liquid line solenoid valves, low ambient, etc., should be installed in strict accordance with the manufacturer’s installation instructions.
ELECTRICAL WIRING
WARNING:
To avoid risk of electrical shock, personal injury, or death, disconnect all electrical power to the unit before performing any maintenance or service. The unit may have more than one electrical supply.
Label all wires prior to disconnection when servicing the unit. Wiring errors can cause improper and dangerous operation
•All electrical connections must be in compliance with all applicable local codes and ordinances, and with the current revision of the National Electric Code (ANSI/ NFPA 70).
•For Canadian installations the electrical connections and grounding shall comply with the current Canadian Electrical Code (CSA C22.1 and/or local codes).
Pre-Electrical Checklist
√Verify that the voltage, frequency, and phase of the supply source match the specifications on the unit rating plate.
√Verify that the service provided by the utility is sufficient to handle the additional load imposed by this equipment. Refer to the unit wiring label for proper high and low voltage wiring.
√Verify factory wiring is in accordance with the units wiring diagram (Figures
Line Voltage
•A wiring diagram is located on the inside cover of the electrical box of the outdoor unit. The installer should become familiar with the wiring diagram before making any electrical connections to the outdoor unit.
•An electrical disconnect must be located within sight of and readily accessible to the unit. This switch shall be capable of electrically
•Line voltage to the unit should be supplied from a dedicated branch circuit containing the correct fuse or circuit breaker for the unit. Incoming field wiring and minimum size of electrical conductors and circuit protection must be in compliance with information listed on the outdoor unit data label.Any other wiring methods must be acceptable to authority having jurisdiction.
•The outdoor unit requires both power and control circuit electrical connections. Refer to the wiring diagrams for identification and location of outdoor unit field wiring interfaces.Make all electrical connections in accordance with all applicable codes and ordinances.
•Overcurrent protection must be provided at the branch circuit distribution panel and sized as shown on the unit rating label and according to applicable local codes. See the unit rating plate for minimum circuit ampacity and maximum overcurrent protection limits.
•Provide power supply for the unit in accordance with the unit wiring diagram, and the unit rating plate. Connect
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