Rtaa Circuit Capacities (Nominal Tons); Equivalent Lengths Of Non-Ferrous Valves And Fittings (Feet) - Trane RTAA-70 Installation & Maintenance Manual

RTAA-SVX01A-EN
Installation — Remote Evaporator
Table 2

RTAA Circuit Capacities (nominal tons)

Model Circuit 1
70 35
80 40
90 50
100 50
110 60
125 60
Table 3

Equivalent Lengths of Non-Ferrous Valves and Fittings (feet)

Line Size Globe
Inches OD Valve
1-1/8 87
1-3/8 102
1-5/8 115
2-1/8 141
2-5/8 159
3-1/8 185
Reproduced by permission of Air Conditioning and Refrigeration Institute
3. Piping between the evaporator and outdoor unit is not to exceed 200
actual feet and/or an equivalent length of 300 feet. (The latter includes the
equivalent length of pressure drops of all associated field installed
fittings, valves, accessories, and straight lengths of interconnecting
piping including the suction accumulator.)
4. Horizontal portions of suction lines must be downward sloping toward
the compressor at least 1/2 inch for each 10 feet of run. This promotes
the movement of oil in the direction of gas flow.
5. Suction lines must be insulated.
6. The line sizes defined in
leaving water temperature and/or full-load ice-making applications.
NOTE: The factory must size piping for leaving water temperatures other
than 40-50 F .
Circuit 2
35
40
40
50
50
60
Short Angle Short Radius
Valve ELL
29 2.7
33 3.2
34 3.8
39 5.2
44 6.5
53 8
Table 4, 5, and 6 are to be used only for 40-50 F
Long Radius
ELL
1.9
2.2
2.6
3.4
4.2
5.1
35