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2. The unit should be set on a level support pad at least as large as the unit base pan, such as a concrete slab. If this is not the application used please refer to application bulletin "Trane APB2001-02". 3. The support pad must NOT be in direct contact with any structure. Unit must be positioned a minimum of 12" from any wall or surrounding shrubbery to insure adequate airflow. Clearance must be provided in front of control box (access panels) and any other side requiring service access to meet National Electrical Code. Also, the unit location must be far enough away from any structure to prevent excess roof run-off water from pouring directly on the unit. Do not locate unit(s) close to bedroom(s). 4. The top discharge area must be unrestricted for at least five (5) feet above the unit. 5. When the outdoor unit is mounted on a roof, be sure the roof will support the unit's weight. Properly selected isolation is recommended to prevent transmission to the building structure. 6. The maximum length of refrigerant lines from outdoor to indoor unit should NOT exceed eighty (80) feet. 7. If outdoor unit is mounted above the air handler, maximum lift should not exceed twenty-five (25) feet (suction line). If air handler is mounted above condensing unit, maximum lift should not exceed twenty-five (25) feet (liquid line). 8. Locate and install indoor coil or air handler in accordance with instruction included with that unit. C. iNSTALLiNG REFRIGERANT LINES If using existing refrigerant lines make certain that all joints are brazed, not soldered. Condensing units have provisions for braze connections. Pressure taps are provided on the service valves of outdoor unit for compressor suction and liquid pressures. situation requirements. This should be thoroughly checked out before ordering refrigerant line sets. The gas line must always be insulated. in scroll compressor applications, dome temperatures may be hot. Do not touch top of compressor, may cause minor to severe burning. The units are factory charged with the system charge required when using fifteen (15) feet of connecting line. Unit nameplate charge is the same. Final refrigerant charge adjustment is necessary. Use the Charging Charts in the outdoor unit Service Facts. 1. Determine the most practical way to run the lines. 2. Consider types of bends to be made and space limitations. NOTE: Large diameter tubing will be very difficult to rebend once it has been shaped. 3. Determine the best starting point for routing the refrigerant tubing --INSIDE OR OUTSIDE THE STRUCTURE. 4, Provide a pull-thru hole of sufficient size to allow both liquid and gas lines. 5, Be sure the tubing is of sufficient length. 6. Uncoil the tubing --do not Mnk or dent. 7. Route the tubing making all required bends and properly secure the tubing before making connections. 8, To prevent a noise within the building structure due to vibration transmission from the refrigerant lines, the following precautions should be taken: a. When the refrigerant lines have to be fastened to floor joists or other framing in a structure, use isolation type hangers. b. Isolation hangers should also be used when refrigerant lines are run in stud spaces or enclosed ceilings. c. Where the refrigerant lines run through a wall or sill, they should be insulated and isolated. d. Isolate the lines from all ductwork. ® LiQUiD LiNE SERVICE VALVE ROLLED EDGE TO CAPTIVATE STEM CAP UNIT SIDE OF HEX HEADED SERVICEVALVE STEM PORT "_ / LIQUIDLINE CONNECTION © 2005 American Standard inc. All Rights Reserved 18-BC55D1-2 © GAS LiNE SERVICE VALVE CAP_ _ 1/4 TURN ONLY COUNTERCLOCKWISE FOR FULL OPEN I .... POSITION OF VALVE ........ F"_ STE" PRESSURE TAP PORT J GAS LINE CONNECTION CAP_ D. SERVICE VALVE OPERATION BRASS LIQUID LINE SERVICE VALVE The Brass Liquid Line Service Valve is factory shipped in the seated position to hold factory charge. The pressure tap service port (when depressed) opens only to the field brazing side of th...

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