Trane R Series, Installation Operation & Maintenance

Page: 45 / 188

RLC-SVX07A-EN 45
Installation - Remote Condenser
Remote Air-Cooled Condenser Interconnecting
Refrigerant Piping
The RTUA compressor chiller is shipped with a full charge of oil, excluding the
additional charge for the field piping, and a nitrogen holding charge. The RTCA
unit is an air-cooled condenser that is designed for use with the RTUA unit.
The RTUA unit is designed to be most effective when used with the RTCA air-
cooled condenser. Other air-cooled condensers can be used in place of the
RTCA condenser, but the overall performance of the system may be different
from that published in the catalogs. The following section covers the required
piping between the RTUA unit and the appropriate air-cooled condenser.
The RTUA unit consists of an evaporator, two helical rotor compressors (one
per circuit), oil coolers, liquid line service valves, sightglasses, electronic
expansion valves and filter driers. The discharge line leaving the oil separator
is capped and brazed and the liquid line is terminated with a liquid line service
valve. The installing contractor need only provide the interconnecting piping
between the RTUA and the air-cooled condenser.
Refrigerant piping must be properly sized and applied, since these factors
have a significant effect on system performance and reliability.
RESTRICTIONS:
• Total distance between components should not exceed 200 feet (actual) or 300 feet (actual) or 300 feet (equivalent).
• Liquid line height must not exceed 15 ft. from the base of the air cooled condenser unit.
• Discharge line trap is recommended leaving the oil separator if the discharge piping runs for more than 10 (actual) feet
horizontally above the RTUA unit.
Figure 23 No Elevation Difference
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